text: /** @license React v16.1.1
   * react-dom.development.js
   *
   * Copyright (c) 2013-present, Facebook, Inc.
   *
   * This source code is licensed under the MIT license found in the
   * LICENSE file in the root directory of this source tree.
   */
  
  'use strict';
  
  (function (global, factory) {
  	typeof exports === 'object' && typeof module !== 'undefined' ? module.exports = factory(require('react')) :
  	typeof define === 'function' && define.amd ? define(['react'], factory) :
  	(global.ReactDOM = factory(global.React));
  }(this, (function (React) { 'use strict';
  
  /**
   * WARNING: DO NOT manually require this module.
   * This is a replacement for `invariant(...)` used by the error code system
   * and will _only_ be required by the corresponding babel pass.
   * It always throws.
   */
  
  /**
   * Copyright (c) 2013-present, Facebook, Inc.
   *
   * This source code is licensed under the MIT license found in the
   * LICENSE file in the root directory of this source tree.
   *
   */
  
  
  
  /**
   * Use invariant() to assert state which your program assumes to be true.
   *
   * Provide sprintf-style format (only %s is supported) and arguments
   * to provide information about what broke and what you were
   * expecting.
   *
   * The invariant message will be stripped in production, but the invariant
   * will remain to ensure logic does not differ in production.
   */
  
  var validateFormat = function validateFormat(format) {};
  
  {
    validateFormat = function validateFormat(format) {
      if (format === undefined) {
        throw new Error('invariant requires an error message argument');
      }
    };
  }
  
  function invariant(condition, format, a, b, c, d, e, f) {
    validateFormat(format);
  
    if (!condition) {
      var error;
      if (format === undefined) {
        error = new Error('Minified exception occurred; use the non-minified dev environment ' + 'for the full error message and additional helpful warnings.');
      } else {
        var args = [a, b, c, d, e, f];
        var argIndex = 0;
        error = new Error(format.replace(/%s/g, function () {
          return args[argIndex++];
        }));
        error.name = 'Invariant Violation';
      }
  
      error.framesToPop = 1; // we don't care about invariant's own frame
      throw error;
    }
  }
  
  var invariant_1$1 = invariant;
  
  !React ? invariant_1$1(false, 'ReactDOM was loaded before React. Make sure you load the React package before loading ReactDOM.') : void 0;
  
  // These attributes should be all lowercase to allow for
  // case insensitive checks
  var RESERVED_PROPS = {
    children: true,
    dangerouslySetInnerHTML: true,
    defaultValue: true,
    defaultChecked: true,
    innerHTML: true,
    suppressContentEditableWarning: true,
    suppressHydrationWarning: true,
    style: true
  };
  
  function checkMask(value, bitmask) {
    return (value & bitmask) === bitmask;
  }
  
  var DOMPropertyInjection = {
    /**
     * Mapping from normalized, camelcased property names to a configuration that
     * specifies how the associated DOM property should be accessed or rendered.
     */
    MUST_USE_PROPERTY: 0x1,
    HAS_BOOLEAN_VALUE: 0x4,
    HAS_NUMERIC_VALUE: 0x8,
    HAS_POSITIVE_NUMERIC_VALUE: 0x10 | 0x8,
    HAS_OVERLOADED_BOOLEAN_VALUE: 0x20,
    HAS_STRING_BOOLEAN_VALUE: 0x40,
  
    /**
     * Inject some specialized knowledge about the DOM. This takes a config object
     * with the following properties:
     *
     * Properties: object mapping DOM property name to one of the
     * DOMPropertyInjection constants or null. If your attribute isn't in here,
     * it won't get written to the DOM.
     *
     * DOMAttributeNames: object mapping React attribute name to the DOM
     * attribute name. Attribute names not specified use the **lowercase**
     * normalized name.
     *
     * DOMAttributeNamespaces: object mapping React attribute name to the DOM
     * attribute namespace URL. (Attribute names not specified use no namespace.)
     *
     * DOMPropertyNames: similar to DOMAttributeNames but for DOM properties.
     * Property names not specified use the normalized name.
     *
     * DOMMutationMethods: Properties that require special mutation methods. If
     * `value` is undefined, the mutation method should unset the property.
     *
     * @param {object} domPropertyConfig the config as described above.
     */
    injectDOMPropertyConfig: function (domPropertyConfig) {
      var Injection = DOMPropertyInjection;
      var Properties = domPropertyConfig.Properties || {};
      var DOMAttributeNamespaces = domPropertyConfig.DOMAttributeNamespaces || {};
      var DOMAttributeNames = domPropertyConfig.DOMAttributeNames || {};
      var DOMMutationMethods = domPropertyConfig.DOMMutationMethods || {};
  
      for (var propName in Properties) {
        !!properties.hasOwnProperty(propName) ? invariant_1$1(false, "injectDOMPropertyConfig(...): You're trying to inject DOM property '%s' which has already been injected. You may be accidentally injecting the same DOM property config twice, or you may be injecting two configs that have conflicting property names.", propName) : void 0;
  
        var lowerCased = propName.toLowerCase();
        var propConfig = Properties[propName];
  
        var propertyInfo = {
          attributeName: lowerCased,
          attributeNamespace: null,
          propertyName: propName,
          mutationMethod: null,
  
          mustUseProperty: checkMask(propConfig, Injection.MUST_USE_PROPERTY),
          hasBooleanValue: checkMask(propConfig, Injection.HAS_BOOLEAN_VALUE),
          hasNumericValue: checkMask(propConfig, Injection.HAS_NUMERIC_VALUE),
          hasPositiveNumericValue: checkMask(propConfig, Injection.HAS_POSITIVE_NUMERIC_VALUE),
          hasOverloadedBooleanValue: checkMask(propConfig, Injection.HAS_OVERLOADED_BOOLEAN_VALUE),
          hasStringBooleanValue: checkMask(propConfig, Injection.HAS_STRING_BOOLEAN_VALUE)
        };
        !(propertyInfo.hasBooleanValue + propertyInfo.hasNumericValue + propertyInfo.hasOverloadedBooleanValue <= 1) ? invariant_1$1(false, "DOMProperty: Value can be one of boolean, overloaded boolean, or numeric value, but not a combination: %s", propName) : void 0;
  
        if (DOMAttributeNames.hasOwnProperty(propName)) {
          var attributeName = DOMAttributeNames[propName];
  
          propertyInfo.attributeName = attributeName;
        }
  
        if (DOMAttributeNamespaces.hasOwnProperty(propName)) {
          propertyInfo.attributeNamespace = DOMAttributeNamespaces[propName];
        }
  
        if (DOMMutationMethods.hasOwnProperty(propName)) {
          propertyInfo.mutationMethod = DOMMutationMethods[propName];
        }
  
        // Downcase references to whitelist properties to check for membership
        // without case-sensitivity. This allows the whitelist to pick up
        // `allowfullscreen`, which should be written using the property configuration
        // for `allowFullscreen`
        properties[propName] = propertyInfo;
      }
    }
  };
  
  /* eslint-disable max-len */
  var ATTRIBUTE_NAME_START_CHAR = ":A-Z_a-z\\u00C0-\\u00D6\\u00D8-\\u00F6\\u00F8-\\u02FF\\u0370-\\u037D\\u037F-\\u1FFF\\u200C-\\u200D\\u2070-\\u218F\\u2C00-\\u2FEF\\u3001-\\uD7FF\\uF900-\\uFDCF\\uFDF0-\\uFFFD";
  /* eslint-enable max-len */
  var ATTRIBUTE_NAME_CHAR = ATTRIBUTE_NAME_START_CHAR + "\\-.0-9\\u00B7\\u0300-\\u036F\\u203F-\\u2040";
  
  
  var ROOT_ATTRIBUTE_NAME = 'data-reactroot';
  
  /**
   * Map from property "standard name" to an object with info about how to set
   * the property in the DOM. Each object contains:
   *
   * attributeName:
   *   Used when rendering markup or with `*Attribute()`.
   * attributeNamespace
   * propertyName:
   *   Used on DOM node instances. (This includes properties that mutate due to
   *   external factors.)
   * mutationMethod:
   *   If non-null, used instead of the property or `setAttribute()` after
   *   initial render.
   * mustUseProperty:
   *   Whether the property must be accessed and mutated as an object property.
   * hasBooleanValue:
   *   Whether the property should be removed when set to a falsey value.
   * hasNumericValue:
   *   Whether the property must be numeric or parse as a numeric and should be
   *   removed when set to a falsey value.
   * hasPositiveNumericValue:
   *   Whether the property must be positive numeric or parse as a positive
   *   numeric and should be removed when set to a falsey value.
   * hasOverloadedBooleanValue:
   *   Whether the property can be used as a flag as well as with a value.
   *   Removed when strictly equal to false; present without a value when
   *   strictly equal to true; present with a value otherwise.
   */
  var properties = {};
  
  /**
   * Checks whether a property name is a writeable attribute.
   * @method
   */
  function shouldSetAttribute(name, value) {
    if (isReservedProp(name)) {
      return false;
    }
    if (name.length > 2 && (name[0] === 'o' || name[0] === 'O') && (name[1] === 'n' || name[1] === 'N')) {
      return false;
    }
    if (value === null) {
      return true;
    }
    switch (typeof value) {
      case 'boolean':
        return shouldAttributeAcceptBooleanValue(name);
      case 'undefined':
      case 'number':
      case 'string':
      case 'object':
        return true;
      default:
        // function, symbol
        return false;
    }
  }
  
  function getPropertyInfo(name) {
    return properties.hasOwnProperty(name) ? properties[name] : null;
  }
  
  function shouldAttributeAcceptBooleanValue(name) {
    if (isReservedProp(name)) {
      return true;
    }
    var propertyInfo = getPropertyInfo(name);
    if (propertyInfo) {
      return propertyInfo.hasBooleanValue || propertyInfo.hasStringBooleanValue || propertyInfo.hasOverloadedBooleanValue;
    }
    var prefix = name.toLowerCase().slice(0, 5);
    return prefix === 'data-' || prefix === 'aria-';
  }
  
  /**
   * Checks to see if a property name is within the list of properties
   * reserved for internal React operations. These properties should
   * not be set on an HTML element.
   *
   * @private
   * @param {string} name
   * @return {boolean} If the name is within reserved props
   */
  function isReservedProp(name) {
    return RESERVED_PROPS.hasOwnProperty(name);
  }
  
  var injection = DOMPropertyInjection;
  
  var MUST_USE_PROPERTY = injection.MUST_USE_PROPERTY;
  var HAS_BOOLEAN_VALUE = injection.HAS_BOOLEAN_VALUE;
  var HAS_NUMERIC_VALUE = injection.HAS_NUMERIC_VALUE;
  var HAS_POSITIVE_NUMERIC_VALUE = injection.HAS_POSITIVE_NUMERIC_VALUE;
  var HAS_OVERLOADED_BOOLEAN_VALUE = injection.HAS_OVERLOADED_BOOLEAN_VALUE;
  var HAS_STRING_BOOLEAN_VALUE = injection.HAS_STRING_BOOLEAN_VALUE;
  
  var HTMLDOMPropertyConfig = {
    // When adding attributes to this list, be sure to also add them to
    // the `possibleStandardNames` module to ensure casing and incorrect
    // name warnings.
    Properties: {
      allowFullScreen: HAS_BOOLEAN_VALUE,
      // specifies target context for links with `preload` type
      async: HAS_BOOLEAN_VALUE,
      // Note: there is a special case that prevents it from being written to the DOM
      // on the client side because the browsers are inconsistent. Instead we call focus().
      autoFocus: HAS_BOOLEAN_VALUE,
      autoPlay: HAS_BOOLEAN_VALUE,
      capture: HAS_OVERLOADED_BOOLEAN_VALUE,
      checked: MUST_USE_PROPERTY | HAS_BOOLEAN_VALUE,
      cols: HAS_POSITIVE_NUMERIC_VALUE,
      contentEditable: HAS_STRING_BOOLEAN_VALUE,
      controls: HAS_BOOLEAN_VALUE,
      'default': HAS_BOOLEAN_VALUE,
      defer: HAS_BOOLEAN_VALUE,
      disabled: HAS_BOOLEAN_VALUE,
      download: HAS_OVERLOADED_BOOLEAN_VALUE,
      draggable: HAS_STRING_BOOLEAN_VALUE,
      formNoValidate: HAS_BOOLEAN_VALUE,
      hidden: HAS_BOOLEAN_VALUE,
      loop: HAS_BOOLEAN_VALUE,
      // Caution; `option.selected` is not updated if `select.multiple` is
      // disabled with `removeAttribute`.
      multiple: MUST_USE_PROPERTY | HAS_BOOLEAN_VALUE,
      muted: MUST_USE_PROPERTY | HAS_BOOLEAN_VALUE,
      noValidate: HAS_BOOLEAN_VALUE,
      open: HAS_BOOLEAN_VALUE,
      playsInline: HAS_BOOLEAN_VALUE,
      readOnly: HAS_BOOLEAN_VALUE,
      required: HAS_BOOLEAN_VALUE,
      reversed: HAS_BOOLEAN_VALUE,
      rows: HAS_POSITIVE_NUMERIC_VALUE,
      rowSpan: HAS_NUMERIC_VALUE,
      scoped: HAS_BOOLEAN_VALUE,
      seamless: HAS_BOOLEAN_VALUE,
      selected: MUST_USE_PROPERTY | HAS_BOOLEAN_VALUE,
      size: HAS_POSITIVE_NUMERIC_VALUE,
      start: HAS_NUMERIC_VALUE,
      // support for projecting regular DOM Elements via V1 named slots ( shadow dom )
      span: HAS_POSITIVE_NUMERIC_VALUE,
      spellCheck: HAS_STRING_BOOLEAN_VALUE,
      // Style must be explicitly set in the attribute list. React components
      // expect a style object
      style: 0,
      // Keep it in the whitelist because it is case-sensitive for SVG.
      tabIndex: 0,
      // itemScope is for for Microdata support.
      // See http://schema.org/docs/gs.html
      itemScope: HAS_BOOLEAN_VALUE,
      // These attributes must stay in the white-list because they have
      // different attribute names (see DOMAttributeNames below)
      acceptCharset: 0,
      className: 0,
      htmlFor: 0,
      httpEquiv: 0,
      // Attributes with mutation methods must be specified in the whitelist
      // Set the string boolean flag to allow the behavior
      value: HAS_STRING_BOOLEAN_VALUE
    },
    DOMAttributeNames: {
      acceptCharset: 'accept-charset',
      className: 'class',
      htmlFor: 'for',
      httpEquiv: 'http-equiv'
    },
    DOMMutationMethods: {
      value: function (node, value) {
        if (value == null) {
          return node.removeAttribute('value');
        }
  
        // Number inputs get special treatment due to some edge cases in
        // Chrome. Let everything else assign the value attribute as normal.
        // https://github.com/facebook/react/issues/7253#issuecomment-236074326
        if (node.type !== 'number' || node.hasAttribute('value') === false) {
          node.setAttribute('value', '' + value);
        } else if (node.validity && !node.validity.badInput && node.ownerDocument.activeElement !== node) {
          // Don't assign an attribute if validation reports bad
          // input. Chrome will clear the value. Additionally, don't
          // operate on inputs that have focus, otherwise Chrome might
          // strip off trailing decimal places and cause the user's
          // cursor position to jump to the beginning of the input.
          //
          // In ReactDOMInput, we have an onBlur event that will trigger
          // this function again when focus is lost.
          node.setAttribute('value', '' + value);
        }
      }
    }
  };
  
  var HAS_STRING_BOOLEAN_VALUE$1 = injection.HAS_STRING_BOOLEAN_VALUE;
  
  
  var NS = {
    xlink: 'http://www.w3.org/1999/xlink',
    xml: 'http://www.w3.org/XML/1998/namespace'
  };
  
  /**
   * This is a list of all SVG attributes that need special casing,
   * namespacing, or boolean value assignment.
   *
   * When adding attributes to this list, be sure to also add them to
   * the `possibleStandardNames` module to ensure casing and incorrect
   * name warnings.
   *
   * SVG Attributes List:
   * https://www.w3.org/TR/SVG/attindex.html
   * SMIL Spec:
   * https://www.w3.org/TR/smil
   */
  var ATTRS = ['accent-height', 'alignment-baseline', 'arabic-form', 'baseline-shift', 'cap-height', 'clip-path', 'clip-rule', 'color-interpolation', 'color-interpolation-filters', 'color-profile', 'color-rendering', 'dominant-baseline', 'enable-background', 'fill-opacity', 'fill-rule', 'flood-color', 'flood-opacity', 'font-family', 'font-size', 'font-size-adjust', 'font-stretch', 'font-style', 'font-variant', 'font-weight', 'glyph-name', 'glyph-orientation-horizontal', 'glyph-orientation-vertical', 'horiz-adv-x', 'horiz-origin-x', 'image-rendering', 'letter-spacing', 'lighting-color', 'marker-end', 'marker-mid', 'marker-start', 'overline-position', 'overline-thickness', 'paint-order', 'panose-1', 'pointer-events', 'rendering-intent', 'shape-rendering', 'stop-color', 'stop-opacity', 'strikethrough-position', 'strikethrough-thickness', 'stroke-dasharray', 'stroke-dashoffset', 'stroke-linecap', 'stroke-linejoin', 'stroke-miterlimit', 'stroke-opacity', 'stroke-width', 'text-anchor', 'text-decoration', 'text-rendering', 'underline-position', 'underline-thickness', 'unicode-bidi', 'unicode-range', 'units-per-em', 'v-alphabetic', 'v-hanging', 'v-ideographic', 'v-mathematical', 'vector-effect', 'vert-adv-y', 'vert-origin-x', 'vert-origin-y', 'word-spacing', 'writing-mode', 'x-height', 'xlink:actuate', 'xlink:arcrole', 'xlink:href', 'xlink:role', 'xlink:show', 'xlink:title', 'xlink:type', 'xml:base', 'xmlns:xlink', 'xml:lang', 'xml:space'];
  
  var SVGDOMPropertyConfig = {
    Properties: {
      autoReverse: HAS_STRING_BOOLEAN_VALUE$1,
      externalResourcesRequired: HAS_STRING_BOOLEAN_VALUE$1,
      preserveAlpha: HAS_STRING_BOOLEAN_VALUE$1
    },
    DOMAttributeNames: {
      autoReverse: 'autoReverse',
      externalResourcesRequired: 'externalResourcesRequired',
      preserveAlpha: 'preserveAlpha'
    },
    DOMAttributeNamespaces: {
      xlinkActuate: NS.xlink,
      xlinkArcrole: NS.xlink,
      xlinkHref: NS.xlink,
      xlinkRole: NS.xlink,
      xlinkShow: NS.xlink,
      xlinkTitle: NS.xlink,
      xlinkType: NS.xlink,
      xmlBase: NS.xml,
      xmlLang: NS.xml,
      xmlSpace: NS.xml
    }
  };
  
  var CAMELIZE = /[\-\:]([a-z])/g;
  var capitalize = function (token) {
    return token[1].toUpperCase();
  };
  
  ATTRS.forEach(function (original) {
    var reactName = original.replace(CAMELIZE, capitalize);
  
    SVGDOMPropertyConfig.Properties[reactName] = 0;
    SVGDOMPropertyConfig.DOMAttributeNames[reactName] = original;
  });
  
  injection.injectDOMPropertyConfig(HTMLDOMPropertyConfig);
  injection.injectDOMPropertyConfig(SVGDOMPropertyConfig);
  
  var ReactErrorUtils = {
    // Used by Fiber to simulate a try-catch.
    _caughtError: null,
    _hasCaughtError: false,
  
    // Used by event system to capture/rethrow the first error.
    _rethrowError: null,
    _hasRethrowError: false,
  
    injection: {
      injectErrorUtils: function (injectedErrorUtils) {
        !(typeof injectedErrorUtils.invokeGuardedCallback === 'function') ? invariant_1$1(false, 'Injected invokeGuardedCallback() must be a function.') : void 0;
        invokeGuardedCallback = injectedErrorUtils.invokeGuardedCallback;
      }
    },
  
    /**
     * Call a function while guarding against errors that happens within it.
     * Returns an error if it throws, otherwise null.
     *
     * In production, this is implemented using a try-catch. The reason we don't
     * use a try-catch directly is so that we can swap out a different
     * implementation in DEV mode.
     *
     * @param {String} name of the guard to use for logging or debugging
     * @param {Function} func The function to invoke
     * @param {*} context The context to use when calling the function
     * @param {...*} args Arguments for function
     */
    invokeGuardedCallback: function (name, func, context, a, b, c, d, e, f) {
      invokeGuardedCallback.apply(ReactErrorUtils, arguments);
    },
  
    /**
     * Same as invokeGuardedCallback, but instead of returning an error, it stores
     * it in a global so it can be rethrown by `rethrowCaughtError` later.
     * TODO: See if _caughtError and _rethrowError can be unified.
     *
     * @param {String} name of the guard to use for logging or debugging
     * @param {Function} func The function to invoke
     * @param {*} context The context to use when calling the function
     * @param {...*} args Arguments for function
     */
    invokeGuardedCallbackAndCatchFirstError: function (name, func, context, a, b, c, d, e, f) {
      ReactErrorUtils.invokeGuardedCallback.apply(this, arguments);
      if (ReactErrorUtils.hasCaughtError()) {
        var error = ReactErrorUtils.clearCaughtError();
        if (!ReactErrorUtils._hasRethrowError) {
          ReactErrorUtils._hasRethrowError = true;
          ReactErrorUtils._rethrowError = error;
        }
      }
    },
  
    /**
     * During execution of guarded functions we will capture the first error which
     * we will rethrow to be handled by the top level error handler.
     */
    rethrowCaughtError: function () {
      return rethrowCaughtError.apply(ReactErrorUtils, arguments);
    },
  
    hasCaughtError: function () {
      return ReactErrorUtils._hasCaughtError;
    },
  
    clearCaughtError: function () {
      if (ReactErrorUtils._hasCaughtError) {
        var error = ReactErrorUtils._caughtError;
        ReactErrorUtils._caughtError = null;
        ReactErrorUtils._hasCaughtError = false;
        return error;
      } else {
        invariant_1$1(false, 'clearCaughtError was called but no error was captured. This error is likely caused by a bug in React. Please file an issue.');
      }
    }
  };
  
  var invokeGuardedCallback = function (name, func, context, a, b, c, d, e, f) {
    ReactErrorUtils._hasCaughtError = false;
    ReactErrorUtils._caughtError = null;
    var funcArgs = Array.prototype.slice.call(arguments, 3);
    try {
      func.apply(context, funcArgs);
    } catch (error) {
      ReactErrorUtils._caughtError = error;
      ReactErrorUtils._hasCaughtError = true;
    }
  };
  
  {
    // In DEV mode, we swap out invokeGuardedCallback for a special version
    // that plays more nicely with the browser's DevTools. The idea is to preserve
    // "Pause on exceptions" behavior. Because React wraps all user-provided
    // functions in invokeGuardedCallback, and the production version of
    // invokeGuardedCallback uses a try-catch, all user exceptions are treated
    // like caught exceptions, and the DevTools won't pause unless the developer
    // takes the extra step of enabling pause on caught exceptions. This is
    // untintuitive, though, because even though React has caught the error, from
    // the developer's perspective, the error is uncaught.
    //
    // To preserve the expected "Pause on exceptions" behavior, we don't use a
    // try-catch in DEV. Instead, we synchronously dispatch a fake event to a fake
    // DOM node, and call the user-provided callback from inside an event handler
    // for that fake event. If the callback throws, the error is "captured" using
    // a global event handler. But because the error happens in a different
    // event loop context, it does not interrupt the normal program flow.
    // Effectively, this gives us try-catch behavior without actually using
    // try-catch. Neat!
  
    // Check that the browser supports the APIs we need to implement our special
    // DEV version of invokeGuardedCallback
    if (typeof window !== 'undefined' && typeof window.dispatchEvent === 'function' && typeof document !== 'undefined' && typeof document.createEvent === 'function') {
      var fakeNode = document.createElement('react');
  
      var invokeGuardedCallbackDev = function (name, func, context, a, b, c, d, e, f) {
        // Keeps track of whether the user-provided callback threw an error. We
        // set this to true at the beginning, then set it to false right after
        // calling the function. If the function errors, `didError` will never be
        // set to false. This strategy works even if the browser is flaky and
        // fails to call our global error handler, because it doesn't rely on
        // the error event at all.
        var didError = true;
  
        // Create an event handler for our fake event. We will synchronously
        // dispatch our fake event using `dispatchEvent`. Inside the handler, we
        // call the user-provided callback.
        var funcArgs = Array.prototype.slice.call(arguments, 3);
        function callCallback() {
          // We immediately remove the callback from event listeners so that
          // nested `invokeGuardedCallback` calls do not clash. Otherwise, a
          // nested call would trigger the fake event handlers of any call higher
          // in the stack.
          fakeNode.removeEventListener(evtType, callCallback, false);
          func.apply(context, funcArgs);
          didError = false;
        }
  
        // Create a global error event handler. We use this to capture the value
        // that was thrown. It's possible that this error handler will fire more
        // than once; for example, if non-React code also calls `dispatchEvent`
        // and a handler for that event throws. We should be resilient to most of
        // those cases. Even if our error event handler fires more than once, the
        // last error event is always used. If the callback actually does error,
        // we know that the last error event is the correct one, because it's not
        // possible for anything else to have happened in between our callback
        // erroring and the code that follows the `dispatchEvent` call below. If
        // the callback doesn't error, but the error event was fired, we know to
        // ignore it because `didError` will be false, as described above.
        var error = void 0;
        // Use this to track whether the error event is ever called.
        var didSetError = false;
        var isCrossOriginError = false;
  
        function onError(event) {
          error = event.error;
          didSetError = true;
          if (error === null && event.colno === 0 && event.lineno === 0) {
            isCrossOriginError = true;
          }
        }
  
        // Create a fake event type.
        var evtType = 'react-' + (name ? name : 'invokeguardedcallback');
  
        // Attach our event handlers
        window.addEventListener('error', onError);
        fakeNode.addEventListener(evtType, callCallback, false);
  
        // Synchronously dispatch our fake event. If the user-provided function
        // errors, it will trigger our global error handler.
        var evt = document.createEvent('Event');
        evt.initEvent(evtType, false, false);
        fakeNode.dispatchEvent(evt);
  
        if (didError) {
          if (!didSetError) {
            // The callback errored, but the error event never fired.
            error = new Error('An error was thrown inside one of your components, but React ' + "doesn't know what it was. This is likely due to browser " + 'flakiness. React does its best to preserve the "Pause on ' + 'exceptions" behavior of the DevTools, which requires some ' + "DEV-mode only tricks. It's possible that these don't work in " + 'your browser. Try triggering the error in production mode, ' + 'or switching to a modern browser. If you suspect that this is ' + 'actually an issue with React, please file an issue.');
          } else if (isCrossOriginError) {
            error = new Error("A cross-origin error was thrown. React doesn't have access to " + 'the actual error object in development. ' + 'See https://fb.me/react-crossorigin-error for more information.');
          }
          ReactErrorUtils._hasCaughtError = true;
          ReactErrorUtils._caughtError = error;
        } else {
          ReactErrorUtils._hasCaughtError = false;
          ReactErrorUtils._caughtError = null;
        }
  
        // Remove our event listeners
        window.removeEventListener('error', onError);
      };
  
      invokeGuardedCallback = invokeGuardedCallbackDev;
    }
  }
  
  var rethrowCaughtError = function () {
    if (ReactErrorUtils._hasRethrowError) {
      var error = ReactErrorUtils._rethrowError;
      ReactErrorUtils._rethrowError = null;
      ReactErrorUtils._hasRethrowError = false;
      throw error;
    }
  };
  
  /**
   * Injectable ordering of event plugins.
   */
  var eventPluginOrder = null;
  
  /**
   * Injectable mapping from names to event plugin modules.
   */
  var namesToPlugins = {};
  
  /**
   * Recomputes the plugin list using the injected plugins and plugin ordering.
   *
   * @private
   */
  function recomputePluginOrdering() {
    if (!eventPluginOrder) {
      // Wait until an `eventPluginOrder` is injected.
      return;
    }
    for (var pluginName in namesToPlugins) {
      var pluginModule = namesToPlugins[pluginName];
      var pluginIndex = eventPluginOrder.indexOf(pluginName);
      !(pluginIndex > -1) ? invariant_1$1(false, 'EventPluginRegistry: Cannot inject event plugins that do not exist in the plugin ordering, `%s`.', pluginName) : void 0;
      if (plugins[pluginIndex]) {
        continue;
      }
      !pluginModule.extractEvents ? invariant_1$1(false, 'EventPluginRegistry: Event plugins must implement an `extractEvents` method, but `%s` does not.', pluginName) : void 0;
      plugins[pluginIndex] = pluginModule;
      var publishedEvents = pluginModule.eventTypes;
      for (var eventName in publishedEvents) {
        !publishEventForPlugin(publishedEvents[eventName], pluginModule, eventName) ? invariant_1$1(false, 'EventPluginRegistry: Failed to publish event `%s` for plugin `%s`.', eventName, pluginName) : void 0;
      }
    }
  }
  
  /**
   * Publishes an event so that it can be dispatched by the supplied plugin.
   *
   * @param {object} dispatchConfig Dispatch configuration for the event.
   * @param {object} PluginModule Plugin publishing the event.
   * @return {boolean} True if the event was successfully published.
   * @private
   */
  function publishEventForPlugin(dispatchConfig, pluginModule, eventName) {
    !!eventNameDispatchConfigs.hasOwnProperty(eventName) ? invariant_1$1(false, 'EventPluginHub: More than one plugin attempted to publish the same event name, `%s`.', eventName) : void 0;
    eventNameDispatchConfigs[eventName] = dispatchConfig;
  
    var phasedRegistrationNames = dispatchConfig.phasedRegistrationNames;
    if (phasedRegistrationNames) {
      for (var phaseName in phasedRegistrationNames) {
        if (phasedRegistrationNames.hasOwnProperty(phaseName)) {
          var phasedRegistrationName = phasedRegistrationNames[phaseName];
          publishRegistrationName(phasedRegistrationName, pluginModule, eventName);
        }
      }
      return true;
    } else if (dispatchConfig.registrationName) {
      publishRegistrationName(dispatchConfig.registrationName, pluginModule, eventName);
      return true;
    }
    return false;
  }
  
  /**
   * Publishes a registration name that is used to identify dispatched events.
   *
   * @param {string} registrationName Registration name to add.
   * @param {object} PluginModule Plugin publishing the event.
   * @private
   */
  function publishRegistrationName(registrationName, pluginModule, eventName) {
    !!registrationNameModules[registrationName] ? invariant_1$1(false, 'EventPluginHub: More than one plugin attempted to publish the same registration name, `%s`.', registrationName) : void 0;
    registrationNameModules[registrationName] = pluginModule;
    registrationNameDependencies[registrationName] = pluginModule.eventTypes[eventName].dependencies;
  
    {
      var lowerCasedName = registrationName.toLowerCase();
      possibleRegistrationNames[lowerCasedName] = registrationName;
  
      if (registrationName === 'onDoubleClick') {
        possibleRegistrationNames.ondblclick = registrationName;
      }
    }
  }
  
  /**
   * Registers plugins so that they can extract and dispatch events.
   *
   * @see {EventPluginHub}
   */
  
  /**
   * Ordered list of injected plugins.
   */
  var plugins = [];
  
  /**
   * Mapping from event name to dispatch config
   */
  var eventNameDispatchConfigs = {};
  
  /**
   * Mapping from registration name to plugin module
   */
  var registrationNameModules = {};
  
  /**
   * Mapping from registration name to event name
   */
  var registrationNameDependencies = {};
  
  /**
   * Mapping from lowercase registration names to the properly cased version,
   * used to warn in the case of missing event handlers. Available
   * only in true.
   * @type {Object}
   */
  var possibleRegistrationNames = {};
  // Trust the developer to only use possibleRegistrationNames in true
  
  /**
   * Injects an ordering of plugins (by plugin name). This allows the ordering
   * to be decoupled from injection of the actual plugins so that ordering is
   * always deterministic regardless of packaging, on-the-fly injection, etc.
   *
   * @param {array} InjectedEventPluginOrder
   * @internal
   * @see {EventPluginHub.injection.injectEventPluginOrder}
   */
  function injectEventPluginOrder(injectedEventPluginOrder) {
    !!eventPluginOrder ? invariant_1$1(false, 'EventPluginRegistry: Cannot inject event plugin ordering more than once. You are likely trying to load more than one copy of React.') : void 0;
    // Clone the ordering so it cannot be dynamically mutated.
    eventPluginOrder = Array.prototype.slice.call(injectedEventPluginOrder);
    recomputePluginOrdering();
  }
  
  /**
   * Injects plugins to be used by `EventPluginHub`. The plugin names must be
   * in the ordering injected by `injectEventPluginOrder`.
   *
   * Plugins can be injected as part of page initialization or on-the-fly.
   *
   * @param {object} injectedNamesToPlugins Map from names to plugin modules.
   * @internal
   * @see {EventPluginHub.injection.injectEventPluginsByName}
   */
  function injectEventPluginsByName(injectedNamesToPlugins) {
    var isOrderingDirty = false;
    for (var pluginName in injectedNamesToPlugins) {
      if (!injectedNamesToPlugins.hasOwnProperty(pluginName)) {
        continue;
      }
      var pluginModule = injectedNamesToPlugins[pluginName];
      if (!namesToPlugins.hasOwnProperty(pluginName) || namesToPlugins[pluginName] !== pluginModule) {
        !!namesToPlugins[pluginName] ? invariant_1$1(false, 'EventPluginRegistry: Cannot inject two different event plugins using the same name, `%s`.', pluginName) : void 0;
        namesToPlugins[pluginName] = pluginModule;
        isOrderingDirty = true;
      }
    }
    if (isOrderingDirty) {
      recomputePluginOrdering();
    }
  }
  
  var EventPluginRegistry = Object.freeze({
  	plugins: plugins,
  	eventNameDispatchConfigs: eventNameDispatchConfigs,
  	registrationNameModules: registrationNameModules,
  	registrationNameDependencies: registrationNameDependencies,
  	possibleRegistrationNames: possibleRegistrationNames,
  	injectEventPluginOrder: injectEventPluginOrder,
  	injectEventPluginsByName: injectEventPluginsByName
  });
  
  /**
   * Copyright (c) 2013-present, Facebook, Inc.
   *
   * This source code is licensed under the MIT license found in the
   * LICENSE file in the root directory of this source tree.
   *
   * 
   */
  
  function makeEmptyFunction(arg) {
    return function () {
      return arg;
    };
  }
  
  /**
   * This function accepts and discards inputs; it has no side effects. This is
   * primarily useful idiomatically for overridable function endpoints which
   * always need to be callable, since JS lacks a null-call idiom ala Cocoa.
   */
  var emptyFunction$1 = function emptyFunction() {};
  
  emptyFunction$1.thatReturns = makeEmptyFunction;
  emptyFunction$1.thatReturnsFalse = makeEmptyFunction(false);
  emptyFunction$1.thatReturnsTrue = makeEmptyFunction(true);
  emptyFunction$1.thatReturnsNull = makeEmptyFunction(null);
  emptyFunction$1.thatReturnsThis = function () {
    return this;
  };
  emptyFunction$1.thatReturnsArgument = function (arg) {
    return arg;
  };
  
  var emptyFunction_1 = emptyFunction$1;
  
  /**
   * Copyright (c) 2014-present, Facebook, Inc.
   *
   * This source code is licensed under the MIT license found in the
   * LICENSE file in the root directory of this source tree.
   *
   */
  
  
  
  
  
  /**
   * Similar to invariant but only logs a warning if the condition is not met.
   * This can be used to log issues in development environments in critical
   * paths. Removing the logging code for production environments will keep the
   * same logic and follow the same code paths.
   */
  
  var warning = emptyFunction_1;
  
  {
    var printWarning = function printWarning(format) {
      for (var _len = arguments.length, args = Array(_len > 1 ? _len - 1 : 0), _key = 1; _key < _len; _key++) {
        args[_key - 1] = arguments[_key];
      }
  
      var argIndex = 0;
      var message = 'Warning: ' + format.replace(/%s/g, function () {
        return args[argIndex++];
      });
      if (typeof console !== 'undefined') {
        console.error(message);
      }
      try {
        // --- Welcome to debugging React ---
        // This error was thrown as a convenience so that you can use this stack
        // to find the callsite that caused this warning to fire.
        throw new Error(message);
      } catch (x) {}
    };
  
    warning = function warning(condition, format) {
      if (format === undefined) {
        throw new Error('`warning(condition, format, ...args)` requires a warning ' + 'message argument');
      }
  
      if (format.indexOf('Failed Composite propType: ') === 0) {
        return; // Ignore CompositeComponent proptype check.
      }
  
      if (!condition) {
        for (var _len2 = arguments.length, args = Array(_len2 > 2 ? _len2 - 2 : 0), _key2 = 2; _key2 < _len2; _key2++) {
          args[_key2 - 2] = arguments[_key2];
        }
  
        printWarning.apply(undefined, [format].concat(args));
      }
    };
  }
  
  var warning_1$1 = warning;
  
  var getFiberCurrentPropsFromNode = null;
  var getInstanceFromNode = null;
  var getNodeFromInstance = null;
  
  var injection$2 = {
    injectComponentTree: function (Injected) {
      getFiberCurrentPropsFromNode = Injected.getFiberCurrentPropsFromNode;
      getInstanceFromNode = Injected.getInstanceFromNode;
      getNodeFromInstance = Injected.getNodeFromInstance;
  
      {
        warning_1$1(getNodeFromInstance && getInstanceFromNode, 'EventPluginUtils.injection.injectComponentTree(...): Injected ' + 'module is missing getNodeFromInstance or getInstanceFromNode.');
      }
    }
  };
  
  
  
  
  
  
  var validateEventDispatches;
  {
    validateEventDispatches = function (event) {
      var dispatchListeners = event._dispatchListeners;
      var dispatchInstances = event._dispatchInstances;
  
      var listenersIsArr = Array.isArray(dispatchListeners);
      var listenersLen = listenersIsArr ? dispatchListeners.length : dispatchListeners ? 1 : 0;
  
      var instancesIsArr = Array.isArray(dispatchInstances);
      var instancesLen = instancesIsArr ? dispatchInstances.length : dispatchInstances ? 1 : 0;
  
      warning_1$1(instancesIsArr === listenersIsArr && instancesLen === listenersLen, 'EventPluginUtils: Invalid `event`.');
    };
  }
  
  /**
   * Dispatch the event to the listener.
   * @param {SyntheticEvent} event SyntheticEvent to handle
   * @param {boolean} simulated If the event is simulated (changes exn behavior)
   * @param {function} listener Application-level callback
   * @param {*} inst Internal component instance
   */
  function executeDispatch(event, simulated, listener, inst) {
    var type = event.type || 'unknown-event';
    event.currentTarget = getNodeFromInstance(inst);
    ReactErrorUtils.invokeGuardedCallbackAndCatchFirstError(type, listener, undefined, event);
    event.currentTarget = null;
  }
  
  /**
   * Standard/simple iteration through an event's collected dispatches.
   */
  function executeDispatchesInOrder(event, simulated) {
    var dispatchListeners = event._dispatchListeners;
    var dispatchInstances = event._dispatchInstances;
    {
      validateEventDispatches(event);
    }
    if (Array.isArray(dispatchListeners)) {
      for (var i = 0; i < dispatchListeners.length; i++) {
        if (event.isPropagationStopped()) {
          break;
        }
        // Listeners and Instances are two parallel arrays that are always in sync.
        executeDispatch(event, simulated, dispatchListeners[i], dispatchInstances[i]);
      }
    } else if (dispatchListeners) {
      executeDispatch(event, simulated, dispatchListeners, dispatchInstances);
    }
    event._dispatchListeners = null;
    event._dispatchInstances = null;
  }
  
  /**
   * @see executeDispatchesInOrderStopAtTrueImpl
   */
  
  
  /**
   * Execution of a "direct" dispatch - there must be at most one dispatch
   * accumulated on the event or it is considered an error. It doesn't really make
   * sense for an event with multiple dispatches (bubbled) to keep track of the
   * return values at each dispatch execution, but it does tend to make sense when
   * dealing with "direct" dispatches.
   *
   * @return {*} The return value of executing the single dispatch.
   */
  
  
  /**
   * @param {SyntheticEvent} event
   * @return {boolean} True iff number of dispatches accumulated is greater than 0.
   */
  
  /**
   * Accumulates items that must not be null or undefined into the first one. This
   * is used to conserve memory by avoiding array allocations, and thus sacrifices
   * API cleanness. Since `current` can be null before being passed in and not
   * null after this function, make sure to assign it back to `current`:
   *
   * `a = accumulateInto(a, b);`
   *
   * This API should be sparingly used. Try `accumulate` for something cleaner.
   *
   * @return {*|array<*>} An accumulation of items.
   */
  
  function accumulateInto(current, next) {
    !(next != null) ? invariant_1$1(false, 'accumulateInto(...): Accumulated items must not be null or undefined.') : void 0;
  
    if (current == null) {
      return next;
    }
  
    // Both are not empty. Warning: Never call x.concat(y) when you are not
    // certain that x is an Array (x could be a string with concat method).
    if (Array.isArray(current)) {
      if (Array.isArray(next)) {
        current.push.apply(current, next);
        return current;
      }
      current.push(next);
      return current;
    }
  
    if (Array.isArray(next)) {
      // A bit too dangerous to mutate `next`.
      return [current].concat(next);
    }
  
    return [current, next];
  }
  
  /**
   * @param {array} arr an "accumulation" of items which is either an Array or
   * a single item. Useful when paired with the `accumulate` module. This is a
   * simple utility that allows us to reason about a collection of items, but
   * handling the case when there is exactly one item (and we do not need to
   * allocate an array).
   * @param {function} cb Callback invoked with each element or a collection.
   * @param {?} [scope] Scope used as `this` in a callback.
   */
  function forEachAccumulated(arr, cb, scope) {
    if (Array.isArray(arr)) {
      arr.forEach(cb, scope);
    } else if (arr) {
      cb.call(scope, arr);
    }
  }
  
  /**
   * Internal queue of events that have accumulated their dispatches and are
   * waiting to have their dispatches executed.
   */
  var eventQueue = null;
  
  /**
   * Dispatches an event and releases it back into the pool, unless persistent.
   *
   * @param {?object} event Synthetic event to be dispatched.
   * @param {boolean} simulated If the event is simulated (changes exn behavior)
   * @private
   */
  var executeDispatchesAndRelease = function (event, simulated) {
    if (event) {
      executeDispatchesInOrder(event, simulated);
  
      if (!event.isPersistent()) {
        event.constructor.release(event);
      }
    }
  };
  var executeDispatchesAndReleaseSimulated = function (e) {
    return executeDispatchesAndRelease(e, true);
  };
  var executeDispatchesAndReleaseTopLevel = function (e) {
    return executeDispatchesAndRelease(e, false);
  };
  
  function isInteractive(tag) {
    return tag === 'button' || tag === 'input' || tag === 'select' || tag === 'textarea';
  }
  
  function shouldPreventMouseEvent(name, type, props) {
    switch (name) {
      case 'onClick':
      case 'onClickCapture':
      case 'onDoubleClick':
      case 'onDoubleClickCapture':
      case 'onMouseDown':
      case 'onMouseDownCapture':
      case 'onMouseMove':
      case 'onMouseMoveCapture':
      case 'onMouseUp':
      case 'onMouseUpCapture':
        return !!(props.disabled && isInteractive(type));
      default:
        return false;
    }
  }
  
  /**
   * This is a unified interface for event plugins to be installed and configured.
   *
   * Event plugins can implement the following properties:
   *
   *   `extractEvents` {function(string, DOMEventTarget, string, object): *}
   *     Required. When a top-level event is fired, this method is expected to
   *     extract synthetic events that will in turn be queued and dispatched.
   *
   *   `eventTypes` {object}
   *     Optional, plugins that fire events must publish a mapping of registration
   *     names that are used to register listeners. Values of this mapping must
   *     be objects that contain `registrationName` or `phasedRegistrationNames`.
   *
   *   `executeDispatch` {function(object, function, string)}
   *     Optional, allows plugins to override how an event gets dispatched. By
   *     default, the listener is simply invoked.
   *
   * Each plugin that is injected into `EventsPluginHub` is immediately operable.
   *
   * @public
   */
  
  /**
   * Methods for injecting dependencies.
   */
  var injection$1 = {
    /**
     * @param {array} InjectedEventPluginOrder
     * @public
     */
    injectEventPluginOrder: injectEventPluginOrder,
  
    /**
     * @param {object} injectedNamesToPlugins Map from names to plugin modules.
     */
    injectEventPluginsByName: injectEventPluginsByName
  };
  
  /**
   * @param {object} inst The instance, which is the source of events.
   * @param {string} registrationName Name of listener (e.g. `onClick`).
   * @return {?function} The stored callback.
   */
  function getListener(inst, registrationName) {
    var listener;
  
    // TODO: shouldPreventMouseEvent is DOM-specific and definitely should not
    // live here; needs to be moved to a better place soon
    var stateNode = inst.stateNode;
    if (!stateNode) {
      // Work in progress (ex: onload events in incremental mode).
      return null;
    }
    var props = getFiberCurrentPropsFromNode(stateNode);
    if (!props) {
      // Work in progress.
      return null;
    }
    listener = props[registrationName];
    if (shouldPreventMouseEvent(registrationName, inst.type, props)) {
      return null;
    }
    !(!listener || typeof listener === 'function') ? invariant_1$1(false, 'Expected `%s` listener to be a function, instead got a value of `%s` type.', registrationName, typeof listener) : void 0;
    return listener;
  }
  
  /**
   * Allows registered plugins an opportunity to extract events from top-level
   * native browser events.
   *
   * @return {*} An accumulation of synthetic events.
   * @internal
   */
  function extractEvents(topLevelType, targetInst, nativeEvent, nativeEventTarget) {
    var events;
    for (var i = 0; i < plugins.length; i++) {
      // Not every plugin in the ordering may be loaded at runtime.
      var possiblePlugin = plugins[i];
      if (possiblePlugin) {
        var extractedEvents = possiblePlugin.extractEvents(topLevelType, targetInst, nativeEvent, nativeEventTarget);
        if (extractedEvents) {
          events = accumulateInto(events, extractedEvents);
        }
      }
    }
    return events;
  }
  
  /**
   * Enqueues a synthetic event that should be dispatched when
   * `processEventQueue` is invoked.
   *
   * @param {*} events An accumulation of synthetic events.
   * @internal
   */
  function enqueueEvents(events) {
    if (events) {
      eventQueue = accumulateInto(eventQueue, events);
    }
  }
  
  /**
   * Dispatches all synthetic events on the event queue.
   *
   * @internal
   */
  function processEventQueue(simulated) {
    // Set `eventQueue` to null before processing it so that we can tell if more
    // events get enqueued while processing.
    var processingEventQueue = eventQueue;
    eventQueue = null;
    if (simulated) {
      forEachAccumulated(processingEventQueue, executeDispatchesAndReleaseSimulated);
    } else {
      forEachAccumulated(processingEventQueue, executeDispatchesAndReleaseTopLevel);
    }
    !!eventQueue ? invariant_1$1(false, 'processEventQueue(): Additional events were enqueued while processing an event queue. Support for this has not yet been implemented.') : void 0;
    // This would be a good time to rethrow if any of the event handlers threw.
    ReactErrorUtils.rethrowCaughtError();
  }
  
  var EventPluginHub = Object.freeze({
  	injection: injection$1,
  	getListener: getListener,
  	extractEvents: extractEvents,
  	enqueueEvents: enqueueEvents,
  	processEventQueue: processEventQueue
  });
  
  var IndeterminateComponent = 0; // Before we know whether it is functional or class
  var FunctionalComponent = 1;
  var ClassComponent = 2;
  var HostRoot = 3; // Root of a host tree. Could be nested inside another node.
  var HostPortal = 4; // A subtree. Could be an entry point to a different renderer.
  var HostComponent = 5;
  var HostText = 6;
  var CallComponent = 7;
  var CallHandlerPhase = 8;
  var ReturnComponent = 9;
  var Fragment = 10;
  
  var randomKey = Math.random().toString(36).slice(2);
  var internalInstanceKey = '__reactInternalInstance$' + randomKey;
  var internalEventHandlersKey = '__reactEventHandlers$' + randomKey;
  
  function precacheFiberNode$1(hostInst, node) {
    node[internalInstanceKey] = hostInst;
  }
  
  /**
   * Given a DOM node, return the closest ReactDOMComponent or
   * ReactDOMTextComponent instance ancestor.
   */
  function getClosestInstanceFromNode(node) {
    if (node[internalInstanceKey]) {
      return node[internalInstanceKey];
    }
  
    // Walk up the tree until we find an ancestor whose instance we have cached.
    var parents = [];
    while (!node[internalInstanceKey]) {
      parents.push(node);
      if (node.parentNode) {
        node = node.parentNode;
      } else {
        // Top of the tree. This node must not be part of a React tree (or is
        // unmounted, potentially).
        return null;
      }
    }
  
    var closest = void 0;
    var inst = node[internalInstanceKey];
    if (inst.tag === HostComponent || inst.tag === HostText) {
      // In Fiber, this will always be the deepest root.
      return inst;
    }
    for (; node && (inst = node[internalInstanceKey]); node = parents.pop()) {
      closest = inst;
    }
  
    return closest;
  }
  
  /**
   * Given a DOM node, return the ReactDOMComponent or ReactDOMTextComponent
   * instance, or null if the node was not rendered by this React.
   */
  function getInstanceFromNode$1(node) {
    var inst = node[internalInstanceKey];
    if (inst) {
      if (inst.tag === HostComponent || inst.tag === HostText) {
        return inst;
      } else {
        return null;
      }
    }
    return null;
  }
  
  /**
   * Given a ReactDOMComponent or ReactDOMTextComponent, return the corresponding
   * DOM node.
   */
  function getNodeFromInstance$1(inst) {
    if (inst.tag === HostComponent || inst.tag === HostText) {
      // In Fiber this, is just the state node right now. We assume it will be
      // a host component or host text.
      return inst.stateNode;
    }
  
    // Without this first invariant, passing a non-DOM-component triggers the next
    // invariant for a missing parent, which is super confusing.
    invariant_1$1(false, 'getNodeFromInstance: Invalid argument.');
  }
  
  function getFiberCurrentPropsFromNode$1(node) {
    return node[internalEventHandlersKey] || null;
  }
  
  function updateFiberProps$1(node, props) {
    node[internalEventHandlersKey] = props;
  }
  
  var ReactDOMComponentTree = Object.freeze({
  	precacheFiberNode: precacheFiberNode$1,
  	getClosestInstanceFromNode: getClosestInstanceFromNode,
  	getInstanceFromNode: getInstanceFromNode$1,
  	getNodeFromInstance: getNodeFromInstance$1,
  	getFiberCurrentPropsFromNode: getFiberCurrentPropsFromNode$1,
  	updateFiberProps: updateFiberProps$1
  });
  
  function getParent(inst) {
    do {
      inst = inst['return'];
      // TODO: If this is a HostRoot we might want to bail out.
      // That is depending on if we want nested subtrees (layers) to bubble
      // events to their parent. We could also go through parentNode on the
      // host node but that wouldn't work for React Native and doesn't let us
      // do the portal feature.
    } while (inst && inst.tag !== HostComponent);
    if (inst) {
      return inst;
    }
    return null;
  }
  
  /**
   * Return the lowest common ancestor of A and B, or null if they are in
   * different trees.
   */
  function getLowestCommonAncestor(instA, instB) {
    var depthA = 0;
    for (var tempA = instA; tempA; tempA = getParent(tempA)) {
      depthA++;
    }
    var depthB = 0;
    for (var tempB = instB; tempB; tempB = getParent(tempB)) {
      depthB++;
    }
  
    // If A is deeper, crawl up.
    while (depthA - depthB > 0) {
      instA = getParent(instA);
      depthA--;
    }
  
    // If B is deeper, crawl up.
    while (depthB - depthA > 0) {
      instB = getParent(instB);
      depthB--;
    }
  
    // Walk in lockstep until we find a match.
    var depth = depthA;
    while (depth--) {
      if (instA === instB || instA === instB.alternate) {
        return instA;
      }
      instA = getParent(instA);
      instB = getParent(instB);
    }
    return null;
  }
  
  /**
   * Return if A is an ancestor of B.
   */
  
  
  /**
   * Return the parent instance of the passed-in instance.
   */
  function getParentInstance(inst) {
    return getParent(inst);
  }
  
  /**
   * Simulates the traversal of a two-phase, capture/bubble event dispatch.
   */
  function traverseTwoPhase(inst, fn, arg) {
    var path = [];
    while (inst) {
      path.push(inst);
      inst = getParent(inst);
    }
    var i;
    for (i = path.length; i-- > 0;) {
      fn(path[i], 'captured', arg);
    }
    for (i = 0; i < path.length; i++) {
      fn(path[i], 'bubbled', arg);
    }
  }
  
  /**
   * Traverses the ID hierarchy and invokes the supplied `cb` on any IDs that
   * should would receive a `mouseEnter` or `mouseLeave` event.
   *
   * Does not invoke the callback on the nearest common ancestor because nothing
   * "entered" or "left" that element.
   */
  function traverseEnterLeave(from, to, fn, argFrom, argTo) {
    var common = from && to ? getLowestCommonAncestor(from, to) : null;
    var pathFrom = [];
    while (true) {
      if (!from) {
        break;
      }
      if (from === common) {
        break;
      }
      var alternate = from.alternate;
      if (alternate !== null && alternate === common) {
        break;
      }
      pathFrom.push(from);
      from = getParent(from);
    }
    var pathTo = [];
    while (true) {
      if (!to) {
        break;
      }
      if (to === common) {
        break;
      }
      var _alternate = to.alternate;
      if (_alternate !== null && _alternate === common) {
        break;
      }
      pathTo.push(to);
      to = getParent(to);
    }
    for (var i = 0; i < pathFrom.length; i++) {
      fn(pathFrom[i], 'bubbled', argFrom);
    }
    for (var _i = pathTo.length; _i-- > 0;) {
      fn(pathTo[_i], 'captured', argTo);
    }
  }
  
  /**
   * Some event types have a notion of different registration names for different
   * "phases" of propagation. This finds listeners by a given phase.
   */
  function listenerAtPhase(inst, event, propagationPhase) {
    var registrationName = event.dispatchConfig.phasedRegistrationNames[propagationPhase];
    return getListener(inst, registrationName);
  }
  
  /**
   * A small set of propagation patterns, each of which will accept a small amount
   * of information, and generate a set of "dispatch ready event objects" - which
   * are sets of events that have already been annotated with a set of dispatched
   * listener functions/ids. The API is designed this way to discourage these
   * propagation strategies from actually executing the dispatches, since we
   * always want to collect the entire set of dispatches before executing even a
   * single one.
   */
  
  /**
   * Tags a `SyntheticEvent` with dispatched listeners. Creating this function
   * here, allows us to not have to bind or create functions for each event.
   * Mutating the event's members allows us to not have to create a wrapping
   * "dispatch" object that pairs the event with the listener.
   */
  function accumulateDirectionalDispatches(inst, phase, event) {
    {
      warning_1$1(inst, 'Dispatching inst must not be null');
    }
    var listener = listenerAtPhase(inst, event, phase);
    if (listener) {
      event._dispatchListeners = accumulateInto(event._dispatchListeners, listener);
      event._dispatchInstances = accumulateInto(event._dispatchInstances, inst);
    }
  }
  
  /**
   * Collect dispatches (must be entirely collected before dispatching - see unit
   * tests). Lazily allocate the array to conserve memory.  We must loop through
   * each event and perform the traversal for each one. We cannot perform a
   * single traversal for the entire collection of events because each event may
   * have a different target.
   */
  function accumulateTwoPhaseDispatchesSingle(event) {
    if (event && event.dispatchConfig.phasedRegistrationNames) {
      traverseTwoPhase(event._targetInst, accumulateDirectionalDispatches, event);
    }
  }
  
  /**
   * Same as `accumulateTwoPhaseDispatchesSingle`, but skips over the targetID.
   */
  function accumulateTwoPhaseDispatchesSingleSkipTarget(event) {
    if (event && event.dispatchConfig.phasedRegistrationNames) {
      var targetInst = event._targetInst;
      var parentInst = targetInst ? getParentInstance(targetInst) : null;
      traverseTwoPhase(parentInst, accumulateDirectionalDispatches, event);
    }
  }
  
  /**
   * Accumulates without regard to direction, does not look for phased
   * registration names. Same as `accumulateDirectDispatchesSingle` but without
   * requiring that the `dispatchMarker` be the same as the dispatched ID.
   */
  function accumulateDispatches(inst, ignoredDirection, event) {
    if (inst && event && event.dispatchConfig.registrationName) {
      var registrationName = event.dispatchConfig.registrationName;
      var listener = getListener(inst, registrationName);
      if (listener) {
        event._dispatchListeners = accumulateInto(event._dispatchListeners, listener);
        event._dispatchInstances = accumulateInto(event._dispatchInstances, inst);
      }
    }
  }
  
  /**
   * Accumulates dispatches on an `SyntheticEvent`, but only for the
   * `dispatchMarker`.
   * @param {SyntheticEvent} event
   */
  function accumulateDirectDispatchesSingle(event) {
    if (event && event.dispatchConfig.registrationName) {
      accumulateDispatches(event._targetInst, null, event);
    }
  }
  
  function accumulateTwoPhaseDispatches(events) {
    forEachAccumulated(events, accumulateTwoPhaseDispatchesSingle);
  }
  
  function accumulateTwoPhaseDispatchesSkipTarget(events) {
    forEachAccumulated(events, accumulateTwoPhaseDispatchesSingleSkipTarget);
  }
  
  function accumulateEnterLeaveDispatches(leave, enter, from, to) {
    traverseEnterLeave(from, to, accumulateDispatches, leave, enter);
  }
  
  function accumulateDirectDispatches(events) {
    forEachAccumulated(events, accumulateDirectDispatchesSingle);
  }
  
  var EventPropagators = Object.freeze({
  	accumulateTwoPhaseDispatches: accumulateTwoPhaseDispatches,
  	accumulateTwoPhaseDispatchesSkipTarget: accumulateTwoPhaseDispatchesSkipTarget,
  	accumulateEnterLeaveDispatches: accumulateEnterLeaveDispatches,
  	accumulateDirectDispatches: accumulateDirectDispatches
  });
  
  /**
   * Copyright (c) 2013-present, Facebook, Inc.
   *
   * This source code is licensed under the MIT license found in the
   * LICENSE file in the root directory of this source tree.
   *
   */
  
  
  
  var canUseDOM = !!(typeof window !== 'undefined' && window.document && window.document.createElement);
  
  /**
   * Simple, lightweight module assisting with the detection and context of
   * Worker. Helps avoid circular dependencies and allows code to reason about
   * whether or not they are in a Worker, even if they never include the main
   * `ReactWorker` dependency.
   */
  var ExecutionEnvironment = {
  
    canUseDOM: canUseDOM,
  
    canUseWorkers: typeof Worker !== 'undefined',
  
    canUseEventListeners: canUseDOM && !!(window.addEventListener || window.attachEvent),
  
    canUseViewport: canUseDOM && !!window.screen,
  
    isInWorker: !canUseDOM // For now, this is true - might change in the future.
  
  };
  
  var ExecutionEnvironment_1 = ExecutionEnvironment;
  
  var contentKey = null;
  
  /**
   * Gets the key used to access text content on a DOM node.
   *
   * @return {?string} Key used to access text content.
   * @internal
   */
  function getTextContentAccessor() {
    if (!contentKey && ExecutionEnvironment_1.canUseDOM) {
      // Prefer textContent to innerText because many browsers support both but
      // SVG <text> elements don't support innerText even when <div> does.
      contentKey = 'textContent' in document.documentElement ? 'textContent' : 'innerText';
    }
    return contentKey;
  }
  
  /**
   * This helper object stores information about text content of a target node,
   * allowing comparison of content before and after a given event.
   *
   * Identify the node where selection currently begins, then observe
   * both its text content and its current position in the DOM. Since the
   * browser may natively replace the target node during composition, we can
   * use its position to find its replacement.
   *
   *
   */
  var compositionState = {
    _root: null,
    _startText: null,
    _fallbackText: null
  };
  
  function initialize(nativeEventTarget) {
    compositionState._root = nativeEventTarget;
    compositionState._startText = getText();
    return true;
  }
  
  function reset() {
    compositionState._root = null;
    compositionState._startText = null;
    compositionState._fallbackText = null;
  }
  
  function getData() {
    if (compositionState._fallbackText) {
      return compositionState._fallbackText;
    }
  
    var start;
    var startValue = compositionState._startText;
    var startLength = startValue.length;
    var end;
    var endValue = getText();
    var endLength = endValue.length;
  
    for (start = 0; start < startLength; start++) {
      if (startValue[start] !== endValue[start]) {
        break;
      }
    }
  
    var minEnd = startLength - start;
    for (end = 1; end <= minEnd; end++) {
      if (startValue[startLength - end] !== endValue[endLength - end]) {
        break;
      }
    }
  
    var sliceTail = end > 1 ? 1 - end : undefined;
    compositionState._fallbackText = endValue.slice(start, sliceTail);
    return compositionState._fallbackText;
  }
  
  function getText() {
    if ('value' in compositionState._root) {
      return compositionState._root.value;
    }
    return compositionState._root[getTextContentAccessor()];
  }
  
  var ReactInternals = React.__SECRET_INTERNALS_DO_NOT_USE_OR_YOU_WILL_BE_FIRED;
  
  var _assign = ReactInternals.assign;
  
  /* eslint valid-typeof: 0 */
  
  var didWarnForAddedNewProperty = false;
  var isProxySupported = typeof Proxy === 'function';
  var EVENT_POOL_SIZE = 10;
  
  var shouldBeReleasedProperties = ['dispatchConfig', '_targetInst', 'nativeEvent', 'isDefaultPrevented', 'isPropagationStopped', '_dispatchListeners', '_dispatchInstances'];
  
  /**
   * @interface Event
   * @see http://www.w3.org/TR/DOM-Level-3-Events/
   */
  var EventInterface = {
    type: null,
    target: null,
    // currentTarget is set when dispatching; no use in copying it here
    currentTarget: emptyFunction_1.thatReturnsNull,
    eventPhase: null,
    bubbles: null,
    cancelable: null,
    timeStamp: function (event) {
      return event.timeStamp || Date.now();
    },
    defaultPrevented: null,
    isTrusted: null
  };
  
  /**
   * Synthetic events are dispatched by event plugins, typically in response to a
   * top-level event delegation handler.
   *
   * These systems should generally use pooling to reduce the frequency of garbage
   * collection. The system should check `isPersistent` to determine whether the
   * event should be released into the pool after being dispatched. Users that
   * need a persisted event should invoke `persist`.
   *
   * Synthetic events (and subclasses) implement the DOM Level 3 Events API by
   * normalizing browser quirks. Subclasses do not necessarily have to implement a
   * DOM interface; custom application-specific events can also subclass this.
   *
   * @param {object} dispatchConfig Configuration used to dispatch this event.
   * @param {*} targetInst Marker identifying the event target.
   * @param {object} nativeEvent Native browser event.
   * @param {DOMEventTarget} nativeEventTarget Target node.
   */
  function SyntheticEvent(dispatchConfig, targetInst, nativeEvent, nativeEventTarget) {
    {
      // these have a getter/setter for warnings
      delete this.nativeEvent;
      delete this.preventDefault;
      delete this.stopPropagation;
    }
  
    this.dispatchConfig = dispatchConfig;
    this._targetInst = targetInst;
    this.nativeEvent = nativeEvent;
  
    var Interface = this.constructor.Interface;
    for (var propName in Interface) {
      if (!Interface.hasOwnProperty(propName)) {
        continue;
      }
      {
        delete this[propName]; // this has a getter/setter for warnings
      }
      var normalize = Interface[propName];
      if (normalize) {
        this[propName] = normalize(nativeEvent);
      } else {
        if (propName === 'target') {
          this.target = nativeEventTarget;
        } else {
          this[propName] = nativeEvent[propName];
        }
      }
    }
  
    var defaultPrevented = nativeEvent.defaultPrevented != null ? nativeEvent.defaultPrevented : nativeEvent.returnValue === false;
    if (defaultPrevented) {
      this.isDefaultPrevented = emptyFunction_1.thatReturnsTrue;
    } else {
      this.isDefaultPrevented = emptyFunction_1.thatReturnsFalse;
    }
    this.isPropagationStopped = emptyFunction_1.thatReturnsFalse;
    return this;
  }
  
  _assign(SyntheticEvent.prototype, {
    preventDefault: function () {
      this.defaultPrevented = true;
      var event = this.nativeEvent;
      if (!event) {
        return;
      }
  
      if (event.preventDefault) {
        event.preventDefault();
      } else if (typeof event.returnValue !== 'unknown') {
        event.returnValue = false;
      }
      this.isDefaultPrevented = emptyFunction_1.thatReturnsTrue;
    },
  
    stopPropagation: function () {
      var event = this.nativeEvent;
      if (!event) {
        return;
      }
  
      if (event.stopPropagation) {
        event.stopPropagation();
      } else if (typeof event.cancelBubble !== 'unknown') {
        // The ChangeEventPlugin registers a "propertychange" event for
        // IE. This event does not support bubbling or cancelling, and
        // any references to cancelBubble throw "Member not found".  A
        // typeof check of "unknown" circumvents this issue (and is also
        // IE specific).
        event.cancelBubble = true;
      }
  
      this.isPropagationStopped = emptyFunction_1.thatReturnsTrue;
    },
  
    /**
     * We release all dispatched `SyntheticEvent`s after each event loop, adding
     * them back into the pool. This allows a way to hold onto a reference that
     * won't be added back into the pool.
     */
    persist: function () {
      this.isPersistent = emptyFunction_1.thatReturnsTrue;
    },
  
    /**
     * Checks if this event should be released back into the pool.
     *
     * @return {boolean} True if this should not be released, false otherwise.
     */
    isPersistent: emptyFunction_1.thatReturnsFalse,
  
    /**
     * `PooledClass` looks for `destructor` on each instance it releases.
     */
    destructor: function () {
      var Interface = this.constructor.Interface;
      for (var propName in Interface) {
        {
          Object.defineProperty(this, propName, getPooledWarningPropertyDefinition(propName, Interface[propName]));
        }
      }
      for (var i = 0; i < shouldBeReleasedProperties.length; i++) {
        this[shouldBeReleasedProperties[i]] = null;
      }
      {
        Object.defineProperty(this, 'nativeEvent', getPooledWarningPropertyDefinition('nativeEvent', null));
        Object.defineProperty(this, 'preventDefault', getPooledWarningPropertyDefinition('preventDefault', emptyFunction_1));
        Object.defineProperty(this, 'stopPropagation', getPooledWarningPropertyDefinition('stopPropagation', emptyFunction_1));
      }
    }
  });
  
  SyntheticEvent.Interface = EventInterface;
  
  /**
   * Helper to reduce boilerplate when creating subclasses.
   *
   * @param {function} Class
   * @param {?object} Interface
   */
  SyntheticEvent.augmentClass = function (Class, Interface) {
    var Super = this;
  
    var E = function () {};
    E.prototype = Super.prototype;
    var prototype = new E();
  
    _assign(prototype, Class.prototype);
    Class.prototype = prototype;
    Class.prototype.constructor = Class;
  
    Class.Interface = _assign({}, Super.Interface, Interface);
    Class.augmentClass = Super.augmentClass;
    addEventPoolingTo(Class);
  };
  
  /** Proxying after everything set on SyntheticEvent
   * to resolve Proxy issue on some WebKit browsers
   * in which some Event properties are set to undefined (GH#10010)
   */
  {
    if (isProxySupported) {
      /*eslint-disable no-func-assign */
      SyntheticEvent = new Proxy(SyntheticEvent, {
        construct: function (target, args) {
          return this.apply(target, Object.create(target.prototype), args);
        },
        apply: function (constructor, that, args) {
          return new Proxy(constructor.apply(that, args), {
            set: function (target, prop, value) {
              if (prop !== 'isPersistent' && !target.constructor.Interface.hasOwnProperty(prop) && shouldBeReleasedProperties.indexOf(prop) === -1) {
                warning_1$1(didWarnForAddedNewProperty || target.isPersistent(), "This synthetic event is reused for performance reasons. If you're " + "seeing this, you're adding a new property in the synthetic event object. " + 'The property is never released. See ' + 'https://fb.me/react-event-pooling for more information.');
                didWarnForAddedNewProperty = true;
              }
              target[prop] = value;
              return true;
            }
          });
        }
      });
      /*eslint-enable no-func-assign */
    }
  }
  
  addEventPoolingTo(SyntheticEvent);
  
  /**
   * Helper to nullify syntheticEvent instance properties when destructing
   *
   * @param {String} propName
   * @param {?object} getVal
   * @return {object} defineProperty object
   */
  function getPooledWarningPropertyDefinition(propName, getVal) {
    var isFunction = typeof getVal === 'function';
    return {
      configurable: true,
      set: set,
      get: get
    };
  
    function set(val) {
      var action = isFunction ? 'setting the method' : 'setting the property';
      warn(action, 'This is effectively a no-op');
      return val;
    }
  
    function get() {
      var action = isFunction ? 'accessing the method' : 'accessing the property';
      var result = isFunction ? 'This is a no-op function' : 'This is set to null';
      warn(action, result);
      return getVal;
    }
  
    function warn(action, result) {
      var warningCondition = false;
      warning_1$1(warningCondition, "This synthetic event is reused for performance reasons. If you're seeing this, " + "you're %s `%s` on a released/nullified synthetic event. %s. " + 'If you must keep the original synthetic event around, use event.persist(). ' + 'See https://fb.me/react-event-pooling for more information.', action, propName, result);
    }
  }
  
  function getPooledEvent(dispatchConfig, targetInst, nativeEvent, nativeInst) {
    var EventConstructor = this;
    if (EventConstructor.eventPool.length) {
      var instance = EventConstructor.eventPool.pop();
      EventConstructor.call(instance, dispatchConfig, targetInst, nativeEvent, nativeInst);
      return instance;
    }
    return new EventConstructor(dispatchConfig, targetInst, nativeEvent, nativeInst);
  }
  
  function releasePooledEvent(event) {
    var EventConstructor = this;
    !(event instanceof EventConstructor) ? invariant_1$1(false, 'Trying to release an event instance  into a pool of a different type.') : void 0;
    event.destructor();
    if (EventConstructor.eventPool.length < EVENT_POOL_SIZE) {
      EventConstructor.eventPool.push(event);
    }
  }
  
  function addEventPoolingTo(EventConstructor) {
    EventConstructor.eventPool = [];
    EventConstructor.getPooled = getPooledEvent;
    EventConstructor.release = releasePooledEvent;
  }
  
  var SyntheticEvent$1 = SyntheticEvent;
  
  /**
   * @interface Event
   * @see http://www.w3.org/TR/DOM-Level-3-Events/#events-compositionevents
   */
  var CompositionEventInterface = {
    data: null
  };
  
  /**
   * @param {object} dispatchConfig Configuration used to dispatch this event.
   * @param {string} dispatchMarker Marker identifying the event target.
   * @param {object} nativeEvent Native browser event.
   * @extends {SyntheticEvent}
   */
  function SyntheticCompositionEvent(dispatchConfig, dispatchMarker, nativeEvent, nativeEventTarget) {
    return SyntheticEvent$1.call(this, dispatchConfig, dispatchMarker, nativeEvent, nativeEventTarget);
  }
  
  SyntheticEvent$1.augmentClass(SyntheticCompositionEvent, CompositionEventInterface);
  
  /**
   * @interface Event
   * @see http://www.w3.org/TR/2013/WD-DOM-Level-3-Events-20131105
   *      /#events-inputevents
   */
  var InputEventInterface = {
    data: null
  };
  
  /**
   * @param {object} dispatchConfig Configuration used to dispatch this event.
   * @param {string} dispatchMarker Marker identifying the event target.
   * @param {object} nativeEvent Native browser event.
   * @extends {SyntheticEvent}
   */
  function SyntheticInputEvent(dispatchConfig, dispatchMarker, nativeEvent, nativeEventTarget) {
    return SyntheticEvent$1.call(this, dispatchConfig, dispatchMarker, nativeEvent, nativeEventTarget);
  }
  
  SyntheticEvent$1.augmentClass(SyntheticInputEvent, InputEventInterface);
  
  var END_KEYCODES = [9, 13, 27, 32]; // Tab, Return, Esc, Space
  var START_KEYCODE = 229;
  
  var canUseCompositionEvent = ExecutionEnvironment_1.canUseDOM && 'CompositionEvent' in window;
  
  var documentMode = null;
  if (ExecutionEnvironment_1.canUseDOM && 'documentMode' in document) {
    documentMode = document.documentMode;
  }
  
  // Webkit offers a very useful `textInput` event that can be used to
  // directly represent `beforeInput`. The IE `textinput` event is not as
  // useful, so we don't use it.
  var canUseTextInputEvent = ExecutionEnvironment_1.canUseDOM && 'TextEvent' in window && !documentMode && !isPresto();
  
  // In IE9+, we have access to composition events, but the data supplied
  // by the native compositionend event may be incorrect. Japanese ideographic
  // spaces, for instance (\u3000) are not recorded correctly.
  var useFallbackCompositionData = ExecutionEnvironment_1.canUseDOM && (!canUseCompositionEvent || documentMode && documentMode > 8 && documentMode <= 11);
  
  /**
   * Opera <= 12 includes TextEvent in window, but does not fire
   * text input events. Rely on keypress instead.
   */
  function isPresto() {
    var opera = window.opera;
    return typeof opera === 'object' && typeof opera.version === 'function' && parseInt(opera.version(), 10) <= 12;
  }
  
  var SPACEBAR_CODE = 32;
  var SPACEBAR_CHAR = String.fromCharCode(SPACEBAR_CODE);
  
  // Events and their corresponding property names.
  var eventTypes = {
    beforeInput: {
      phasedRegistrationNames: {
        bubbled: 'onBeforeInput',
        captured: 'onBeforeInputCapture'
      },
      dependencies: ['topCompositionEnd', 'topKeyPress', 'topTextInput', 'topPaste']
    },
    compositionEnd: {
      phasedRegistrationNames: {
        bubbled: 'onCompositionEnd',
        captured: 'onCompositionEndCapture'
      },
      dependencies: ['topBlur', 'topCompositionEnd', 'topKeyDown', 'topKeyPress', 'topKeyUp', 'topMouseDown']
    },
    compositionStart: {
      phasedRegistrationNames: {
        bubbled: 'onCompositionStart',
        captured: 'onCompositionStartCapture'
      },
      dependencies: ['topBlur', 'topCompositionStart', 'topKeyDown', 'topKeyPress', 'topKeyUp', 'topMouseDown']
    },
    compositionUpdate: {
      phasedRegistrationNames: {
        bubbled: 'onCompositionUpdate',
        captured: 'onCompositionUpdateCapture'
      },
      dependencies: ['topBlur', 'topCompositionUpdate', 'topKeyDown', 'topKeyPress', 'topKeyUp', 'topMouseDown']
    }
  };
  
  // Track whether we've ever handled a keypress on the space key.
  var hasSpaceKeypress = false;
  
  /**
   * Return whether a native keypress event is assumed to be a command.
   * This is required because Firefox fires `keypress` events for key commands
   * (cut, copy, select-all, etc.) even though no character is inserted.
   */
  function isKeypressCommand(nativeEvent) {
    return (nativeEvent.ctrlKey || nativeEvent.altKey || nativeEvent.metaKey) &&
    // ctrlKey && altKey is equivalent to AltGr, and is not a command.
    !(nativeEvent.ctrlKey && nativeEvent.altKey);
  }
  
  /**
   * Translate native top level events into event types.
   *
   * @param {string} topLevelType
   * @return {object}
   */
  function getCompositionEventType(topLevelType) {
    switch (topLevelType) {
      case 'topCompositionStart':
        return eventTypes.compositionStart;
      case 'topCompositionEnd':
        return eventTypes.compositionEnd;
      case 'topCompositionUpdate':
        return eventTypes.compositionUpdate;
    }
  }
  
  /**
   * Does our fallback best-guess model think this event signifies that
   * composition has begun?
   *
   * @param {string} topLevelType
   * @param {object} nativeEvent
   * @return {boolean}
   */
  function isFallbackCompositionStart(topLevelType, nativeEvent) {
    return topLevelType === 'topKeyDown' && nativeEvent.keyCode === START_KEYCODE;
  }
  
  /**
   * Does our fallback mode think that this event is the end of composition?
   *
   * @param {string} topLevelType
   * @param {object} nativeEvent
   * @return {boolean}
   */
  function isFallbackCompositionEnd(topLevelType, nativeEvent) {
    switch (topLevelType) {
      case 'topKeyUp':
        // Command keys insert or clear IME input.
        return END_KEYCODES.indexOf(nativeEvent.keyCode) !== -1;
      case 'topKeyDown':
        // Expect IME keyCode on each keydown. If we get any other
        // code we must have exited earlier.
        return nativeEvent.keyCode !== START_KEYCODE;
      case 'topKeyPress':
      case 'topMouseDown':
      case 'topBlur':
        // Events are not possible without cancelling IME.
        return true;
      default:
        return false;
    }
  }
  
  /**
   * Google Input Tools provides composition data via a CustomEvent,
   * with the `data` property populated in the `detail` object. If this
   * is available on the event object, use it. If not, this is a plain
   * composition event and we have nothing special to extract.
   *
   * @param {object} nativeEvent
   * @return {?string}
   */
  function getDataFromCustomEvent(nativeEvent) {
    var detail = nativeEvent.detail;
    if (typeof detail === 'object' && 'data' in detail) {
      return detail.data;
    }
    return null;
  }
  
  // Track the current IME composition status, if any.
  var isComposing = false;
  
  /**
   * @return {?object} A SyntheticCompositionEvent.
   */
  function extractCompositionEvent(topLevelType, targetInst, nativeEvent, nativeEventTarget) {
    var eventType;
    var fallbackData;
  
    if (canUseCompositionEvent) {
      eventType = getCompositionEventType(topLevelType);
    } else if (!isComposing) {
      if (isFallbackCompositionStart(topLevelType, nativeEvent)) {
        eventType = eventTypes.compositionStart;
      }
    } else if (isFallbackCompositionEnd(topLevelType, nativeEvent)) {
      eventType = eventTypes.compositionEnd;
    }
  
    if (!eventType) {
      return null;
    }
  
    if (useFallbackCompositionData) {
      // The current composition is stored statically and must not be
      // overwritten while composition continues.
      if (!isComposing && eventType === eventTypes.compositionStart) {
        isComposing = initialize(nativeEventTarget);
      } else if (eventType === eventTypes.compositionEnd) {
        if (isComposing) {
          fallbackData = getData();
        }
      }
    }
  
    var event = SyntheticCompositionEvent.getPooled(eventType, targetInst, nativeEvent, nativeEventTarget);
  
    if (fallbackData) {
      // Inject data generated from fallback path into the synthetic event.
      // This matches the property of native CompositionEventInterface.
      event.data = fallbackData;
    } else {
      var customData = getDataFromCustomEvent(nativeEvent);
      if (customData !== null) {
        event.data = customData;
      }
    }
  
    accumulateTwoPhaseDispatches(event);
    return event;
  }
  
  /**
   * @param {TopLevelTypes} topLevelType Record from `BrowserEventConstants`.
   * @param {object} nativeEvent Native browser event.
   * @return {?string} The string corresponding to this `beforeInput` event.
   */
  function getNativeBeforeInputChars(topLevelType, nativeEvent) {
    switch (topLevelType) {
      case 'topCompositionEnd':
        return getDataFromCustomEvent(nativeEvent);
      case 'topKeyPress':
        /**
         * If native `textInput` events are available, our goal is to make
         * use of them. However, there is a special case: the spacebar key.
         * In Webkit, preventing default on a spacebar `textInput` event
         * cancels character insertion, but it *also* causes the browser
         * to fall back to its default spacebar behavior of scrolling the
         * page.
         *
         * Tracking at:
         * https://code.google.com/p/chromium/issues/detail?id=355103
         *
         * To avoid this issue, use the keypress event as if no `textInput`
         * event is available.
         */
        var which = nativeEvent.which;
        if (which !== SPACEBAR_CODE) {
          return null;
        }
  
        hasSpaceKeypress = true;
        return SPACEBAR_CHAR;
  
      case 'topTextInput':
        // Record the characters to be added to the DOM.
        var chars = nativeEvent.data;
  
        // If it's a spacebar character, assume that we have already handled
        // it at the keypress level and bail immediately. Android Chrome
        // doesn't give us keycodes, so we need to blacklist it.
        if (chars === SPACEBAR_CHAR && hasSpaceKeypress) {
          return null;
        }
  
        return chars;
  
      default:
        // For other native event types, do nothing.
        return null;
    }
  }
  
  /**
   * For browsers that do not provide the `textInput` event, extract the
   * appropriate string to use for SyntheticInputEvent.
   *
   * @param {string} topLevelType Record from `BrowserEventConstants`.
   * @param {object} nativeEvent Native browser event.
   * @return {?string} The fallback string for this `beforeInput` event.
   */
  function getFallbackBeforeInputChars(topLevelType, nativeEvent) {
    // If we are currently composing (IME) and using a fallback to do so,
    // try to extract the composed characters from the fallback object.
    // If composition event is available, we extract a string only at
    // compositionevent, otherwise extract it at fallback events.
    if (isComposing) {
      if (topLevelType === 'topCompositionEnd' || !canUseCompositionEvent && isFallbackCompositionEnd(topLevelType, nativeEvent)) {
        var chars = getData();
        reset();
        isComposing = false;
        return chars;
      }
      return null;
    }
  
    switch (topLevelType) {
      case 'topPaste':
        // If a paste event occurs after a keypress, throw out the input
        // chars. Paste events should not lead to BeforeInput events.
        return null;
      case 'topKeyPress':
        /**
         * As of v27, Firefox may fire keypress events even when no character
         * will be inserted. A few possibilities:
         *
         * - `which` is `0`. Arrow keys, Esc key, etc.
         *
         * - `which` is the pressed key code, but no char is available.
         *   Ex: 'AltGr + d` in Polish. There is no modified character for
         *   this key combination and no character is inserted into the
         *   document, but FF fires the keypress for char code `100` anyway.
         *   No `input` event will occur.
         *
         * - `which` is the pressed key code, but a command combination is
         *   being used. Ex: `Cmd+C`. No character is inserted, and no
         *   `input` event will occur.
         */
        if (!isKeypressCommand(nativeEvent)) {
          // IE fires the `keypress` event when a user types an emoji via
          // Touch keyboard of Windows.  In such a case, the `char` property
          // holds an emoji character like `\uD83D\uDE0A`.  Because its length
          // is 2, the property `which` does not represent an emoji correctly.
          // In such a case, we directly return the `char` property instead of
          // using `which`.
          if (nativeEvent.char && nativeEvent.char.length > 1) {
            return nativeEvent.char;
          } else if (nativeEvent.which) {
            return String.fromCharCode(nativeEvent.which);
          }
        }
        return null;
      case 'topCompositionEnd':
        return useFallbackCompositionData ? null : nativeEvent.data;
      default:
        return null;
    }
  }
  
  /**
   * Extract a SyntheticInputEvent for `beforeInput`, based on either native
   * `textInput` or fallback behavior.
   *
   * @return {?object} A SyntheticInputEvent.
   */
  function extractBeforeInputEvent(topLevelType, targetInst, nativeEvent, nativeEventTarget) {
    var chars;
  
    if (canUseTextInputEvent) {
      chars = getNativeBeforeInputChars(topLevelType, nativeEvent);
    } else {
      chars = getFallbackBeforeInputChars(topLevelType, nativeEvent);
    }
  
    // If no characters are being inserted, no BeforeInput event should
    // be fired.
    if (!chars) {
      return null;
    }
  
    var event = SyntheticInputEvent.getPooled(eventTypes.beforeInput, targetInst, nativeEvent, nativeEventTarget);
  
    event.data = chars;
    accumulateTwoPhaseDispatches(event);
    return event;
  }
  
  /**
   * Create an `onBeforeInput` event to match
   * http://www.w3.org/TR/2013/WD-DOM-Level-3-Events-20131105/#events-inputevents.
   *
   * This event plugin is based on the native `textInput` event
   * available in Chrome, Safari, Opera, and IE. This event fires after
   * `onKeyPress` and `onCompositionEnd`, but before `onInput`.
   *
   * `beforeInput` is spec'd but not implemented in any browsers, and
   * the `input` event does not provide any useful information about what has
   * actually been added, contrary to the spec. Thus, `textInput` is the best
   * available event to identify the characters that have actually been inserted
   * into the target node.
   *
   * This plugin is also responsible for emitting `composition` events, thus
   * allowing us to share composition fallback code for both `beforeInput` and
   * `composition` event types.
   */
  var BeforeInputEventPlugin = {
    eventTypes: eventTypes,
  
    extractEvents: function (topLevelType, targetInst, nativeEvent, nativeEventTarget) {
      return [extractCompositionEvent(topLevelType, targetInst, nativeEvent, nativeEventTarget), extractBeforeInputEvent(topLevelType, targetInst, nativeEvent, nativeEventTarget)];
    }
  };
  
  // Use to restore controlled state after a change event has fired.
  
  var fiberHostComponent = null;
  
  var ReactControlledComponentInjection = {
    injectFiberControlledHostComponent: function (hostComponentImpl) {
      // The fiber implementation doesn't use dynamic dispatch so we need to
      // inject the implementation.
      fiberHostComponent = hostComponentImpl;
    }
  };
  
  var restoreTarget = null;
  var restoreQueue = null;
  
  function restoreStateOfTarget(target) {
    // We perform this translation at the end of the event loop so that we
    // always receive the correct fiber here
    var internalInstance = getInstanceFromNode(target);
    if (!internalInstance) {
      // Unmounted
      return;
    }
    !(fiberHostComponent && typeof fiberHostComponent.restoreControlledState === 'function') ? invariant_1$1(false, 'Fiber needs to be injected to handle a fiber target for controlled events. This error is likely caused by a bug in React. Please file an issue.') : void 0;
    var props = getFiberCurrentPropsFromNode(internalInstance.stateNode);
    fiberHostComponent.restoreControlledState(internalInstance.stateNode, internalInstance.type, props);
  }
  
  var injection$3 = ReactControlledComponentInjection;
  
  function enqueueStateRestore(target) {
    if (restoreTarget) {
      if (restoreQueue) {
        restoreQueue.push(target);
      } else {
        restoreQueue = [target];
      }
    } else {
      restoreTarget = target;
    }
  }
  
  function restoreStateIfNeeded() {
    if (!restoreTarget) {
      return;
    }
    var target = restoreTarget;
    var queuedTargets = restoreQueue;
    restoreTarget = null;
    restoreQueue = null;
  
    restoreStateOfTarget(target);
    if (queuedTargets) {
      for (var i = 0; i < queuedTargets.length; i++) {
        restoreStateOfTarget(queuedTargets[i]);
      }
    }
  }
  
  var ReactControlledComponent = Object.freeze({
  	injection: injection$3,
  	enqueueStateRestore: enqueueStateRestore,
  	restoreStateIfNeeded: restoreStateIfNeeded
  });
  
  // Used as a way to call batchedUpdates when we don't have a reference to
  // the renderer. Such as when we're dispatching events or if third party
  // libraries need to call batchedUpdates. Eventually, this API will go away when
  // everything is batched by default. We'll then have a similar API to opt-out of
  // scheduled work and instead do synchronous work.
  
  // Defaults
  var fiberBatchedUpdates = function (fn, bookkeeping) {
    return fn(bookkeeping);
  };
  
  var isNestingBatched = false;
  function batchedUpdates(fn, bookkeeping) {
    if (isNestingBatched) {
      // If we are currently inside another batch, we need to wait until it
      // fully completes before restoring state. Therefore, we add the target to
      // a queue of work.
      return fiberBatchedUpdates(fn, bookkeeping);
    }
    isNestingBatched = true;
    try {
      return fiberBatchedUpdates(fn, bookkeeping);
    } finally {
      // Here we wait until all updates have propagated, which is important
      // when using controlled components within layers:
      // https://github.com/facebook/react/issues/1698
      // Then we restore state of any controlled component.
      isNestingBatched = false;
      restoreStateIfNeeded();
    }
  }
  
  var ReactGenericBatchingInjection = {
    injectFiberBatchedUpdates: function (_batchedUpdates) {
      fiberBatchedUpdates = _batchedUpdates;
    }
  };
  
  var injection$4 = ReactGenericBatchingInjection;
  
  /**
   * @see http://www.whatwg.org/specs/web-apps/current-work/multipage/the-input-element.html#input-type-attr-summary
   */
  var supportedInputTypes = {
    color: true,
    date: true,
    datetime: true,
    'datetime-local': true,
    email: true,
    month: true,
    number: true,
    password: true,
    range: true,
    search: true,
    tel: true,
    text: true,
    time: true,
    url: true,
    week: true
  };
  
  function isTextInputElement(elem) {
    var nodeName = elem && elem.nodeName && elem.nodeName.toLowerCase();
  
    if (nodeName === 'input') {
      return !!supportedInputTypes[elem.type];
    }
  
    if (nodeName === 'textarea') {
      return true;
    }
  
    return false;
  }
  
  /**
   * HTML nodeType values that represent the type of the node
   */
  
  var ELEMENT_NODE = 1;
  var TEXT_NODE = 3;
  var COMMENT_NODE = 8;
  var DOCUMENT_NODE = 9;
  var DOCUMENT_FRAGMENT_NODE = 11;
  
  /**
   * Gets the target node from a native browser event by accounting for
   * inconsistencies in browser DOM APIs.
   *
   * @param {object} nativeEvent Native browser event.
   * @return {DOMEventTarget} Target node.
   */
  function getEventTarget(nativeEvent) {
    var target = nativeEvent.target || nativeEvent.srcElement || window;
  
    // Normalize SVG <use> element events #4963
    if (target.correspondingUseElement) {
      target = target.correspondingUseElement;
    }
  
    // Safari may fire events on text nodes (Node.TEXT_NODE is 3).
    // @see http://www.quirksmode.org/js/events_properties.html
    return target.nodeType === TEXT_NODE ? target.parentNode : target;
  }
  
  var useHasFeature;
  if (ExecutionEnvironment_1.canUseDOM) {
    useHasFeature = document.implementation && document.implementation.hasFeature &&
    // always returns true in newer browsers as per the standard.
    // @see http://dom.spec.whatwg.org/#dom-domimplementation-hasfeature
    document.implementation.hasFeature('', '') !== true;
  }
  
  /**
   * Checks if an event is supported in the current execution environment.
   *
   * NOTE: This will not work correctly for non-generic events such as `change`,
   * `reset`, `load`, `error`, and `select`.
   *
   * Borrows from Modernizr.
   *
   * @param {string} eventNameSuffix Event name, e.g. "click".
   * @param {?boolean} capture Check if the capture phase is supported.
   * @return {boolean} True if the event is supported.
   * @internal
   * @license Modernizr 3.0.0pre (Custom Build) | MIT
   */
  function isEventSupported(eventNameSuffix, capture) {
    if (!ExecutionEnvironment_1.canUseDOM || capture && !('addEventListener' in document)) {
      return false;
    }
  
    var eventName = 'on' + eventNameSuffix;
    var isSupported = eventName in document;
  
    if (!isSupported) {
      var element = document.createElement('div');
      element.setAttribute(eventName, 'return;');
      isSupported = typeof element[eventName] === 'function';
    }
  
    if (!isSupported && useHasFeature && eventNameSuffix === 'wheel') {
      // This is the only way to test support for the `wheel` event in IE9+.
      isSupported = document.implementation.hasFeature('Events.wheel', '3.0');
    }
  
    return isSupported;
  }
  
  function isCheckable(elem) {
    var type = elem.type;
    var nodeName = elem.nodeName;
    return nodeName && nodeName.toLowerCase() === 'input' && (type === 'checkbox' || type === 'radio');
  }
  
  function getTracker(node) {
    return node._valueTracker;
  }
  
  function detachTracker(node) {
    node._valueTracker = null;
  }
  
  function getValueFromNode(node) {
    var value = '';
    if (!node) {
      return value;
    }
  
    if (isCheckable(node)) {
      value = node.checked ? 'true' : 'false';
    } else {
      value = node.value;
    }
  
    return value;
  }
  
  function trackValueOnNode(node) {
    var valueField = isCheckable(node) ? 'checked' : 'value';
    var descriptor = Object.getOwnPropertyDescriptor(node.constructor.prototype, valueField);
  
    var currentValue = '' + node[valueField];
  
    // if someone has already defined a value or Safari, then bail
    // and don't track value will cause over reporting of changes,
    // but it's better then a hard failure
    // (needed for certain tests that spyOn input values and Safari)
    if (node.hasOwnProperty(valueField) || typeof descriptor.get !== 'function' || typeof descriptor.set !== 'function') {
      return;
    }
  
    Object.defineProperty(node, valueField, {
      enumerable: descriptor.enumerable,
      configurable: true,
      get: function () {
        return descriptor.get.call(this);
      },
      set: function (value) {
        currentValue = '' + value;
        descriptor.set.call(this, value);
      }
    });
  
    var tracker = {
      getValue: function () {
        return currentValue;
      },
      setValue: function (value) {
        currentValue = '' + value;
      },
      stopTracking: function () {
        detachTracker(node);
        delete node[valueField];
      }
    };
    return tracker;
  }
  
  function track(node) {
    if (getTracker(node)) {
      return;
    }
  
    // TODO: Once it's just Fiber we can move this to node._wrapperState
    node._valueTracker = trackValueOnNode(node);
  }
  
  function updateValueIfChanged(node) {
    if (!node) {
      return false;
    }
  
    var tracker = getTracker(node);
    // if there is no tracker at this point it's unlikely
    // that trying again will succeed
    if (!tracker) {
      return true;
    }
  
    var lastValue = tracker.getValue();
    var nextValue = getValueFromNode(node);
    if (nextValue !== lastValue) {
      tracker.setValue(nextValue);
      return true;
    }
    return false;
  }
  
  var eventTypes$1 = {
    change: {
      phasedRegistrationNames: {
        bubbled: 'onChange',
        captured: 'onChangeCapture'
      },
      dependencies: ['topBlur', 'topChange', 'topClick', 'topFocus', 'topInput', 'topKeyDown', 'topKeyUp', 'topSelectionChange']
    }
  };
  
  function createAndAccumulateChangeEvent(inst, nativeEvent, target) {
    var event = SyntheticEvent$1.getPooled(eventTypes$1.change, inst, nativeEvent, target);
    event.type = 'change';
    // Flag this event loop as needing state restore.
    enqueueStateRestore(target);
    accumulateTwoPhaseDispatches(event);
    return event;
  }
  /**
   * For IE shims
   */
  var activeElement = null;
  var activeElementInst = null;
  
  /**
   * SECTION: handle `change` event
   */
  function shouldUseChangeEvent(elem) {
    var nodeName = elem.nodeName && elem.nodeName.toLowerCase();
    return nodeName === 'select' || nodeName === 'input' && elem.type === 'file';
  }
  
  function manualDispatchChangeEvent(nativeEvent) {
    var event = createAndAccumulateChangeEvent(activeElementInst, nativeEvent, getEventTarget(nativeEvent));
  
    // If change and propertychange bubbled, we'd just bind to it like all the
    // other events and have it go through ReactBrowserEventEmitter. Since it
    // doesn't, we manually listen for the events and so we have to enqueue and
    // process the abstract event manually.
    //
    // Batching is necessary here in order to ensure that all event handlers run
    // before the next rerender (including event handlers attached to ancestor
    // elements instead of directly on the input). Without this, controlled
    // components don't work properly in conjunction with event bubbling because
    // the component is rerendered and the value reverted before all the event
    // handlers can run. See https://github.com/facebook/react/issues/708.
    batchedUpdates(runEventInBatch, event);
  }
  
  function runEventInBatch(event) {
    enqueueEvents(event);
    processEventQueue(false);
  }
  
  function getInstIfValueChanged(targetInst) {
    var targetNode = getNodeFromInstance$1(targetInst);
    if (updateValueIfChanged(targetNode)) {
      return targetInst;
    }
  }
  
  function getTargetInstForChangeEvent(topLevelType, targetInst) {
    if (topLevelType === 'topChange') {
      return targetInst;
    }
  }
  
  /**
   * SECTION: handle `input` event
   */
  var isInputEventSupported = false;
  if (ExecutionEnvironment_1.canUseDOM) {
    // IE9 claims to support the input event but fails to trigger it when
    // deleting text, so we ignore its input events.
    isInputEventSupported = isEventSupported('input') && (!document.documentMode || document.documentMode > 9);
  }
  
  /**
   * (For IE <=9) Starts tracking propertychange events on the passed-in element
   * and override the value property so that we can distinguish user events from
   * value changes in JS.
   */
  function startWatchingForValueChange(target, targetInst) {
    activeElement = target;
    activeElementInst = targetInst;
    activeElement.attachEvent('onpropertychange', handlePropertyChange);
  }
  
  /**
   * (For IE <=9) Removes the event listeners from the currently-tracked element,
   * if any exists.
   */
  function stopWatchingForValueChange() {
    if (!activeElement) {
      return;
    }
    activeElement.detachEvent('onpropertychange', handlePropertyChange);
    activeElement = null;
    activeElementInst = null;
  }
  
  /**
   * (For IE <=9) Handles a propertychange event, sending a `change` event if
   * the value of the active element has changed.
   */
  function handlePropertyChange(nativeEvent) {
    if (nativeEvent.propertyName !== 'value') {
      return;
    }
    if (getInstIfValueChanged(activeElementInst)) {
      manualDispatchChangeEvent(nativeEvent);
    }
  }
  
  function handleEventsForInputEventPolyfill(topLevelType, target, targetInst) {
    if (topLevelType === 'topFocus') {
      // In IE9, propertychange fires for most input events but is buggy and
      // doesn't fire when text is deleted, but conveniently, selectionchange
      // appears to fire in all of the remaining cases so we catch those and
      // forward the event if the value has changed
      // In either case, we don't want to call the event handler if the value
      // is changed from JS so we redefine a setter for `.value` that updates
      // our activeElementValue variable, allowing us to ignore those changes
      //
      // stopWatching() should be a noop here but we call it just in case we
      // missed a blur event somehow.
      stopWatchingForValueChange();
      startWatchingForValueChange(target, targetInst);
    } else if (topLevelType === 'topBlur') {
      stopWatchingForValueChange();
    }
  }
  
  // For IE8 and IE9.
  function getTargetInstForInputEventPolyfill(topLevelType, targetInst) {
    if (topLevelType === 'topSelectionChange' || topLevelType === 'topKeyUp' || topLevelType === 'topKeyDown') {
      // On the selectionchange event, the target is just document which isn't
      // helpful for us so just check activeElement instead.
      //
      // 99% of the time, keydown and keyup aren't necessary. IE8 fails to fire
      // propertychange on the first input event after setting `value` from a
      // script and fires only keydown, keypress, keyup. Catching keyup usually
      // gets it and catching keydown lets us fire an event for the first
      // keystroke if user does a key repeat (it'll be a little delayed: right
      // before the second keystroke). Other input methods (e.g., paste) seem to
      // fire selectionchange normally.
      return getInstIfValueChanged(activeElementInst);
    }
  }
  
  /**
   * SECTION: handle `click` event
   */
  function shouldUseClickEvent(elem) {
    // Use the `click` event to detect changes to checkbox and radio inputs.
    // This approach works across all browsers, whereas `change` does not fire
    // until `blur` in IE8.
    var nodeName = elem.nodeName;
    return nodeName && nodeName.toLowerCase() === 'input' && (elem.type === 'checkbox' || elem.type === 'radio');
  }
  
  function getTargetInstForClickEvent(topLevelType, targetInst) {
    if (topLevelType === 'topClick') {
      return getInstIfValueChanged(targetInst);
    }
  }
  
  function getTargetInstForInputOrChangeEvent(topLevelType, targetInst) {
    if (topLevelType === 'topInput' || topLevelType === 'topChange') {
      return getInstIfValueChanged(targetInst);
    }
  }
  
  function handleControlledInputBlur(inst, node) {
    // TODO: In IE, inst is occasionally null. Why?
    if (inst == null) {
      return;
    }
  
    // Fiber and ReactDOM keep wrapper state in separate places
    var state = inst._wrapperState || node._wrapperState;
  
    if (!state || !state.controlled || node.type !== 'number') {
      return;
    }
  
    // If controlled, assign the value attribute to the current value on blur
    var value = '' + node.value;
    if (node.getAttribute('value') !== value) {
      node.setAttribute('value', value);
    }
  }
  
  /**
   * This plugin creates an `onChange` event that normalizes change events
   * across form elements. This event fires at a time when it's possible to
   * change the element's value without seeing a flicker.
   *
   * Supported elements are:
   * - input (see `isTextInputElement`)
   * - textarea
   * - select
   */
  var ChangeEventPlugin = {
    eventTypes: eventTypes$1,
  
    _isInputEventSupported: isInputEventSupported,
  
    extractEvents: function (topLevelType, targetInst, nativeEvent, nativeEventTarget) {
      var targetNode = targetInst ? getNodeFromInstance$1(targetInst) : window;
  
      var getTargetInstFunc, handleEventFunc;
      if (shouldUseChangeEvent(targetNode)) {
        getTargetInstFunc = getTargetInstForChangeEvent;
      } else if (isTextInputElement(targetNode)) {
        if (isInputEventSupported) {
          getTargetInstFunc = getTargetInstForInputOrChangeEvent;
        } else {
          getTargetInstFunc = getTargetInstForInputEventPolyfill;
          handleEventFunc = handleEventsForInputEventPolyfill;
        }
      } else if (shouldUseClickEvent(targetNode)) {
        getTargetInstFunc = getTargetInstForClickEvent;
      }
  
      if (getTargetInstFunc) {
        var inst = getTargetInstFunc(topLevelType, targetInst);
        if (inst) {
          var event = createAndAccumulateChangeEvent(inst, nativeEvent, nativeEventTarget);
          return event;
        }
      }
  
      if (handleEventFunc) {
        handleEventFunc(topLevelType, targetNode, targetInst);
      }
  
      // When blurring, set the value attribute for number inputs
      if (topLevelType === 'topBlur') {
        handleControlledInputBlur(targetInst, targetNode);
      }
    }
  };
  
  /**
   * Module that is injectable into `EventPluginHub`, that specifies a
   * deterministic ordering of `EventPlugin`s. A convenient way to reason about
   * plugins, without having to package every one of them. This is better than
   * having plugins be ordered in the same order that they are injected because
   * that ordering would be influenced by the packaging order.
   * `ResponderEventPlugin` must occur before `SimpleEventPlugin` so that
   * preventing default on events is convenient in `SimpleEventPlugin` handlers.
   */
  var DOMEventPluginOrder = ['ResponderEventPlugin', 'SimpleEventPlugin', 'TapEventPlugin', 'EnterLeaveEventPlugin', 'ChangeEventPlugin', 'SelectEventPlugin', 'BeforeInputEventPlugin'];
  
  /**
   * @interface UIEvent
   * @see http://www.w3.org/TR/DOM-Level-3-Events/
   */
  var UIEventInterface = {
    view: null,
    detail: null
  };
  
  /**
   * @param {object} dispatchConfig Configuration used to dispatch this event.
   * @param {string} dispatchMarker Marker identifying the event target.
   * @param {object} nativeEvent Native browser event.
   * @extends {SyntheticEvent}
   */
  function SyntheticUIEvent(dispatchConfig, dispatchMarker, nativeEvent, nativeEventTarget) {
    return SyntheticEvent$1.call(this, dispatchConfig, dispatchMarker, nativeEvent, nativeEventTarget);
  }
  
  SyntheticEvent$1.augmentClass(SyntheticUIEvent, UIEventInterface);
  
  /**
   * Translation from modifier key to the associated property in the event.
   * @see http://www.w3.org/TR/DOM-Level-3-Events/#keys-Modifiers
   */
  
  var modifierKeyToProp = {
    Alt: 'altKey',
    Control: 'ctrlKey',
    Meta: 'metaKey',
    Shift: 'shiftKey'
  };
  
  // IE8 does not implement getModifierState so we simply map it to the only
  // modifier keys exposed by the event itself, does not support Lock-keys.
  // Currently, all major browsers except Chrome seems to support Lock-keys.
  function modifierStateGetter(keyArg) {
    var syntheticEvent = this;
    var nativeEvent = syntheticEvent.nativeEvent;
    if (nativeEvent.getModifierState) {
      return nativeEvent.getModifierState(keyArg);
    }
    var keyProp = modifierKeyToProp[keyArg];
    return keyProp ? !!nativeEvent[keyProp] : false;
  }
  
  function getEventModifierState(nativeEvent) {
    return modifierStateGetter;
  }
  
  /**
   * @interface MouseEvent
   * @see http://www.w3.org/TR/DOM-Level-3-Events/
   */
  var MouseEventInterface = {
    screenX: null,
    screenY: null,
    clientX: null,
    clientY: null,
    pageX: null,
    pageY: null,
    ctrlKey: null,
    shiftKey: null,
    altKey: null,
    metaKey: null,
    getModifierState: getEventModifierState,
    button: null,
    buttons: null,
    relatedTarget: function (event) {
      return event.relatedTarget || (event.fromElement === event.srcElement ? event.toElement : event.fromElement);
    }
  };
  
  /**
   * @param {object} dispatchConfig Configuration used to dispatch this event.
   * @param {string} dispatchMarker Marker identifying the event target.
   * @param {object} nativeEvent Native browser event.
   * @extends {SyntheticUIEvent}
   */
  function SyntheticMouseEvent(dispatchConfig, dispatchMarker, nativeEvent, nativeEventTarget) {
    return SyntheticUIEvent.call(this, dispatchConfig, dispatchMarker, nativeEvent, nativeEventTarget);
  }
  
  SyntheticUIEvent.augmentClass(SyntheticMouseEvent, MouseEventInterface);
  
  var eventTypes$2 = {
    mouseEnter: {
      registrationName: 'onMouseEnter',
      dependencies: ['topMouseOut', 'topMouseOver']
    },
    mouseLeave: {
      registrationName: 'onMouseLeave',
      dependencies: ['topMouseOut', 'topMouseOver']
    }
  };
  
  var EnterLeaveEventPlugin = {
    eventTypes: eventTypes$2,
  
    /**
     * For almost every interaction we care about, there will be both a top-level
     * `mouseover` and `mouseout` event that occurs. Only use `mouseout` so that
     * we do not extract duplicate events. However, moving the mouse into the
     * browser from outside will not fire a `mouseout` event. In this case, we use
     * the `mouseover` top-level event.
     */
    extractEvents: function (topLevelType, targetInst, nativeEvent, nativeEventTarget) {
      if (topLevelType === 'topMouseOver' && (nativeEvent.relatedTarget || nativeEvent.fromElement)) {
        return null;
      }
      if (topLevelType !== 'topMouseOut' && topLevelType !== 'topMouseOver') {
        // Must not be a mouse in or mouse out - ignoring.
        return null;
      }
  
      var win;
      if (nativeEventTarget.window === nativeEventTarget) {
        // `nativeEventTarget` is probably a window object.
        win = nativeEventTarget;
      } else {
        // TODO: Figure out why `ownerDocument` is sometimes undefined in IE8.
        var doc = nativeEventTarget.ownerDocument;
        if (doc) {
          win = doc.defaultView || doc.parentWindow;
        } else {
          win = window;
        }
      }
  
      var from;
      var to;
      if (topLevelType === 'topMouseOut') {
        from = targetInst;
        var related = nativeEvent.relatedTarget || nativeEvent.toElement;
        to = related ? getClosestInstanceFromNode(related) : null;
      } else {
        // Moving to a node from outside the window.
        from = null;
        to = targetInst;
      }
  
      if (from === to) {
        // Nothing pertains to our managed components.
        return null;
      }
  
      var fromNode = from == null ? win : getNodeFromInstance$1(from);
      var toNode = to == null ? win : getNodeFromInstance$1(to);
  
      var leave = SyntheticMouseEvent.getPooled(eventTypes$2.mouseLeave, from, nativeEvent, nativeEventTarget);
      leave.type = 'mouseleave';
      leave.target = fromNode;
      leave.relatedTarget = toNode;
  
      var enter = SyntheticMouseEvent.getPooled(eventTypes$2.mouseEnter, to, nativeEvent, nativeEventTarget);
      enter.type = 'mouseenter';
      enter.target = toNode;
      enter.relatedTarget = fromNode;
  
      accumulateEnterLeaveDispatches(leave, enter, from, to);
  
      return [leave, enter];
    }
  };
  
  /**
   * `ReactInstanceMap` maintains a mapping from a public facing stateful
   * instance (key) and the internal representation (value). This allows public
   * methods to accept the user facing instance as an argument and map them back
   * to internal methods.
   *
   * Note that this module is currently shared and assumed to be stateless.
   * If this becomes an actual Map, that will break.
   */
  
  /**
   * This API should be called `delete` but we'd have to make sure to always
   * transform these to strings for IE support. When this transform is fully
   * supported we can rename it.
   */
  
  
  function get(key) {
    return key._reactInternalFiber;
  }
  
  function has(key) {
    return key._reactInternalFiber !== undefined;
  }
  
  function set(key, value) {
    key._reactInternalFiber = value;
  }
  
  var ReactInternals$1 = React.__SECRET_INTERNALS_DO_NOT_USE_OR_YOU_WILL_BE_FIRED;
  
  var ReactCurrentOwner = ReactInternals$1.ReactCurrentOwner;
  var ReactDebugCurrentFrame = ReactInternals$1.ReactDebugCurrentFrame;
  
  function getComponentName(fiber) {
    var type = fiber.type;
  
    if (typeof type === 'string') {
      return type;
    }
    if (typeof type === 'function') {
      return type.displayName || type.name;
    }
    return null;
  }
  
  // Don't change these two values:
  var NoEffect = 0; //           0b00000000
  var PerformedWork = 1; //      0b00000001
  
  // You can change the rest (and add more).
  var Placement = 2; //          0b00000010
  var Update = 4; //             0b00000100
  var PlacementAndUpdate = 6; // 0b00000110
  var Deletion = 8; //           0b00001000
  var ContentReset = 16; //      0b00010000
  var Callback = 32; //          0b00100000
  var Err = 64; //               0b01000000
  var Ref = 128; //              0b10000000
  
  var MOUNTING = 1;
  var MOUNTED = 2;
  var UNMOUNTED = 3;
  
  function isFiberMountedImpl(fiber) {
    var node = fiber;
    if (!fiber.alternate) {
      // If there is no alternate, this might be a new tree that isn't inserted
      // yet. If it is, then it will have a pending insertion effect on it.
      if ((node.effectTag & Placement) !== NoEffect) {
        return MOUNTING;
      }
      while (node['return']) {
        node = node['return'];
        if ((node.effectTag & Placement) !== NoEffect) {
          return MOUNTING;
        }
      }
    } else {
      while (node['return']) {
        node = node['return'];
      }
    }
    if (node.tag === HostRoot) {
      // TODO: Check if this was a nested HostRoot when used with
      // renderContainerIntoSubtree.
      return MOUNTED;
    }
    // If we didn't hit the root, that means that we're in an disconnected tree
    // that has been unmounted.
    return UNMOUNTED;
  }
  
  function isFiberMounted(fiber) {
    return isFiberMountedImpl(fiber) === MOUNTED;
  }
  
  function isMounted(component) {
    {
      var owner = ReactCurrentOwner.current;
      if (owner !== null && owner.tag === ClassComponent) {
        var ownerFiber = owner;
        var instance = ownerFiber.stateNode;
        warning_1$1(instance._warnedAboutRefsInRender, '%s is accessing isMounted inside its render() function. ' + 'render() should be a pure function of props and state. It should ' + 'never access something that requires stale data from the previous ' + 'render, such as refs. Move this logic to componentDidMount and ' + 'componentDidUpdate instead.', getComponentName(ownerFiber) || 'A component');
        instance._warnedAboutRefsInRender = true;
      }
    }
  
    var fiber = get(component);
    if (!fiber) {
      return false;
    }
    return isFiberMountedImpl(fiber) === MOUNTED;
  }
  
  function assertIsMounted(fiber) {
    !(isFiberMountedImpl(fiber) === MOUNTED) ? invariant_1$1(false, 'Unable to find node on an unmounted component.') : void 0;
  }
  
  function findCurrentFiberUsingSlowPath(fiber) {
    var alternate = fiber.alternate;
    if (!alternate) {
      // If there is no alternate, then we only need to check if it is mounted.
      var state = isFiberMountedImpl(fiber);
      !(state !== UNMOUNTED) ? invariant_1$1(false, 'Unable to find node on an unmounted component.') : void 0;
      if (state === MOUNTING) {
        return null;
      }
      return fiber;
    }
    // If we have two possible branches, we'll walk backwards up to the root
    // to see what path the root points to. On the way we may hit one of the
    // special cases and we'll deal with them.
    var a = fiber;
    var b = alternate;
    while (true) {
      var parentA = a['return'];
      var parentB = parentA ? parentA.alternate : null;
      if (!parentA || !parentB) {
        // We're at the root.
        break;
      }
  
      // If both copies of the parent fiber point to the same child, we can
      // assume that the child is current. This happens when we bailout on low
      // priority: the bailed out fiber's child reuses the current child.
      if (parentA.child === parentB.child) {
        var child = parentA.child;
        while (child) {
          if (child === a) {
            // We've determined that A is the current branch.
            assertIsMounted(parentA);
            return fiber;
          }
          if (child === b) {
            // We've determined that B is the current branch.
            assertIsMounted(parentA);
            return alternate;
          }
          child = child.sibling;
        }
        // We should never have an alternate for any mounting node. So the only
        // way this could possibly happen is if this was unmounted, if at all.
        invariant_1$1(false, 'Unable to find node on an unmounted component.');
      }
  
      if (a['return'] !== b['return']) {
        // The return pointer of A and the return pointer of B point to different
        // fibers. We assume that return pointers never criss-cross, so A must
        // belong to the child set of A.return, and B must belong to the child
        // set of B.return.
        a = parentA;
        b = parentB;
      } else {
        // The return pointers point to the same fiber. We'll have to use the
        // default, slow path: scan the child sets of each parent alternate to see
        // which child belongs to which set.
        //
        // Search parent A's child set
        var didFindChild = false;
        var _child = parentA.child;
        while (_child) {
          if (_child === a) {
            didFindChild = true;
            a = parentA;
            b = parentB;
            break;
          }
          if (_child === b) {
            didFindChild = true;
            b = parentA;
            a = parentB;
            break;
          }
          _child = _child.sibling;
        }
        if (!didFindChild) {
          // Search parent B's child set
          _child = parentB.child;
          while (_child) {
            if (_child === a) {
              didFindChild = true;
              a = parentB;
              b = parentA;
              break;
            }
            if (_child === b) {
              didFindChild = true;
              b = parentB;
              a = parentA;
              break;
            }
            _child = _child.sibling;
          }
          !didFindChild ? invariant_1$1(false, 'Child was not found in either parent set. This indicates a bug in React related to the return pointer. Please file an issue.') : void 0;
        }
      }
  
      !(a.alternate === b) ? invariant_1$1(false, 'Return fibers should always be each others\' alternates. This error is likely caused by a bug in React. Please file an issue.') : void 0;
    }
    // If the root is not a host container, we're in a disconnected tree. I.e.
    // unmounted.
    !(a.tag === HostRoot) ? invariant_1$1(false, 'Unable to find node on an unmounted component.') : void 0;
    if (a.stateNode.current === a) {
      // We've determined that A is the current branch.
      return fiber;
    }
    // Otherwise B has to be current branch.
    return alternate;
  }
  
  function findCurrentHostFiber(parent) {
    var currentParent = findCurrentFiberUsingSlowPath(parent);
    if (!currentParent) {
      return null;
    }
  
    // Next we'll drill down this component to find the first HostComponent/Text.
    var node = currentParent;
    while (true) {
      if (node.tag === HostComponent || node.tag === HostText) {
        return node;
      } else if (node.child) {
        node.child['return'] = node;
        node = node.child;
        continue;
      }
      if (node === currentParent) {
        return null;
      }
      while (!node.sibling) {
        if (!node['return'] || node['return'] === currentParent) {
          return null;
        }
        node = node['return'];
      }
      node.sibling['return'] = node['return'];
      node = node.sibling;
    }
    // Flow needs the return null here, but ESLint complains about it.
    // eslint-disable-next-line no-unreachable
    return null;
  }
  
  function findCurrentHostFiberWithNoPortals(parent) {
    var currentParent = findCurrentFiberUsingSlowPath(parent);
    if (!currentParent) {
      return null;
    }
  
    // Next we'll drill down this component to find the first HostComponent/Text.
    var node = currentParent;
    while (true) {
      if (node.tag === HostComponent || node.tag === HostText) {
        return node;
      } else if (node.child && node.tag !== HostPortal) {
        node.child['return'] = node;
        node = node.child;
        continue;
      }
      if (node === currentParent) {
        return null;
      }
      while (!node.sibling) {
        if (!node['return'] || node['return'] === currentParent) {
          return null;
        }
        node = node['return'];
      }
      node.sibling['return'] = node['return'];
      node = node.sibling;
    }
    // Flow needs the return null here, but ESLint complains about it.
    // eslint-disable-next-line no-unreachable
    return null;
  }
  
  /**
   * Copyright (c) 2013-present, Facebook, Inc.
   *
   * This source code is licensed under the MIT license found in the
   * LICENSE file in the root directory of this source tree.
   *
   * @typechecks
   */
  
  
  
  /**
   * Upstream version of event listener. Does not take into account specific
   * nature of platform.
   */
  var EventListener = {
    /**
     * Listen to DOM events during the bubble phase.
     *
     * @param {DOMEventTarget} target DOM element to register listener on.
     * @param {string} eventType Event type, e.g. 'click' or 'mouseover'.
     * @param {function} callback Callback function.
     * @return {object} Object with a `remove` method.
     */
    listen: function listen(target, eventType, callback) {
      if (target.addEventListener) {
        target.addEventListener(eventType, callback, false);
        return {
          remove: function remove() {
            target.removeEventListener(eventType, callback, false);
          }
        };
      } else if (target.attachEvent) {
        target.attachEvent('on' + eventType, callback);
        return {
          remove: function remove() {
            target.detachEvent('on' + eventType, callback);
          }
        };
      }
    },
  
    /**
     * Listen to DOM events during the capture phase.
     *
     * @param {DOMEventTarget} target DOM element to register listener on.
     * @param {string} eventType Event type, e.g. 'click' or 'mouseover'.
     * @param {function} callback Callback function.
     * @return {object} Object with a `remove` method.
     */
    capture: function capture(target, eventType, callback) {
      if (target.addEventListener) {
        target.addEventListener(eventType, callback, true);
        return {
          remove: function remove() {
            target.removeEventListener(eventType, callback, true);
          }
        };
      } else {
        {
          console.error('Attempted to listen to events during the capture phase on a ' + 'browser that does not support the capture phase. Your application ' + 'will not receive some events.');
        }
        return {
          remove: emptyFunction_1
        };
      }
    },
  
    registerDefault: function registerDefault() {}
  };
  
  var EventListener_1 = EventListener;
  
  var CALLBACK_BOOKKEEPING_POOL_SIZE = 10;
  var callbackBookkeepingPool = [];
  
  /**
   * Find the deepest React component completely containing the root of the
   * passed-in instance (for use when entire React trees are nested within each
   * other). If React trees are not nested, returns null.
   */
  function findRootContainerNode(inst) {
    // TODO: It may be a good idea to cache this to prevent unnecessary DOM
    // traversal, but caching is difficult to do correctly without using a
    // mutation observer to listen for all DOM changes.
    while (inst['return']) {
      inst = inst['return'];
    }
    if (inst.tag !== HostRoot) {
      // This can happen if we're in a detached tree.
      return null;
    }
    return inst.stateNode.containerInfo;
  }
  
  // Used to store ancestor hierarchy in top level callback
  function getTopLevelCallbackBookKeeping(topLevelType, nativeEvent, targetInst) {
    if (callbackBookkeepingPool.length) {
      var instance = callbackBookkeepingPool.pop();
      instance.topLevelType = topLevelType;
      instance.nativeEvent = nativeEvent;
      instance.targetInst = targetInst;
      return instance;
    }
    return {
      topLevelType: topLevelType,
      nativeEvent: nativeEvent,
      targetInst: targetInst,
      ancestors: []
    };
  }
  
  function releaseTopLevelCallbackBookKeeping(instance) {
    instance.topLevelType = null;
    instance.nativeEvent = null;
    instance.targetInst = null;
    instance.ancestors.length = 0;
    if (callbackBookkeepingPool.length < CALLBACK_BOOKKEEPING_POOL_SIZE) {
      callbackBookkeepingPool.push(instance);
    }
  }
  
  function handleTopLevelImpl(bookKeeping) {
    var targetInst = bookKeeping.targetInst;
  
    // Loop through the hierarchy, in case there's any nested components.
    // It's important that we build the array of ancestors before calling any
    // event handlers, because event handlers can modify the DOM, leading to
    // inconsistencies with ReactMount's node cache. See #1105.
    var ancestor = targetInst;
    do {
      if (!ancestor) {
        bookKeeping.ancestors.push(ancestor);
        break;
      }
      var root = findRootContainerNode(ancestor);
      if (!root) {
        break;
      }
      bookKeeping.ancestors.push(ancestor);
      ancestor = getClosestInstanceFromNode(root);
    } while (ancestor);
  
    for (var i = 0; i < bookKeeping.ancestors.length; i++) {
      targetInst = bookKeeping.ancestors[i];
      _handleTopLevel(bookKeeping.topLevelType, targetInst, bookKeeping.nativeEvent, getEventTarget(bookKeeping.nativeEvent));
    }
  }
  
  // TODO: can we stop exporting these?
  var _enabled = true;
  var _handleTopLevel = void 0;
  
  function setHandleTopLevel(handleTopLevel) {
    _handleTopLevel = handleTopLevel;
  }
  
  function setEnabled(enabled) {
    _enabled = !!enabled;
  }
  
  function isEnabled() {
    return _enabled;
  }
  
  /**
   * Traps top-level events by using event bubbling.
   *
   * @param {string} topLevelType Record from `BrowserEventConstants`.
   * @param {string} handlerBaseName Event name (e.g. "click").
   * @param {object} element Element on which to attach listener.
   * @return {?object} An object with a remove function which will forcefully
   *                  remove the listener.
   * @internal
   */
  function trapBubbledEvent(topLevelType, handlerBaseName, element) {
    if (!element) {
      return null;
    }
    return EventListener_1.listen(element, handlerBaseName, dispatchEvent.bind(null, topLevelType));
  }
  
  /**
   * Traps a top-level event by using event capturing.
   *
   * @param {string} topLevelType Record from `BrowserEventConstants`.
   * @param {string} handlerBaseName Event name (e.g. "click").
   * @param {object} element Element on which to attach listener.
   * @return {?object} An object with a remove function which will forcefully
   *                  remove the listener.
   * @internal
   */
  function trapCapturedEvent(topLevelType, handlerBaseName, element) {
    if (!element) {
      return null;
    }
    return EventListener_1.capture(element, handlerBaseName, dispatchEvent.bind(null, topLevelType));
  }
  
  function dispatchEvent(topLevelType, nativeEvent) {
    if (!_enabled) {
      return;
    }
  
    var nativeEventTarget = getEventTarget(nativeEvent);
    var targetInst = getClosestInstanceFromNode(nativeEventTarget);
    if (targetInst !== null && typeof targetInst.tag === 'number' && !isFiberMounted(targetInst)) {
      // If we get an event (ex: img onload) before committing that
      // component's mount, ignore it for now (that is, treat it as if it was an
      // event on a non-React tree). We might also consider queueing events and
      // dispatching them after the mount.
      targetInst = null;
    }
  
    var bookKeeping = getTopLevelCallbackBookKeeping(topLevelType, nativeEvent, targetInst);
  
    try {
      // Event queue being processed in the same cycle allows
      // `preventDefault`.
      batchedUpdates(handleTopLevelImpl, bookKeeping);
    } finally {
      releaseTopLevelCallbackBookKeeping(bookKeeping);
    }
  }
  
  var ReactDOMEventListener = Object.freeze({
  	get _enabled () { return _enabled; },
  	get _handleTopLevel () { return _handleTopLevel; },
  	setHandleTopLevel: setHandleTopLevel,
  	setEnabled: setEnabled,
  	isEnabled: isEnabled,
  	trapBubbledEvent: trapBubbledEvent,
  	trapCapturedEvent: trapCapturedEvent,
  	dispatchEvent: dispatchEvent
  });
  
  /**
   * Generate a mapping of standard vendor prefixes using the defined style property and event name.
   *
   * @param {string} styleProp
   * @param {string} eventName
   * @returns {object}
   */
  function makePrefixMap(styleProp, eventName) {
    var prefixes = {};
  
    prefixes[styleProp.toLowerCase()] = eventName.toLowerCase();
    prefixes['Webkit' + styleProp] = 'webkit' + eventName;
    prefixes['Moz' + styleProp] = 'moz' + eventName;
    prefixes['ms' + styleProp] = 'MS' + eventName;
    prefixes['O' + styleProp] = 'o' + eventName.toLowerCase();
  
    return prefixes;
  }
  
  /**
   * A list of event names to a configurable list of vendor prefixes.
   */
  var vendorPrefixes = {
    animationend: makePrefixMap('Animation', 'AnimationEnd'),
    animationiteration: makePrefixMap('Animation', 'AnimationIteration'),
    animationstart: makePrefixMap('Animation', 'AnimationStart'),
    transitionend: makePrefixMap('Transition', 'TransitionEnd')
  };
  
  /**
   * Event names that have already been detected and prefixed (if applicable).
   */
  var prefixedEventNames = {};
  
  /**
   * Element to check for prefixes on.
   */
  var style = {};
  
  /**
   * Bootstrap if a DOM exists.
   */
  if (ExecutionEnvironment_1.canUseDOM) {
    style = document.createElement('div').style;
  
    // On some platforms, in particular some releases of Android 4.x,
    // the un-prefixed "animation" and "transition" properties are defined on the
    // style object but the events that fire will still be prefixed, so we need
    // to check if the un-prefixed events are usable, and if not remove them from the map.
    if (!('AnimationEvent' in window)) {
      delete vendorPrefixes.animationend.animation;
      delete vendorPrefixes.animationiteration.animation;
      delete vendorPrefixes.animationstart.animation;
    }
  
    // Same as above
    if (!('TransitionEvent' in window)) {
      delete vendorPrefixes.transitionend.transition;
    }
  }
  
  /**
   * Attempts to determine the correct vendor prefixed event name.
   *
   * @param {string} eventName
   * @returns {string}
   */
  function getVendorPrefixedEventName(eventName) {
    if (prefixedEventNames[eventName]) {
      return prefixedEventNames[eventName];
    } else if (!vendorPrefixes[eventName]) {
      return eventName;
    }
  
    var prefixMap = vendorPrefixes[eventName];
  
    for (var styleProp in prefixMap) {
      if (prefixMap.hasOwnProperty(styleProp) && styleProp in style) {
        return prefixedEventNames[eventName] = prefixMap[styleProp];
      }
    }
  
    return '';
  }
  
  /**
   * Types of raw signals from the browser caught at the top level.
   *
   * For events like 'submit' which don't consistently bubble (which we
   * trap at a lower node than `document`), binding at `document` would
   * cause duplicate events so we don't include them here.
   */
  var topLevelTypes$1 = {
    topAbort: 'abort',
    topAnimationEnd: getVendorPrefixedEventName('animationend') || 'animationend',
    topAnimationIteration: getVendorPrefixedEventName('animationiteration') || 'animationiteration',
    topAnimationStart: getVendorPrefixedEventName('animationstart') || 'animationstart',
    topBlur: 'blur',
    topCancel: 'cancel',
    topCanPlay: 'canplay',
    topCanPlayThrough: 'canplaythrough',
    topChange: 'change',
    topClick: 'click',
    topClose: 'close',
    topCompositionEnd: 'compositionend',
    topCompositionStart: 'compositionstart',
    topCompositionUpdate: 'compositionupdate',
    topContextMenu: 'contextmenu',
    topCopy: 'copy',
    topCut: 'cut',
    topDoubleClick: 'dblclick',
    topDrag: 'drag',
    topDragEnd: 'dragend',
    topDragEnter: 'dragenter',
    topDragExit: 'dragexit',
    topDragLeave: 'dragleave',
    topDragOver: 'dragover',
    topDragStart: 'dragstart',
    topDrop: 'drop',
    topDurationChange: 'durationchange',
    topEmptied: 'emptied',
    topEncrypted: 'encrypted',
    topEnded: 'ended',
    topError: 'error',
    topFocus: 'focus',
    topInput: 'input',
    topKeyDown: 'keydown',
    topKeyPress: 'keypress',
    topKeyUp: 'keyup',
    topLoadedData: 'loadeddata',
    topLoad: 'load',
    topLoadedMetadata: 'loadedmetadata',
    topLoadStart: 'loadstart',
    topMouseDown: 'mousedown',
    topMouseMove: 'mousemove',
    topMouseOut: 'mouseout',
    topMouseOver: 'mouseover',
    topMouseUp: 'mouseup',
    topPaste: 'paste',
    topPause: 'pause',
    topPlay: 'play',
    topPlaying: 'playing',
    topProgress: 'progress',
    topRateChange: 'ratechange',
    topScroll: 'scroll',
    topSeeked: 'seeked',
    topSeeking: 'seeking',
    topSelectionChange: 'selectionchange',
    topStalled: 'stalled',
    topSuspend: 'suspend',
    topTextInput: 'textInput',
    topTimeUpdate: 'timeupdate',
    topToggle: 'toggle',
    topTouchCancel: 'touchcancel',
    topTouchEnd: 'touchend',
    topTouchMove: 'touchmove',
    topTouchStart: 'touchstart',
    topTransitionEnd: getVendorPrefixedEventName('transitionend') || 'transitionend',
    topVolumeChange: 'volumechange',
    topWaiting: 'waiting',
    topWheel: 'wheel'
  };
  
  var BrowserEventConstants = {
    topLevelTypes: topLevelTypes$1
  };
  
  function runEventQueueInBatch(events) {
    enqueueEvents(events);
    processEventQueue(false);
  }
  
  /**
   * Streams a fired top-level event to `EventPluginHub` where plugins have the
   * opportunity to create `ReactEvent`s to be dispatched.
   */
  function handleTopLevel(topLevelType, targetInst, nativeEvent, nativeEventTarget) {
    var events = extractEvents(topLevelType, targetInst, nativeEvent, nativeEventTarget);
    runEventQueueInBatch(events);
  }
  
  var topLevelTypes = BrowserEventConstants.topLevelTypes;
  
  /**
   * Summary of `ReactBrowserEventEmitter` event handling:
   *
   *  - Top-level delegation is used to trap most native browser events. This
   *    may only occur in the main thread and is the responsibility of
   *    ReactDOMEventListener, which is injected and can therefore support
   *    pluggable event sources. This is the only work that occurs in the main
   *    thread.
   *
   *  - We normalize and de-duplicate events to account for browser quirks. This
   *    may be done in the worker thread.
   *
   *  - Forward these native events (with the associated top-level type used to
   *    trap it) to `EventPluginHub`, which in turn will ask plugins if they want
   *    to extract any synthetic events.
   *
   *  - The `EventPluginHub` will then process each event by annotating them with
   *    "dispatches", a sequence of listeners and IDs that care about that event.
   *
   *  - The `EventPluginHub` then dispatches the events.
   *
   * Overview of React and the event system:
   *
   * +------------+    .
   * |    DOM     |    .
   * +------------+    .
   *       |           .
   *       v           .
   * +------------+    .
   * | ReactEvent |    .
   * |  Listener  |    .
   * +------------+    .                         +-----------+
   *       |           .               +--------+|SimpleEvent|
   *       |           .               |         |Plugin     |
   * +-----|------+    .               v         +-----------+
   * |     |      |    .    +--------------+                    +------------+
   * |     +-----------.--->|EventPluginHub|                    |    Event   |
   * |            |    .    |              |     +-----------+  | Propagators|
   * | ReactEvent |    .    |              |     |TapEvent   |  |------------|
   * |  Emitter   |    .    |              |<---+|Plugin     |  |other plugin|
   * |            |    .    |              |     +-----------+  |  utilities |
   * |     +-----------.--->|              |                    +------------+
   * |     |      |    .    +--------------+
   * +-----|------+    .                ^        +-----------+
   *       |           .                |        |Enter/Leave|
   *       +           .                +-------+|Plugin     |
   * +-------------+   .                         +-----------+
   * | application |   .
   * |-------------|   .
   * |             |   .
   * |             |   .
   * +-------------+   .
   *                   .
   *    React Core     .  General Purpose Event Plugin System
   */
  
  var alreadyListeningTo = {};
  var reactTopListenersCounter = 0;
  
  /**
   * To ensure no conflicts with other potential React instances on the page
   */
  var topListenersIDKey = '_reactListenersID' + ('' + Math.random()).slice(2);
  
  function getListeningForDocument(mountAt) {
    // In IE8, `mountAt` is a host object and doesn't have `hasOwnProperty`
    // directly.
    if (!Object.prototype.hasOwnProperty.call(mountAt, topListenersIDKey)) {
      mountAt[topListenersIDKey] = reactTopListenersCounter++;
      alreadyListeningTo[mountAt[topListenersIDKey]] = {};
    }
    return alreadyListeningTo[mountAt[topListenersIDKey]];
  }
  
  /**
   * We listen for bubbled touch events on the document object.
   *
   * Firefox v8.01 (and possibly others) exhibited strange behavior when
   * mounting `onmousemove` events at some node that was not the document
   * element. The symptoms were that if your mouse is not moving over something
   * contained within that mount point (for example on the background) the
   * top-level listeners for `onmousemove` won't be called. However, if you
   * register the `mousemove` on the document object, then it will of course
   * catch all `mousemove`s. This along with iOS quirks, justifies restricting
   * top-level listeners to the document object only, at least for these
   * movement types of events and possibly all events.
   *
   * @see http://www.quirksmode.org/blog/archives/2010/09/click_event_del.html
   *
   * Also, `keyup`/`keypress`/`keydown` do not bubble to the window on IE, but
   * they bubble to document.
   *
   * @param {string} registrationName Name of listener (e.g. `onClick`).
   * @param {object} contentDocumentHandle Document which owns the container
   */
  function listenTo(registrationName, contentDocumentHandle) {
    var mountAt = contentDocumentHandle;
    var isListening = getListeningForDocument(mountAt);
    var dependencies = registrationNameDependencies[registrationName];
  
    for (var i = 0; i < dependencies.length; i++) {
      var dependency = dependencies[i];
      if (!(isListening.hasOwnProperty(dependency) && isListening[dependency])) {
        if (dependency === 'topWheel') {
          if (isEventSupported('wheel')) {
            trapBubbledEvent('topWheel', 'wheel', mountAt);
          } else if (isEventSupported('mousewheel')) {
            trapBubbledEvent('topWheel', 'mousewheel', mountAt);
          } else {
            // Firefox needs to capture a different mouse scroll event.
            // @see http://www.quirksmode.org/dom/events/tests/scroll.html
            trapBubbledEvent('topWheel', 'DOMMouseScroll', mountAt);
          }
        } else if (dependency === 'topScroll') {
          trapCapturedEvent('topScroll', 'scroll', mountAt);
        } else if (dependency === 'topFocus' || dependency === 'topBlur') {
          trapCapturedEvent('topFocus', 'focus', mountAt);
          trapCapturedEvent('topBlur', 'blur', mountAt);
  
          // to make sure blur and focus event listeners are only attached once
          isListening.topBlur = true;
          isListening.topFocus = true;
        } else if (dependency === 'topCancel') {
          if (isEventSupported('cancel', true)) {
            trapCapturedEvent('topCancel', 'cancel', mountAt);
          }
          isListening.topCancel = true;
        } else if (dependency === 'topClose') {
          if (isEventSupported('close', true)) {
            trapCapturedEvent('topClose', 'close', mountAt);
          }
          isListening.topClose = true;
        } else if (topLevelTypes.hasOwnProperty(dependency)) {
          trapBubbledEvent(dependency, topLevelTypes[dependency], mountAt);
        }
  
        isListening[dependency] = true;
      }
    }
  }
  
  function isListeningToAllDependencies(registrationName, mountAt) {
    var isListening = getListeningForDocument(mountAt);
    var dependencies = registrationNameDependencies[registrationName];
    for (var i = 0; i < dependencies.length; i++) {
      var dependency = dependencies[i];
      if (!(isListening.hasOwnProperty(dependency) && isListening[dependency])) {
        return false;
      }
    }
    return true;
  }
  
  /**
   * Copyright (c) 2013-present, Facebook, Inc.
   *
   * This source code is licensed under the MIT license found in the
   * LICENSE file in the root directory of this source tree.
   *
   * @typechecks
   */
  
  /* eslint-disable fb-www/typeof-undefined */
  
  /**
   * Same as document.activeElement but wraps in a try-catch block. In IE it is
   * not safe to call document.activeElement if there is nothing focused.
   *
   * The activeElement will be null only if the document or document body is not
   * yet defined.
   *
   * @param {?DOMDocument} doc Defaults to current document.
   * @return {?DOMElement}
   */
  function getActiveElement(doc) /*?DOMElement*/{
    doc = doc || (typeof document !== 'undefined' ? document : undefined);
    if (typeof doc === 'undefined') {
      return null;
    }
    try {
      return doc.activeElement || doc.body;
    } catch (e) {
      return doc.body;
    }
  }
  
  var getActiveElement_1$1 = getActiveElement;
  
  /**
   * Copyright (c) 2013-present, Facebook, Inc.
   *
   * This source code is licensed under the MIT license found in the
   * LICENSE file in the root directory of this source tree.
   *
   * @typechecks
   * 
   */
  
  /*eslint-disable no-self-compare */
  
  
  
  var hasOwnProperty = Object.prototype.hasOwnProperty;
  
  /**
   * inlined Object.is polyfill to avoid requiring consumers ship their own
   * https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/is
   */
  function is(x, y) {
    // SameValue algorithm
    if (x === y) {
      // Steps 1-5, 7-10
      // Steps 6.b-6.e: +0 != -0
      // Added the nonzero y check to make Flow happy, but it is redundant
      return x !== 0 || y !== 0 || 1 / x === 1 / y;
    } else {
      // Step 6.a: NaN == NaN
      return x !== x && y !== y;
    }
  }
  
  /**
   * Performs equality by iterating through keys on an object and returning false
   * when any key has values which are not strictly equal between the arguments.
   * Returns true when the values of all keys are strictly equal.
   */
  function shallowEqual(objA, objB) {
    if (is(objA, objB)) {
      return true;
    }
  
    if (typeof objA !== 'object' || objA === null || typeof objB !== 'object' || objB === null) {
      return false;
    }
  
    var keysA = Object.keys(objA);
    var keysB = Object.keys(objB);
  
    if (keysA.length !== keysB.length) {
      return false;
    }
  
    // Test for A's keys different from B.
    for (var i = 0; i < keysA.length; i++) {
      if (!hasOwnProperty.call(objB, keysA[i]) || !is(objA[keysA[i]], objB[keysA[i]])) {
        return false;
      }
    }
  
    return true;
  }
  
  var shallowEqual_1$1 = shallowEqual;
  
  /**
   * Copyright (c) 2013-present, Facebook, Inc.
   *
   * This source code is licensed under the MIT license found in the
   * LICENSE file in the root directory of this source tree.
   *
   * @typechecks
   */
  
  /**
   * @param {*} object The object to check.
   * @return {boolean} Whether or not the object is a DOM node.
   */
  function isNode(object) {
    var doc = object ? object.ownerDocument || object : document;
    var defaultView = doc.defaultView || window;
    return !!(object && (typeof defaultView.Node === 'function' ? object instanceof defaultView.Node : typeof object === 'object' && typeof object.nodeType === 'number' && typeof object.nodeName === 'string'));
  }
  
  var isNode_1 = isNode;
  
  /**
   * Copyright (c) 2013-present, Facebook, Inc.
   *
   * This source code is licensed under the MIT license found in the
   * LICENSE file in the root directory of this source tree.
   *
   * @typechecks
   */
  
  
  
  /**
   * @param {*} object The object to check.
   * @return {boolean} Whether or not the object is a DOM text node.
   */
  function isTextNode(object) {
    return isNode_1(object) && object.nodeType == 3;
  }
  
  var isTextNode_1 = isTextNode;
  
  /**
   * Copyright (c) 2013-present, Facebook, Inc.
   *
   * This source code is licensed under the MIT license found in the
   * LICENSE file in the root directory of this source tree.
   *
   * 
   */
  
  
  
  /*eslint-disable no-bitwise */
  
  /**
   * Checks if a given DOM node contains or is another DOM node.
   */
  function containsNode(outerNode, innerNode) {
    if (!outerNode || !innerNode) {
      return false;
    } else if (outerNode === innerNode) {
      return true;
    } else if (isTextNode_1(outerNode)) {
      return false;
    } else if (isTextNode_1(innerNode)) {
      return containsNode(outerNode, innerNode.parentNode);
    } else if ('contains' in outerNode) {
      return outerNode.contains(innerNode);
    } else if (outerNode.compareDocumentPosition) {
      return !!(outerNode.compareDocumentPosition(innerNode) & 16);
    } else {
      return false;
    }
  }
  
  var containsNode_1$1 = containsNode;
  
  /**
   * Copyright (c) 2013-present, Facebook, Inc.
   *
   * This source code is licensed under the MIT license found in the
   * LICENSE file in the root directory of this source tree.
   *
   */
  
  
  
  /**
   * @param {DOMElement} node input/textarea to focus
   */
  
  function focusNode(node) {
    // IE8 can throw "Can't move focus to the control because it is invisible,
    // not enabled, or of a type that does not accept the focus." for all kinds of
    // reasons that are too expensive and fragile to test.
    try {
      node.focus();
    } catch (e) {}
  }
  
  var focusNode_1$1 = focusNode;
  
  /**
   * Given any node return the first leaf node without children.
   *
   * @param {DOMElement|DOMTextNode} node
   * @return {DOMElement|DOMTextNode}
   */
  function getLeafNode(node) {
    while (node && node.firstChild) {
      node = node.firstChild;
    }
    return node;
  }
  
  /**
   * Get the next sibling within a container. This will walk up the
   * DOM if a node's siblings have been exhausted.
   *
   * @param {DOMElement|DOMTextNode} node
   * @return {?DOMElement|DOMTextNode}
   */
  function getSiblingNode(node) {
    while (node) {
      if (node.nextSibling) {
        return node.nextSibling;
      }
      node = node.parentNode;
    }
  }
  
  /**
   * Get object describing the nodes which contain characters at offset.
   *
   * @param {DOMElement|DOMTextNode} root
   * @param {number} offset
   * @return {?object}
   */
  function getNodeForCharacterOffset(root, offset) {
    var node = getLeafNode(root);
    var nodeStart = 0;
    var nodeEnd = 0;
  
    while (node) {
      if (node.nodeType === TEXT_NODE) {
        nodeEnd = nodeStart + node.textContent.length;
  
        if (nodeStart <= offset && nodeEnd >= offset) {
          return {
            node: node,
            offset: offset - nodeStart
          };
        }
  
        nodeStart = nodeEnd;
      }
  
      node = getLeafNode(getSiblingNode(node));
    }
  }
  
  /**
   * @param {DOMElement} outerNode
   * @return {?object}
   */
  function getOffsets(outerNode) {
    var selection = window.getSelection && window.getSelection();
  
    if (!selection || selection.rangeCount === 0) {
      return null;
    }
  
    var anchorNode = selection.anchorNode;
    var anchorOffset = selection.anchorOffset;
    var focusNode = selection.focusNode;
    var focusOffset = selection.focusOffset;
  
    // In Firefox, anchorNode and focusNode can be "anonymous divs", e.g. the
    // up/down buttons on an <input type="number">. Anonymous divs do not seem to
    // expose properties, triggering a "Permission denied error" if any of its
    // properties are accessed. The only seemingly possible way to avoid erroring
    // is to access a property that typically works for non-anonymous divs and
    // catch any error that may otherwise arise. See
    // https://bugzilla.mozilla.org/show_bug.cgi?id=208427
    try {
      /* eslint-disable no-unused-expressions */
      anchorNode.nodeType;
      focusNode.nodeType;
      /* eslint-enable no-unused-expressions */
    } catch (e) {
      return null;
    }
  
    return getModernOffsetsFromPoints(outerNode, anchorNode, anchorOffset, focusNode, focusOffset);
  }
  
  /**
   * Returns {start, end} where `start` is the character/codepoint index of
   * (anchorNode, anchorOffset) within the textContent of `outerNode`, and
   * `end` is the index of (focusNode, focusOffset).
   *
   * Returns null if you pass in garbage input but we should probably just crash.
   *
   * Exported only for testing.
   */
  function getModernOffsetsFromPoints(outerNode, anchorNode, anchorOffset, focusNode, focusOffset) {
    var length = 0;
    var start = -1;
    var end = -1;
    var indexWithinAnchor = 0;
    var indexWithinFocus = 0;
    var node = outerNode;
    var parentNode = null;
  
    outer: while (true) {
      var next = null;
  
      while (true) {
        if (node === anchorNode && (anchorOffset === 0 || node.nodeType === TEXT_NODE)) {
          start = length + anchorOffset;
        }
        if (node === focusNode && (focusOffset === 0 || node.nodeType === TEXT_NODE)) {
          end = length + focusOffset;
        }
  
        if (node.nodeType === TEXT_NODE) {
          length += node.nodeValue.length;
        }
  
        if ((next = node.firstChild) === null) {
          break;
        }
        // Moving from `node` to its first child `next`.
        parentNode = node;
        node = next;
      }
  
      while (true) {
        if (node === outerNode) {
          // If `outerNode` has children, this is always the second time visiting
          // it. If it has no children, this is still the first loop, and the only
          // valid selection is anchorNode and focusNode both equal to this node
          // and both offsets 0, in which case we will have handled above.
          break outer;
        }
        if (parentNode === anchorNode && ++indexWithinAnchor === anchorOffset) {
          start = length;
        }
        if (parentNode === focusNode && ++indexWithinFocus === focusOffset) {
          end = length;
        }
        if ((next = node.nextSibling) !== null) {
          break;
        }
        node = parentNode;
        parentNode = node.parentNode;
      }
  
      // Moving from `node` to its next sibling `next`.
      node = next;
    }
  
    if (start === -1 || end === -1) {
      // This should never happen. (Would happen if the anchor/focus nodes aren't
      // actually inside the passed-in node.)
      return null;
    }
  
    return {
      start: start,
      end: end
    };
  }
  
  /**
   * In modern non-IE browsers, we can support both forward and backward
   * selections.
   *
   * Note: IE10+ supports the Selection object, but it does not support
   * the `extend` method, which means that even in modern IE, it's not possible
   * to programmatically create a backward selection. Thus, for all IE
   * versions, we use the old IE API to create our selections.
   *
   * @param {DOMElement|DOMTextNode} node
   * @param {object} offsets
   */
  function setOffsets(node, offsets) {
    if (!window.getSelection) {
      return;
    }
  
    var selection = window.getSelection();
    var length = node[getTextContentAccessor()].length;
    var start = Math.min(offsets.start, length);
    var end = offsets.end === undefined ? start : Math.min(offsets.end, length);
  
    // IE 11 uses modern selection, but doesn't support the extend method.
    // Flip backward selections, so we can set with a single range.
    if (!selection.extend && start > end) {
      var temp = end;
      end = start;
      start = temp;
    }
  
    var startMarker = getNodeForCharacterOffset(node, start);
    var endMarker = getNodeForCharacterOffset(node, end);
  
    if (startMarker && endMarker) {
      if (selection.rangeCount === 1 && selection.anchorNode === startMarker.node && selection.anchorOffset === startMarker.offset && selection.focusNode === endMarker.node && selection.focusOffset === endMarker.offset) {
        return;
      }
      var range = document.createRange();
      range.setStart(startMarker.node, startMarker.offset);
      selection.removeAllRanges();
  
      if (start > end) {
        selection.addRange(range);
        selection.extend(endMarker.node, endMarker.offset);
      } else {
        range.setEnd(endMarker.node, endMarker.offset);
        selection.addRange(range);
      }
    }
  }
  
  function isInDocument(node) {
    return containsNode_1$1(document.documentElement, node);
  }
  
  /**
   * @ReactInputSelection: React input selection module. Based on Selection.js,
   * but modified to be suitable for react and has a couple of bug fixes (doesn't
   * assume buttons have range selections allowed).
   * Input selection module for React.
   */
  
  function hasSelectionCapabilities(elem) {
    var nodeName = elem && elem.nodeName && elem.nodeName.toLowerCase();
    return nodeName && (nodeName === 'input' && elem.type === 'text' || nodeName === 'textarea' || elem.contentEditable === 'true');
  }
  
  function getSelectionInformation() {
    var focusedElem = getActiveElement_1$1();
    return {
      focusedElem: focusedElem,
      selectionRange: hasSelectionCapabilities(focusedElem) ? getSelection$1(focusedElem) : null
    };
  }
  
  /**
   * @restoreSelection: If any selection information was potentially lost,
   * restore it. This is useful when performing operations that could remove dom
   * nodes and place them back in, resulting in focus being lost.
   */
  function restoreSelection(priorSelectionInformation) {
    var curFocusedElem = getActiveElement_1$1();
    var priorFocusedElem = priorSelectionInformation.focusedElem;
    var priorSelectionRange = priorSelectionInformation.selectionRange;
    if (curFocusedElem !== priorFocusedElem && isInDocument(priorFocusedElem)) {
      if (hasSelectionCapabilities(priorFocusedElem)) {
        setSelection(priorFocusedElem, priorSelectionRange);
      }
  
      // Focusing a node can change the scroll position, which is undesirable
      var ancestors = [];
      var ancestor = priorFocusedElem;
      while (ancestor = ancestor.parentNode) {
        if (ancestor.nodeType === ELEMENT_NODE) {
          ancestors.push({
            element: ancestor,
            left: ancestor.scrollLeft,
            top: ancestor.scrollTop
          });
        }
      }
  
      focusNode_1$1(priorFocusedElem);
  
      for (var i = 0; i < ancestors.length; i++) {
        var info = ancestors[i];
        info.element.scrollLeft = info.left;
        info.element.scrollTop = info.top;
      }
    }
  }
  
  /**
   * @getSelection: Gets the selection bounds of a focused textarea, input or
   * contentEditable node.
   * -@input: Look up selection bounds of this input
   * -@return {start: selectionStart, end: selectionEnd}
   */
  function getSelection$1(input) {
    var selection = void 0;
  
    if ('selectionStart' in input) {
      // Modern browser with input or textarea.
      selection = {
        start: input.selectionStart,
        end: input.selectionEnd
      };
    } else {
      // Content editable or old IE textarea.
      selection = getOffsets(input);
    }
  
    return selection || { start: 0, end: 0 };
  }
  
  /**
   * @setSelection: Sets the selection bounds of a textarea or input and focuses
   * the input.
   * -@input     Set selection bounds of this input or textarea
   * -@offsets   Object of same form that is returned from get*
   */
  function setSelection(input, offsets) {
    var start = offsets.start,
        end = offsets.end;
  
    if (end === undefined) {
      end = start;
    }
  
    if ('selectionStart' in input) {
      input.selectionStart = start;
      input.selectionEnd = Math.min(end, input.value.length);
    } else {
      setOffsets(input, offsets);
    }
  }
  
  var skipSelectionChangeEvent = ExecutionEnvironment_1.canUseDOM && 'documentMode' in document && document.documentMode <= 11;
  
  var eventTypes$3 = {
    select: {
      phasedRegistrationNames: {
        bubbled: 'onSelect',
        captured: 'onSelectCapture'
      },
      dependencies: ['topBlur', 'topContextMenu', 'topFocus', 'topKeyDown', 'topKeyUp', 'topMouseDown', 'topMouseUp', 'topSelectionChange']
    }
  };
  
  var activeElement$1 = null;
  var activeElementInst$1 = null;
  var lastSelection = null;
  var mouseDown = false;
  
  /**
   * Get an object which is a unique representation of the current selection.
   *
   * The return value will not be consistent across nodes or browsers, but
   * two identical selections on the same node will return identical objects.
   *
   * @param {DOMElement} node
   * @return {object}
   */
  function getSelection(node) {
    if ('selectionStart' in node && hasSelectionCapabilities(node)) {
      return {
        start: node.selectionStart,
        end: node.selectionEnd
      };
    } else if (window.getSelection) {
      var selection = window.getSelection();
      return {
        anchorNode: selection.anchorNode,
        anchorOffset: selection.anchorOffset,
        focusNode: selection.focusNode,
        focusOffset: selection.focusOffset
      };
    }
  }
  
  /**
   * Poll selection to see whether it's changed.
   *
   * @param {object} nativeEvent
   * @return {?SyntheticEvent}
   */
  function constructSelectEvent(nativeEvent, nativeEventTarget) {
    // Ensure we have the right element, and that the user is not dragging a
    // selection (this matches native `select` event behavior). In HTML5, select
    // fires only on input and textarea thus if there's no focused element we
    // won't dispatch.
    if (mouseDown || activeElement$1 == null || activeElement$1 !== getActiveElement_1$1()) {
      return null;
    }
  
    // Only fire when selection has actually changed.
    var currentSelection = getSelection(activeElement$1);
    if (!lastSelection || !shallowEqual_1$1(lastSelection, currentSelection)) {
      lastSelection = currentSelection;
  
      var syntheticEvent = SyntheticEvent$1.getPooled(eventTypes$3.select, activeElementInst$1, nativeEvent, nativeEventTarget);
  
      syntheticEvent.type = 'select';
      syntheticEvent.target = activeElement$1;
  
      accumulateTwoPhaseDispatches(syntheticEvent);
  
      return syntheticEvent;
    }
  
    return null;
  }
  
  /**
   * This plugin creates an `onSelect` event that normalizes select events
   * across form elements.
   *
   * Supported elements are:
   * - input (see `isTextInputElement`)
   * - textarea
   * - contentEditable
   *
   * This differs from native browser implementations in the following ways:
   * - Fires on contentEditable fields as well as inputs.
   * - Fires for collapsed selection.
   * - Fires after user input.
   */
  var SelectEventPlugin = {
    eventTypes: eventTypes$3,
  
    extractEvents: function (topLevelType, targetInst, nativeEvent, nativeEventTarget) {
      var doc = nativeEventTarget.window === nativeEventTarget ? nativeEventTarget.document : nativeEventTarget.nodeType === DOCUMENT_NODE ? nativeEventTarget : nativeEventTarget.ownerDocument;
      // Track whether all listeners exists for this plugin. If none exist, we do
      // not extract events. See #3639.
      if (!doc || !isListeningToAllDependencies('onSelect', doc)) {
        return null;
      }
  
      var targetNode = targetInst ? getNodeFromInstance$1(targetInst) : window;
  
      switch (topLevelType) {
        // Track the input node that has focus.
        case 'topFocus':
          if (isTextInputElement(targetNode) || targetNode.contentEditable === 'true') {
            activeElement$1 = targetNode;
            activeElementInst$1 = targetInst;
            lastSelection = null;
          }
          break;
        case 'topBlur':
          activeElement$1 = null;
          activeElementInst$1 = null;
          lastSelection = null;
          break;
        // Don't fire the event while the user is dragging. This matches the
        // semantics of the native select event.
        case 'topMouseDown':
          mouseDown = true;
          break;
        case 'topContextMenu':
        case 'topMouseUp':
          mouseDown = false;
          return constructSelectEvent(nativeEvent, nativeEventTarget);
        // Chrome and IE fire non-standard event when selection is changed (and
        // sometimes when it hasn't). IE's event fires out of order with respect
        // to key and input events on deletion, so we discard it.
        //
        // Firefox doesn't support selectionchange, so check selection status
        // after each key entry. The selection changes after keydown and before
        // keyup, but we check on keydown as well in the case of holding down a
        // key, when multiple keydown events are fired but only one keyup is.
        // This is also our approach for IE handling, for the reason above.
        case 'topSelectionChange':
          if (skipSelectionChangeEvent) {
            break;
          }
        // falls through
        case 'topKeyDown':
        case 'topKeyUp':
          return constructSelectEvent(nativeEvent, nativeEventTarget);
      }
  
      return null;
    }
  };
  
  /**
   * @interface Event
   * @see http://www.w3.org/TR/css3-animations/#AnimationEvent-interface
   * @see https://developer.mozilla.org/en-US/docs/Web/API/AnimationEvent
   */
  var AnimationEventInterface = {
    animationName: null,
    elapsedTime: null,
    pseudoElement: null
  };
  
  /**
   * @param {object} dispatchConfig Configuration used to dispatch this event.
   * @param {string} dispatchMarker Marker identifying the event target.
   * @param {object} nativeEvent Native browser event.
   * @extends {SyntheticEvent}
   */
  function SyntheticAnimationEvent(dispatchConfig, dispatchMarker, nativeEvent, nativeEventTarget) {
    return SyntheticEvent$1.call(this, dispatchConfig, dispatchMarker, nativeEvent, nativeEventTarget);
  }
  
  SyntheticEvent$1.augmentClass(SyntheticAnimationEvent, AnimationEventInterface);
  
  /**
   * @interface Event
   * @see http://www.w3.org/TR/clipboard-apis/
   */
  var ClipboardEventInterface = {
    clipboardData: function (event) {
      return 'clipboardData' in event ? event.clipboardData : window.clipboardData;
    }
  };
  
  /**
   * @param {object} dispatchConfig Configuration used to dispatch this event.
   * @param {string} dispatchMarker Marker identifying the event target.
   * @param {object} nativeEvent Native browser event.
   * @extends {SyntheticEvent}
   */
  function SyntheticClipboardEvent(dispatchConfig, dispatchMarker, nativeEvent, nativeEventTarget) {
    return SyntheticEvent$1.call(this, dispatchConfig, dispatchMarker, nativeEvent, nativeEventTarget);
  }
  
  SyntheticEvent$1.augmentClass(SyntheticClipboardEvent, ClipboardEventInterface);
  
  /**
   * @interface FocusEvent
   * @see http://www.w3.org/TR/DOM-Level-3-Events/
   */
  var FocusEventInterface = {
    relatedTarget: null
  };
  
  /**
   * @param {object} dispatchConfig Configuration used to dispatch this event.
   * @param {string} dispatchMarker Marker identifying the event target.
   * @param {object} nativeEvent Native browser event.
   * @extends {SyntheticUIEvent}
   */
  function SyntheticFocusEvent(dispatchConfig, dispatchMarker, nativeEvent, nativeEventTarget) {
    return SyntheticUIEvent.call(this, dispatchConfig, dispatchMarker, nativeEvent, nativeEventTarget);
  }
  
  SyntheticUIEvent.augmentClass(SyntheticFocusEvent, FocusEventInterface);
  
  /**
   * `charCode` represents the actual "character code" and is safe to use with
   * `String.fromCharCode`. As such, only keys that correspond to printable
   * characters produce a valid `charCode`, the only exception to this is Enter.
   * The Tab-key is considered non-printable and does not have a `charCode`,
   * presumably because it does not produce a tab-character in browsers.
   *
   * @param {object} nativeEvent Native browser event.
   * @return {number} Normalized `charCode` property.
   */
  function getEventCharCode(nativeEvent) {
    var charCode;
    var keyCode = nativeEvent.keyCode;
  
    if ('charCode' in nativeEvent) {
      charCode = nativeEvent.charCode;
  
      // FF does not set `charCode` for the Enter-key, check against `keyCode`.
      if (charCode === 0 && keyCode === 13) {
        charCode = 13;
      }
    } else {
      // IE8 does not implement `charCode`, but `keyCode` has the correct value.
      charCode = keyCode;
    }
  
    // Some non-printable keys are reported in `charCode`/`keyCode`, discard them.
    // Must not discard the (non-)printable Enter-key.
    if (charCode >= 32 || charCode === 13) {
      return charCode;
    }
  
    return 0;
  }
  
  /**
   * Normalization of deprecated HTML5 `key` values
   * @see https://developer.mozilla.org/en-US/docs/Web/API/KeyboardEvent#Key_names
   */
  var normalizeKey = {
    Esc: 'Escape',
    Spacebar: ' ',
    Left: 'ArrowLeft',
    Up: 'ArrowUp',
    Right: 'ArrowRight',
    Down: 'ArrowDown',
    Del: 'Delete',
    Win: 'OS',
    Menu: 'ContextMenu',
    Apps: 'ContextMenu',
    Scroll: 'ScrollLock',
    MozPrintableKey: 'Unidentified'
  };
  
  /**
   * Translation from legacy `keyCode` to HTML5 `key`
   * Only special keys supported, all others depend on keyboard layout or browser
   * @see https://developer.mozilla.org/en-US/docs/Web/API/KeyboardEvent#Key_names
   */
  var translateToKey = {
    '8': 'Backspace',
    '9': 'Tab',
    '12': 'Clear',
    '13': 'Enter',
    '16': 'Shift',
    '17': 'Control',
    '18': 'Alt',
    '19': 'Pause',
    '20': 'CapsLock',
    '27': 'Escape',
    '32': ' ',
    '33': 'PageUp',
    '34': 'PageDown',
    '35': 'End',
    '36': 'Home',
    '37': 'ArrowLeft',
    '38': 'ArrowUp',
    '39': 'ArrowRight',
    '40': 'ArrowDown',
    '45': 'Insert',
    '46': 'Delete',
    '112': 'F1',
    '113': 'F2',
    '114': 'F3',
    '115': 'F4',
    '116': 'F5',
    '117': 'F6',
    '118': 'F7',
    '119': 'F8',
    '120': 'F9',
    '121': 'F10',
    '122': 'F11',
    '123': 'F12',
    '144': 'NumLock',
    '145': 'ScrollLock',
    '224': 'Meta'
  };
  
  /**
   * @param {object} nativeEvent Native browser event.
   * @return {string} Normalized `key` property.
   */
  function getEventKey(nativeEvent) {
    if (nativeEvent.key) {
      // Normalize inconsistent values reported by browsers due to
      // implementations of a working draft specification.
  
      // FireFox implements `key` but returns `MozPrintableKey` for all
      // printable characters (normalized to `Unidentified`), ignore it.
      var key = normalizeKey[nativeEvent.key] || nativeEvent.key;
      if (key !== 'Unidentified') {
        return key;
      }
    }
  
    // Browser does not implement `key`, polyfill as much of it as we can.
    if (nativeEvent.type === 'keypress') {
      var charCode = getEventCharCode(nativeEvent);
  
      // The enter-key is technically both printable and non-printable and can
      // thus be captured by `keypress`, no other non-printable key should.
      return charCode === 13 ? 'Enter' : String.fromCharCode(charCode);
    }
    if (nativeEvent.type === 'keydown' || nativeEvent.type === 'keyup') {
      // While user keyboard layout determines the actual meaning of each
      // `keyCode` value, almost all function keys have a universal value.
      return translateToKey[nativeEvent.keyCode] || 'Unidentified';
    }
    return '';
  }
  
  /**
   * @interface KeyboardEvent
   * @see http://www.w3.org/TR/DOM-Level-3-Events/
   */
  var KeyboardEventInterface = {
    key: getEventKey,
    location: null,
    ctrlKey: null,
    shiftKey: null,
    altKey: null,
    metaKey: null,
    repeat: null,
    locale: null,
    getModifierState: getEventModifierState,
    // Legacy Interface
    charCode: function (event) {
      // `charCode` is the result of a KeyPress event and represents the value of
      // the actual printable character.
  
      // KeyPress is deprecated, but its replacement is not yet final and not
      // implemented in any major browser. Only KeyPress has charCode.
      if (event.type === 'keypress') {
        return getEventCharCode(event);
      }
      return 0;
    },
    keyCode: function (event) {
      // `keyCode` is the result of a KeyDown/Up event and represents the value of
      // physical keyboard key.
  
      // The actual meaning of the value depends on the users' keyboard layout
      // which cannot be detected. Assuming that it is a US keyboard layout
      // provides a surprisingly accurate mapping for US and European users.
      // Due to this, it is left to the user to implement at this time.
      if (event.type === 'keydown' || event.type === 'keyup') {
        return event.keyCode;
      }
      return 0;
    },
    which: function (event) {
      // `which` is an alias for either `keyCode` or `charCode` depending on the
      // type of the event.
      if (event.type === 'keypress') {
        return getEventCharCode(event);
      }
      if (event.type === 'keydown' || event.type === 'keyup') {
        return event.keyCode;
      }
      return 0;
    }
  };
  
  /**
   * @param {object} dispatchConfig Configuration used to dispatch this event.
   * @param {string} dispatchMarker Marker identifying the event target.
   * @param {object} nativeEvent Native browser event.
   * @extends {SyntheticUIEvent}
   */
  function SyntheticKeyboardEvent(dispatchConfig, dispatchMarker, nativeEvent, nativeEventTarget) {
    return SyntheticUIEvent.call(this, dispatchConfig, dispatchMarker, nativeEvent, nativeEventTarget);
  }
  
  SyntheticUIEvent.augmentClass(SyntheticKeyboardEvent, KeyboardEventInterface);
  
  /**
   * @interface DragEvent
   * @see http://www.w3.org/TR/DOM-Level-3-Events/
   */
  var DragEventInterface = {
    dataTransfer: null
  };
  
  /**
   * @param {object} dispatchConfig Configuration used to dispatch this event.
   * @param {string} dispatchMarker Marker identifying the event target.
   * @param {object} nativeEvent Native browser event.
   * @extends {SyntheticMouseEvent}
   */
  function SyntheticDragEvent(dispatchConfig, dispatchMarker, nativeEvent, nativeEventTarget) {
    return SyntheticMouseEvent.call(this, dispatchConfig, dispatchMarker, nativeEvent, nativeEventTarget);
  }
  
  SyntheticMouseEvent.augmentClass(SyntheticDragEvent, DragEventInterface);
  
  /**
   * @interface TouchEvent
   * @see http://www.w3.org/TR/touch-events/
   */
  var TouchEventInterface = {
    touches: null,
    targetTouches: null,
    changedTouches: null,
    altKey: null,
    metaKey: null,
    ctrlKey: null,
    shiftKey: null,
    getModifierState: getEventModifierState
  };
  
  /**
   * @param {object} dispatchConfig Configuration used to dispatch this event.
   * @param {string} dispatchMarker Marker identifying the event target.
   * @param {object} nativeEvent Native browser event.
   * @extends {SyntheticUIEvent}
   */
  function SyntheticTouchEvent(dispatchConfig, dispatchMarker, nativeEvent, nativeEventTarget) {
    return SyntheticUIEvent.call(this, dispatchConfig, dispatchMarker, nativeEvent, nativeEventTarget);
  }
  
  SyntheticUIEvent.augmentClass(SyntheticTouchEvent, TouchEventInterface);
  
  /**
   * @interface Event
   * @see http://www.w3.org/TR/2009/WD-css3-transitions-20090320/#transition-events-
   * @see https://developer.mozilla.org/en-US/docs/Web/API/TransitionEvent
   */
  var TransitionEventInterface = {
    propertyName: null,
    elapsedTime: null,
    pseudoElement: null
  };
  
  /**
   * @param {object} dispatchConfig Configuration used to dispatch this event.
   * @param {string} dispatchMarker Marker identifying the event target.
   * @param {object} nativeEvent Native browser event.
   * @extends {SyntheticEvent}
   */
  function SyntheticTransitionEvent(dispatchConfig, dispatchMarker, nativeEvent, nativeEventTarget) {
    return SyntheticEvent$1.call(this, dispatchConfig, dispatchMarker, nativeEvent, nativeEventTarget);
  }
  
  SyntheticEvent$1.augmentClass(SyntheticTransitionEvent, TransitionEventInterface);
  
  /**
   * @interface WheelEvent
   * @see http://www.w3.org/TR/DOM-Level-3-Events/
   */
  var WheelEventInterface = {
    deltaX: function (event) {
      return 'deltaX' in event ? event.deltaX : // Fallback to `wheelDeltaX` for Webkit and normalize (right is positive).
      'wheelDeltaX' in event ? -event.wheelDeltaX : 0;
    },
    deltaY: function (event) {
      return 'deltaY' in event ? event.deltaY : // Fallback to `wheelDeltaY` for Webkit and normalize (down is positive).
      'wheelDeltaY' in event ? -event.wheelDeltaY : // Fallback to `wheelDelta` for IE<9 and normalize (down is positive).
      'wheelDelta' in event ? -event.wheelDelta : 0;
    },
    deltaZ: null,
  
    // Browsers without "deltaMode" is reporting in raw wheel delta where one
    // notch on the scroll is always +/- 120, roughly equivalent to pixels.
    // A good approximation of DOM_DELTA_LINE (1) is 5% of viewport size or
    // ~40 pixels, for DOM_DELTA_SCREEN (2) it is 87.5% of viewport size.
    deltaMode: null
  };
  
  /**
   * @param {object} dispatchConfig Configuration used to dispatch this event.
   * @param {string} dispatchMarker Marker identifying the event target.
   * @param {object} nativeEvent Native browser event.
   * @extends {SyntheticMouseEvent}
   */
  function SyntheticWheelEvent(dispatchConfig, dispatchMarker, nativeEvent, nativeEventTarget) {
    return SyntheticMouseEvent.call(this, dispatchConfig, dispatchMarker, nativeEvent, nativeEventTarget);
  }
  
  SyntheticMouseEvent.augmentClass(SyntheticWheelEvent, WheelEventInterface);
  
  /**
   * Turns
   * ['abort', ...]
   * into
   * eventTypes = {
   *   'abort': {
   *     phasedRegistrationNames: {
   *       bubbled: 'onAbort',
   *       captured: 'onAbortCapture',
   *     },
   *     dependencies: ['topAbort'],
   *   },
   *   ...
   * };
   * topLevelEventsToDispatchConfig = {
   *   'topAbort': { sameConfig }
   * };
   */
  var eventTypes$4 = {};
  var topLevelEventsToDispatchConfig = {};
  ['abort', 'animationEnd', 'animationIteration', 'animationStart', 'blur', 'cancel', 'canPlay', 'canPlayThrough', 'click', 'close', 'contextMenu', 'copy', 'cut', 'doubleClick', 'drag', 'dragEnd', 'dragEnter', 'dragExit', 'dragLeave', 'dragOver', 'dragStart', 'drop', 'durationChange', 'emptied', 'encrypted', 'ended', 'error', 'focus', 'input', 'invalid', 'keyDown', 'keyPress', 'keyUp', 'load', 'loadedData', 'loadedMetadata', 'loadStart', 'mouseDown', 'mouseMove', 'mouseOut', 'mouseOver', 'mouseUp', 'paste', 'pause', 'play', 'playing', 'progress', 'rateChange', 'reset', 'scroll', 'seeked', 'seeking', 'stalled', 'submit', 'suspend', 'timeUpdate', 'toggle', 'touchCancel', 'touchEnd', 'touchMove', 'touchStart', 'transitionEnd', 'volumeChange', 'waiting', 'wheel'].forEach(function (event) {
    var capitalizedEvent = event[0].toUpperCase() + event.slice(1);
    var onEvent = 'on' + capitalizedEvent;
    var topEvent = 'top' + capitalizedEvent;
  
    var type = {
      phasedRegistrationNames: {
        bubbled: onEvent,
        captured: onEvent + 'Capture'
      },
      dependencies: [topEvent]
    };
    eventTypes$4[event] = type;
    topLevelEventsToDispatchConfig[topEvent] = type;
  });
  
  // Only used in DEV for exhaustiveness validation.
  var knownHTMLTopLevelTypes = ['topAbort', 'topCancel', 'topCanPlay', 'topCanPlayThrough', 'topClose', 'topDurationChange', 'topEmptied', 'topEncrypted', 'topEnded', 'topError', 'topInput', 'topInvalid', 'topLoad', 'topLoadedData', 'topLoadedMetadata', 'topLoadStart', 'topPause', 'topPlay', 'topPlaying', 'topProgress', 'topRateChange', 'topReset', 'topSeeked', 'topSeeking', 'topStalled', 'topSubmit', 'topSuspend', 'topTimeUpdate', 'topToggle', 'topVolumeChange', 'topWaiting'];
  
  var SimpleEventPlugin = {
    eventTypes: eventTypes$4,
  
    extractEvents: function (topLevelType, targetInst, nativeEvent, nativeEventTarget) {
      var dispatchConfig = topLevelEventsToDispatchConfig[topLevelType];
      if (!dispatchConfig) {
        return null;
      }
      var EventConstructor;
      switch (topLevelType) {
        case 'topKeyPress':
          // Firefox creates a keypress event for function keys too. This removes
          // the unwanted keypress events. Enter is however both printable and
          // non-printable. One would expect Tab to be as well (but it isn't).
          if (getEventCharCode(nativeEvent) === 0) {
            return null;
          }
        /* falls through */
        case 'topKeyDown':
        case 'topKeyUp':
          EventConstructor = SyntheticKeyboardEvent;
          break;
        case 'topBlur':
        case 'topFocus':
          EventConstructor = SyntheticFocusEvent;
          break;
        case 'topClick':
          // Firefox creates a click event on right mouse clicks. This removes the
          // unwanted click events.
          if (nativeEvent.button === 2) {
            return null;
          }
        /* falls through */
        case 'topDoubleClick':
        case 'topMouseDown':
        case 'topMouseMove':
        case 'topMouseUp':
        // TODO: Disabled elements should not respond to mouse events
        /* falls through */
        case 'topMouseOut':
        case 'topMouseOver':
        case 'topContextMenu':
          EventConstructor = SyntheticMouseEvent;
          break;
        case 'topDrag':
        case 'topDragEnd':
        case 'topDragEnter':
        case 'topDragExit':
        case 'topDragLeave':
        case 'topDragOver':
        case 'topDragStart':
        case 'topDrop':
          EventConstructor = SyntheticDragEvent;
          break;
        case 'topTouchCancel':
        case 'topTouchEnd':
        case 'topTouchMove':
        case 'topTouchStart':
          EventConstructor = SyntheticTouchEvent;
          break;
        case 'topAnimationEnd':
        case 'topAnimationIteration':
        case 'topAnimationStart':
          EventConstructor = SyntheticAnimationEvent;
          break;
        case 'topTransitionEnd':
          EventConstructor = SyntheticTransitionEvent;
          break;
        case 'topScroll':
          EventConstructor = SyntheticUIEvent;
          break;
        case 'topWheel':
          EventConstructor = SyntheticWheelEvent;
          break;
        case 'topCopy':
        case 'topCut':
        case 'topPaste':
          EventConstructor = SyntheticClipboardEvent;
          break;
        default:
          {
            if (knownHTMLTopLevelTypes.indexOf(topLevelType) === -1) {
              warning_1$1(false, 'SimpleEventPlugin: Unhandled event type, `%s`. This warning ' + 'is likely caused by a bug in React. Please file an issue.', topLevelType);
            }
          }
          // HTML Events
          // @see http://www.w3.org/TR/html5/index.html#events-0
          EventConstructor = SyntheticEvent$1;
          break;
      }
      var event = EventConstructor.getPooled(dispatchConfig, targetInst, nativeEvent, nativeEventTarget);
      accumulateTwoPhaseDispatches(event);
      return event;
    }
  };
  
  setHandleTopLevel(handleTopLevel);
  
  /**
   * Inject modules for resolving DOM hierarchy and plugin ordering.
   */
  injection$1.injectEventPluginOrder(DOMEventPluginOrder);
  injection$2.injectComponentTree(ReactDOMComponentTree);
  
  /**
   * Some important event plugins included by default (without having to require
   * them).
   */
  injection$1.injectEventPluginsByName({
    SimpleEventPlugin: SimpleEventPlugin,
    EnterLeaveEventPlugin: EnterLeaveEventPlugin,
    ChangeEventPlugin: ChangeEventPlugin,
    SelectEventPlugin: SelectEventPlugin,
    BeforeInputEventPlugin: BeforeInputEventPlugin
  });
  
  var enableAsyncSubtreeAPI = true;
  var enableAsyncSchedulingByDefaultInReactDOM = false;
  // Exports React.Fragment
  var enableReactFragment = false;
  // Exports ReactDOM.createRoot
  var enableCreateRoot = false;
  var enableUserTimingAPI = true;
  
  // Mutating mode (React DOM, React ART, React Native):
  var enableMutatingReconciler = true;
  // Experimental noop mode (currently unused):
  var enableNoopReconciler = false;
  // Experimental persistent mode (CS):
  var enablePersistentReconciler = false;
  
  // Only used in www builds.
  
  /**
   * Copyright (c) 2013-present, Facebook, Inc.
   *
   * This source code is licensed under the MIT license found in the
   * LICENSE file in the root directory of this source tree.
   *
   */
  
  
  
  var emptyObject = {};
  
  {
    Object.freeze(emptyObject);
  }
  
  var emptyObject_1 = emptyObject;
  
  /**
   * Copyright (c) 2013-present, Facebook, Inc.
   *
   * This source code is licensed under the MIT license found in the
   * LICENSE file in the root directory of this source tree.
   */
  
  
  
  var ReactPropTypesSecret$1 = 'SECRET_DO_NOT_PASS_THIS_OR_YOU_WILL_BE_FIRED';
  
  var ReactPropTypesSecret_1 = ReactPropTypesSecret$1;
  
  /**
   * Copyright (c) 2013-present, Facebook, Inc.
   *
   * This source code is licensed under the MIT license found in the
   * LICENSE file in the root directory of this source tree.
   */
  
  
  
  {
    var invariant$2 = invariant_1$1;
    var warning$2 = warning_1$1;
    var ReactPropTypesSecret = ReactPropTypesSecret_1;
    var loggedTypeFailures = {};
  }
  
  /**
   * Assert that the values match with the type specs.
   * Error messages are memorized and will only be shown once.
   *
   * @param {object} typeSpecs Map of name to a ReactPropType
   * @param {object} values Runtime values that need to be type-checked
   * @param {string} location e.g. "prop", "context", "child context"
   * @param {string} componentName Name of the component for error messages.
   * @param {?Function} getStack Returns the component stack.
   * @private
   */
  function checkPropTypes(typeSpecs, values, location, componentName, getStack) {
    {
      for (var typeSpecName in typeSpecs) {
        if (typeSpecs.hasOwnProperty(typeSpecName)) {
          var error;
          // Prop type validation may throw. In case they do, we don't want to
          // fail the render phase where it didn't fail before. So we log it.
          // After these have been cleaned up, we'll let them throw.
          try {
            // This is intentionally an invariant that gets caught. It's the same
            // behavior as without this statement except with a better message.
            invariant$2(typeof typeSpecs[typeSpecName] === 'function', '%s: %s type `%s` is invalid; it must be a function, usually from ' + 'the `prop-types` package, but received `%s`.', componentName || 'React class', location, typeSpecName, typeof typeSpecs[typeSpecName]);
            error = typeSpecs[typeSpecName](values, typeSpecName, componentName, location, null, ReactPropTypesSecret);
          } catch (ex) {
            error = ex;
          }
          warning$2(!error || error instanceof Error, '%s: type specification of %s `%s` is invalid; the type checker ' + 'function must return `null` or an `Error` but returned a %s. ' + 'You may have forgotten to pass an argument to the type checker ' + 'creator (arrayOf, instanceOf, objectOf, oneOf, oneOfType, and ' + 'shape all require an argument).', componentName || 'React class', location, typeSpecName, typeof error);
          if (error instanceof Error && !(error.message in loggedTypeFailures)) {
            // Only monitor this failure once because there tends to be a lot of the
            // same error.
            loggedTypeFailures[error.message] = true;
  
            var stack = getStack ? getStack() : '';
  
            warning$2(false, 'Failed %s type: %s%s', location, error.message, stack != null ? stack : '');
          }
        }
      }
    }
  }
  
  var checkPropTypes_1$1 = checkPropTypes;
  
  var valueStack = [];
  
  {
    var fiberStack = [];
  }
  
  var index = -1;
  
  function createCursor(defaultValue) {
    return {
      current: defaultValue
    };
  }
  
  
  
  function pop(cursor, fiber) {
    if (index < 0) {
      {
        warning_1$1(false, 'Unexpected pop.');
      }
      return;
    }
  
    {
      if (fiber !== fiberStack[index]) {
        warning_1$1(false, 'Unexpected Fiber popped.');
      }
    }
  
    cursor.current = valueStack[index];
  
    valueStack[index] = null;
  
    {
      fiberStack[index] = null;
    }
  
    index--;
  }
  
  function push(cursor, value, fiber) {
    index++;
  
    valueStack[index] = cursor.current;
  
    {
      fiberStack[index] = fiber;
    }
  
    cursor.current = value;
  }
  
  function reset$1() {
    while (index > -1) {
      valueStack[index] = null;
  
      {
        fiberStack[index] = null;
      }
  
      index--;
    }
  }
  
  var describeComponentFrame = function (name, source, ownerName) {
    return '\n    in ' + (name || 'Unknown') + (source ? ' (at ' + source.fileName.replace(/^.*[\\\/]/, '') + ':' + source.lineNumber + ')' : ownerName ? ' (created by ' + ownerName + ')' : '');
  };
  
  function describeFiber(fiber) {
    switch (fiber.tag) {
      case IndeterminateComponent:
      case FunctionalComponent:
      case ClassComponent:
      case HostComponent:
        var owner = fiber._debugOwner;
        var source = fiber._debugSource;
        var name = getComponentName(fiber);
        var ownerName = null;
        if (owner) {
          ownerName = getComponentName(owner);
        }
        return describeComponentFrame(name, source, ownerName);
      default:
        return '';
    }
  }
  
  // This function can only be called with a work-in-progress fiber and
  // only during begin or complete phase. Do not call it under any other
  // circumstances.
  function getStackAddendumByWorkInProgressFiber(workInProgress) {
    var info = '';
    var node = workInProgress;
    do {
      info += describeFiber(node);
      // Otherwise this return pointer might point to the wrong tree:
      node = node['return'];
    } while (node);
    return info;
  }
  
  function getCurrentFiberOwnerName() {
    {
      var fiber = ReactDebugCurrentFiber.current;
      if (fiber === null) {
        return null;
      }
      var owner = fiber._debugOwner;
      if (owner !== null && typeof owner !== 'undefined') {
        return getComponentName(owner);
      }
    }
    return null;
  }
  
  function getCurrentFiberStackAddendum() {
    {
      var fiber = ReactDebugCurrentFiber.current;
      if (fiber === null) {
        return null;
      }
      // Safe because if current fiber exists, we are reconciling,
      // and it is guaranteed to be the work-in-progress version.
      return getStackAddendumByWorkInProgressFiber(fiber);
    }
    return null;
  }
  
  function resetCurrentFiber() {
    ReactDebugCurrentFrame.getCurrentStack = null;
    ReactDebugCurrentFiber.current = null;
    ReactDebugCurrentFiber.phase = null;
  }
  
  function setCurrentFiber(fiber) {
    ReactDebugCurrentFrame.getCurrentStack = getCurrentFiberStackAddendum;
    ReactDebugCurrentFiber.current = fiber;
    ReactDebugCurrentFiber.phase = null;
  }
  
  function setCurrentPhase(phase) {
    ReactDebugCurrentFiber.phase = phase;
  }
  
  var ReactDebugCurrentFiber = {
    current: null,
    phase: null,
    resetCurrentFiber: resetCurrentFiber,
    setCurrentFiber: setCurrentFiber,
    setCurrentPhase: setCurrentPhase,
    getCurrentFiberOwnerName: getCurrentFiberOwnerName,
    getCurrentFiberStackAddendum: getCurrentFiberStackAddendum
  };
  
  // Prefix measurements so that it's possible to filter them.
  // Longer prefixes are hard to read in DevTools.
  var reactEmoji = '\u269B';
  var warningEmoji = '\u26D4';
  var supportsUserTiming = typeof performance !== 'undefined' && typeof performance.mark === 'function' && typeof performance.clearMarks === 'function' && typeof performance.measure === 'function' && typeof performance.clearMeasures === 'function';
  
  // Keep track of current fiber so that we know the path to unwind on pause.
  // TODO: this looks the same as nextUnitOfWork in scheduler. Can we unify them?
  var currentFiber = null;
  // If we're in the middle of user code, which fiber and method is it?
  // Reusing `currentFiber` would be confusing for this because user code fiber
  // can change during commit phase too, but we don't need to unwind it (since
  // lifecycles in the commit phase don't resemble a tree).
  var currentPhase = null;
  var currentPhaseFiber = null;
  // Did lifecycle hook schedule an update? This is often a performance problem,
  // so we will keep track of it, and include it in the report.
  // Track commits caused by cascading updates.
  var isCommitting = false;
  var hasScheduledUpdateInCurrentCommit = false;
  var hasScheduledUpdateInCurrentPhase = false;
  var commitCountInCurrentWorkLoop = 0;
  var effectCountInCurrentCommit = 0;
  var isWaitingForCallback = false;
  // During commits, we only show a measurement once per method name
  // to avoid stretch the commit phase with measurement overhead.
  var labelsInCurrentCommit = new Set();
  
  var formatMarkName = function (markName) {
    return reactEmoji + ' ' + markName;
  };
  
  var formatLabel = function (label, warning) {
    var prefix = warning ? warningEmoji + ' ' : reactEmoji + ' ';
    var suffix = warning ? ' Warning: ' + warning : '';
    return '' + prefix + label + suffix;
  };
  
  var beginMark = function (markName) {
    performance.mark(formatMarkName(markName));
  };
  
  var clearMark = function (markName) {
    performance.clearMarks(formatMarkName(markName));
  };
  
  var endMark = function (label, markName, warning) {
    var formattedMarkName = formatMarkName(markName);
    var formattedLabel = formatLabel(label, warning);
    try {
      performance.measure(formattedLabel, formattedMarkName);
    } catch (err) {}
    // If previous mark was missing for some reason, this will throw.
    // This could only happen if React crashed in an unexpected place earlier.
    // Don't pile on with more errors.
  
    // Clear marks immediately to avoid growing buffer.
    performance.clearMarks(formattedMarkName);
    performance.clearMeasures(formattedLabel);
  };
  
  var getFiberMarkName = function (label, debugID) {
    return label + ' (#' + debugID + ')';
  };
  
  var getFiberLabel = function (componentName, isMounted, phase) {
    if (phase === null) {
      // These are composite component total time measurements.
      return componentName + ' [' + (isMounted ? 'update' : 'mount') + ']';
    } else {
      // Composite component methods.
      return componentName + '.' + phase;
    }
  };
  
  var beginFiberMark = function (fiber, phase) {
    var componentName = getComponentName(fiber) || 'Unknown';
    var debugID = fiber._debugID;
    var isMounted = fiber.alternate !== null;
    var label = getFiberLabel(componentName, isMounted, phase);
  
    if (isCommitting && labelsInCurrentCommit.has(label)) {
      // During the commit phase, we don't show duplicate labels because
      // there is a fixed overhead for every measurement, and we don't
      // want to stretch the commit phase beyond necessary.
      return false;
    }
    labelsInCurrentCommit.add(label);
  
    var markName = getFiberMarkName(label, debugID);
    beginMark(markName);
    return true;
  };
  
  var clearFiberMark = function (fiber, phase) {
    var componentName = getComponentName(fiber) || 'Unknown';
    var debugID = fiber._debugID;
    var isMounted = fiber.alternate !== null;
    var label = getFiberLabel(componentName, isMounted, phase);
    var markName = getFiberMarkName(label, debugID);
    clearMark(markName);
  };
  
  var endFiberMark = function (fiber, phase, warning) {
    var componentName = getComponentName(fiber) || 'Unknown';
    var debugID = fiber._debugID;
    var isMounted = fiber.alternate !== null;
    var label = getFiberLabel(componentName, isMounted, phase);
    var markName = getFiberMarkName(label, debugID);
    endMark(label, markName, warning);
  };
  
  var shouldIgnoreFiber = function (fiber) {
    // Host components should be skipped in the timeline.
    // We could check typeof fiber.type, but does this work with RN?
    switch (fiber.tag) {
      case HostRoot:
      case HostComponent:
      case HostText:
      case HostPortal:
      case ReturnComponent:
      case Fragment:
        return true;
      default:
        return false;
    }
  };
  
  var clearPendingPhaseMeasurement = function () {
    if (currentPhase !== null && currentPhaseFiber !== null) {
      clearFiberMark(currentPhaseFiber, currentPhase);
    }
    currentPhaseFiber = null;
    currentPhase = null;
    hasScheduledUpdateInCurrentPhase = false;
  };
  
  var pauseTimers = function () {
    // Stops all currently active measurements so that they can be resumed
    // if we continue in a later deferred loop from the same unit of work.
    var fiber = currentFiber;
    while (fiber) {
      if (fiber._debugIsCurrentlyTiming) {
        endFiberMark(fiber, null, null);
      }
      fiber = fiber['return'];
    }
  };
  
  var resumeTimersRecursively = function (fiber) {
    if (fiber['return'] !== null) {
      resumeTimersRecursively(fiber['return']);
    }
    if (fiber._debugIsCurrentlyTiming) {
      beginFiberMark(fiber, null);
    }
  };
  
  var resumeTimers = function () {
    // Resumes all measurements that were active during the last deferred loop.
    if (currentFiber !== null) {
      resumeTimersRecursively(currentFiber);
    }
  };
  
  function recordEffect() {
    if (enableUserTimingAPI) {
      effectCountInCurrentCommit++;
    }
  }
  
  function recordScheduleUpdate() {
    if (enableUserTimingAPI) {
      if (isCommitting) {
        hasScheduledUpdateInCurrentCommit = true;
      }
      if (currentPhase !== null && currentPhase !== 'componentWillMount' && currentPhase !== 'componentWillReceiveProps') {
        hasScheduledUpdateInCurrentPhase = true;
      }
    }
  }
  
  function startRequestCallbackTimer() {
    if (enableUserTimingAPI) {
      if (supportsUserTiming && !isWaitingForCallback) {
        isWaitingForCallback = true;
        beginMark('(Waiting for async callback...)');
      }
    }
  }
  
  function stopRequestCallbackTimer(didExpire) {
    if (enableUserTimingAPI) {
      if (supportsUserTiming) {
        isWaitingForCallback = false;
        var warning = didExpire ? 'React was blocked by main thread' : null;
        endMark('(Waiting for async callback...)', '(Waiting for async callback...)', warning);
      }
    }
  }
  
  function startWorkTimer(fiber) {
    if (enableUserTimingAPI) {
      if (!supportsUserTiming || shouldIgnoreFiber(fiber)) {
        return;
      }
      // If we pause, this is the fiber to unwind from.
      currentFiber = fiber;
      if (!beginFiberMark(fiber, null)) {
        return;
      }
      fiber._debugIsCurrentlyTiming = true;
    }
  }
  
  function cancelWorkTimer(fiber) {
    if (enableUserTimingAPI) {
      if (!supportsUserTiming || shouldIgnoreFiber(fiber)) {
        return;
      }
      // Remember we shouldn't complete measurement for this fiber.
      // Otherwise flamechart will be deep even for small updates.
      fiber._debugIsCurrentlyTiming = false;
      clearFiberMark(fiber, null);
    }
  }
  
  function stopWorkTimer(fiber) {
    if (enableUserTimingAPI) {
      if (!supportsUserTiming || shouldIgnoreFiber(fiber)) {
        return;
      }
      // If we pause, its parent is the fiber to unwind from.
      currentFiber = fiber['return'];
      if (!fiber._debugIsCurrentlyTiming) {
        return;
      }
      fiber._debugIsCurrentlyTiming = false;
      endFiberMark(fiber, null, null);
    }
  }
  
  function stopFailedWorkTimer(fiber) {
    if (enableUserTimingAPI) {
      if (!supportsUserTiming || shouldIgnoreFiber(fiber)) {
        return;
      }
      // If we pause, its parent is the fiber to unwind from.
      currentFiber = fiber['return'];
      if (!fiber._debugIsCurrentlyTiming) {
        return;
      }
      fiber._debugIsCurrentlyTiming = false;
      var warning = 'An error was thrown inside this error boundary';
      endFiberMark(fiber, null, warning);
    }
  }
  
  function startPhaseTimer(fiber, phase) {
    if (enableUserTimingAPI) {
      if (!supportsUserTiming) {
        return;
      }
      clearPendingPhaseMeasurement();
      if (!beginFiberMark(fiber, phase)) {
        return;
      }
      currentPhaseFiber = fiber;
      currentPhase = phase;
    }
  }
  
  function stopPhaseTimer() {
    if (enableUserTimingAPI) {
      if (!supportsUserTiming) {
        return;
      }
      if (currentPhase !== null && currentPhaseFiber !== null) {
        var warning = hasScheduledUpdateInCurrentPhase ? 'Scheduled a cascading update' : null;
        endFiberMark(currentPhaseFiber, currentPhase, warning);
      }
      currentPhase = null;
      currentPhaseFiber = null;
    }
  }
  
  function startWorkLoopTimer(nextUnitOfWork) {
    if (enableUserTimingAPI) {
      currentFiber = nextUnitOfWork;
      if (!supportsUserTiming) {
        return;
      }
      commitCountInCurrentWorkLoop = 0;
      // This is top level call.
      // Any other measurements are performed within.
      beginMark('(React Tree Reconciliation)');
      // Resume any measurements that were in progress during the last loop.
      resumeTimers();
    }
  }
  
  function stopWorkLoopTimer(interruptedBy) {
    if (enableUserTimingAPI) {
      if (!supportsUserTiming) {
        return;
      }
      var warning = null;
      if (interruptedBy !== null) {
        if (interruptedBy.tag === HostRoot) {
          warning = 'A top-level update interrupted the previous render';
        } else {
          var componentName = getComponentName(interruptedBy) || 'Unknown';
          warning = 'An update to ' + componentName + ' interrupted the previous render';
        }
      } else if (commitCountInCurrentWorkLoop > 1) {
        warning = 'There were cascading updates';
      }
      commitCountInCurrentWorkLoop = 0;
      // Pause any measurements until the next loop.
      pauseTimers();
      endMark('(React Tree Reconciliation)', '(React Tree Reconciliation)', warning);
    }
  }
  
  function startCommitTimer() {
    if (enableUserTimingAPI) {
      if (!supportsUserTiming) {
        return;
      }
      isCommitting = true;
      hasScheduledUpdateInCurrentCommit = false;
      labelsInCurrentCommit.clear();
      beginMark('(Committing Changes)');
    }
  }
  
  function stopCommitTimer() {
    if (enableUserTimingAPI) {
      if (!supportsUserTiming) {
        return;
      }
  
      var warning = null;
      if (hasScheduledUpdateInCurrentCommit) {
        warning = 'Lifecycle hook scheduled a cascading update';
      } else if (commitCountInCurrentWorkLoop > 0) {
        warning = 'Caused by a cascading update in earlier commit';
      }
      hasScheduledUpdateInCurrentCommit = false;
      commitCountInCurrentWorkLoop++;
      isCommitting = false;
      labelsInCurrentCommit.clear();
  
      endMark('(Committing Changes)', '(Committing Changes)', warning);
    }
  }
  
  function startCommitHostEffectsTimer() {
    if (enableUserTimingAPI) {
      if (!supportsUserTiming) {
        return;
      }
      effectCountInCurrentCommit = 0;
      beginMark('(Committing Host Effects)');
    }
  }
  
  function stopCommitHostEffectsTimer() {
    if (enableUserTimingAPI) {
      if (!supportsUserTiming) {
        return;
      }
      var count = effectCountInCurrentCommit;
      effectCountInCurrentCommit = 0;
      endMark('(Committing Host Effects: ' + count + ' Total)', '(Committing Host Effects)', null);
    }
  }
  
  function startCommitLifeCyclesTimer() {
    if (enableUserTimingAPI) {
      if (!supportsUserTiming) {
        return;
      }
      effectCountInCurrentCommit = 0;
      beginMark('(Calling Lifecycle Methods)');
    }
  }
  
  function stopCommitLifeCyclesTimer() {
    if (enableUserTimingAPI) {
      if (!supportsUserTiming) {
        return;
      }
      var count = effectCountInCurrentCommit;
      effectCountInCurrentCommit = 0;
      endMark('(Calling Lifecycle Methods: ' + count + ' Total)', '(Calling Lifecycle Methods)', null);
    }
  }
  
  {
    var warnedAboutMissingGetChildContext = {};
  }
  
  // A cursor to the current merged context object on the stack.
  var contextStackCursor = createCursor(emptyObject_1);
  // A cursor to a boolean indicating whether the context has changed.
  var didPerformWorkStackCursor = createCursor(false);
  // Keep track of the previous context object that was on the stack.
  // We use this to get access to the parent context after we have already
  // pushed the next context provider, and now need to merge their contexts.
  var previousContext = emptyObject_1;
  
  function getUnmaskedContext(workInProgress) {
    var hasOwnContext = isContextProvider(workInProgress);
    if (hasOwnContext) {
      // If the fiber is a context provider itself, when we read its context
      // we have already pushed its own child context on the stack. A context
      // provider should not "see" its own child context. Therefore we read the
      // previous (parent) context instead for a context provider.
      return previousContext;
    }
    return contextStackCursor.current;
  }
  
  function cacheContext(workInProgress, unmaskedContext, maskedContext) {
    var instance = workInProgress.stateNode;
    instance.__reactInternalMemoizedUnmaskedChildContext = unmaskedContext;
    instance.__reactInternalMemoizedMaskedChildContext = maskedContext;
  }
  
  function getMaskedContext(workInProgress, unmaskedContext) {
    var type = workInProgress.type;
    var contextTypes = type.contextTypes;
    if (!contextTypes) {
      return emptyObject_1;
    }
  
    // Avoid recreating masked context unless unmasked context has changed.
    // Failing to do this will result in unnecessary calls to componentWillReceiveProps.
    // This may trigger infinite loops if componentWillReceiveProps calls setState.
    var instance = workInProgress.stateNode;
    if (instance && instance.__reactInternalMemoizedUnmaskedChildContext === unmaskedContext) {
      return instance.__reactInternalMemoizedMaskedChildContext;
    }
  
    var context = {};
    for (var key in contextTypes) {
      context[key] = unmaskedContext[key];
    }
  
    {
      var name = getComponentName(workInProgress) || 'Unknown';
      checkPropTypes_1$1(contextTypes, context, 'context', name, ReactDebugCurrentFiber.getCurrentFiberStackAddendum);
    }
  
    // Cache unmasked context so we can avoid recreating masked context unless necessary.
    // Context is created before the class component is instantiated so check for instance.
    if (instance) {
      cacheContext(workInProgress, unmaskedContext, context);
    }
  
    return context;
  }
  
  function hasContextChanged() {
    return didPerformWorkStackCursor.current;
  }
  
  function isContextConsumer(fiber) {
    return fiber.tag === ClassComponent && fiber.type.contextTypes != null;
  }
  
  function isContextProvider(fiber) {
    return fiber.tag === ClassComponent && fiber.type.childContextTypes != null;
  }
  
  function popContextProvider(fiber) {
    if (!isContextProvider(fiber)) {
      return;
    }
  
    pop(didPerformWorkStackCursor, fiber);
    pop(contextStackCursor, fiber);
  }
  
  function popTopLevelContextObject(fiber) {
    pop(didPerformWorkStackCursor, fiber);
    pop(contextStackCursor, fiber);
  }
  
  function pushTopLevelContextObject(fiber, context, didChange) {
    !(contextStackCursor.cursor == null) ? invariant_1$1(false, 'Unexpected context found on stack. This error is likely caused by a bug in React. Please file an issue.') : void 0;
  
    push(contextStackCursor, context, fiber);
    push(didPerformWorkStackCursor, didChange, fiber);
  }
  
  function processChildContext(fiber, parentContext) {
    var instance = fiber.stateNode;
    var childContextTypes = fiber.type.childContextTypes;
  
    // TODO (bvaughn) Replace this behavior with an invariant() in the future.
    // It has only been added in Fiber to match the (unintentional) behavior in Stack.
    if (typeof instance.getChildContext !== 'function') {
      {
        var componentName = getComponentName(fiber) || 'Unknown';
  
        if (!warnedAboutMissingGetChildContext[componentName]) {
          warnedAboutMissingGetChildContext[componentName] = true;
          warning_1$1(false, '%s.childContextTypes is specified but there is no getChildContext() method ' + 'on the instance. You can either define getChildContext() on %s or remove ' + 'childContextTypes from it.', componentName, componentName);
        }
      }
      return parentContext;
    }
  
    var childContext = void 0;
    {
      ReactDebugCurrentFiber.setCurrentPhase('getChildContext');
    }
    startPhaseTimer(fiber, 'getChildContext');
    childContext = instance.getChildContext();
    stopPhaseTimer();
    {
      ReactDebugCurrentFiber.setCurrentPhase(null);
    }
    for (var contextKey in childContext) {
      !(contextKey in childContextTypes) ? invariant_1$1(false, '%s.getChildContext(): key "%s" is not defined in childContextTypes.', getComponentName(fiber) || 'Unknown', contextKey) : void 0;
    }
    {
      var name = getComponentName(fiber) || 'Unknown';
      checkPropTypes_1$1(childContextTypes, childContext, 'child context', name,
      // In practice, there is one case in which we won't get a stack. It's when
      // somebody calls unstable_renderSubtreeIntoContainer() and we process
      // context from the parent component instance. The stack will be missing
      // because it's outside of the reconciliation, and so the pointer has not
      // been set. This is rare and doesn't matter. We'll also remove that API.
      ReactDebugCurrentFiber.getCurrentFiberStackAddendum);
    }
  
    return _assign({}, parentContext, childContext);
  }
  
  function pushContextProvider(workInProgress) {
    if (!isContextProvider(workInProgress)) {
      return false;
    }
  
    var instance = workInProgress.stateNode;
    // We push the context as early as possible to ensure stack integrity.
    // If the instance does not exist yet, we will push null at first,
    // and replace it on the stack later when invalidating the context.
    var memoizedMergedChildContext = instance && instance.__reactInternalMemoizedMergedChildContext || emptyObject_1;
  
    // Remember the parent context so we can merge with it later.
    // Inherit the parent's did-perform-work value to avoid inadvertently blocking updates.
    previousContext = contextStackCursor.current;
    push(contextStackCursor, memoizedMergedChildContext, workInProgress);
    push(didPerformWorkStackCursor, didPerformWorkStackCursor.current, workInProgress);
  
    return true;
  }
  
  function invalidateContextProvider(workInProgress, didChange) {
    var instance = workInProgress.stateNode;
    !instance ? invariant_1$1(false, 'Expected to have an instance by this point. This error is likely caused by a bug in React. Please file an issue.') : void 0;
  
    if (didChange) {
      // Merge parent and own context.
      // Skip this if we're not updating due to sCU.
      // This avoids unnecessarily recomputing memoized values.
      var mergedContext = processChildContext(workInProgress, previousContext);
      instance.__reactInternalMemoizedMergedChildContext = mergedContext;
  
      // Replace the old (or empty) context with the new one.
      // It is important to unwind the context in the reverse order.
      pop(didPerformWorkStackCursor, workInProgress);
      pop(contextStackCursor, workInProgress);
      // Now push the new context and mark that it has changed.
      push(contextStackCursor, mergedContext, workInProgress);
      push(didPerformWorkStackCursor, didChange, workInProgress);
    } else {
      pop(didPerformWorkStackCursor, workInProgress);
      push(didPerformWorkStackCursor, didChange, workInProgress);
    }
  }
  
  function resetContext() {
    previousContext = emptyObject_1;
    contextStackCursor.current = emptyObject_1;
    didPerformWorkStackCursor.current = false;
  }
  
  function findCurrentUnmaskedContext(fiber) {
    // Currently this is only used with renderSubtreeIntoContainer; not sure if it
    // makes sense elsewhere
    !(isFiberMounted(fiber) && fiber.tag === ClassComponent) ? invariant_1$1(false, 'Expected subtree parent to be a mounted class component. This error is likely caused by a bug in React. Please file an issue.') : void 0;
  
    var node = fiber;
    while (node.tag !== HostRoot) {
      if (isContextProvider(node)) {
        return node.stateNode.__reactInternalMemoizedMergedChildContext;
      }
      var parent = node['return'];
      !parent ? invariant_1$1(false, 'Found unexpected detached subtree parent. This error is likely caused by a bug in React. Please file an issue.') : void 0;
      node = parent;
    }
    return node.stateNode.context;
  }
  
  var NoWork = 0; // TODO: Use an opaque type once ESLint et al support the syntax
  
  var Sync = 1;
  var Never = 2147483647; // Max int32: Math.pow(2, 31) - 1
  
  var UNIT_SIZE = 10;
  var MAGIC_NUMBER_OFFSET = 2;
  
  // 1 unit of expiration time represents 10ms.
  function msToExpirationTime(ms) {
    // Always add an offset so that we don't clash with the magic number for NoWork.
    return (ms / UNIT_SIZE | 0) + MAGIC_NUMBER_OFFSET;
  }
  
  function ceiling(num, precision) {
    return ((num / precision | 0) + 1) * precision;
  }
  
  function computeExpirationBucket(currentTime, expirationInMs, bucketSizeMs) {
    return ceiling(currentTime + expirationInMs / UNIT_SIZE, bucketSizeMs / UNIT_SIZE);
  }
  
  var NoContext = 0;
  var AsyncUpdates = 1;
  
  {
    var hasBadMapPolyfill = false;
    try {
      var nonExtensibleObject = Object.preventExtensions({});
      /* eslint-disable no-new */
      new Map([[nonExtensibleObject, null]]);
      new Set([nonExtensibleObject]);
      /* eslint-enable no-new */
    } catch (e) {
      // TODO: Consider warning about bad polyfills
      hasBadMapPolyfill = true;
    }
  }
  
  // A Fiber is work on a Component that needs to be done or was done. There can
  // be more than one per component.
  
  
  {
    var debugCounter = 1;
  }
  
  function FiberNode(tag, key, internalContextTag) {
    // Instance
    this.tag = tag;
    this.key = key;
    this.type = null;
    this.stateNode = null;
  
    // Fiber
    this['return'] = null;
    this.child = null;
    this.sibling = null;
    this.index = 0;
  
    this.ref = null;
  
    this.pendingProps = null;
    this.memoizedProps = null;
    this.updateQueue = null;
    this.memoizedState = null;
  
    this.internalContextTag = internalContextTag;
  
    // Effects
    this.effectTag = NoEffect;
    this.nextEffect = null;
  
    this.firstEffect = null;
    this.lastEffect = null;
  
    this.expirationTime = NoWork;
  
    this.alternate = null;
  
    {
      this._debugID = debugCounter++;
      this._debugSource = null;
      this._debugOwner = null;
      this._debugIsCurrentlyTiming = false;
      if (!hasBadMapPolyfill && typeof Object.preventExtensions === 'function') {
        Object.preventExtensions(this);
      }
    }
  }
  
  // This is a constructor function, rather than a POJO constructor, still
  // please ensure we do the following:
  // 1) Nobody should add any instance methods on this. Instance methods can be
  //    more difficult to predict when they get optimized and they are almost
  //    never inlined properly in static compilers.
  // 2) Nobody should rely on `instanceof Fiber` for type testing. We should
  //    always know when it is a fiber.
  // 3) We might want to experiment with using numeric keys since they are easier
  //    to optimize in a non-JIT environment.
  // 4) We can easily go from a constructor to a createFiber object literal if that
  //    is faster.
  // 5) It should be easy to port this to a C struct and keep a C implementation
  //    compatible.
  var createFiber = function (tag, key, internalContextTag) {
    // $FlowFixMe: the shapes are exact here but Flow doesn't like constructors
    return new FiberNode(tag, key, internalContextTag);
  };
  
  function shouldConstruct(Component) {
    return !!(Component.prototype && Component.prototype.isReactComponent);
  }
  
  // This is used to create an alternate fiber to do work on.
  function createWorkInProgress(current, pendingProps, expirationTime) {
    var workInProgress = current.alternate;
    if (workInProgress === null) {
      // We use a double buffering pooling technique because we know that we'll
      // only ever need at most two versions of a tree. We pool the "other" unused
      // node that we're free to reuse. This is lazily created to avoid allocating
      // extra objects for things that are never updated. It also allow us to
      // reclaim the extra memory if needed.
      workInProgress = createFiber(current.tag, current.key, current.internalContextTag);
      workInProgress.type = current.type;
      workInProgress.stateNode = current.stateNode;
  
      {
        // DEV-only fields
        workInProgress._debugID = current._debugID;
        workInProgress._debugSource = current._debugSource;
        workInProgress._debugOwner = current._debugOwner;
      }
  
      workInProgress.alternate = current;
      current.alternate = workInProgress;
    } else {
      // We already have an alternate.
      // Reset the effect tag.
      workInProgress.effectTag = NoEffect;
  
      // The effect list is no longer valid.
      workInProgress.nextEffect = null;
      workInProgress.firstEffect = null;
      workInProgress.lastEffect = null;
    }
  
    workInProgress.expirationTime = expirationTime;
    workInProgress.pendingProps = pendingProps;
  
    workInProgress.child = current.child;
    workInProgress.memoizedProps = current.memoizedProps;
    workInProgress.memoizedState = current.memoizedState;
    workInProgress.updateQueue = current.updateQueue;
  
    // These will be overridden during the parent's reconciliation
    workInProgress.sibling = current.sibling;
    workInProgress.index = current.index;
    workInProgress.ref = current.ref;
  
    return workInProgress;
  }
  
  function createHostRootFiber() {
    var fiber = createFiber(HostRoot, null, NoContext);
    return fiber;
  }
  
  function createFiberFromElement(element, internalContextTag, expirationTime) {
    var owner = null;
    {
      owner = element._owner;
    }
  
    var fiber = void 0;
    var type = element.type,
        key = element.key;
  
    if (typeof type === 'function') {
      fiber = shouldConstruct(type) ? createFiber(ClassComponent, key, internalContextTag) : createFiber(IndeterminateComponent, key, internalContextTag);
      fiber.type = type;
      fiber.pendingProps = element.props;
    } else if (typeof type === 'string') {
      fiber = createFiber(HostComponent, key, internalContextTag);
      fiber.type = type;
      fiber.pendingProps = element.props;
    } else if (typeof type === 'object' && type !== null && typeof type.tag === 'number') {
      // Currently assumed to be a continuation and therefore is a fiber already.
      // TODO: The yield system is currently broken for updates in some cases.
      // The reified yield stores a fiber, but we don't know which fiber that is;
      // the current or a workInProgress? When the continuation gets rendered here
      // we don't know if we can reuse that fiber or if we need to clone it.
      // There is probably a clever way to restructure this.
      fiber = type;
      fiber.pendingProps = element.props;
    } else {
      var info = '';
      {
        if (type === undefined || typeof type === 'object' && type !== null && Object.keys(type).length === 0) {
          info += ' You likely forgot to export your component from the file ' + "it's defined in, or you might have mixed up default and named imports.";
        }
        var ownerName = owner ? getComponentName(owner) : null;
        if (ownerName) {
          info += '\n\nCheck the render method of `' + ownerName + '`.';
        }
      }
      invariant_1$1(false, 'Element type is invalid: expected a string (for built-in components) or a class/function (for composite components) but got: %s.%s', type == null ? type : typeof type, info);
    }
  
    {
      fiber._debugSource = element._source;
      fiber._debugOwner = element._owner;
    }
  
    fiber.expirationTime = expirationTime;
  
    return fiber;
  }
  
  function createFiberFromFragment(elements, internalContextTag, expirationTime, key) {
    var fiber = createFiber(Fragment, key, internalContextTag);
    fiber.pendingProps = elements;
    fiber.expirationTime = expirationTime;
    return fiber;
  }
  
  function createFiberFromText(content, internalContextTag, expirationTime) {
    var fiber = createFiber(HostText, null, internalContextTag);
    fiber.pendingProps = content;
    fiber.expirationTime = expirationTime;
    return fiber;
  }
  
  function createFiberFromHostInstanceForDeletion() {
    var fiber = createFiber(HostComponent, null, NoContext);
    fiber.type = 'DELETED';
    return fiber;
  }
  
  function createFiberFromCall(call, internalContextTag, expirationTime) {
    var fiber = createFiber(CallComponent, call.key, internalContextTag);
    fiber.type = call.handler;
    fiber.pendingProps = call;
    fiber.expirationTime = expirationTime;
    return fiber;
  }
  
  function createFiberFromReturn(returnNode, internalContextTag, expirationTime) {
    var fiber = createFiber(ReturnComponent, null, internalContextTag);
    fiber.expirationTime = expirationTime;
    return fiber;
  }
  
  function createFiberFromPortal(portal, internalContextTag, expirationTime) {
    var fiber = createFiber(HostPortal, portal.key, internalContextTag);
    fiber.pendingProps = portal.children || [];
    fiber.expirationTime = expirationTime;
    fiber.stateNode = {
      containerInfo: portal.containerInfo,
      pendingChildren: null, // Used by persistent updates
      implementation: portal.implementation
    };
    return fiber;
  }
  
  function createFiberRoot(containerInfo, hydrate) {
    // Cyclic construction. This cheats the type system right now because
    // stateNode is any.
    var uninitializedFiber = createHostRootFiber();
    var root = {
      current: uninitializedFiber,
      containerInfo: containerInfo,
      pendingChildren: null,
      remainingExpirationTime: NoWork,
      isReadyForCommit: false,
      finishedWork: null,
      context: null,
      pendingContext: null,
      hydrate: hydrate,
      nextScheduledRoot: null
    };
    uninitializedFiber.stateNode = root;
    return root;
  }
  
  var onCommitFiberRoot = null;
  var onCommitFiberUnmount = null;
  var hasLoggedError = false;
  
  function catchErrors(fn) {
    return function (arg) {
      try {
        return fn(arg);
      } catch (err) {
        if (true && !hasLoggedError) {
          hasLoggedError = true;
          warning_1$1(false, 'React DevTools encountered an error: %s', err);
        }
      }
    };
  }
  
  function injectInternals(internals) {
    if (typeof __REACT_DEVTOOLS_GLOBAL_HOOK__ === 'undefined') {
      // No DevTools
      return false;
    }
    var hook = __REACT_DEVTOOLS_GLOBAL_HOOK__;
    if (hook.isDisabled) {
      // This isn't a real property on the hook, but it can be set to opt out
      // of DevTools integration and associated warnings and logs.
      // https://github.com/facebook/react/issues/3877
      return true;
    }
    if (!hook.supportsFiber) {
      {
        warning_1$1(false, 'The installed version of React DevTools is too old and will not work ' + 'with the current version of React. Please update React DevTools. ' + 'https://fb.me/react-devtools');
      }
      // DevTools exists, even though it doesn't support Fiber.
      return true;
    }
    try {
      var rendererID = hook.inject(internals);
      // We have successfully injected, so now it is safe to set up hooks.
      onCommitFiberRoot = catchErrors(function (root) {
        return hook.onCommitFiberRoot(rendererID, root);
      });
      onCommitFiberUnmount = catchErrors(function (fiber) {
        return hook.onCommitFiberUnmount(rendererID, fiber);
      });
    } catch (err) {
      // Catch all errors because it is unsafe to throw during initialization.
      {
        warning_1$1(false, 'React DevTools encountered an error: %s.', err);
      }
    }
    // DevTools exists
    return true;
  }
  
  function onCommitRoot(root) {
    if (typeof onCommitFiberRoot === 'function') {
      onCommitFiberRoot(root);
    }
  }
  
  function onCommitUnmount(fiber) {
    if (typeof onCommitFiberUnmount === 'function') {
      onCommitFiberUnmount(fiber);
    }
  }
  
  {
    var didWarnUpdateInsideUpdate = false;
  }
  
  // Callbacks are not validated until invocation
  
  
  // Singly linked-list of updates. When an update is scheduled, it is added to
  // the queue of the current fiber and the work-in-progress fiber. The two queues
  // are separate but they share a persistent structure.
  //
  // During reconciliation, updates are removed from the work-in-progress fiber,
  // but they remain on the current fiber. That ensures that if a work-in-progress
  // is aborted, the aborted updates are recovered by cloning from current.
  //
  // The work-in-progress queue is always a subset of the current queue.
  //
  // When the tree is committed, the work-in-progress becomes the current.
  
  
  function createUpdateQueue(baseState) {
    var queue = {
      baseState: baseState,
      expirationTime: NoWork,
      first: null,
      last: null,
      callbackList: null,
      hasForceUpdate: false,
      isInitialized: false
    };
    {
      queue.isProcessing = false;
    }
    return queue;
  }
  
  function insertUpdateIntoQueue(queue, update) {
    // Append the update to the end of the list.
    if (queue.last === null) {
      // Queue is empty
      queue.first = queue.last = update;
    } else {
      queue.last.next = update;
      queue.last = update;
    }
    if (queue.expirationTime === NoWork || queue.expirationTime > update.expirationTime) {
      queue.expirationTime = update.expirationTime;
    }
  }
  
  function insertUpdateIntoFiber(fiber, update) {
    // We'll have at least one and at most two distinct update queues.
    var alternateFiber = fiber.alternate;
    var queue1 = fiber.updateQueue;
    if (queue1 === null) {
      // TODO: We don't know what the base state will be until we begin work.
      // It depends on which fiber is the next current. Initialize with an empty
      // base state, then set to the memoizedState when rendering. Not super
      // happy with this approach.
      queue1 = fiber.updateQueue = createUpdateQueue(null);
    }
  
    var queue2 = void 0;
    if (alternateFiber !== null) {
      queue2 = alternateFiber.updateQueue;
      if (queue2 === null) {
        queue2 = alternateFiber.updateQueue = createUpdateQueue(null);
      }
    } else {
      queue2 = null;
    }
    queue2 = queue2 !== queue1 ? queue2 : null;
  
    // Warn if an update is scheduled from inside an updater function.
    {
      if ((queue1.isProcessing || queue2 !== null && queue2.isProcessing) && !didWarnUpdateInsideUpdate) {
        warning_1$1(false, 'An update (setState, replaceState, or forceUpdate) was scheduled ' + 'from inside an update function. Update functions should be pure, ' + 'with zero side-effects. Consider using componentDidUpdate or a ' + 'callback.');
        didWarnUpdateInsideUpdate = true;
      }
    }
  
    // If there's only one queue, add the update to that queue and exit.
    if (queue2 === null) {
      insertUpdateIntoQueue(queue1, update);
      return;
    }
  
    // If either queue is empty, we need to add to both queues.
    if (queue1.last === null || queue2.last === null) {
      insertUpdateIntoQueue(queue1, update);
      insertUpdateIntoQueue(queue2, update);
      return;
    }
  
    // If both lists are not empty, the last update is the same for both lists
    // because of structural sharing. So, we should only append to one of
    // the lists.
    insertUpdateIntoQueue(queue1, update);
    // But we still need to update the `last` pointer of queue2.
    queue2.last = update;
  }
  
  function getUpdateExpirationTime(fiber) {
    if (fiber.tag !== ClassComponent && fiber.tag !== HostRoot) {
      return NoWork;
    }
    var updateQueue = fiber.updateQueue;
    if (updateQueue === null) {
      return NoWork;
    }
    return updateQueue.expirationTime;
  }
  
  function getStateFromUpdate(update, instance, prevState, props) {
    var partialState = update.partialState;
    if (typeof partialState === 'function') {
      var updateFn = partialState;
      return updateFn.call(instance, prevState, props);
    } else {
      return partialState;
    }
  }
  
  function processUpdateQueue(current, workInProgress, queue, instance, props, renderExpirationTime) {
    if (current !== null && current.updateQueue === queue) {
      // We need to create a work-in-progress queue, by cloning the current queue.
      var currentQueue = queue;
      queue = workInProgress.updateQueue = {
        baseState: currentQueue.baseState,
        expirationTime: currentQueue.expirationTime,
        first: currentQueue.first,
        last: currentQueue.last,
        isInitialized: currentQueue.isInitialized,
        // These fields are no longer valid because they were already committed.
        // Reset them.
        callbackList: null,
        hasForceUpdate: false
      };
    }
  
    {
      // Set this flag so we can warn if setState is called inside the update
      // function of another setState.
      queue.isProcessing = true;
    }
  
    // Reset the remaining expiration time. If we skip over any updates, we'll
    // increase this accordingly.
    queue.expirationTime = NoWork;
  
    // TODO: We don't know what the base state will be until we begin work.
    // It depends on which fiber is the next current. Initialize with an empty
    // base state, then set to the memoizedState when rendering. Not super
    // happy with this approach.
    var state = void 0;
    if (queue.isInitialized) {
      state = queue.baseState;
    } else {
      state = queue.baseState = workInProgress.memoizedState;
      queue.isInitialized = true;
    }
    var dontMutatePrevState = true;
    var update = queue.first;
    var didSkip = false;
    while (update !== null) {
      var updateExpirationTime = update.expirationTime;
      if (updateExpirationTime > renderExpirationTime) {
        // This update does not have sufficient priority. Skip it.
        var remainingExpirationTime = queue.expirationTime;
        if (remainingExpirationTime === NoWork || remainingExpirationTime > updateExpirationTime) {
          // Update the remaining expiration time.
          queue.expirationTime = updateExpirationTime;
        }
        if (!didSkip) {
          didSkip = true;
          queue.baseState = state;
        }
        // Continue to the next update.
        update = update.next;
        continue;
      }
  
      // This update does have sufficient priority.
  
      // If no previous updates were skipped, drop this update from the queue by
      // advancing the head of the list.
      if (!didSkip) {
        queue.first = update.next;
        if (queue.first === null) {
          queue.last = null;
        }
      }
  
      // Process the update
      var _partialState = void 0;
      if (update.isReplace) {
        state = getStateFromUpdate(update, instance, state, props);
        dontMutatePrevState = true;
      } else {
        _partialState = getStateFromUpdate(update, instance, state, props);
        if (_partialState) {
          if (dontMutatePrevState) {
            // $FlowFixMe: Idk how to type this properly.
            state = _assign({}, state, _partialState);
          } else {
            state = _assign(state, _partialState);
          }
          dontMutatePrevState = false;
        }
      }
      if (update.isForced) {
        queue.hasForceUpdate = true;
      }
      if (update.callback !== null) {
        // Append to list of callbacks.
        var _callbackList = queue.callbackList;
        if (_callbackList === null) {
          _callbackList = queue.callbackList = [];
        }
        _callbackList.push(update);
      }
      update = update.next;
    }
  
    if (queue.callbackList !== null) {
      workInProgress.effectTag |= Callback;
    } else if (queue.first === null && !queue.hasForceUpdate) {
      // The queue is empty. We can reset it.
      workInProgress.updateQueue = null;
    }
  
    if (!didSkip) {
      didSkip = true;
      queue.baseState = state;
    }
  
    {
      // No longer processing.
      queue.isProcessing = false;
    }
  
    return state;
  }
  
  function commitCallbacks(queue, context) {
    var callbackList = queue.callbackList;
    if (callbackList === null) {
      return;
    }
    // Set the list to null to make sure they don't get called more than once.
    queue.callbackList = null;
    for (var i = 0; i < callbackList.length; i++) {
      var update = callbackList[i];
      var _callback = update.callback;
      // This update might be processed again. Clear the callback so it's only
      // called once.
      update.callback = null;
      !(typeof _callback === 'function') ? invariant_1$1(false, 'Invalid argument passed as callback. Expected a function. Instead received: %s', _callback) : void 0;
      _callback.call(context);
    }
  }
  
  var fakeInternalInstance = {};
  var isArray = Array.isArray;
  
  {
    var didWarnAboutStateAssignmentForComponent = {};
  
    var warnOnInvalidCallback = function (callback, callerName) {
      warning_1$1(callback === null || typeof callback === 'function', '%s(...): Expected the last optional `callback` argument to be a ' + 'function. Instead received: %s.', callerName, callback);
    };
  
    // This is so gross but it's at least non-critical and can be removed if
    // it causes problems. This is meant to give a nicer error message for
    // ReactDOM15.unstable_renderSubtreeIntoContainer(reactDOM16Component,
    // ...)) which otherwise throws a "_processChildContext is not a function"
    // exception.
    Object.defineProperty(fakeInternalInstance, '_processChildContext', {
      enumerable: false,
      value: function () {
        invariant_1$1(false, '_processChildContext is not available in React 16+. This likely means you have multiple copies of React and are attempting to nest a React 15 tree inside a React 16 tree using unstable_renderSubtreeIntoContainer, which isn\'t supported. Try to make sure you have only one copy of React (and ideally, switch to ReactDOM.createPortal).');
      }
    });
    Object.freeze(fakeInternalInstance);
  }
  
  var ReactFiberClassComponent = function (scheduleWork, computeExpirationForFiber, memoizeProps, memoizeState) {
    // Class component state updater
    var updater = {
      isMounted: isMounted,
      enqueueSetState: function (instance, partialState, callback) {
        var fiber = get(instance);
        callback = callback === undefined ? null : callback;
        {
          warnOnInvalidCallback(callback, 'setState');
        }
        var expirationTime = computeExpirationForFiber(fiber);
        var update = {
          expirationTime: expirationTime,
          partialState: partialState,
          callback: callback,
          isReplace: false,
          isForced: false,
          nextCallback: null,
          next: null
        };
        insertUpdateIntoFiber(fiber, update);
        scheduleWork(fiber, expirationTime);
      },
      enqueueReplaceState: function (instance, state, callback) {
        var fiber = get(instance);
        callback = callback === undefined ? null : callback;
        {
          warnOnInvalidCallback(callback, 'replaceState');
        }
        var expirationTime = computeExpirationForFiber(fiber);
        var update = {
          expirationTime: expirationTime,
          partialState: state,
          callback: callback,
          isReplace: true,
          isForced: false,
          nextCallback: null,
          next: null
        };
        insertUpdateIntoFiber(fiber, update);
        scheduleWork(fiber, expirationTime);
      },
      enqueueForceUpdate: function (instance, callback) {
        var fiber = get(instance);
        callback = callback === undefined ? null : callback;
        {
          warnOnInvalidCallback(callback, 'forceUpdate');
        }
        var expirationTime = computeExpirationForFiber(fiber);
        var update = {
          expirationTime: expirationTime,
          partialState: null,
          callback: callback,
          isReplace: false,
          isForced: true,
          nextCallback: null,
          next: null
        };
        insertUpdateIntoFiber(fiber, update);
        scheduleWork(fiber, expirationTime);
      }
    };
  
    function checkShouldComponentUpdate(workInProgress, oldProps, newProps, oldState, newState, newContext) {
      if (oldProps === null || workInProgress.updateQueue !== null && workInProgress.updateQueue.hasForceUpdate) {
        // If the workInProgress already has an Update effect, return true
        return true;
      }
  
      var instance = workInProgress.stateNode;
      var type = workInProgress.type;
      if (typeof instance.shouldComponentUpdate === 'function') {
        startPhaseTimer(workInProgress, 'shouldComponentUpdate');
        var shouldUpdate = instance.shouldComponentUpdate(newProps, newState, newContext);
        stopPhaseTimer();
  
        {
          warning_1$1(shouldUpdate !== undefined, '%s.shouldComponentUpdate(): Returned undefined instead of a ' + 'boolean value. Make sure to return true or false.', getComponentName(workInProgress) || 'Unknown');
        }
  
        return shouldUpdate;
      }
  
      if (type.prototype && type.prototype.isPureReactComponent) {
        return !shallowEqual_1$1(oldProps, newProps) || !shallowEqual_1$1(oldState, newState);
      }
  
      return true;
    }
  
    function checkClassInstance(workInProgress) {
      var instance = workInProgress.stateNode;
      var type = workInProgress.type;
      {
        var name = getComponentName(workInProgress);
        var renderPresent = instance.render;
  
        if (!renderPresent) {
          if (type.prototype && typeof type.prototype.render === 'function') {
            warning_1$1(false, '%s(...): No `render` method found on the returned component ' + 'instance: did you accidentally return an object from the constructor?', name);
          } else {
            warning_1$1(false, '%s(...): No `render` method found on the returned component ' + 'instance: you may have forgotten to define `render`.', name);
          }
        }
  
        var noGetInitialStateOnES6 = !instance.getInitialState || instance.getInitialState.isReactClassApproved || instance.state;
        warning_1$1(noGetInitialStateOnES6, 'getInitialState was defined on %s, a plain JavaScript class. ' + 'This is only supported for classes created using React.createClass. ' + 'Did you mean to define a state property instead?', name);
        var noGetDefaultPropsOnES6 = !instance.getDefaultProps || instance.getDefaultProps.isReactClassApproved;
        warning_1$1(noGetDefaultPropsOnES6, 'getDefaultProps was defined on %s, a plain JavaScript class. ' + 'This is only supported for classes created using React.createClass. ' + 'Use a static property to define defaultProps instead.', name);
        var noInstancePropTypes = !instance.propTypes;
        warning_1$1(noInstancePropTypes, 'propTypes was defined as an instance property on %s. Use a static ' + 'property to define propTypes instead.', name);
        var noInstanceContextTypes = !instance.contextTypes;
        warning_1$1(noInstanceContextTypes, 'contextTypes was defined as an instance property on %s. Use a static ' + 'property to define contextTypes instead.', name);
        var noComponentShouldUpdate = typeof instance.componentShouldUpdate !== 'function';
        warning_1$1(noComponentShouldUpdate, '%s has a method called ' + 'componentShouldUpdate(). Did you mean shouldComponentUpdate()? ' + 'The name is phrased as a question because the function is ' + 'expected to return a value.', name);
        if (type.prototype && type.prototype.isPureReactComponent && typeof instance.shouldComponentUpdate !== 'undefined') {
          warning_1$1(false, '%s has a method called shouldComponentUpdate(). ' + 'shouldComponentUpdate should not be used when extending React.PureComponent. ' + 'Please extend React.Component if shouldComponentUpdate is used.', getComponentName(workInProgress) || 'A pure component');
        }
        var noComponentDidUnmount = typeof instance.componentDidUnmount !== 'function';
        warning_1$1(noComponentDidUnmount, '%s has a method called ' + 'componentDidUnmount(). But there is no such lifecycle method. ' + 'Did you mean componentWillUnmount()?', name);
        var noComponentDidReceiveProps = typeof instance.componentDidReceiveProps !== 'function';
        warning_1$1(noComponentDidReceiveProps, '%s has a method called ' + 'componentDidReceiveProps(). But there is no such lifecycle method. ' + 'If you meant to update the state in response to changing props, ' + 'use componentWillReceiveProps(). If you meant to fetch data or ' + 'run side-effects or mutations after React has updated the UI, use componentDidUpdate().', name);
        var noComponentWillRecieveProps = typeof instance.componentWillRecieveProps !== 'function';
        warning_1$1(noComponentWillRecieveProps, '%s has a method called ' + 'componentWillRecieveProps(). Did you mean componentWillReceiveProps()?', name);
        var hasMutatedProps = instance.props !== workInProgress.pendingProps;
        warning_1$1(instance.props === undefined || !hasMutatedProps, '%s(...): When calling super() in `%s`, make sure to pass ' + "up the same props that your component's constructor was passed.", name, name);
        var noInstanceDefaultProps = !instance.defaultProps;
        warning_1$1(noInstanceDefaultProps, 'Setting defaultProps as an instance property on %s is not supported and will be ignored.' + ' Instead, define defaultProps as a static property on %s.', name, name);
      }
  
      var state = instance.state;
      if (state && (typeof state !== 'object' || isArray(state))) {
        invariant_1$1(false, '%s.state: must be set to an object or null', getComponentName(workInProgress));
      }
      if (typeof instance.getChildContext === 'function') {
        !(typeof workInProgress.type.childContextTypes === 'object') ? invariant_1$1(false, '%s.getChildContext(): childContextTypes must be defined in order to use getChildContext().', getComponentName(workInProgress)) : void 0;
      }
    }
  
    function resetInputPointers(workInProgress, instance) {
      instance.props = workInProgress.memoizedProps;
      instance.state = workInProgress.memoizedState;
    }
  
    function adoptClassInstance(workInProgress, instance) {
      instance.updater = updater;
      workInProgress.stateNode = instance;
      // The instance needs access to the fiber so that it can schedule updates
      set(instance, workInProgress);
      {
        instance._reactInternalInstance = fakeInternalInstance;
      }
    }
  
    function constructClassInstance(workInProgress, props) {
      var ctor = workInProgress.type;
      var unmaskedContext = getUnmaskedContext(workInProgress);
      var needsContext = isContextConsumer(workInProgress);
      var context = needsContext ? getMaskedContext(workInProgress, unmaskedContext) : emptyObject_1;
      var instance = new ctor(props, context);
      adoptClassInstance(workInProgress, instance);
  
      // Cache unmasked context so we can avoid recreating masked context unless necessary.
      // ReactFiberContext usually updates this cache but can't for newly-created instances.
      if (needsContext) {
        cacheContext(workInProgress, unmaskedContext, context);
      }
  
      return instance;
    }
  
    function callComponentWillMount(workInProgress, instance) {
      startPhaseTimer(workInProgress, 'componentWillMount');
      var oldState = instance.state;
      instance.componentWillMount();
  
      stopPhaseTimer();
  
      if (oldState !== instance.state) {
        {
          warning_1$1(false, '%s.componentWillMount(): Assigning directly to this.state is ' + "deprecated (except inside a component's " + 'constructor). Use setState instead.', getComponentName(workInProgress));
        }
        updater.enqueueReplaceState(instance, instance.state, null);
      }
    }
  
    function callComponentWillReceiveProps(workInProgress, instance, newProps, newContext) {
      startPhaseTimer(workInProgress, 'componentWillReceiveProps');
      var oldState = instance.state;
      instance.componentWillReceiveProps(newProps, newContext);
      stopPhaseTimer();
  
      if (instance.state !== oldState) {
        {
          var componentName = getComponentName(workInProgress) || 'Component';
          if (!didWarnAboutStateAssignmentForComponent[componentName]) {
            warning_1$1(false, '%s.componentWillReceiveProps(): Assigning directly to ' + "this.state is deprecated (except inside a component's " + 'constructor). Use setState instead.', componentName);
            didWarnAboutStateAssignmentForComponent[componentName] = true;
          }
        }
        updater.enqueueReplaceState(instance, instance.state, null);
      }
    }
  
    // Invokes the mount life-cycles on a previously never rendered instance.
    function mountClassInstance(workInProgress, renderExpirationTime) {
      var current = workInProgress.alternate;
  
      {
        checkClassInstance(workInProgress);
      }
  
      var instance = workInProgress.stateNode;
      var state = instance.state || null;
  
      var props = workInProgress.pendingProps;
      !props ? invariant_1$1(false, 'There must be pending props for an initial mount. This error is likely caused by a bug in React. Please file an issue.') : void 0;
  
      var unmaskedContext = getUnmaskedContext(workInProgress);
  
      instance.props = props;
      instance.state = workInProgress.memoizedState = state;
      instance.refs = emptyObject_1;
      instance.context = getMaskedContext(workInProgress, unmaskedContext);
  
      if (enableAsyncSubtreeAPI && workInProgress.type != null && workInProgress.type.prototype != null && workInProgress.type.prototype.unstable_isAsyncReactComponent === true) {
        workInProgress.internalContextTag |= AsyncUpdates;
      }
  
      if (typeof instance.componentWillMount === 'function') {
        callComponentWillMount(workInProgress, instance);
        // If we had additional state updates during this life-cycle, let's
        // process them now.
        var updateQueue = workInProgress.updateQueue;
        if (updateQueue !== null) {
          instance.state = processUpdateQueue(current, workInProgress, updateQueue, instance, props, renderExpirationTime);
        }
      }
      if (typeof instance.componentDidMount === 'function') {
        workInProgress.effectTag |= Update;
      }
    }
  
    // Called on a preexisting class instance. Returns false if a resumed render
    // could be reused.
    // function resumeMountClassInstance(
    //   workInProgress: Fiber,
    //   priorityLevel: PriorityLevel,
    // ): boolean {
    //   const instance = workInProgress.stateNode;
    //   resetInputPointers(workInProgress, instance);
  
    //   let newState = workInProgress.memoizedState;
    //   let newProps = workInProgress.pendingProps;
    //   if (!newProps) {
    //     // If there isn't any new props, then we'll reuse the memoized props.
    //     // This could be from already completed work.
    //     newProps = workInProgress.memoizedProps;
    //     invariant(
    //       newProps != null,
    //       'There should always be pending or memoized props. This error is ' +
    //         'likely caused by a bug in React. Please file an issue.',
    //     );
    //   }
    //   const newUnmaskedContext = getUnmaskedContext(workInProgress);
    //   const newContext = getMaskedContext(workInProgress, newUnmaskedContext);
  
    //   const oldContext = instance.context;
    //   const oldProps = workInProgress.memoizedProps;
  
    //   if (
    //     typeof instance.componentWillReceiveProps === 'function' &&
    //     (oldProps !== newProps || oldContext !== newContext)
    //   ) {
    //     callComponentWillReceiveProps(
    //       workInProgress,
    //       instance,
    //       newProps,
    //       newContext,
    //     );
    //   }
  
    //   // Process the update queue before calling shouldComponentUpdate
    //   const updateQueue = workInProgress.updateQueue;
    //   if (updateQueue !== null) {
    //     newState = processUpdateQueue(
    //       workInProgress,
    //       updateQueue,
    //       instance,
    //       newState,
    //       newProps,
    //       priorityLevel,
    //     );
    //   }
  
    //   // TODO: Should we deal with a setState that happened after the last
    //   // componentWillMount and before this componentWillMount? Probably
    //   // unsupported anyway.
  
    //   if (
    //     !checkShouldComponentUpdate(
    //       workInProgress,
    //       workInProgress.memoizedProps,
    //       newProps,
    //       workInProgress.memoizedState,
    //       newState,
    //       newContext,
    //     )
    //   ) {
    //     // Update the existing instance's state, props, and context pointers even
    //     // though we're bailing out.
    //     instance.props = newProps;
    //     instance.state = newState;
    //     instance.context = newContext;
    //     return false;
    //   }
  
    //   // Update the input pointers now so that they are correct when we call
    //   // componentWillMount
    //   instance.props = newProps;
    //   instance.state = newState;
    //   instance.context = newContext;
  
    //   if (typeof instance.componentWillMount === 'function') {
    //     callComponentWillMount(workInProgress, instance);
    //     // componentWillMount may have called setState. Process the update queue.
    //     const newUpdateQueue = workInProgress.updateQueue;
    //     if (newUpdateQueue !== null) {
    //       newState = processUpdateQueue(
    //         workInProgress,
    //         newUpdateQueue,
    //         instance,
    //         newState,
    //         newProps,
    //         priorityLevel,
    //       );
    //     }
    //   }
  
    //   if (typeof instance.componentDidMount === 'function') {
    //     workInProgress.effectTag |= Update;
    //   }
  
    //   instance.state = newState;
  
    //   return true;
    // }
  
    // Invokes the update life-cycles and returns false if it shouldn't rerender.
    function updateClassInstance(current, workInProgress, renderExpirationTime) {
      var instance = workInProgress.stateNode;
      resetInputPointers(workInProgress, instance);
  
      var oldProps = workInProgress.memoizedProps;
      var newProps = workInProgress.pendingProps;
      if (!newProps) {
        // If there aren't any new props, then we'll reuse the memoized props.
        // This could be from already completed work.
        newProps = oldProps;
        !(newProps != null) ? invariant_1$1(false, 'There should always be pending or memoized props. This error is likely caused by a bug in React. Please file an issue.') : void 0;
      }
      var oldContext = instance.context;
      var newUnmaskedContext = getUnmaskedContext(workInProgress);
      var newContext = getMaskedContext(workInProgress, newUnmaskedContext);
  
      // Note: During these life-cycles, instance.props/instance.state are what
      // ever the previously attempted to render - not the "current". However,
      // during componentDidUpdate we pass the "current" props.
  
      if (typeof instance.componentWillReceiveProps === 'function' && (oldProps !== newProps || oldContext !== newContext)) {
        callComponentWillReceiveProps(workInProgress, instance, newProps, newContext);
      }
  
      // Compute the next state using the memoized state and the update queue.
      var oldState = workInProgress.memoizedState;
      // TODO: Previous state can be null.
      var newState = void 0;
      if (workInProgress.updateQueue !== null) {
        newState = processUpdateQueue(current, workInProgress, workInProgress.updateQueue, instance, newProps, renderExpirationTime);
      } else {
        newState = oldState;
      }
  
      if (oldProps === newProps && oldState === newState && !hasContextChanged() && !(workInProgress.updateQueue !== null && workInProgress.updateQueue.hasForceUpdate)) {
        // If an update was already in progress, we should schedule an Update
        // effect even though we're bailing out, so that cWU/cDU are called.
        if (typeof instance.componentDidUpdate === 'function') {
          if (oldProps !== current.memoizedProps || oldState !== current.memoizedState) {
            workInProgress.effectTag |= Update;
          }
        }
        return false;
      }
  
      var shouldUpdate = checkShouldComponentUpdate(workInProgress, oldProps, newProps, oldState, newState, newContext);
  
      if (shouldUpdate) {
        if (typeof instance.componentWillUpdate === 'function') {
          startPhaseTimer(workInProgress, 'componentWillUpdate');
          instance.componentWillUpdate(newProps, newState, newContext);
          stopPhaseTimer();
        }
        if (typeof instance.componentDidUpdate === 'function') {
          workInProgress.effectTag |= Update;
        }
      } else {
        // If an update was already in progress, we should schedule an Update
        // effect even though we're bailing out, so that cWU/cDU are called.
        if (typeof instance.componentDidUpdate === 'function') {
          if (oldProps !== current.memoizedProps || oldState !== current.memoizedState) {
            workInProgress.effectTag |= Update;
          }
        }
  
        // If shouldComponentUpdate returned false, we should still update the
        // memoized props/state to indicate that this work can be reused.
        memoizeProps(workInProgress, newProps);
        memoizeState(workInProgress, newState);
      }
  
      // Update the existing instance's state, props, and context pointers even
      // if shouldComponentUpdate returns false.
      instance.props = newProps;
      instance.state = newState;
      instance.context = newContext;
  
      return shouldUpdate;
    }
  
    return {
      adoptClassInstance: adoptClassInstance,
      constructClassInstance: constructClassInstance,
      mountClassInstance: mountClassInstance,
      // resumeMountClassInstance,
      updateClassInstance: updateClassInstance
    };
  };
  
  // The Symbol used to tag the special React types. If there is no native Symbol
  // nor polyfill, then a plain number is used for performance.
  var REACT_PORTAL_TYPE = typeof Symbol === 'function' && Symbol['for'] && Symbol['for']('react.portal') || 0xeaca;
  
  function createPortal$1(children, containerInfo,
  // TODO: figure out the API for cross-renderer implementation.
  implementation) {
    var key = arguments.length > 3 && arguments[3] !== undefined ? arguments[3] : null;
  
    return {
      // This tag allow us to uniquely identify this as a React Portal
      $$typeof: REACT_PORTAL_TYPE,
      key: key == null ? null : '' + key,
      children: children,
      containerInfo: containerInfo,
      implementation: implementation
    };
  }
  
  var getCurrentFiberStackAddendum$1 = ReactDebugCurrentFiber.getCurrentFiberStackAddendum;
  
  
  {
    var didWarnAboutMaps = false;
    /**
     * Warn if there's no key explicitly set on dynamic arrays of children or
     * object keys are not valid. This allows us to keep track of children between
     * updates.
     */
    var ownerHasKeyUseWarning = {};
    var ownerHasFunctionTypeWarning = {};
  
    var warnForMissingKey = function (child) {
      if (child === null || typeof child !== 'object') {
        return;
      }
      if (!child._store || child._store.validated || child.key != null) {
        return;
      }
      !(typeof child._store === 'object') ? invariant_1$1(false, 'React Component in warnForMissingKey should have a _store. This error is likely caused by a bug in React. Please file an issue.') : void 0;
      child._store.validated = true;
  
      var currentComponentErrorInfo = 'Each child in an array or iterator should have a unique ' + '"key" prop. See https://fb.me/react-warning-keys for ' + 'more information.' + (getCurrentFiberStackAddendum$1() || '');
      if (ownerHasKeyUseWarning[currentComponentErrorInfo]) {
        return;
      }
      ownerHasKeyUseWarning[currentComponentErrorInfo] = true;
  
      warning_1$1(false, 'Each child in an array or iterator should have a unique ' + '"key" prop. See https://fb.me/react-warning-keys for ' + 'more information.%s', getCurrentFiberStackAddendum$1());
    };
  }
  
  var isArray$1 = Array.isArray;
  
  var ITERATOR_SYMBOL = typeof Symbol === 'function' && Symbol.iterator;
  var FAUX_ITERATOR_SYMBOL = '@@iterator'; // Before Symbol spec.
  
  // The Symbol used to tag the ReactElement-like types. If there is no native Symbol
  // nor polyfill, then a plain number is used for performance.
  var REACT_ELEMENT_TYPE;
  var REACT_CALL_TYPE;
  var REACT_RETURN_TYPE;
  var REACT_FRAGMENT_TYPE;
  if (typeof Symbol === 'function' && Symbol['for']) {
    REACT_ELEMENT_TYPE = Symbol['for']('react.element');
    REACT_CALL_TYPE = Symbol['for']('react.call');
    REACT_RETURN_TYPE = Symbol['for']('react.return');
    REACT_FRAGMENT_TYPE = Symbol['for']('react.fragment');
  } else {
    REACT_ELEMENT_TYPE = 0xeac7;
    REACT_CALL_TYPE = 0xeac8;
    REACT_RETURN_TYPE = 0xeac9;
    REACT_FRAGMENT_TYPE = 0xeacb;
  }
  
  function getIteratorFn(maybeIterable) {
    if (maybeIterable === null || typeof maybeIterable === 'undefined') {
      return null;
    }
    var iteratorFn = ITERATOR_SYMBOL && maybeIterable[ITERATOR_SYMBOL] || maybeIterable[FAUX_ITERATOR_SYMBOL];
    if (typeof iteratorFn === 'function') {
      return iteratorFn;
    }
    return null;
  }
  
  function coerceRef(current, element) {
    var mixedRef = element.ref;
    if (mixedRef !== null && typeof mixedRef !== 'function') {
      if (element._owner) {
        var owner = element._owner;
        var inst = void 0;
        if (owner) {
          var ownerFiber = owner;
          !(ownerFiber.tag === ClassComponent) ? invariant_1$1(false, 'Stateless function components cannot have refs.') : void 0;
          inst = ownerFiber.stateNode;
        }
        !inst ? invariant_1$1(false, 'Missing owner for string ref %s. This error is likely caused by a bug in React. Please file an issue.', mixedRef) : void 0;
        var stringRef = '' + mixedRef;
        // Check if previous string ref matches new string ref
        if (current !== null && current.ref !== null && current.ref._stringRef === stringRef) {
          return current.ref;
        }
        var ref = function (value) {
          var refs = inst.refs === emptyObject_1 ? inst.refs = {} : inst.refs;
          if (value === null) {
            delete refs[stringRef];
          } else {
            refs[stringRef] = value;
          }
        };
        ref._stringRef = stringRef;
        return ref;
      } else {
        !(typeof mixedRef === 'string') ? invariant_1$1(false, 'Expected ref to be a function or a string.') : void 0;
        !element._owner ? invariant_1$1(false, 'Element ref was specified as a string (%s) but no owner was set. You may have multiple copies of React loaded. (details: https://fb.me/react-refs-must-have-owner).', mixedRef) : void 0;
      }
    }
    return mixedRef;
  }
  
  function throwOnInvalidObjectType(returnFiber, newChild) {
    if (returnFiber.type !== 'textarea') {
      var addendum = '';
      {
        addendum = ' If you meant to render a collection of children, use an array ' + 'instead.' + (getCurrentFiberStackAddendum$1() || '');
      }
      invariant_1$1(false, 'Objects are not valid as a React child (found: %s).%s', Object.prototype.toString.call(newChild) === '[object Object]' ? 'object with keys {' + Object.keys(newChild).join(', ') + '}' : newChild, addendum);
    }
  }
  
  function warnOnFunctionType() {
    var currentComponentErrorInfo = 'Functions are not valid as a React child. This may happen if ' + 'you return a Component instead of <Component /> from render. ' + 'Or maybe you meant to call this function rather than return it.' + (getCurrentFiberStackAddendum$1() || '');
  
    if (ownerHasFunctionTypeWarning[currentComponentErrorInfo]) {
      return;
    }
    ownerHasFunctionTypeWarning[currentComponentErrorInfo] = true;
  
    warning_1$1(false, 'Functions are not valid as a React child. This may happen if ' + 'you return a Component instead of <Component /> from render. ' + 'Or maybe you meant to call this function rather than return it.%s', getCurrentFiberStackAddendum$1() || '');
  }
  
  // This wrapper function exists because I expect to clone the code in each path
  // to be able to optimize each path individually by branching early. This needs
  // a compiler or we can do it manually. Helpers that don't need this branching
  // live outside of this function.
  function ChildReconciler(shouldClone, shouldTrackSideEffects) {
    function deleteChild(returnFiber, childToDelete) {
      if (!shouldTrackSideEffects) {
        // Noop.
        return;
      }
      if (!shouldClone) {
        // When we're reconciling in place we have a work in progress copy. We
        // actually want the current copy. If there is no current copy, then we
        // don't need to track deletion side-effects.
        if (childToDelete.alternate === null) {
          return;
        }
        childToDelete = childToDelete.alternate;
      }
      // Deletions are added in reversed order so we add it to the front.
      // At this point, the return fiber's effect list is empty except for
      // deletions, so we can just append the deletion to the list. The remaining
      // effects aren't added until the complete phase. Once we implement
      // resuming, this may not be true.
      var last = returnFiber.lastEffect;
      if (last !== null) {
        last.nextEffect = childToDelete;
        returnFiber.lastEffect = childToDelete;
      } else {
        returnFiber.firstEffect = returnFiber.lastEffect = childToDelete;
      }
      childToDelete.nextEffect = null;
      childToDelete.effectTag = Deletion;
    }
  
    function deleteRemainingChildren(returnFiber, currentFirstChild) {
      if (!shouldTrackSideEffects) {
        // Noop.
        return null;
      }
  
      // TODO: For the shouldClone case, this could be micro-optimized a bit by
      // assuming that after the first child we've already added everything.
      var childToDelete = currentFirstChild;
      while (childToDelete !== null) {
        deleteChild(returnFiber, childToDelete);
        childToDelete = childToDelete.sibling;
      }
      return null;
    }
  
    function mapRemainingChildren(returnFiber, currentFirstChild) {
      // Add the remaining children to a temporary map so that we can find them by
      // keys quickly. Implicit (null) keys get added to this set with their index
      var existingChildren = new Map();
  
      var existingChild = currentFirstChild;
      while (existingChild !== null) {
        if (existingChild.key !== null) {
          existingChildren.set(existingChild.key, existingChild);
        } else {
          existingChildren.set(existingChild.index, existingChild);
        }
        existingChild = existingChild.sibling;
      }
      return existingChildren;
    }
  
    function useFiber(fiber, pendingProps, expirationTime) {
      // We currently set sibling to null and index to 0 here because it is easy
      // to forget to do before returning it. E.g. for the single child case.
      if (shouldClone) {
        var clone = createWorkInProgress(fiber, pendingProps, expirationTime);
        clone.index = 0;
        clone.sibling = null;
        return clone;
      } else {
        // We override the expiration time even if it is earlier, because if
        // we're reconciling at a later time that means that this was
        // down-prioritized.
        fiber.expirationTime = expirationTime;
        fiber.effectTag = NoEffect;
        fiber.index = 0;
        fiber.sibling = null;
        fiber.pendingProps = pendingProps;
        return fiber;
      }
    }
  
    function placeChild(newFiber, lastPlacedIndex, newIndex) {
      newFiber.index = newIndex;
      if (!shouldTrackSideEffects) {
        // Noop.
        return lastPlacedIndex;
      }
      var current = newFiber.alternate;
      if (current !== null) {
        var oldIndex = current.index;
        if (oldIndex < lastPlacedIndex) {
          // This is a move.
          newFiber.effectTag = Placement;
          return lastPlacedIndex;
        } else {
          // This item can stay in place.
          return oldIndex;
        }
      } else {
        // This is an insertion.
        newFiber.effectTag = Placement;
        return lastPlacedIndex;
      }
    }
  
    function placeSingleChild(newFiber) {
      // This is simpler for the single child case. We only need to do a
      // placement for inserting new children.
      if (shouldTrackSideEffects && newFiber.alternate === null) {
        newFiber.effectTag = Placement;
      }
      return newFiber;
    }
  
    function updateTextNode(returnFiber, current, textContent, expirationTime) {
      if (current === null || current.tag !== HostText) {
        // Insert
        var created = createFiberFromText(textContent, returnFiber.internalContextTag, expirationTime);
        created['return'] = returnFiber;
        return created;
      } else {
        // Update
        var existing = useFiber(current, textContent, expirationTime);
        existing['return'] = returnFiber;
        return existing;
      }
    }
  
    function updateElement(returnFiber, current, element, expirationTime) {
      if (current !== null && current.type === element.type) {
        // Move based on index
        var existing = useFiber(current, element.props, expirationTime);
        existing.ref = coerceRef(current, element);
        existing['return'] = returnFiber;
        {
          existing._debugSource = element._source;
          existing._debugOwner = element._owner;
        }
        return existing;
      } else {
        // Insert
        var created = createFiberFromElement(element, returnFiber.internalContextTag, expirationTime);
        created.ref = coerceRef(current, element);
        created['return'] = returnFiber;
        return created;
      }
    }
  
    function updateCall(returnFiber, current, call, expirationTime) {
      // TODO: Should this also compare handler to determine whether to reuse?
      if (current === null || current.tag !== CallComponent) {
        // Insert
        var created = createFiberFromCall(call, returnFiber.internalContextTag, expirationTime);
        created['return'] = returnFiber;
        return created;
      } else {
        // Move based on index
        var existing = useFiber(current, call, expirationTime);
        existing['return'] = returnFiber;
        return existing;
      }
    }
  
    function updateReturn(returnFiber, current, returnNode, expirationTime) {
      if (current === null || current.tag !== ReturnComponent) {
        // Insert
        var created = createFiberFromReturn(returnNode, returnFiber.internalContextTag, expirationTime);
        created.type = returnNode.value;
        created['return'] = returnFiber;
        return created;
      } else {
        // Move based on index
        var existing = useFiber(current, null, expirationTime);
        existing.type = returnNode.value;
        existing['return'] = returnFiber;
        return existing;
      }
    }
  
    function updatePortal(returnFiber, current, portal, expirationTime) {
      if (current === null || current.tag !== HostPortal || current.stateNode.containerInfo !== portal.containerInfo || current.stateNode.implementation !== portal.implementation) {
        // Insert
        var created = createFiberFromPortal(portal, returnFiber.internalContextTag, expirationTime);
        created['return'] = returnFiber;
        return created;
      } else {
        // Update
        var existing = useFiber(current, portal.children || [], expirationTime);
        existing['return'] = returnFiber;
        return existing;
      }
    }
  
    function updateFragment(returnFiber, current, fragment, expirationTime, key) {
      if (current === null || current.tag !== Fragment) {
        // Insert
        var created = createFiberFromFragment(fragment, returnFiber.internalContextTag, expirationTime, key);
        created['return'] = returnFiber;
        return created;
      } else {
        // Update
        var existing = useFiber(current, fragment, expirationTime);
        existing['return'] = returnFiber;
        return existing;
      }
    }
  
    function createChild(returnFiber, newChild, expirationTime) {
      if (typeof newChild === 'string' || typeof newChild === 'number') {
        // Text nodes don't have keys. If the previous node is implicitly keyed
        // we can continue to replace it without aborting even if it is not a text
        // node.
        var created = createFiberFromText('' + newChild, returnFiber.internalContextTag, expirationTime);
        created['return'] = returnFiber;
        return created;
      }
  
      if (typeof newChild === 'object' && newChild !== null) {
        switch (newChild.$$typeof) {
          case REACT_ELEMENT_TYPE:
            {
              if (newChild.type === REACT_FRAGMENT_TYPE) {
                var _created = createFiberFromFragment(newChild.props.children, returnFiber.internalContextTag, expirationTime, newChild.key);
                _created['return'] = returnFiber;
                return _created;
              } else {
                var _created2 = createFiberFromElement(newChild, returnFiber.internalContextTag, expirationTime);
                _created2.ref = coerceRef(null, newChild);
                _created2['return'] = returnFiber;
                return _created2;
              }
            }
  
          case REACT_CALL_TYPE:
            {
              var _created3 = createFiberFromCall(newChild, returnFiber.internalContextTag, expirationTime);
              _created3['return'] = returnFiber;
              return _created3;
            }
  
          case REACT_RETURN_TYPE:
            {
              var _created4 = createFiberFromReturn(newChild, returnFiber.internalContextTag, expirationTime);
              _created4.type = newChild.value;
              _created4['return'] = returnFiber;
              return _created4;
            }
  
          case REACT_PORTAL_TYPE:
            {
              var _created5 = createFiberFromPortal(newChild, returnFiber.internalContextTag, expirationTime);
              _created5['return'] = returnFiber;
              return _created5;
            }
        }
  
        if (isArray$1(newChild) || getIteratorFn(newChild)) {
          var _created6 = createFiberFromFragment(newChild, returnFiber.internalContextTag, expirationTime, null);
          _created6['return'] = returnFiber;
          return _created6;
        }
  
        throwOnInvalidObjectType(returnFiber, newChild);
      }
  
      {
        if (typeof newChild === 'function') {
          warnOnFunctionType();
        }
      }
  
      return null;
    }
  
    function updateSlot(returnFiber, oldFiber, newChild, expirationTime) {
      // Update the fiber if the keys match, otherwise return null.
  
      var key = oldFiber !== null ? oldFiber.key : null;
  
      if (typeof newChild === 'string' || typeof newChild === 'number') {
        // Text nodes don't have keys. If the previous node is implicitly keyed
        // we can continue to replace it without aborting even if it is not a text
        // node.
        if (key !== null) {
          return null;
        }
        return updateTextNode(returnFiber, oldFiber, '' + newChild, expirationTime);
      }
  
      if (typeof newChild === 'object' && newChild !== null) {
        switch (newChild.$$typeof) {
          case REACT_ELEMENT_TYPE:
            {
              if (newChild.key === key) {
                if (newChild.type === REACT_FRAGMENT_TYPE) {
                  return updateFragment(returnFiber, oldFiber, newChild.props.children, expirationTime, key);
                }
                return updateElement(returnFiber, oldFiber, newChild, expirationTime);
              } else {
                return null;
              }
            }
  
          case REACT_CALL_TYPE:
            {
              if (newChild.key === key) {
                return updateCall(returnFiber, oldFiber, newChild, expirationTime);
              } else {
                return null;
              }
            }
  
          case REACT_RETURN_TYPE:
            {
              // Returns don't have keys. If the previous node is implicitly keyed
              // we can continue to replace it without aborting even if it is not a
              // yield.
              if (key === null) {
                return updateReturn(returnFiber, oldFiber, newChild, expirationTime);
              } else {
                return null;
              }
            }
  
          case REACT_PORTAL_TYPE:
            {
              if (newChild.key === key) {
                return updatePortal(returnFiber, oldFiber, newChild, expirationTime);
              } else {
                return null;
              }
            }
        }
  
        if (isArray$1(newChild) || getIteratorFn(newChild)) {
          if (key !== null) {
            return null;
          }
  
          return updateFragment(returnFiber, oldFiber, newChild, expirationTime, null);
        }
  
        throwOnInvalidObjectType(returnFiber, newChild);
      }
  
      {
        if (typeof newChild === 'function') {
          warnOnFunctionType();
        }
      }
  
      return null;
    }
  
    function updateFromMap(existingChildren, returnFiber, newIdx, newChild, expirationTime) {
      if (typeof newChild === 'string' || typeof newChild === 'number') {
        // Text nodes don't have keys, so we neither have to check the old nor
        // new node for the key. If both are text nodes, they match.
        var matchedFiber = existingChildren.get(newIdx) || null;
        return updateTextNode(returnFiber, matchedFiber, '' + newChild, expirationTime);
      }
  
      if (typeof newChild === 'object' && newChild !== null) {
        switch (newChild.$$typeof) {
          case REACT_ELEMENT_TYPE:
            {
              var _matchedFiber = existingChildren.get(newChild.key === null ? newIdx : newChild.key) || null;
              if (newChild.type === REACT_FRAGMENT_TYPE) {
                return updateFragment(returnFiber, _matchedFiber, newChild.props.children, expirationTime, newChild.key);
              }
              return updateElement(returnFiber, _matchedFiber, newChild, expirationTime);
            }
  
          case REACT_CALL_TYPE:
            {
              var _matchedFiber2 = existingChildren.get(newChild.key === null ? newIdx : newChild.key) || null;
              return updateCall(returnFiber, _matchedFiber2, newChild, expirationTime);
            }
  
          case REACT_RETURN_TYPE:
            {
              // Returns don't have keys, so we neither have to check the old nor
              // new node for the key. If both are returns, they match.
              var _matchedFiber3 = existingChildren.get(newIdx) || null;
              return updateReturn(returnFiber, _matchedFiber3, newChild, expirationTime);
            }
  
          case REACT_PORTAL_TYPE:
            {
              var _matchedFiber4 = existingChildren.get(newChild.key === null ? newIdx : newChild.key) || null;
              return updatePortal(returnFiber, _matchedFiber4, newChild, expirationTime);
            }
        }
  
        if (isArray$1(newChild) || getIteratorFn(newChild)) {
          var _matchedFiber5 = existingChildren.get(newIdx) || null;
          return updateFragment(returnFiber, _matchedFiber5, newChild, expirationTime, null);
        }
  
        throwOnInvalidObjectType(returnFiber, newChild);
      }
  
      {
        if (typeof newChild === 'function') {
          warnOnFunctionType();
        }
      }
  
      return null;
    }
  
    /**
     * Warns if there is a duplicate or missing key
     */
    function warnOnInvalidKey(child, knownKeys) {
      {
        if (typeof child !== 'object' || child === null) {
          return knownKeys;
        }
        switch (child.$$typeof) {
          case REACT_ELEMENT_TYPE:
          case REACT_CALL_TYPE:
          case REACT_PORTAL_TYPE:
            warnForMissingKey(child);
            var key = child.key;
            if (typeof key !== 'string') {
              break;
            }
            if (knownKeys === null) {
              knownKeys = new Set();
              knownKeys.add(key);
              break;
            }
            if (!knownKeys.has(key)) {
              knownKeys.add(key);
              break;
            }
            warning_1$1(false, 'Encountered two children with the same key, `%s`. ' + 'Keys should be unique so that components maintain their identity ' + 'across updates. Non-unique keys may cause children to be ' + 'duplicated and/or omitted — the behavior is unsupported and ' + 'could change in a future version.%s', key, getCurrentFiberStackAddendum$1());
            break;
          default:
            break;
        }
      }
      return knownKeys;
    }
  
    function reconcileChildrenArray(returnFiber, currentFirstChild, newChildren, expirationTime) {
      // This algorithm can't optimize by searching from boths ends since we
      // don't have backpointers on fibers. I'm trying to see how far we can get
      // with that model. If it ends up not being worth the tradeoffs, we can
      // add it later.
  
      // Even with a two ended optimization, we'd want to optimize for the case
      // where there are few changes and brute force the comparison instead of
      // going for the Map. It'd like to explore hitting that path first in
      // forward-only mode and only go for the Map once we notice that we need
      // lots of look ahead. This doesn't handle reversal as well as two ended
      // search but that's unusual. Besides, for the two ended optimization to
      // work on Iterables, we'd need to copy the whole set.
  
      // In this first iteration, we'll just live with hitting the bad case
      // (adding everything to a Map) in for every insert/move.
  
      // If you change this code, also update reconcileChildrenIterator() which
      // uses the same algorithm.
  
      {
        // First, validate keys.
        var knownKeys = null;
        for (var i = 0; i < newChildren.length; i++) {
          var child = newChildren[i];
          knownKeys = warnOnInvalidKey(child, knownKeys);
        }
      }
  
      var resultingFirstChild = null;
      var previousNewFiber = null;
  
      var oldFiber = currentFirstChild;
      var lastPlacedIndex = 0;
      var newIdx = 0;
      var nextOldFiber = null;
      for (; oldFiber !== null && newIdx < newChildren.length; newIdx++) {
        if (oldFiber.index > newIdx) {
          nextOldFiber = oldFiber;
          oldFiber = null;
        } else {
          nextOldFiber = oldFiber.sibling;
        }
        var newFiber = updateSlot(returnFiber, oldFiber, newChildren[newIdx], expirationTime);
        if (newFiber === null) {
          // TODO: This breaks on empty slots like null children. That's
          // unfortunate because it triggers the slow path all the time. We need
          // a better way to communicate whether this was a miss or null,
          // boolean, undefined, etc.
          if (oldFiber === null) {
            oldFiber = nextOldFiber;
          }
          break;
        }
        if (shouldTrackSideEffects) {
          if (oldFiber && newFiber.alternate === null) {
            // We matched the slot, but we didn't reuse the existing fiber, so we
            // need to delete the existing child.
            deleteChild(returnFiber, oldFiber);
          }
        }
        lastPlacedIndex = placeChild(newFiber, lastPlacedIndex, newIdx);
        if (previousNewFiber === null) {
          // TODO: Move out of the loop. This only happens for the first run.
          resultingFirstChild = newFiber;
        } else {
          // TODO: Defer siblings if we're not at the right index for this slot.
          // I.e. if we had null values before, then we want to defer this
          // for each null value. However, we also don't want to call updateSlot
          // with the previous one.
          previousNewFiber.sibling = newFiber;
        }
        previousNewFiber = newFiber;
        oldFiber = nextOldFiber;
      }
  
      if (newIdx === newChildren.length) {
        // We've reached the end of the new children. We can delete the rest.
        deleteRemainingChildren(returnFiber, oldFiber);
        return resultingFirstChild;
      }
  
      if (oldFiber === null) {
        // If we don't have any more existing children we can choose a fast path
        // since the rest will all be insertions.
        for (; newIdx < newChildren.length; newIdx++) {
          var _newFiber = createChild(returnFiber, newChildren[newIdx], expirationTime);
          if (!_newFiber) {
            continue;
          }
          lastPlacedIndex = placeChild(_newFiber, lastPlacedIndex, newIdx);
          if (previousNewFiber === null) {
            // TODO: Move out of the loop. This only happens for the first run.
            resultingFirstChild = _newFiber;
          } else {
            previousNewFiber.sibling = _newFiber;
          }
          previousNewFiber = _newFiber;
        }
        return resultingFirstChild;
      }
  
      // Add all children to a key map for quick lookups.
      var existingChildren = mapRemainingChildren(returnFiber, oldFiber);
  
      // Keep scanning and use the map to restore deleted items as moves.
      for (; newIdx < newChildren.length; newIdx++) {
        var _newFiber2 = updateFromMap(existingChildren, returnFiber, newIdx, newChildren[newIdx], expirationTime);
        if (_newFiber2) {
          if (shouldTrackSideEffects) {
            if (_newFiber2.alternate !== null) {
              // The new fiber is a work in progress, but if there exists a
              // current, that means that we reused the fiber. We need to delete
              // it from the child list so that we don't add it to the deletion
              // list.
              existingChildren['delete'](_newFiber2.key === null ? newIdx : _newFiber2.key);
            }
          }
          lastPlacedIndex = placeChild(_newFiber2, lastPlacedIndex, newIdx);
          if (previousNewFiber === null) {
            resultingFirstChild = _newFiber2;
          } else {
            previousNewFiber.sibling = _newFiber2;
          }
          previousNewFiber = _newFiber2;
        }
      }
  
      if (shouldTrackSideEffects) {
        // Any existing children that weren't consumed above were deleted. We need
        // to add them to the deletion list.
        existingChildren.forEach(function (child) {
          return deleteChild(returnFiber, child);
        });
      }
  
      return resultingFirstChild;
    }
  
    function reconcileChildrenIterator(returnFiber, currentFirstChild, newChildrenIterable, expirationTime) {
      // This is the same implementation as reconcileChildrenArray(),
      // but using the iterator instead.
  
      var iteratorFn = getIteratorFn(newChildrenIterable);
      !(typeof iteratorFn === 'function') ? invariant_1$1(false, 'An object is not an iterable. This error is likely caused by a bug in React. Please file an issue.') : void 0;
  
      {
        // Warn about using Maps as children
        if (typeof newChildrenIterable.entries === 'function') {
          var possibleMap = newChildrenIterable;
          if (possibleMap.entries === iteratorFn) {
            warning_1$1(didWarnAboutMaps, 'Using Maps as children is unsupported and will likely yield ' + 'unexpected results. Convert it to a sequence/iterable of keyed ' + 'ReactElements instead.%s', getCurrentFiberStackAddendum$1());
            didWarnAboutMaps = true;
          }
        }
  
        // First, validate keys.
        // We'll get a different iterator later for the main pass.
        var _newChildren = iteratorFn.call(newChildrenIterable);
        if (_newChildren) {
          var knownKeys = null;
          var _step = _newChildren.next();
          for (; !_step.done; _step = _newChildren.next()) {
            var child = _step.value;
            knownKeys = warnOnInvalidKey(child, knownKeys);
          }
        }
      }
  
      var newChildren = iteratorFn.call(newChildrenIterable);
      !(newChildren != null) ? invariant_1$1(false, 'An iterable object provided no iterator.') : void 0;
  
      var resultingFirstChild = null;
      var previousNewFiber = null;
  
      var oldFiber = currentFirstChild;
      var lastPlacedIndex = 0;
      var newIdx = 0;
      var nextOldFiber = null;
  
      var step = newChildren.next();
      for (; oldFiber !== null && !step.done; newIdx++, step = newChildren.next()) {
        if (oldFiber.index > newIdx) {
          nextOldFiber = oldFiber;
          oldFiber = null;
        } else {
          nextOldFiber = oldFiber.sibling;
        }
        var newFiber = updateSlot(returnFiber, oldFiber, step.value, expirationTime);
        if (newFiber === null) {
          // TODO: This breaks on empty slots like null children. That's
          // unfortunate because it triggers the slow path all the time. We need
          // a better way to communicate whether this was a miss or null,
          // boolean, undefined, etc.
          if (!oldFiber) {
            oldFiber = nextOldFiber;
          }
          break;
        }
        if (shouldTrackSideEffects) {
          if (oldFiber && newFiber.alternate === null) {
            // We matched the slot, but we didn't reuse the existing fiber, so we
            // need to delete the existing child.
            deleteChild(returnFiber, oldFiber);
          }
        }
        lastPlacedIndex = placeChild(newFiber, lastPlacedIndex, newIdx);
        if (previousNewFiber === null) {
          // TODO: Move out of the loop. This only happens for the first run.
          resultingFirstChild = newFiber;
        } else {
          // TODO: Defer siblings if we're not at the right index for this slot.
          // I.e. if we had null values before, then we want to defer this
          // for each null value. However, we also don't want to call updateSlot
          // with the previous one.
          previousNewFiber.sibling = newFiber;
        }
        previousNewFiber = newFiber;
        oldFiber = nextOldFiber;
      }
  
      if (step.done) {
        // We've reached the end of the new children. We can delete the rest.
        deleteRemainingChildren(returnFiber, oldFiber);
        return resultingFirstChild;
      }
  
      if (oldFiber === null) {
        // If we don't have any more existing children we can choose a fast path
        // since the rest will all be insertions.
        for (; !step.done; newIdx++, step = newChildren.next()) {
          var _newFiber3 = createChild(returnFiber, step.value, expirationTime);
          if (_newFiber3 === null) {
            continue;
          }
          lastPlacedIndex = placeChild(_newFiber3, lastPlacedIndex, newIdx);
          if (previousNewFiber === null) {
            // TODO: Move out of the loop. This only happens for the first run.
            resultingFirstChild = _newFiber3;
          } else {
            previousNewFiber.sibling = _newFiber3;
          }
          previousNewFiber = _newFiber3;
        }
        return resultingFirstChild;
      }
  
      // Add all children to a key map for quick lookups.
      var existingChildren = mapRemainingChildren(returnFiber, oldFiber);
  
      // Keep scanning and use the map to restore deleted items as moves.
      for (; !step.done; newIdx++, step = newChildren.next()) {
        var _newFiber4 = updateFromMap(existingChildren, returnFiber, newIdx, step.value, expirationTime);
        if (_newFiber4 !== null) {
          if (shouldTrackSideEffects) {
            if (_newFiber4.alternate !== null) {
              // The new fiber is a work in progress, but if there exists a
              // current, that means that we reused the fiber. We need to delete
              // it from the child list so that we don't add it to the deletion
              // list.
              existingChildren['delete'](_newFiber4.key === null ? newIdx : _newFiber4.key);
            }
          }
          lastPlacedIndex = placeChild(_newFiber4, lastPlacedIndex, newIdx);
          if (previousNewFiber === null) {
            resultingFirstChild = _newFiber4;
          } else {
            previousNewFiber.sibling = _newFiber4;
          }
          previousNewFiber = _newFiber4;
        }
      }
  
      if (shouldTrackSideEffects) {
        // Any existing children that weren't consumed above were deleted. We need
        // to add them to the deletion list.
        existingChildren.forEach(function (child) {
          return deleteChild(returnFiber, child);
        });
      }
  
      return resultingFirstChild;
    }
  
    function reconcileSingleTextNode(returnFiber, currentFirstChild, textContent, expirationTime) {
      // There's no need to check for keys on text nodes since we don't have a
      // way to define them.
      if (currentFirstChild !== null && currentFirstChild.tag === HostText) {
        // We already have an existing node so let's just update it and delete
        // the rest.
        deleteRemainingChildren(returnFiber, currentFirstChild.sibling);
        var existing = useFiber(currentFirstChild, textContent, expirationTime);
        existing['return'] = returnFiber;
        return existing;
      }
      // The existing first child is not a text node so we need to create one
      // and delete the existing ones.
      deleteRemainingChildren(returnFiber, currentFirstChild);
      var created = createFiberFromText(textContent, returnFiber.internalContextTag, expirationTime);
      created['return'] = returnFiber;
      return created;
    }
  
    function reconcileSingleElement(returnFiber, currentFirstChild, element, expirationTime) {
      var key = element.key;
      var child = currentFirstChild;
      while (child !== null) {
        // TODO: If key === null and child.key === null, then this only applies to
        // the first item in the list.
        if (child.key === key) {
          if (child.tag === Fragment ? element.type === REACT_FRAGMENT_TYPE : child.type === element.type) {
            deleteRemainingChildren(returnFiber, child.sibling);
            var existing = useFiber(child, element.type === REACT_FRAGMENT_TYPE ? element.props.children : element.props, expirationTime);
            existing.ref = coerceRef(child, element);
            existing['return'] = returnFiber;
            {
              existing._debugSource = element._source;
              existing._debugOwner = element._owner;
            }
            return existing;
          } else {
            deleteRemainingChildren(returnFiber, child);
            break;
          }
        } else {
          deleteChild(returnFiber, child);
        }
        child = child.sibling;
      }
  
      if (element.type === REACT_FRAGMENT_TYPE) {
        var created = createFiberFromFragment(element.props.children, returnFiber.internalContextTag, expirationTime, element.key);
        created['return'] = returnFiber;
        return created;
      } else {
        var _created7 = createFiberFromElement(element, returnFiber.internalContextTag, expirationTime);
        _created7.ref = coerceRef(currentFirstChild, element);
        _created7['return'] = returnFiber;
        return _created7;
      }
    }
  
    function reconcileSingleCall(returnFiber, currentFirstChild, call, expirationTime) {
      var key = call.key;
      var child = currentFirstChild;
      while (child !== null) {
        // TODO: If key === null and child.key === null, then this only applies to
        // the first item in the list.
        if (child.key === key) {
          if (child.tag === CallComponent) {
            deleteRemainingChildren(returnFiber, child.sibling);
            var existing = useFiber(child, call, expirationTime);
            existing['return'] = returnFiber;
            return existing;
          } else {
            deleteRemainingChildren(returnFiber, child);
            break;
          }
        } else {
          deleteChild(returnFiber, child);
        }
        child = child.sibling;
      }
  
      var created = createFiberFromCall(call, returnFiber.internalContextTag, expirationTime);
      created['return'] = returnFiber;
      return created;
    }
  
    function reconcileSingleReturn(returnFiber, currentFirstChild, returnNode, expirationTime) {
      // There's no need to check for keys on yields since they're stateless.
      var child = currentFirstChild;
      if (child !== null) {
        if (child.tag === ReturnComponent) {
          deleteRemainingChildren(returnFiber, child.sibling);
          var existing = useFiber(child, null, expirationTime);
          existing.type = returnNode.value;
          existing['return'] = returnFiber;
          return existing;
        } else {
          deleteRemainingChildren(returnFiber, child);
        }
      }
  
      var created = createFiberFromReturn(returnNode, returnFiber.internalContextTag, expirationTime);
      created.type = returnNode.value;
      created['return'] = returnFiber;
      return created;
    }
  
    function reconcileSinglePortal(returnFiber, currentFirstChild, portal, expirationTime) {
      var key = portal.key;
      var child = currentFirstChild;
      while (child !== null) {
        // TODO: If key === null and child.key === null, then this only applies to
        // the first item in the list.
        if (child.key === key) {
          if (child.tag === HostPortal && child.stateNode.containerInfo === portal.containerInfo && child.stateNode.implementation === portal.implementation) {
            deleteRemainingChildren(returnFiber, child.sibling);
            var existing = useFiber(child, portal.children || [], expirationTime);
            existing['return'] = returnFiber;
            return existing;
          } else {
            deleteRemainingChildren(returnFiber, child);
            break;
          }
        } else {
          deleteChild(returnFiber, child);
        }
        child = child.sibling;
      }
  
      var created = createFiberFromPortal(portal, returnFiber.internalContextTag, expirationTime);
      created['return'] = returnFiber;
      return created;
    }
  
    // This API will tag the children with the side-effect of the reconciliation
    // itself. They will be added to the side-effect list as we pass through the
    // children and the parent.
    function reconcileChildFibers(returnFiber, currentFirstChild, newChild, expirationTime) {
      // This function is not recursive.
      // If the top level item is an array, we treat it as a set of children,
      // not as a fragment. Nested arrays on the other hand will be treated as
      // fragment nodes. Recursion happens at the normal flow.
  
      // Handle top level unkeyed fragments as if they were arrays.
      // This leads to an ambiguity between <>{[...]}</> and <>...</>.
      // We treat the ambiguous cases above the same.
      if (enableReactFragment && typeof newChild === 'object' && newChild !== null && newChild.type === REACT_FRAGMENT_TYPE && newChild.key === null) {
        newChild = newChild.props.children;
      }
  
      // Handle object types
      var isObject = typeof newChild === 'object' && newChild !== null;
  
      if (isObject) {
        switch (newChild.$$typeof) {
          case REACT_ELEMENT_TYPE:
            return placeSingleChild(reconcileSingleElement(returnFiber, currentFirstChild, newChild, expirationTime));
  
          case REACT_CALL_TYPE:
            return placeSingleChild(reconcileSingleCall(returnFiber, currentFirstChild, newChild, expirationTime));
          case REACT_RETURN_TYPE:
            return placeSingleChild(reconcileSingleReturn(returnFiber, currentFirstChild, newChild, expirationTime));
          case REACT_PORTAL_TYPE:
            return placeSingleChild(reconcileSinglePortal(returnFiber, currentFirstChild, newChild, expirationTime));
        }
      }
  
      if (typeof newChild === 'string' || typeof newChild === 'number') {
        return placeSingleChild(reconcileSingleTextNode(returnFiber, currentFirstChild, '' + newChild, expirationTime));
      }
  
      if (isArray$1(newChild)) {
        return reconcileChildrenArray(returnFiber, currentFirstChild, newChild, expirationTime);
      }
  
      if (getIteratorFn(newChild)) {
        return reconcileChildrenIterator(returnFiber, currentFirstChild, newChild, expirationTime);
      }
  
      if (isObject) {
        throwOnInvalidObjectType(returnFiber, newChild);
      }
  
      {
        if (typeof newChild === 'function') {
          warnOnFunctionType();
        }
      }
      if (typeof newChild === 'undefined') {
        // If the new child is undefined, and the return fiber is a composite
        // component, throw an error. If Fiber return types are disabled,
        // we already threw above.
        switch (returnFiber.tag) {
          case ClassComponent:
            {
              {
                var instance = returnFiber.stateNode;
                if (instance.render._isMockFunction) {
                  // We allow auto-mocks to proceed as if they're returning null.
                  break;
                }
              }
            }
          // Intentionally fall through to the next case, which handles both
          // functions and classes
          // eslint-disable-next-lined no-fallthrough
          case FunctionalComponent:
            {
              var Component = returnFiber.type;
              invariant_1$1(false, '%s(...): Nothing was returned from render. This usually means a return statement is missing. Or, to render nothing, return null.', Component.displayName || Component.name || 'Component');
            }
        }
      }
  
      // Remaining cases are all treated as empty.
      return deleteRemainingChildren(returnFiber, currentFirstChild);
    }
  
    return reconcileChildFibers;
  }
  
  var reconcileChildFibers = ChildReconciler(true, true);
  
  var reconcileChildFibersInPlace = ChildReconciler(false, true);
  
  var mountChildFibersInPlace = ChildReconciler(false, false);
  
  function cloneChildFibers(current, workInProgress) {
    !(current === null || workInProgress.child === current.child) ? invariant_1$1(false, 'Resuming work not yet implemented.') : void 0;
  
    if (workInProgress.child === null) {
      return;
    }
  
    var currentChild = workInProgress.child;
    var newChild = createWorkInProgress(currentChild, currentChild.pendingProps, currentChild.expirationTime);
    workInProgress.child = newChild;
  
    newChild['return'] = workInProgress;
    while (currentChild.sibling !== null) {
      currentChild = currentChild.sibling;
      newChild = newChild.sibling = createWorkInProgress(currentChild, currentChild.pendingProps, currentChild.expirationTime);
      newChild['return'] = workInProgress;
    }
    newChild.sibling = null;
  }
  
  {
    var warnedAboutStatelessRefs = {};
  }
  
  var ReactFiberBeginWork = function (config, hostContext, hydrationContext, scheduleWork, computeExpirationForFiber) {
    var shouldSetTextContent = config.shouldSetTextContent,
        useSyncScheduling = config.useSyncScheduling,
        shouldDeprioritizeSubtree = config.shouldDeprioritizeSubtree;
    var pushHostContext = hostContext.pushHostContext,
        pushHostContainer = hostContext.pushHostContainer;
    var enterHydrationState = hydrationContext.enterHydrationState,
        resetHydrationState = hydrationContext.resetHydrationState,
        tryToClaimNextHydratableInstance = hydrationContext.tryToClaimNextHydratableInstance;
  
    var _ReactFiberClassCompo = ReactFiberClassComponent(scheduleWork, computeExpirationForFiber, memoizeProps, memoizeState),
        adoptClassInstance = _ReactFiberClassCompo.adoptClassInstance,
        constructClassInstance = _ReactFiberClassCompo.constructClassInstance,
        mountClassInstance = _ReactFiberClassCompo.mountClassInstance,
        updateClassInstance = _ReactFiberClassCompo.updateClassInstance;
  
    // TODO: Remove this and use reconcileChildrenAtExpirationTime directly.
  
  
    function reconcileChildren(current, workInProgress, nextChildren) {
      reconcileChildrenAtExpirationTime(current, workInProgress, nextChildren, workInProgress.expirationTime);
    }
  
    function reconcileChildrenAtExpirationTime(current, workInProgress, nextChildren, renderExpirationTime) {
      if (current === null) {
        // If this is a fresh new component that hasn't been rendered yet, we
        // won't update its child set by applying minimal side-effects. Instead,
        // we will add them all to the child before it gets rendered. That means
        // we can optimize this reconciliation pass by not tracking side-effects.
        workInProgress.child = mountChildFibersInPlace(workInProgress, workInProgress.child, nextChildren, renderExpirationTime);
      } else if (current.child === workInProgress.child) {
        // If the current child is the same as the work in progress, it means that
        // we haven't yet started any work on these children. Therefore, we use
        // the clone algorithm to create a copy of all the current children.
  
        // If we had any progressed work already, that is invalid at this point so
        // let's throw it out.
        workInProgress.child = reconcileChildFibers(workInProgress, workInProgress.child, nextChildren, renderExpirationTime);
      } else {
        // If, on the other hand, it is already using a clone, that means we've
        // already begun some work on this tree and we can continue where we left
        // off by reconciling against the existing children.
        workInProgress.child = reconcileChildFibersInPlace(workInProgress, workInProgress.child, nextChildren, renderExpirationTime);
      }
    }
  
    function updateFragment(current, workInProgress) {
      var nextChildren = workInProgress.pendingProps;
      if (hasContextChanged()) {
        // Normally we can bail out on props equality but if context has changed
        // we don't do the bailout and we have to reuse existing props instead.
        if (nextChildren === null) {
          nextChildren = workInProgress.memoizedProps;
        }
      } else if (nextChildren === null || workInProgress.memoizedProps === nextChildren) {
        return bailoutOnAlreadyFinishedWork(current, workInProgress);
      }
      reconcileChildren(current, workInProgress, nextChildren);
      memoizeProps(workInProgress, nextChildren);
      return workInProgress.child;
    }
  
    function markRef(current, workInProgress) {
      var ref = workInProgress.ref;
      if (ref !== null && (!current || current.ref !== ref)) {
        // Schedule a Ref effect
        workInProgress.effectTag |= Ref;
      }
    }
  
    function updateFunctionalComponent(current, workInProgress) {
      var fn = workInProgress.type;
      var nextProps = workInProgress.pendingProps;
  
      var memoizedProps = workInProgress.memoizedProps;
      if (hasContextChanged()) {
        // Normally we can bail out on props equality but if context has changed
        // we don't do the bailout and we have to reuse existing props instead.
        if (nextProps === null) {
          nextProps = memoizedProps;
        }
      } else {
        if (nextProps === null || memoizedProps === nextProps) {
          return bailoutOnAlreadyFinishedWork(current, workInProgress);
        }
        // TODO: consider bringing fn.shouldComponentUpdate() back.
        // It used to be here.
      }
  
      var unmaskedContext = getUnmaskedContext(workInProgress);
      var context = getMaskedContext(workInProgress, unmaskedContext);
  
      var nextChildren;
  
      {
        ReactCurrentOwner.current = workInProgress;
        ReactDebugCurrentFiber.setCurrentPhase('render');
        nextChildren = fn(nextProps, context);
        ReactDebugCurrentFiber.setCurrentPhase(null);
      }
      // React DevTools reads this flag.
      workInProgress.effectTag |= PerformedWork;
      reconcileChildren(current, workInProgress, nextChildren);
      memoizeProps(workInProgress, nextProps);
      return workInProgress.child;
    }
  
    function updateClassComponent(current, workInProgress, renderExpirationTime) {
      // Push context providers early to prevent context stack mismatches.
      // During mounting we don't know the child context yet as the instance doesn't exist.
      // We will invalidate the child context in finishClassComponent() right after rendering.
      var hasContext = pushContextProvider(workInProgress);
  
      var shouldUpdate = void 0;
      if (current === null) {
        if (!workInProgress.stateNode) {
          // In the initial pass we might need to construct the instance.
          constructClassInstance(workInProgress, workInProgress.pendingProps);
          mountClassInstance(workInProgress, renderExpirationTime);
          shouldUpdate = true;
        } else {
          invariant_1$1(false, 'Resuming work not yet implemented.');
          // In a resume, we'll already have an instance we can reuse.
          // shouldUpdate = resumeMountClassInstance(workInProgress, renderExpirationTime);
        }
      } else {
        shouldUpdate = updateClassInstance(current, workInProgress, renderExpirationTime);
      }
      return finishClassComponent(current, workInProgress, shouldUpdate, hasContext);
    }
  
    function finishClassComponent(current, workInProgress, shouldUpdate, hasContext) {
      // Refs should update even if shouldComponentUpdate returns false
      markRef(current, workInProgress);
  
      if (!shouldUpdate) {
        // Context providers should defer to sCU for rendering
        if (hasContext) {
          invalidateContextProvider(workInProgress, false);
        }
  
        return bailoutOnAlreadyFinishedWork(current, workInProgress);
      }
  
      var instance = workInProgress.stateNode;
  
      // Rerender
      ReactCurrentOwner.current = workInProgress;
      var nextChildren = void 0;
      {
        ReactDebugCurrentFiber.setCurrentPhase('render');
        nextChildren = instance.render();
        ReactDebugCurrentFiber.setCurrentPhase(null);
      }
      // React DevTools reads this flag.
      workInProgress.effectTag |= PerformedWork;
      reconcileChildren(current, workInProgress, nextChildren);
      // Memoize props and state using the values we just used to render.
      // TODO: Restructure so we never read values from the instance.
      memoizeState(workInProgress, instance.state);
      memoizeProps(workInProgress, instance.props);
  
      // The context might have changed so we need to recalculate it.
      if (hasContext) {
        invalidateContextProvider(workInProgress, true);
      }
  
      return workInProgress.child;
    }
  
    function pushHostRootContext(workInProgress) {
      var root = workInProgress.stateNode;
      if (root.pendingContext) {
        pushTopLevelContextObject(workInProgress, root.pendingContext, root.pendingContext !== root.context);
      } else if (root.context) {
        // Should always be set
        pushTopLevelContextObject(workInProgress, root.context, false);
      }
      pushHostContainer(workInProgress, root.containerInfo);
    }
  
    function updateHostRoot(current, workInProgress, renderExpirationTime) {
      pushHostRootContext(workInProgress);
      var updateQueue = workInProgress.updateQueue;
      if (updateQueue !== null) {
        var prevState = workInProgress.memoizedState;
        var state = processUpdateQueue(current, workInProgress, updateQueue, null, null, renderExpirationTime);
        if (prevState === state) {
          // If the state is the same as before, that's a bailout because we had
          // no work that expires at this time.
          resetHydrationState();
          return bailoutOnAlreadyFinishedWork(current, workInProgress);
        }
        var element = state.element;
        var root = workInProgress.stateNode;
        if ((current === null || current.child === null) && root.hydrate && enterHydrationState(workInProgress)) {
          // If we don't have any current children this might be the first pass.
          // We always try to hydrate. If this isn't a hydration pass there won't
          // be any children to hydrate which is effectively the same thing as
          // not hydrating.
  
          // This is a bit of a hack. We track the host root as a placement to
          // know that we're currently in a mounting state. That way isMounted
          // works as expected. We must reset this before committing.
          // TODO: Delete this when we delete isMounted and findDOMNode.
          workInProgress.effectTag |= Placement;
  
          // Ensure that children mount into this root without tracking
          // side-effects. This ensures that we don't store Placement effects on
          // nodes that will be hydrated.
          workInProgress.child = mountChildFibersInPlace(workInProgress, workInProgress.child, element, renderExpirationTime);
        } else {
          // Otherwise reset hydration state in case we aborted and resumed another
          // root.
          resetHydrationState();
          reconcileChildren(current, workInProgress, element);
        }
        memoizeState(workInProgress, state);
        return workInProgress.child;
      }
      resetHydrationState();
      // If there is no update queue, that's a bailout because the root has no props.
      return bailoutOnAlreadyFinishedWork(current, workInProgress);
    }
  
    function updateHostComponent(current, workInProgress, renderExpirationTime) {
      pushHostContext(workInProgress);
  
      if (current === null) {
        tryToClaimNextHydratableInstance(workInProgress);
      }
  
      var type = workInProgress.type;
      var memoizedProps = workInProgress.memoizedProps;
      var nextProps = workInProgress.pendingProps;
      if (nextProps === null) {
        nextProps = memoizedProps;
        !(nextProps !== null) ? invariant_1$1(false, 'We should always have pending or current props. This error is likely caused by a bug in React. Please file an issue.') : void 0;
      }
      var prevProps = current !== null ? current.memoizedProps : null;
  
      if (hasContextChanged()) {
        // Normally we can bail out on props equality but if context has changed
        // we don't do the bailout and we have to reuse existing props instead.
      } else if (nextProps === null || memoizedProps === nextProps) {
        return bailoutOnAlreadyFinishedWork(current, workInProgress);
      }
  
      var nextChildren = nextProps.children;
      var isDirectTextChild = shouldSetTextContent(type, nextProps);
  
      if (isDirectTextChild) {
        // We special case a direct text child of a host node. This is a common
        // case. We won't handle it as a reified child. We will instead handle
        // this in the host environment that also have access to this prop. That
        // avoids allocating another HostText fiber and traversing it.
        nextChildren = null;
      } else if (prevProps && shouldSetTextContent(type, prevProps)) {
        // If we're switching from a direct text child to a normal child, or to
        // empty, we need to schedule the text content to be reset.
        workInProgress.effectTag |= ContentReset;
      }
  
      markRef(current, workInProgress);
  
      // Check the host config to see if the children are offscreen/hidden.
      if (renderExpirationTime !== Never && !useSyncScheduling && shouldDeprioritizeSubtree(type, nextProps)) {
        // Down-prioritize the children.
        workInProgress.expirationTime = Never;
        // Bailout and come back to this fiber later.
        return null;
      }
  
      reconcileChildren(current, workInProgress, nextChildren);
      memoizeProps(workInProgress, nextProps);
      return workInProgress.child;
    }
  
    function updateHostText(current, workInProgress) {
      if (current === null) {
        tryToClaimNextHydratableInstance(workInProgress);
      }
      var nextProps = workInProgress.pendingProps;
      if (nextProps === null) {
        nextProps = workInProgress.memoizedProps;
      }
      memoizeProps(workInProgress, nextProps);
      // Nothing to do here. This is terminal. We'll do the completion step
      // immediately after.
      return null;
    }
  
    function mountIndeterminateComponent(current, workInProgress, renderExpirationTime) {
      !(current === null) ? invariant_1$1(false, 'An indeterminate component should never have mounted. This error is likely caused by a bug in React. Please file an issue.') : void 0;
      var fn = workInProgress.type;
      var props = workInProgress.pendingProps;
      var unmaskedContext = getUnmaskedContext(workInProgress);
      var context = getMaskedContext(workInProgress, unmaskedContext);
  
      var value;
  
      {
        if (fn.prototype && typeof fn.prototype.render === 'function') {
          var componentName = getComponentName(workInProgress);
          warning_1$1(false, "The <%s /> component appears to have a render method, but doesn't extend React.Component. " + 'This is likely to cause errors. Change %s to extend React.Component instead.', componentName, componentName);
        }
        ReactCurrentOwner.current = workInProgress;
        value = fn(props, context);
      }
      // React DevTools reads this flag.
      workInProgress.effectTag |= PerformedWork;
  
      if (typeof value === 'object' && value !== null && typeof value.render === 'function') {
        // Proceed under the assumption that this is a class instance
        workInProgress.tag = ClassComponent;
  
        // Push context providers early to prevent context stack mismatches.
        // During mounting we don't know the child context yet as the instance doesn't exist.
        // We will invalidate the child context in finishClassComponent() right after rendering.
        var hasContext = pushContextProvider(workInProgress);
        adoptClassInstance(workInProgress, value);
        mountClassInstance(workInProgress, renderExpirationTime);
        return finishClassComponent(current, workInProgress, true, hasContext);
      } else {
        // Proceed under the assumption that this is a functional component
        workInProgress.tag = FunctionalComponent;
        {
          var Component = workInProgress.type;
  
          if (Component) {
            warning_1$1(!Component.childContextTypes, '%s(...): childContextTypes cannot be defined on a functional component.', Component.displayName || Component.name || 'Component');
          }
          if (workInProgress.ref !== null) {
            var info = '';
            var ownerName = ReactDebugCurrentFiber.getCurrentFiberOwnerName();
            if (ownerName) {
              info += '\n\nCheck the render method of `' + ownerName + '`.';
            }
  
            var warningKey = ownerName || workInProgress._debugID || '';
            var debugSource = workInProgress._debugSource;
            if (debugSource) {
              warningKey = debugSource.fileName + ':' + debugSource.lineNumber;
            }
            if (!warnedAboutStatelessRefs[warningKey]) {
              warnedAboutStatelessRefs[warningKey] = true;
              warning_1$1(false, 'Stateless function components cannot be given refs. ' + 'Attempts to access this ref will fail.%s%s', info, ReactDebugCurrentFiber.getCurrentFiberStackAddendum());
            }
          }
        }
        reconcileChildren(current, workInProgress, value);
        memoizeProps(workInProgress, props);
        return workInProgress.child;
      }
    }
  
    function updateCallComponent(current, workInProgress, renderExpirationTime) {
      var nextCall = workInProgress.pendingProps;
      if (hasContextChanged()) {
        // Normally we can bail out on props equality but if context has changed
        // we don't do the bailout and we have to reuse existing props instead.
        if (nextCall === null) {
          nextCall = current && current.memoizedProps;
          !(nextCall !== null) ? invariant_1$1(false, 'We should always have pending or current props. This error is likely caused by a bug in React. Please file an issue.') : void 0;
        }
      } else if (nextCall === null || workInProgress.memoizedProps === nextCall) {
        nextCall = workInProgress.memoizedProps;
        // TODO: When bailing out, we might need to return the stateNode instead
        // of the child. To check it for work.
        // return bailoutOnAlreadyFinishedWork(current, workInProgress);
      }
  
      var nextChildren = nextCall.children;
  
      // The following is a fork of reconcileChildrenAtExpirationTime but using
      // stateNode to store the child.
      if (current === null) {
        workInProgress.stateNode = mountChildFibersInPlace(workInProgress, workInProgress.stateNode, nextChildren, renderExpirationTime);
      } else if (current.child === workInProgress.child) {
        workInProgress.stateNode = reconcileChildFibers(workInProgress, workInProgress.stateNode, nextChildren, renderExpirationTime);
      } else {
        workInProgress.stateNode = reconcileChildFibersInPlace(workInProgress, workInProgress.stateNode, nextChildren, renderExpirationTime);
      }
  
      memoizeProps(workInProgress, nextCall);
      // This doesn't take arbitrary time so we could synchronously just begin
      // eagerly do the work of workInProgress.child as an optimization.
      return workInProgress.stateNode;
    }
  
    function updatePortalComponent(current, workInProgress, renderExpirationTime) {
      pushHostContainer(workInProgress, workInProgress.stateNode.containerInfo);
      var nextChildren = workInProgress.pendingProps;
      if (hasContextChanged()) {
        // Normally we can bail out on props equality but if context has changed
        // we don't do the bailout and we have to reuse existing props instead.
        if (nextChildren === null) {
          nextChildren = current && current.memoizedProps;
          !(nextChildren != null) ? invariant_1$1(false, 'We should always have pending or current props. This error is likely caused by a bug in React. Please file an issue.') : void 0;
        }
      } else if (nextChildren === null || workInProgress.memoizedProps === nextChildren) {
        return bailoutOnAlreadyFinishedWork(current, workInProgress);
      }
  
      if (current === null) {
        // Portals are special because we don't append the children during mount
        // but at commit. Therefore we need to track insertions which the normal
        // flow doesn't do during mount. This doesn't happen at the root because
        // the root always starts with a "current" with a null child.
        // TODO: Consider unifying this with how the root works.
        workInProgress.child = reconcileChildFibersInPlace(workInProgress, workInProgress.child, nextChildren, renderExpirationTime);
        memoizeProps(workInProgress, nextChildren);
      } else {
        reconcileChildren(current, workInProgress, nextChildren);
        memoizeProps(workInProgress, nextChildren);
      }
      return workInProgress.child;
    }
  
    /*
    function reuseChildrenEffects(returnFiber : Fiber, firstChild : Fiber) {
      let child = firstChild;
      do {
        // Ensure that the first and last effect of the parent corresponds
        // to the children's first and last effect.
        if (!returnFiber.firstEffect) {
          returnFiber.firstEffect = child.firstEffect;
        }
        if (child.lastEffect) {
          if (returnFiber.lastEffect) {
            returnFiber.lastEffect.nextEffect = child.firstEffect;
          }
          returnFiber.lastEffect = child.lastEffect;
        }
      } while (child = child.sibling);
    }
    */
  
    function bailoutOnAlreadyFinishedWork(current, workInProgress) {
      cancelWorkTimer(workInProgress);
  
      // TODO: We should ideally be able to bail out early if the children have no
      // more work to do. However, since we don't have a separation of this
      // Fiber's priority and its children yet - we don't know without doing lots
      // of the same work we do anyway. Once we have that separation we can just
      // bail out here if the children has no more work at this priority level.
      // if (workInProgress.priorityOfChildren <= priorityLevel) {
      //   // If there are side-effects in these children that have not yet been
      //   // committed we need to ensure that they get properly transferred up.
      //   if (current && current.child !== workInProgress.child) {
      //     reuseChildrenEffects(workInProgress, child);
      //   }
      //   return null;
      // }
  
      cloneChildFibers(current, workInProgress);
      return workInProgress.child;
    }
  
    function bailoutOnLowPriority(current, workInProgress) {
      cancelWorkTimer(workInProgress);
  
      // TODO: Handle HostComponent tags here as well and call pushHostContext()?
      // See PR 8590 discussion for context
      switch (workInProgress.tag) {
        case HostRoot:
          pushHostRootContext(workInProgress);
          break;
        case ClassComponent:
          pushContextProvider(workInProgress);
          break;
        case HostPortal:
          pushHostContainer(workInProgress, workInProgress.stateNode.containerInfo);
          break;
      }
      // TODO: What if this is currently in progress?
      // How can that happen? How is this not being cloned?
      return null;
    }
  
    // TODO: Delete memoizeProps/State and move to reconcile/bailout instead
    function memoizeProps(workInProgress, nextProps) {
      workInProgress.memoizedProps = nextProps;
    }
  
    function memoizeState(workInProgress, nextState) {
      workInProgress.memoizedState = nextState;
      // Don't reset the updateQueue, in case there are pending updates. Resetting
      // is handled by processUpdateQueue.
    }
  
    function beginWork(current, workInProgress, renderExpirationTime) {
      if (workInProgress.expirationTime === NoWork || workInProgress.expirationTime > renderExpirationTime) {
        return bailoutOnLowPriority(current, workInProgress);
      }
  
      switch (workInProgress.tag) {
        case IndeterminateComponent:
          return mountIndeterminateComponent(current, workInProgress, renderExpirationTime);
        case FunctionalComponent:
          return updateFunctionalComponent(current, workInProgress);
        case ClassComponent:
          return updateClassComponent(current, workInProgress, renderExpirationTime);
        case HostRoot:
          return updateHostRoot(current, workInProgress, renderExpirationTime);
        case HostComponent:
          return updateHostComponent(current, workInProgress, renderExpirationTime);
        case HostText:
          return updateHostText(current, workInProgress);
        case CallHandlerPhase:
          // This is a restart. Reset the tag to the initial phase.
          workInProgress.tag = CallComponent;
        // Intentionally fall through since this is now the same.
        case CallComponent:
          return updateCallComponent(current, workInProgress, renderExpirationTime);
        case ReturnComponent:
          // A return component is just a placeholder, we can just run through the
          // next one immediately.
          return null;
        case HostPortal:
          return updatePortalComponent(current, workInProgress, renderExpirationTime);
        case Fragment:
          return updateFragment(current, workInProgress);
        default:
          invariant_1$1(false, 'Unknown unit of work tag. This error is likely caused by a bug in React. Please file an issue.');
      }
    }
  
    function beginFailedWork(current, workInProgress, renderExpirationTime) {
      // Push context providers here to avoid a push/pop context mismatch.
      switch (workInProgress.tag) {
        case ClassComponent:
          pushContextProvider(workInProgress);
          break;
        case HostRoot:
          pushHostRootContext(workInProgress);
          break;
        default:
          invariant_1$1(false, 'Invalid type of work. This error is likely caused by a bug in React. Please file an issue.');
      }
  
      // Add an error effect so we can handle the error during the commit phase
      workInProgress.effectTag |= Err;
  
      // This is a weird case where we do "resume" work — work that failed on
      // our first attempt. Because we no longer have a notion of "progressed
      // deletions," reset the child to the current child to make sure we delete
      // it again. TODO: Find a better way to handle this, perhaps during a more
      // general overhaul of error handling.
      if (current === null) {
        workInProgress.child = null;
      } else if (workInProgress.child !== current.child) {
        workInProgress.child = current.child;
      }
  
      if (workInProgress.expirationTime === NoWork || workInProgress.expirationTime > renderExpirationTime) {
        return bailoutOnLowPriority(current, workInProgress);
      }
  
      // If we don't bail out, we're going be recomputing our children so we need
      // to drop our effect list.
      workInProgress.firstEffect = null;
      workInProgress.lastEffect = null;
  
      // Unmount the current children as if the component rendered null
      var nextChildren = null;
      reconcileChildrenAtExpirationTime(current, workInProgress, nextChildren, renderExpirationTime);
  
      if (workInProgress.tag === ClassComponent) {
        var instance = workInProgress.stateNode;
        workInProgress.memoizedProps = instance.props;
        workInProgress.memoizedState = instance.state;
      }
  
      return workInProgress.child;
    }
  
    return {
      beginWork: beginWork,
      beginFailedWork: beginFailedWork
    };
  };
  
  var ReactFiberCompleteWork = function (config, hostContext, hydrationContext) {
    var createInstance = config.createInstance,
        createTextInstance = config.createTextInstance,
        appendInitialChild = config.appendInitialChild,
        finalizeInitialChildren = config.finalizeInitialChildren,
        prepareUpdate = config.prepareUpdate,
        mutation = config.mutation,
        persistence = config.persistence;
    var getRootHostContainer = hostContext.getRootHostContainer,
        popHostContext = hostContext.popHostContext,
        getHostContext = hostContext.getHostContext,
        popHostContainer = hostContext.popHostContainer;
    var prepareToHydrateHostInstance = hydrationContext.prepareToHydrateHostInstance,
        prepareToHydrateHostTextInstance = hydrationContext.prepareToHydrateHostTextInstance,
        popHydrationState = hydrationContext.popHydrationState;
  
  
    function markUpdate(workInProgress) {
      // Tag the fiber with an update effect. This turns a Placement into
      // an UpdateAndPlacement.
      workInProgress.effectTag |= Update;
    }
  
    function markRef(workInProgress) {
      workInProgress.effectTag |= Ref;
    }
  
    function appendAllReturns(returns, workInProgress) {
      var node = workInProgress.stateNode;
      if (node) {
        node['return'] = workInProgress;
      }
      while (node !== null) {
        if (node.tag === HostComponent || node.tag === HostText || node.tag === HostPortal) {
          invariant_1$1(false, 'A call cannot have host component children.');
        } else if (node.tag === ReturnComponent) {
          returns.push(node.type);
        } else if (node.child !== null) {
          node.child['return'] = node;
          node = node.child;
          continue;
        }
        while (node.sibling === null) {
          if (node['return'] === null || node['return'] === workInProgress) {
            return;
          }
          node = node['return'];
        }
        node.sibling['return'] = node['return'];
        node = node.sibling;
      }
    }
  
    function moveCallToHandlerPhase(current, workInProgress, renderExpirationTime) {
      var call = workInProgress.memoizedProps;
      !call ? invariant_1$1(false, 'Should be resolved by now. This error is likely caused by a bug in React. Please file an issue.') : void 0;
  
      // First step of the call has completed. Now we need to do the second.
      // TODO: It would be nice to have a multi stage call represented by a
      // single component, or at least tail call optimize nested ones. Currently
      // that requires additional fields that we don't want to add to the fiber.
      // So this requires nested handlers.
      // Note: This doesn't mutate the alternate node. I don't think it needs to
      // since this stage is reset for every pass.
      workInProgress.tag = CallHandlerPhase;
  
      // Build up the returns.
      // TODO: Compare this to a generator or opaque helpers like Children.
      var returns = [];
      appendAllReturns(returns, workInProgress);
      var fn = call.handler;
      var props = call.props;
      var nextChildren = fn(props, returns);
  
      var currentFirstChild = current !== null ? current.child : null;
      workInProgress.child = reconcileChildFibers(workInProgress, currentFirstChild, nextChildren, renderExpirationTime);
      return workInProgress.child;
    }
  
    function appendAllChildren(parent, workInProgress) {
      // We only have the top Fiber that was created but we need recurse down its
      // children to find all the terminal nodes.
      var node = workInProgress.child;
      while (node !== null) {
        if (node.tag === HostComponent || node.tag === HostText) {
          appendInitialChild(parent, node.stateNode);
        } else if (node.tag === HostPortal) {
          // If we have a portal child, then we don't want to traverse
          // down its children. Instead, we'll get insertions from each child in
          // the portal directly.
        } else if (node.child !== null) {
          node.child['return'] = node;
          node = node.child;
          continue;
        }
        if (node === workInProgress) {
          return;
        }
        while (node.sibling === null) {
          if (node['return'] === null || node['return'] === workInProgress) {
            return;
          }
          node = node['return'];
        }
        node.sibling['return'] = node['return'];
        node = node.sibling;
      }
    }
  
    var updateHostContainer = void 0;
    var updateHostComponent = void 0;
    var updateHostText = void 0;
    if (mutation) {
      if (enableMutatingReconciler) {
        // Mutation mode
        updateHostContainer = function (workInProgress) {
          // Noop
        };
        updateHostComponent = function (current, workInProgress, updatePayload, type, oldProps, newProps, rootContainerInstance) {
          // TODO: Type this specific to this type of component.
          workInProgress.updateQueue = updatePayload;
          // If the update payload indicates that there is a change or if there
          // is a new ref we mark this as an update. All the work is done in commitWork.
          if (updatePayload) {
            markUpdate(workInProgress);
          }
        };
        updateHostText = function (current, workInProgress, oldText, newText) {
          // If the text differs, mark it as an update. All the work in done in commitWork.
          if (oldText !== newText) {
            markUpdate(workInProgress);
          }
        };
      } else {
        invariant_1$1(false, 'Mutating reconciler is disabled.');
      }
    } else if (persistence) {
      if (enablePersistentReconciler) {
        // Persistent host tree mode
        var cloneInstance = persistence.cloneInstance,
            createContainerChildSet = persistence.createContainerChildSet,
            appendChildToContainerChildSet = persistence.appendChildToContainerChildSet,
            finalizeContainerChildren = persistence.finalizeContainerChildren;
  
        // An unfortunate fork of appendAllChildren because we have two different parent types.
  
        var appendAllChildrenToContainer = function (containerChildSet, workInProgress) {
          // We only have the top Fiber that was created but we need recurse down its
          // children to find all the terminal nodes.
          var node = workInProgress.child;
          while (node !== null) {
            if (node.tag === HostComponent || node.tag === HostText) {
              appendChildToContainerChildSet(containerChildSet, node.stateNode);
            } else if (node.tag === HostPortal) {
              // If we have a portal child, then we don't want to traverse
              // down its children. Instead, we'll get insertions from each child in
              // the portal directly.
            } else if (node.child !== null) {
              node.child['return'] = node;
              node = node.child;
              continue;
            }
            if (node === workInProgress) {
              return;
            }
            while (node.sibling === null) {
              if (node['return'] === null || node['return'] === workInProgress) {
                return;
              }
              node = node['return'];
            }
            node.sibling['return'] = node['return'];
            node = node.sibling;
          }
        };
        updateHostContainer = function (workInProgress) {
          var portalOrRoot = workInProgress.stateNode;
          var childrenUnchanged = workInProgress.firstEffect === null;
          if (childrenUnchanged) {
            // No changes, just reuse the existing instance.
          } else {
            var container = portalOrRoot.containerInfo;
            var newChildSet = createContainerChildSet(container);
            if (finalizeContainerChildren(container, newChildSet)) {
              markUpdate(workInProgress);
            }
            portalOrRoot.pendingChildren = newChildSet;
            // If children might have changed, we have to add them all to the set.
            appendAllChildrenToContainer(newChildSet, workInProgress);
            // Schedule an update on the container to swap out the container.
            markUpdate(workInProgress);
          }
        };
        updateHostComponent = function (current, workInProgress, updatePayload, type, oldProps, newProps, rootContainerInstance) {
          // If there are no effects associated with this node, then none of our children had any updates.
          // This guarantees that we can reuse all of them.
          var childrenUnchanged = workInProgress.firstEffect === null;
          var currentInstance = current.stateNode;
          if (childrenUnchanged && updatePayload === null) {
            // No changes, just reuse the existing instance.
            // Note that this might release a previous clone.
            workInProgress.stateNode = currentInstance;
          } else {
            var recyclableInstance = workInProgress.stateNode;
            var newInstance = cloneInstance(currentInstance, updatePayload, type, oldProps, newProps, workInProgress, childrenUnchanged, recyclableInstance);
            if (finalizeInitialChildren(newInstance, type, newProps, rootContainerInstance)) {
              markUpdate(workInProgress);
            }
            workInProgress.stateNode = newInstance;
            if (childrenUnchanged) {
              // If there are no other effects in this tree, we need to flag this node as having one.
              // Even though we're not going to use it for anything.
              // Otherwise parents won't know that there are new children to propagate upwards.
              markUpdate(workInProgress);
            } else {
              // If children might have changed, we have to add them all to the set.
              appendAllChildren(newInstance, workInProgress);
            }
          }
        };
        updateHostText = function (current, workInProgress, oldText, newText) {
          if (oldText !== newText) {
            // If the text content differs, we'll create a new text instance for it.
            var rootContainerInstance = getRootHostContainer();
            var currentHostContext = getHostContext();
            workInProgress.stateNode = createTextInstance(newText, rootContainerInstance, currentHostContext, workInProgress);
            // We'll have to mark it as having an effect, even though we won't use the effect for anything.
            // This lets the parents know that at least one of their children has changed.
            markUpdate(workInProgress);
          }
        };
      } else {
        invariant_1$1(false, 'Persistent reconciler is disabled.');
      }
    } else {
      if (enableNoopReconciler) {
        // No host operations
        updateHostContainer = function (workInProgress) {
          // Noop
        };
        updateHostComponent = function (current, workInProgress, updatePayload, type, oldProps, newProps, rootContainerInstance) {
          // Noop
        };
        updateHostText = function (current, workInProgress, oldText, newText) {
          // Noop
        };
      } else {
        invariant_1$1(false, 'Noop reconciler is disabled.');
      }
    }
  
    function completeWork(current, workInProgress, renderExpirationTime) {
      // Get the latest props.
      var newProps = workInProgress.pendingProps;
      if (newProps === null) {
        newProps = workInProgress.memoizedProps;
      } else if (workInProgress.expirationTime !== Never || renderExpirationTime === Never) {
        // Reset the pending props, unless this was a down-prioritization.
        workInProgress.pendingProps = null;
      }
  
      switch (workInProgress.tag) {
        case FunctionalComponent:
          return null;
        case ClassComponent:
          {
            // We are leaving this subtree, so pop context if any.
            popContextProvider(workInProgress);
            return null;
          }
        case HostRoot:
          {
            popHostContainer(workInProgress);
            popTopLevelContextObject(workInProgress);
            var fiberRoot = workInProgress.stateNode;
            if (fiberRoot.pendingContext) {
              fiberRoot.context = fiberRoot.pendingContext;
              fiberRoot.pendingContext = null;
            }
  
            if (current === null || current.child === null) {
              // If we hydrated, pop so that we can delete any remaining children
              // that weren't hydrated.
              popHydrationState(workInProgress);
              // This resets the hacky state to fix isMounted before committing.
              // TODO: Delete this when we delete isMounted and findDOMNode.
              workInProgress.effectTag &= ~Placement;
            }
            updateHostContainer(workInProgress);
            return null;
          }
        case HostComponent:
          {
            popHostContext(workInProgress);
            var rootContainerInstance = getRootHostContainer();
            var type = workInProgress.type;
            if (current !== null && workInProgress.stateNode != null) {
              // If we have an alternate, that means this is an update and we need to
              // schedule a side-effect to do the updates.
              var oldProps = current.memoizedProps;
              // If we get updated because one of our children updated, we don't
              // have newProps so we'll have to reuse them.
              // TODO: Split the update API as separate for the props vs. children.
              // Even better would be if children weren't special cased at all tho.
              var instance = workInProgress.stateNode;
              var currentHostContext = getHostContext();
              var updatePayload = prepareUpdate(instance, type, oldProps, newProps, rootContainerInstance, currentHostContext);
  
              updateHostComponent(current, workInProgress, updatePayload, type, oldProps, newProps, rootContainerInstance);
  
              if (current.ref !== workInProgress.ref) {
                markRef(workInProgress);
              }
            } else {
              if (!newProps) {
                !(workInProgress.stateNode !== null) ? invariant_1$1(false, 'We must have new props for new mounts. This error is likely caused by a bug in React. Please file an issue.') : void 0;
                // This can happen when we abort work.
                return null;
              }
  
              var _currentHostContext = getHostContext();
              // TODO: Move createInstance to beginWork and keep it on a context
              // "stack" as the parent. Then append children as we go in beginWork
              // or completeWork depending on we want to add then top->down or
              // bottom->up. Top->down is faster in IE11.
              var wasHydrated = popHydrationState(workInProgress);
              if (wasHydrated) {
                // TODO: Move this and createInstance step into the beginPhase
                // to consolidate.
                if (prepareToHydrateHostInstance(workInProgress, rootContainerInstance, _currentHostContext)) {
                  // If changes to the hydrated node needs to be applied at the
                  // commit-phase we mark this as such.
                  markUpdate(workInProgress);
                }
              } else {
                var _instance = createInstance(type, newProps, rootContainerInstance, _currentHostContext, workInProgress);
  
                appendAllChildren(_instance, workInProgress);
  
                // Certain renderers require commit-time effects for initial mount.
                // (eg DOM renderer supports auto-focus for certain elements).
                // Make sure such renderers get scheduled for later work.
                if (finalizeInitialChildren(_instance, type, newProps, rootContainerInstance)) {
                  markUpdate(workInProgress);
                }
                workInProgress.stateNode = _instance;
              }
  
              if (workInProgress.ref !== null) {
                // If there is a ref on a host node we need to schedule a callback
                markRef(workInProgress);
              }
            }
            return null;
          }
        case HostText:
          {
            var newText = newProps;
            if (current && workInProgress.stateNode != null) {
              var oldText = current.memoizedProps;
              // If we have an alternate, that means this is an update and we need
              // to schedule a side-effect to do the updates.
              updateHostText(current, workInProgress, oldText, newText);
            } else {
              if (typeof newText !== 'string') {
                !(workInProgress.stateNode !== null) ? invariant_1$1(false, 'We must have new props for new mounts. This error is likely caused by a bug in React. Please file an issue.') : void 0;
                // This can happen when we abort work.
                return null;
              }
              var _rootContainerInstance = getRootHostContainer();
              var _currentHostContext2 = getHostContext();
              var _wasHydrated = popHydrationState(workInProgress);
              if (_wasHydrated) {
                if (prepareToHydrateHostTextInstance(workInProgress)) {
                  markUpdate(workInProgress);
                }
              } else {
                workInProgress.stateNode = createTextInstance(newText, _rootContainerInstance, _currentHostContext2, workInProgress);
              }
            }
            return null;
          }
        case CallComponent:
          return moveCallToHandlerPhase(current, workInProgress, renderExpirationTime);
        case CallHandlerPhase:
          // Reset the tag to now be a first phase call.
          workInProgress.tag = CallComponent;
          return null;
        case ReturnComponent:
          // Does nothing.
          return null;
        case Fragment:
          return null;
        case HostPortal:
          popHostContainer(workInProgress);
          updateHostContainer(workInProgress);
          return null;
        // Error cases
        case IndeterminateComponent:
          invariant_1$1(false, 'An indeterminate component should have become determinate before completing. This error is likely caused by a bug in React. Please file an issue.');
        // eslint-disable-next-line no-fallthrough
        default:
          invariant_1$1(false, 'Unknown unit of work tag. This error is likely caused by a bug in React. Please file an issue.');
      }
    }
  
    return {
      completeWork: completeWork
    };
  };
  
  var invokeGuardedCallback$2 = ReactErrorUtils.invokeGuardedCallback;
  var hasCaughtError$1 = ReactErrorUtils.hasCaughtError;
  var clearCaughtError$1 = ReactErrorUtils.clearCaughtError;
  
  
  var ReactFiberCommitWork = function (config, captureError) {
    var getPublicInstance = config.getPublicInstance,
        mutation = config.mutation,
        persistence = config.persistence;
  
  
    var callComponentWillUnmountWithTimer = function (current, instance) {
      startPhaseTimer(current, 'componentWillUnmount');
      instance.props = current.memoizedProps;
      instance.state = current.memoizedState;
      instance.componentWillUnmount();
      stopPhaseTimer();
    };
  
    // Capture errors so they don't interrupt unmounting.
    function safelyCallComponentWillUnmount(current, instance) {
      {
        invokeGuardedCallback$2(null, callComponentWillUnmountWithTimer, null, current, instance);
        if (hasCaughtError$1()) {
          var unmountError = clearCaughtError$1();
          captureError(current, unmountError);
        }
      }
    }
  
    function safelyDetachRef(current) {
      var ref = current.ref;
      if (ref !== null) {
        {
          invokeGuardedCallback$2(null, ref, null, null);
          if (hasCaughtError$1()) {
            var refError = clearCaughtError$1();
            captureError(current, refError);
          }
        }
      }
    }
  
    function commitLifeCycles(current, finishedWork) {
      switch (finishedWork.tag) {
        case ClassComponent:
          {
            var instance = finishedWork.stateNode;
            if (finishedWork.effectTag & Update) {
              if (current === null) {
                startPhaseTimer(finishedWork, 'componentDidMount');
                instance.props = finishedWork.memoizedProps;
                instance.state = finishedWork.memoizedState;
                instance.componentDidMount();
                stopPhaseTimer();
              } else {
                var prevProps = current.memoizedProps;
                var prevState = current.memoizedState;
                startPhaseTimer(finishedWork, 'componentDidUpdate');
                instance.props = finishedWork.memoizedProps;
                instance.state = finishedWork.memoizedState;
                instance.componentDidUpdate(prevProps, prevState);
                stopPhaseTimer();
              }
            }
            var updateQueue = finishedWork.updateQueue;
            if (updateQueue !== null) {
              commitCallbacks(updateQueue, instance);
            }
            return;
          }
        case HostRoot:
          {
            var _updateQueue = finishedWork.updateQueue;
            if (_updateQueue !== null) {
              var _instance = finishedWork.child !== null ? finishedWork.child.stateNode : null;
              commitCallbacks(_updateQueue, _instance);
            }
            return;
          }
        case HostComponent:
          {
            var _instance2 = finishedWork.stateNode;
  
            // Renderers may schedule work to be done after host components are mounted
            // (eg DOM renderer may schedule auto-focus for inputs and form controls).
            // These effects should only be committed when components are first mounted,
            // aka when there is no current/alternate.
            if (current === null && finishedWork.effectTag & Update) {
              var type = finishedWork.type;
              var props = finishedWork.memoizedProps;
              commitMount(_instance2, type, props, finishedWork);
            }
  
            return;
          }
        case HostText:
          {
            // We have no life-cycles associated with text.
            return;
          }
        case HostPortal:
          {
            // We have no life-cycles associated with portals.
            return;
          }
        default:
          {
            invariant_1$1(false, 'This unit of work tag should not have side-effects. This error is likely caused by a bug in React. Please file an issue.');
          }
      }
    }
  
    function commitAttachRef(finishedWork) {
      var ref = finishedWork.ref;
      if (ref !== null) {
        var instance = finishedWork.stateNode;
        switch (finishedWork.tag) {
          case HostComponent:
            ref(getPublicInstance(instance));
            break;
          default:
            ref(instance);
        }
      }
    }
  
    function commitDetachRef(current) {
      var currentRef = current.ref;
      if (currentRef !== null) {
        currentRef(null);
      }
    }
  
    // User-originating errors (lifecycles and refs) should not interrupt
    // deletion, so don't let them throw. Host-originating errors should
    // interrupt deletion, so it's okay
    function commitUnmount(current) {
      if (typeof onCommitUnmount === 'function') {
        onCommitUnmount(current);
      }
  
      switch (current.tag) {
        case ClassComponent:
          {
            safelyDetachRef(current);
            var instance = current.stateNode;
            if (typeof instance.componentWillUnmount === 'function') {
              safelyCallComponentWillUnmount(current, instance);
            }
            return;
          }
        case HostComponent:
          {
            safelyDetachRef(current);
            return;
          }
        case CallComponent:
          {
            commitNestedUnmounts(current.stateNode);
            return;
          }
        case HostPortal:
          {
            // TODO: this is recursive.
            // We are also not using this parent because
            // the portal will get pushed immediately.
            if (enableMutatingReconciler && mutation) {
              unmountHostComponents(current);
            } else if (enablePersistentReconciler && persistence) {
              emptyPortalContainer(current);
            }
            return;
          }
      }
    }
  
    function commitNestedUnmounts(root) {
      // While we're inside a removed host node we don't want to call
      // removeChild on the inner nodes because they're removed by the top
      // call anyway. We also want to call componentWillUnmount on all
      // composites before this host node is removed from the tree. Therefore
      var node = root;
      while (true) {
        commitUnmount(node);
        // Visit children because they may contain more composite or host nodes.
        // Skip portals because commitUnmount() currently visits them recursively.
        if (node.child !== null && (
        // If we use mutation we drill down into portals using commitUnmount above.
        // If we don't use mutation we drill down into portals here instead.
        !mutation || node.tag !== HostPortal)) {
          node.child['return'] = node;
          node = node.child;
          continue;
        }
        if (node === root) {
          return;
        }
        while (node.sibling === null) {
          if (node['return'] === null || node['return'] === root) {
            return;
          }
          node = node['return'];
        }
        node.sibling['return'] = node['return'];
        node = node.sibling;
      }
    }
  
    function detachFiber(current) {
      // Cut off the return pointers to disconnect it from the tree. Ideally, we
      // should clear the child pointer of the parent alternate to let this
      // get GC:ed but we don't know which for sure which parent is the current
      // one so we'll settle for GC:ing the subtree of this child. This child
      // itself will be GC:ed when the parent updates the next time.
      current['return'] = null;
      current.child = null;
      if (current.alternate) {
        current.alternate.child = null;
        current.alternate['return'] = null;
      }
    }
  
    if (!mutation) {
      var commitContainer = void 0;
      if (persistence) {
        var replaceContainerChildren = persistence.replaceContainerChildren,
            createContainerChildSet = persistence.createContainerChildSet;
  
        var emptyPortalContainer = function (current) {
          var portal = current.stateNode;
          var containerInfo = portal.containerInfo;
  
          var emptyChildSet = createContainerChildSet(containerInfo);
          replaceContainerChildren(containerInfo, emptyChildSet);
        };
        commitContainer = function (finishedWork) {
          switch (finishedWork.tag) {
            case ClassComponent:
              {
                return;
              }
            case HostComponent:
              {
                return;
              }
            case HostText:
              {
                return;
              }
            case HostRoot:
            case HostPortal:
              {
                var portalOrRoot = finishedWork.stateNode;
                var containerInfo = portalOrRoot.containerInfo,
                    _pendingChildren = portalOrRoot.pendingChildren;
  
                replaceContainerChildren(containerInfo, _pendingChildren);
                return;
              }
            default:
              {
                invariant_1$1(false, 'This unit of work tag should not have side-effects. This error is likely caused by a bug in React. Please file an issue.');
              }
          }
        };
      } else {
        commitContainer = function (finishedWork) {
          // Noop
        };
      }
      if (enablePersistentReconciler || enableNoopReconciler) {
        return {
          commitResetTextContent: function (finishedWork) {},
          commitPlacement: function (finishedWork) {},
          commitDeletion: function (current) {
            // Detach refs and call componentWillUnmount() on the whole subtree.
            commitNestedUnmounts(current);
            detachFiber(current);
          },
          commitWork: function (current, finishedWork) {
            commitContainer(finishedWork);
          },
  
          commitLifeCycles: commitLifeCycles,
          commitAttachRef: commitAttachRef,
          commitDetachRef: commitDetachRef
        };
      } else if (persistence) {
        invariant_1$1(false, 'Persistent reconciler is disabled.');
      } else {
        invariant_1$1(false, 'Noop reconciler is disabled.');
      }
    }
    var commitMount = mutation.commitMount,
        commitUpdate = mutation.commitUpdate,
        resetTextContent = mutation.resetTextContent,
        commitTextUpdate = mutation.commitTextUpdate,
        appendChild = mutation.appendChild,
        appendChildToContainer = mutation.appendChildToContainer,
        insertBefore = mutation.insertBefore,
        insertInContainerBefore = mutation.insertInContainerBefore,
        removeChild = mutation.removeChild,
        removeChildFromContainer = mutation.removeChildFromContainer;
  
  
    function getHostParentFiber(fiber) {
      var parent = fiber['return'];
      while (parent !== null) {
        if (isHostParent(parent)) {
          return parent;
        }
        parent = parent['return'];
      }
      invariant_1$1(false, 'Expected to find a host parent. This error is likely caused by a bug in React. Please file an issue.');
    }
  
    function isHostParent(fiber) {
      return fiber.tag === HostComponent || fiber.tag === HostRoot || fiber.tag === HostPortal;
    }
  
    function getHostSibling(fiber) {
      // We're going to search forward into the tree until we find a sibling host
      // node. Unfortunately, if multiple insertions are done in a row we have to
      // search past them. This leads to exponential search for the next sibling.
      var node = fiber;
      siblings: while (true) {
        // If we didn't find anything, let's try the next sibling.
        while (node.sibling === null) {
          if (node['return'] === null || isHostParent(node['return'])) {
            // If we pop out of the root or hit the parent the fiber we are the
            // last sibling.
            return null;
          }
          node = node['return'];
        }
        node.sibling['return'] = node['return'];
        node = node.sibling;
        while (node.tag !== HostComponent && node.tag !== HostText) {
          // If it is not host node and, we might have a host node inside it.
          // Try to search down until we find one.
          if (node.effectTag & Placement) {
            // If we don't have a child, try the siblings instead.
            continue siblings;
          }
          // If we don't have a child, try the siblings instead.
          // We also skip portals because they are not part of this host tree.
          if (node.child === null || node.tag === HostPortal) {
            continue siblings;
          } else {
            node.child['return'] = node;
            node = node.child;
          }
        }
        // Check if this host node is stable or about to be placed.
        if (!(node.effectTag & Placement)) {
          // Found it!
          return node.stateNode;
        }
      }
    }
  
    function commitPlacement(finishedWork) {
      // Recursively insert all host nodes into the parent.
      var parentFiber = getHostParentFiber(finishedWork);
      var parent = void 0;
      var isContainer = void 0;
      switch (parentFiber.tag) {
        case HostComponent:
          parent = parentFiber.stateNode;
          isContainer = false;
          break;
        case HostRoot:
          parent = parentFiber.stateNode.containerInfo;
          isContainer = true;
          break;
        case HostPortal:
          parent = parentFiber.stateNode.containerInfo;
          isContainer = true;
          break;
        default:
          invariant_1$1(false, 'Invalid host parent fiber. This error is likely caused by a bug in React. Please file an issue.');
      }
      if (parentFiber.effectTag & ContentReset) {
        // Reset the text content of the parent before doing any insertions
        resetTextContent(parent);
        // Clear ContentReset from the effect tag
        parentFiber.effectTag &= ~ContentReset;
      }
  
      var before = getHostSibling(finishedWork);
      // We only have the top Fiber that was inserted but we need recurse down its
      // children to find all the terminal nodes.
      var node = finishedWork;
      while (true) {
        if (node.tag === HostComponent || node.tag === HostText) {
          if (before) {
            if (isContainer) {
              insertInContainerBefore(parent, node.stateNode, before);
            } else {
              insertBefore(parent, node.stateNode, before);
            }
          } else {
            if (isContainer) {
              appendChildToContainer(parent, node.stateNode);
            } else {
              appendChild(parent, node.stateNode);
            }
          }
        } else if (node.tag === HostPortal) {
          // If the insertion itself is a portal, then we don't want to traverse
          // down its children. Instead, we'll get insertions from each child in
          // the portal directly.
        } else if (node.child !== null) {
          node.child['return'] = node;
          node = node.child;
          continue;
        }
        if (node === finishedWork) {
          return;
        }
        while (node.sibling === null) {
          if (node['return'] === null || node['return'] === finishedWork) {
            return;
          }
          node = node['return'];
        }
        node.sibling['return'] = node['return'];
        node = node.sibling;
      }
    }
  
    function unmountHostComponents(current) {
      // We only have the top Fiber that was inserted but we need recurse down its
      var node = current;
  
      // Each iteration, currentParent is populated with node's host parent if not
      // currentParentIsValid.
      var currentParentIsValid = false;
      var currentParent = void 0;
      var currentParentIsContainer = void 0;
  
      while (true) {
        if (!currentParentIsValid) {
          var parent = node['return'];
          findParent: while (true) {
            !(parent !== null) ? invariant_1$1(false, 'Expected to find a host parent. This error is likely caused by a bug in React. Please file an issue.') : void 0;
            switch (parent.tag) {
              case HostComponent:
                currentParent = parent.stateNode;
                currentParentIsContainer = false;
                break findParent;
              case HostRoot:
                currentParent = parent.stateNode.containerInfo;
                currentParentIsContainer = true;
                break findParent;
              case HostPortal:
                currentParent = parent.stateNode.containerInfo;
                currentParentIsContainer = true;
                break findParent;
            }
            parent = parent['return'];
          }
          currentParentIsValid = true;
        }
  
        if (node.tag === HostComponent || node.tag === HostText) {
          commitNestedUnmounts(node);
          // After all the children have unmounted, it is now safe to remove the
          // node from the tree.
          if (currentParentIsContainer) {
            removeChildFromContainer(currentParent, node.stateNode);
          } else {
            removeChild(currentParent, node.stateNode);
          }
          // Don't visit children because we already visited them.
        } else if (node.tag === HostPortal) {
          // When we go into a portal, it becomes the parent to remove from.
          // We will reassign it back when we pop the portal on the way up.
          currentParent = node.stateNode.containerInfo;
          // Visit children because portals might contain host components.
          if (node.child !== null) {
            node.child['return'] = node;
            node = node.child;
            continue;
          }
        } else {
          commitUnmount(node);
          // Visit children because we may find more host components below.
          if (node.child !== null) {
            node.child['return'] = node;
            node = node.child;
            continue;
          }
        }
        if (node === current) {
          return;
        }
        while (node.sibling === null) {
          if (node['return'] === null || node['return'] === current) {
            return;
          }
          node = node['return'];
          if (node.tag === HostPortal) {
            // When we go out of the portal, we need to restore the parent.
            // Since we don't keep a stack of them, we will search for it.
            currentParentIsValid = false;
          }
        }
        node.sibling['return'] = node['return'];
        node = node.sibling;
      }
    }
  
    function commitDeletion(current) {
      // Recursively delete all host nodes from the parent.
      // Detach refs and call componentWillUnmount() on the whole subtree.
      unmountHostComponents(current);
      detachFiber(current);
    }
  
    function commitWork(current, finishedWork) {
      switch (finishedWork.tag) {
        case ClassComponent:
          {
            return;
          }
        case HostComponent:
          {
            var instance = finishedWork.stateNode;
            if (instance != null) {
              // Commit the work prepared earlier.
              var newProps = finishedWork.memoizedProps;
              // For hydration we reuse the update path but we treat the oldProps
              // as the newProps. The updatePayload will contain the real change in
              // this case.
              var oldProps = current !== null ? current.memoizedProps : newProps;
              var type = finishedWork.type;
              // TODO: Type the updateQueue to be specific to host components.
              var updatePayload = finishedWork.updateQueue;
              finishedWork.updateQueue = null;
              if (updatePayload !== null) {
                commitUpdate(instance, updatePayload, type, oldProps, newProps, finishedWork);
              }
            }
            return;
          }
        case HostText:
          {
            !(finishedWork.stateNode !== null) ? invariant_1$1(false, 'This should have a text node initialized. This error is likely caused by a bug in React. Please file an issue.') : void 0;
            var textInstance = finishedWork.stateNode;
            var newText = finishedWork.memoizedProps;
            // For hydration we reuse the update path but we treat the oldProps
            // as the newProps. The updatePayload will contain the real change in
            // this case.
            var oldText = current !== null ? current.memoizedProps : newText;
            commitTextUpdate(textInstance, oldText, newText);
            return;
          }
        case HostRoot:
          {
            return;
          }
        default:
          {
            invariant_1$1(false, 'This unit of work tag should not have side-effects. This error is likely caused by a bug in React. Please file an issue.');
          }
      }
    }
  
    function commitResetTextContent(current) {
      resetTextContent(current.stateNode);
    }
  
    if (enableMutatingReconciler) {
      return {
        commitResetTextContent: commitResetTextContent,
        commitPlacement: commitPlacement,
        commitDeletion: commitDeletion,
        commitWork: commitWork,
        commitLifeCycles: commitLifeCycles,
        commitAttachRef: commitAttachRef,
        commitDetachRef: commitDetachRef
      };
    } else {
      invariant_1$1(false, 'Mutating reconciler is disabled.');
    }
  };
  
  var NO_CONTEXT = {};
  
  var ReactFiberHostContext = function (config) {
    var getChildHostContext = config.getChildHostContext,
        getRootHostContext = config.getRootHostContext;
  
  
    var contextStackCursor = createCursor(NO_CONTEXT);
    var contextFiberStackCursor = createCursor(NO_CONTEXT);
    var rootInstanceStackCursor = createCursor(NO_CONTEXT);
  
    function requiredContext(c) {
      !(c !== NO_CONTEXT) ? invariant_1$1(false, 'Expected host context to exist. This error is likely caused by a bug in React. Please file an issue.') : void 0;
      return c;
    }
  
    function getRootHostContainer() {
      var rootInstance = requiredContext(rootInstanceStackCursor.current);
      return rootInstance;
    }
  
    function pushHostContainer(fiber, nextRootInstance) {
      // Push current root instance onto the stack;
      // This allows us to reset root when portals are popped.
      push(rootInstanceStackCursor, nextRootInstance, fiber);
  
      var nextRootContext = getRootHostContext(nextRootInstance);
  
      // Track the context and the Fiber that provided it.
      // This enables us to pop only Fibers that provide unique contexts.
      push(contextFiberStackCursor, fiber, fiber);
      push(contextStackCursor, nextRootContext, fiber);
    }
  
    function popHostContainer(fiber) {
      pop(contextStackCursor, fiber);
      pop(contextFiberStackCursor, fiber);
      pop(rootInstanceStackCursor, fiber);
    }
  
    function getHostContext() {
      var context = requiredContext(contextStackCursor.current);
      return context;
    }
  
    function pushHostContext(fiber) {
      var rootInstance = requiredContext(rootInstanceStackCursor.current);
      var context = requiredContext(contextStackCursor.current);
      var nextContext = getChildHostContext(context, fiber.type, rootInstance);
  
      // Don't push this Fiber's context unless it's unique.
      if (context === nextContext) {
        return;
      }
  
      // Track the context and the Fiber that provided it.
      // This enables us to pop only Fibers that provide unique contexts.
      push(contextFiberStackCursor, fiber, fiber);
      push(contextStackCursor, nextContext, fiber);
    }
  
    function popHostContext(fiber) {
      // Do not pop unless this Fiber provided the current context.
      // pushHostContext() only pushes Fibers that provide unique contexts.
      if (contextFiberStackCursor.current !== fiber) {
        return;
      }
  
      pop(contextStackCursor, fiber);
      pop(contextFiberStackCursor, fiber);
    }
  
    function resetHostContainer() {
      contextStackCursor.current = NO_CONTEXT;
      rootInstanceStackCursor.current = NO_CONTEXT;
    }
  
    return {
      getHostContext: getHostContext,
      getRootHostContainer: getRootHostContainer,
      popHostContainer: popHostContainer,
      popHostContext: popHostContext,
      pushHostContainer: pushHostContainer,
      pushHostContext: pushHostContext,
      resetHostContainer: resetHostContainer
    };
  };
  
  var ReactFiberHydrationContext = function (config) {
    var shouldSetTextContent = config.shouldSetTextContent,
        hydration = config.hydration;
  
    // If this doesn't have hydration mode.
  
    if (!hydration) {
      return {
        enterHydrationState: function () {
          return false;
        },
        resetHydrationState: function () {},
        tryToClaimNextHydratableInstance: function () {},
        prepareToHydrateHostInstance: function () {
          invariant_1$1(false, 'Expected prepareToHydrateHostInstance() to never be called. This error is likely caused by a bug in React. Please file an issue.');
        },
        prepareToHydrateHostTextInstance: function () {
          invariant_1$1(false, 'Expected prepareToHydrateHostTextInstance() to never be called. This error is likely caused by a bug in React. Please file an issue.');
        },
        popHydrationState: function (fiber) {
          return false;
        }
      };
    }
  
    var canHydrateInstance = hydration.canHydrateInstance,
        canHydrateTextInstance = hydration.canHydrateTextInstance,
        getNextHydratableSibling = hydration.getNextHydratableSibling,
        getFirstHydratableChild = hydration.getFirstHydratableChild,
        hydrateInstance = hydration.hydrateInstance,
        hydrateTextInstance = hydration.hydrateTextInstance,
        didNotMatchHydratedContainerTextInstance = hydration.didNotMatchHydratedContainerTextInstance,
        didNotMatchHydratedTextInstance = hydration.didNotMatchHydratedTextInstance,
        didNotHydrateContainerInstance = hydration.didNotHydrateContainerInstance,
        didNotHydrateInstance = hydration.didNotHydrateInstance,
        didNotFindHydratableContainerInstance = hydration.didNotFindHydratableContainerInstance,
        didNotFindHydratableContainerTextInstance = hydration.didNotFindHydratableContainerTextInstance,
        didNotFindHydratableInstance = hydration.didNotFindHydratableInstance,
        didNotFindHydratableTextInstance = hydration.didNotFindHydratableTextInstance;
  
    // The deepest Fiber on the stack involved in a hydration context.
    // This may have been an insertion or a hydration.
  
    var hydrationParentFiber = null;
    var nextHydratableInstance = null;
    var isHydrating = false;
  
    function enterHydrationState(fiber) {
      var parentInstance = fiber.stateNode.containerInfo;
      nextHydratableInstance = getFirstHydratableChild(parentInstance);
      hydrationParentFiber = fiber;
      isHydrating = true;
      return true;
    }
  
    function deleteHydratableInstance(returnFiber, instance) {
      {
        switch (returnFiber.tag) {
          case HostRoot:
            didNotHydrateContainerInstance(returnFiber.stateNode.containerInfo, instance);
            break;
          case HostComponent:
            didNotHydrateInstance(returnFiber.type, returnFiber.memoizedProps, returnFiber.stateNode, instance);
            break;
        }
      }
  
      var childToDelete = createFiberFromHostInstanceForDeletion();
      childToDelete.stateNode = instance;
      childToDelete['return'] = returnFiber;
      childToDelete.effectTag = Deletion;
  
      // This might seem like it belongs on progressedFirstDeletion. However,
      // these children are not part of the reconciliation list of children.
      // Even if we abort and rereconcile the children, that will try to hydrate
      // again and the nodes are still in the host tree so these will be
      // recreated.
      if (returnFiber.lastEffect !== null) {
        returnFiber.lastEffect.nextEffect = childToDelete;
        returnFiber.lastEffect = childToDelete;
      } else {
        returnFiber.firstEffect = returnFiber.lastEffect = childToDelete;
      }
    }
  
    function insertNonHydratedInstance(returnFiber, fiber) {
      fiber.effectTag |= Placement;
      {
        switch (returnFiber.tag) {
          case HostRoot:
            {
              var parentContainer = returnFiber.stateNode.containerInfo;
              switch (fiber.tag) {
                case HostComponent:
                  var type = fiber.type;
                  var props = fiber.pendingProps;
                  didNotFindHydratableContainerInstance(parentContainer, type, props);
                  break;
                case HostText:
                  var text = fiber.pendingProps;
                  didNotFindHydratableContainerTextInstance(parentContainer, text);
                  break;
              }
              break;
            }
          case HostComponent:
            {
              var parentType = returnFiber.type;
              var parentProps = returnFiber.memoizedProps;
              var parentInstance = returnFiber.stateNode;
              switch (fiber.tag) {
                case HostComponent:
                  var _type = fiber.type;
                  var _props = fiber.pendingProps;
                  didNotFindHydratableInstance(parentType, parentProps, parentInstance, _type, _props);
                  break;
                case HostText:
                  var _text = fiber.pendingProps;
                  didNotFindHydratableTextInstance(parentType, parentProps, parentInstance, _text);
                  break;
              }
              break;
            }
          default:
            return;
        }
      }
    }
  
    function tryHydrate(fiber, nextInstance) {
      switch (fiber.tag) {
        case HostComponent:
          {
            var type = fiber.type;
            var props = fiber.pendingProps;
            var instance = canHydrateInstance(nextInstance, type, props);
            if (instance !== null) {
              fiber.stateNode = instance;
              return true;
            }
            return false;
          }
        case HostText:
          {
            var text = fiber.pendingProps;
            var textInstance = canHydrateTextInstance(nextInstance, text);
            if (textInstance !== null) {
              fiber.stateNode = textInstance;
              return true;
            }
            return false;
          }
        default:
          return false;
      }
    }
  
    function tryToClaimNextHydratableInstance(fiber) {
      if (!isHydrating) {
        return;
      }
      var nextInstance = nextHydratableInstance;
      if (!nextInstance) {
        // Nothing to hydrate. Make it an insertion.
        insertNonHydratedInstance(hydrationParentFiber, fiber);
        isHydrating = false;
        hydrationParentFiber = fiber;
        return;
      }
      if (!tryHydrate(fiber, nextInstance)) {
        // If we can't hydrate this instance let's try the next one.
        // We use this as a heuristic. It's based on intuition and not data so it
        // might be flawed or unnecessary.
        nextInstance = getNextHydratableSibling(nextInstance);
        if (!nextInstance || !tryHydrate(fiber, nextInstance)) {
          // Nothing to hydrate. Make it an insertion.
          insertNonHydratedInstance(hydrationParentFiber, fiber);
          isHydrating = false;
          hydrationParentFiber = fiber;
          return;
        }
        // We matched the next one, we'll now assume that the first one was
        // superfluous and we'll delete it. Since we can't eagerly delete it
        // we'll have to schedule a deletion. To do that, this node needs a dummy
        // fiber associated with it.
        deleteHydratableInstance(hydrationParentFiber, nextHydratableInstance);
      }
      hydrationParentFiber = fiber;
      nextHydratableInstance = getFirstHydratableChild(nextInstance);
    }
  
    function prepareToHydrateHostInstance(fiber, rootContainerInstance, hostContext) {
      var instance = fiber.stateNode;
      var updatePayload = hydrateInstance(instance, fiber.type, fiber.memoizedProps, rootContainerInstance, hostContext, fiber);
      // TODO: Type this specific to this type of component.
      fiber.updateQueue = updatePayload;
      // If the update payload indicates that there is a change or if there
      // is a new ref we mark this as an update.
      if (updatePayload !== null) {
        return true;
      }
      return false;
    }
  
    function prepareToHydrateHostTextInstance(fiber) {
      var textInstance = fiber.stateNode;
      var textContent = fiber.memoizedProps;
      var shouldUpdate = hydrateTextInstance(textInstance, textContent, fiber);
      {
        if (shouldUpdate) {
          // We assume that prepareToHydrateHostTextInstance is called in a context where the
          // hydration parent is the parent host component of this host text.
          var returnFiber = hydrationParentFiber;
          if (returnFiber !== null) {
            switch (returnFiber.tag) {
              case HostRoot:
                {
                  var parentContainer = returnFiber.stateNode.containerInfo;
                  didNotMatchHydratedContainerTextInstance(parentContainer, textInstance, textContent);
                  break;
                }
              case HostComponent:
                {
                  var parentType = returnFiber.type;
                  var parentProps = returnFiber.memoizedProps;
                  var parentInstance = returnFiber.stateNode;
                  didNotMatchHydratedTextInstance(parentType, parentProps, parentInstance, textInstance, textContent);
                  break;
                }
            }
          }
        }
      }
      return shouldUpdate;
    }
  
    function popToNextHostParent(fiber) {
      var parent = fiber['return'];
      while (parent !== null && parent.tag !== HostComponent && parent.tag !== HostRoot) {
        parent = parent['return'];
      }
      hydrationParentFiber = parent;
    }
  
    function popHydrationState(fiber) {
      if (fiber !== hydrationParentFiber) {
        // We're deeper than the current hydration context, inside an inserted
        // tree.
        return false;
      }
      if (!isHydrating) {
        // If we're not currently hydrating but we're in a hydration context, then
        // we were an insertion and now need to pop up reenter hydration of our
        // siblings.
        popToNextHostParent(fiber);
        isHydrating = true;
        return false;
      }
  
      var type = fiber.type;
  
      // If we have any remaining hydratable nodes, we need to delete them now.
      // We only do this deeper than head and body since they tend to have random
      // other nodes in them. We also ignore components with pure text content in
      // side of them.
      // TODO: Better heuristic.
      if (fiber.tag !== HostComponent || type !== 'head' && type !== 'body' && !shouldSetTextContent(type, fiber.memoizedProps)) {
        var nextInstance = nextHydratableInstance;
        while (nextInstance) {
          deleteHydratableInstance(fiber, nextInstance);
          nextInstance = getNextHydratableSibling(nextInstance);
        }
      }
  
      popToNextHostParent(fiber);
      nextHydratableInstance = hydrationParentFiber ? getNextHydratableSibling(fiber.stateNode) : null;
      return true;
    }
  
    function resetHydrationState() {
      hydrationParentFiber = null;
      nextHydratableInstance = null;
      isHydrating = false;
    }
  
    return {
      enterHydrationState: enterHydrationState,
      resetHydrationState: resetHydrationState,
      tryToClaimNextHydratableInstance: tryToClaimNextHydratableInstance,
      prepareToHydrateHostInstance: prepareToHydrateHostInstance,
      prepareToHydrateHostTextInstance: prepareToHydrateHostTextInstance,
      popHydrationState: popHydrationState
    };
  };
  
  // This lets us hook into Fiber to debug what it's doing.
  // See https://github.com/facebook/react/pull/8033.
  // This is not part of the public API, not even for React DevTools.
  // You may only inject a debugTool if you work on React Fiber itself.
  var ReactFiberInstrumentation = {
    debugTool: null
  };
  
  var ReactFiberInstrumentation_1 = ReactFiberInstrumentation;
  
  var defaultShowDialog = function (capturedError) {
    return true;
  };
  
  var showDialog = defaultShowDialog;
  
  function logCapturedError(capturedError) {
    var logError = showDialog(capturedError);
  
    // Allow injected showDialog() to prevent default console.error logging.
    // This enables renderers like ReactNative to better manage redbox behavior.
    if (logError === false) {
      return;
    }
  
    {
      var componentName = capturedError.componentName,
          componentStack = capturedError.componentStack,
          errorBoundaryName = capturedError.errorBoundaryName,
          errorBoundaryFound = capturedError.errorBoundaryFound,
          willRetry = capturedError.willRetry;
  
  
      var componentNameMessage = componentName ? 'The above error occurred in the <' + componentName + '> component:' : 'The above error occurred in one of your React components:';
  
      var errorBoundaryMessage = void 0;
      // errorBoundaryFound check is sufficient; errorBoundaryName check is to satisfy Flow.
      if (errorBoundaryFound && errorBoundaryName) {
        if (willRetry) {
          errorBoundaryMessage = 'React will try to recreate this component tree from scratch ' + ('using the error boundary you provided, ' + errorBoundaryName + '.');
        } else {
          errorBoundaryMessage = 'This error was initially handled by the error boundary ' + errorBoundaryName + '.\n' + 'Recreating the tree from scratch failed so React will unmount the tree.';
        }
      } else {
        errorBoundaryMessage = 'Consider adding an error boundary to your tree to customize error handling behavior.\n' + 'Visit https://fb.me/react-error-boundaries to learn more about error boundaries.';
      }
      var combinedMessage = '' + componentNameMessage + componentStack + '\n\n' + ('' + errorBoundaryMessage);
  
      // In development, we provide our own message with just the component stack.
      // We don't include the original error message and JS stack because the browser
      // has already printed it. Even if the application swallows the error, it is still
      // displayed by the browser thanks to the DEV-only fake event trick in ReactErrorUtils.
      console.error(combinedMessage);
    }
  }
  
  var invokeGuardedCallback$1 = ReactErrorUtils.invokeGuardedCallback;
  var hasCaughtError = ReactErrorUtils.hasCaughtError;
  var clearCaughtError = ReactErrorUtils.clearCaughtError;
  
  
  {
    var didWarnAboutStateTransition = false;
    var didWarnSetStateChildContext = false;
    var didWarnStateUpdateForUnmountedComponent = {};
  
    var warnAboutUpdateOnUnmounted = function (fiber) {
      var componentName = getComponentName(fiber) || 'ReactClass';
      if (didWarnStateUpdateForUnmountedComponent[componentName]) {
        return;
      }
      warning_1$1(false, 'Can only update a mounted or mounting ' + 'component. This usually means you called setState, replaceState, ' + 'or forceUpdate on an unmounted component. This is a no-op.\n\nPlease ' + 'check the code for the %s component.', componentName);
      didWarnStateUpdateForUnmountedComponent[componentName] = true;
    };
  
    var warnAboutInvalidUpdates = function (instance) {
      switch (ReactDebugCurrentFiber.phase) {
        case 'getChildContext':
          if (didWarnSetStateChildContext) {
            return;
          }
          warning_1$1(false, 'setState(...): Cannot call setState() inside getChildContext()');
          didWarnSetStateChildContext = true;
          break;
        case 'render':
          if (didWarnAboutStateTransition) {
            return;
          }
          warning_1$1(false, 'Cannot update during an existing state transition (such as within ' + "`render` or another component's constructor). Render methods should " + 'be a pure function of props and state; constructor side-effects are ' + 'an anti-pattern, but can be moved to `componentWillMount`.');
          didWarnAboutStateTransition = true;
          break;
      }
    };
  }
  
  var ReactFiberScheduler = function (config) {
    var hostContext = ReactFiberHostContext(config);
    var hydrationContext = ReactFiberHydrationContext(config);
    var popHostContainer = hostContext.popHostContainer,
        popHostContext = hostContext.popHostContext,
        resetHostContainer = hostContext.resetHostContainer;
  
    var _ReactFiberBeginWork = ReactFiberBeginWork(config, hostContext, hydrationContext, scheduleWork, computeExpirationForFiber),
        beginWork = _ReactFiberBeginWork.beginWork,
        beginFailedWork = _ReactFiberBeginWork.beginFailedWork;
  
    var _ReactFiberCompleteWo = ReactFiberCompleteWork(config, hostContext, hydrationContext),
        completeWork = _ReactFiberCompleteWo.completeWork;
  
    var _ReactFiberCommitWork = ReactFiberCommitWork(config, captureError),
        commitResetTextContent = _ReactFiberCommitWork.commitResetTextContent,
        commitPlacement = _ReactFiberCommitWork.commitPlacement,
        commitDeletion = _ReactFiberCommitWork.commitDeletion,
        commitWork = _ReactFiberCommitWork.commitWork,
        commitLifeCycles = _ReactFiberCommitWork.commitLifeCycles,
        commitAttachRef = _ReactFiberCommitWork.commitAttachRef,
        commitDetachRef = _ReactFiberCommitWork.commitDetachRef;
  
    var now = config.now,
        scheduleDeferredCallback = config.scheduleDeferredCallback,
        useSyncScheduling = config.useSyncScheduling,
        prepareForCommit = config.prepareForCommit,
        resetAfterCommit = config.resetAfterCommit;
  
    // Represents the current time in ms.
  
    var startTime = now();
    var mostRecentCurrentTime = msToExpirationTime(0);
  
    // Represents the expiration time that incoming updates should use. (If this
    // is NoWork, use the default strategy: async updates in async mode, sync
    // updates in sync mode.)
    var expirationContext = NoWork;
  
    var isWorking = false;
  
    // The next work in progress fiber that we're currently working on.
    var nextUnitOfWork = null;
    var nextRoot = null;
    // The time at which we're currently rendering work.
    var nextRenderExpirationTime = NoWork;
  
    // The next fiber with an effect that we're currently committing.
    var nextEffect = null;
  
    // Keep track of which fibers have captured an error that need to be handled.
    // Work is removed from this collection after componentDidCatch is called.
    var capturedErrors = null;
    // Keep track of which fibers have failed during the current batch of work.
    // This is a different set than capturedErrors, because it is not reset until
    // the end of the batch. This is needed to propagate errors correctly if a
    // subtree fails more than once.
    var failedBoundaries = null;
    // Error boundaries that captured an error during the current commit.
    var commitPhaseBoundaries = null;
    var firstUncaughtError = null;
    var didFatal = false;
  
    var isCommitting = false;
    var isUnmounting = false;
  
    // Used for performance tracking.
    var interruptedBy = null;
  
    function resetContextStack() {
      // Reset the stack
      reset$1();
      // Reset the cursors
      resetContext();
      resetHostContainer();
    }
  
    function commitAllHostEffects() {
      while (nextEffect !== null) {
        {
          ReactDebugCurrentFiber.setCurrentFiber(nextEffect);
        }
        recordEffect();
  
        var effectTag = nextEffect.effectTag;
        if (effectTag & ContentReset) {
          commitResetTextContent(nextEffect);
        }
  
        if (effectTag & Ref) {
          var current = nextEffect.alternate;
          if (current !== null) {
            commitDetachRef(current);
          }
        }
  
        // The following switch statement is only concerned about placement,
        // updates, and deletions. To avoid needing to add a case for every
        // possible bitmap value, we remove the secondary effects from the
        // effect tag and switch on that value.
        var primaryEffectTag = effectTag & ~(Callback | Err | ContentReset | Ref | PerformedWork);
        switch (primaryEffectTag) {
          case Placement:
            {
              commitPlacement(nextEffect);
              // Clear the "placement" from effect tag so that we know that this is inserted, before
              // any life-cycles like componentDidMount gets called.
              // TODO: findDOMNode doesn't rely on this any more but isMounted
              // does and isMounted is deprecated anyway so we should be able
              // to kill this.
              nextEffect.effectTag &= ~Placement;
              break;
            }
          case PlacementAndUpdate:
            {
              // Placement
              commitPlacement(nextEffect);
              // Clear the "placement" from effect tag so that we know that this is inserted, before
              // any life-cycles like componentDidMount gets called.
              nextEffect.effectTag &= ~Placement;
  
              // Update
              var _current = nextEffect.alternate;
              commitWork(_current, nextEffect);
              break;
            }
          case Update:
            {
              var _current2 = nextEffect.alternate;
              commitWork(_current2, nextEffect);
              break;
            }
          case Deletion:
            {
              isUnmounting = true;
              commitDeletion(nextEffect);
              isUnmounting = false;
              break;
            }
        }
        nextEffect = nextEffect.nextEffect;
      }
  
      {
        ReactDebugCurrentFiber.resetCurrentFiber();
      }
    }
  
    function commitAllLifeCycles() {
      while (nextEffect !== null) {
        var effectTag = nextEffect.effectTag;
  
        if (effectTag & (Update | Callback)) {
          recordEffect();
          var current = nextEffect.alternate;
          commitLifeCycles(current, nextEffect);
        }
  
        if (effectTag & Ref) {
          recordEffect();
          commitAttachRef(nextEffect);
        }
  
        if (effectTag & Err) {
          recordEffect();
          commitErrorHandling(nextEffect);
        }
  
        var next = nextEffect.nextEffect;
        // Ensure that we clean these up so that we don't accidentally keep them.
        // I'm not actually sure this matters because we can't reset firstEffect
        // and lastEffect since they're on every node, not just the effectful
        // ones. So we have to clean everything as we reuse nodes anyway.
        nextEffect.nextEffect = null;
        // Ensure that we reset the effectTag here so that we can rely on effect
        // tags to reason about the current life-cycle.
        nextEffect = next;
      }
    }
  
    function commitRoot(finishedWork) {
      // We keep track of this so that captureError can collect any boundaries
      // that capture an error during the commit phase. The reason these aren't
      // local to this function is because errors that occur during cWU are
      // captured elsewhere, to prevent the unmount from being interrupted.
      isWorking = true;
      isCommitting = true;
      startCommitTimer();
  
      var root = finishedWork.stateNode;
      !(root.current !== finishedWork) ? invariant_1$1(false, 'Cannot commit the same tree as before. This is probably a bug related to the return field. This error is likely caused by a bug in React. Please file an issue.') : void 0;
      root.isReadyForCommit = false;
  
      // Reset this to null before calling lifecycles
      ReactCurrentOwner.current = null;
  
      var firstEffect = void 0;
      if (finishedWork.effectTag > PerformedWork) {
        // A fiber's effect list consists only of its children, not itself. So if
        // the root has an effect, we need to add it to the end of the list. The
        // resulting list is the set that would belong to the root's parent, if
        // it had one; that is, all the effects in the tree including the root.
        if (finishedWork.lastEffect !== null) {
          finishedWork.lastEffect.nextEffect = finishedWork;
          firstEffect = finishedWork.firstEffect;
        } else {
          firstEffect = finishedWork;
        }
      } else {
        // There is no effect on the root.
        firstEffect = finishedWork.firstEffect;
      }
  
      prepareForCommit();
  
      // Commit all the side-effects within a tree. We'll do this in two passes.
      // The first pass performs all the host insertions, updates, deletions and
      // ref unmounts.
      nextEffect = firstEffect;
      startCommitHostEffectsTimer();
      while (nextEffect !== null) {
        var didError = false;
        var _error = void 0;
        {
          invokeGuardedCallback$1(null, commitAllHostEffects, null);
          if (hasCaughtError()) {
            didError = true;
            _error = clearCaughtError();
          }
        }
        if (didError) {
          !(nextEffect !== null) ? invariant_1$1(false, 'Should have next effect. This error is likely caused by a bug in React. Please file an issue.') : void 0;
          captureError(nextEffect, _error);
          // Clean-up
          if (nextEffect !== null) {
            nextEffect = nextEffect.nextEffect;
          }
        }
      }
      stopCommitHostEffectsTimer();
  
      resetAfterCommit();
  
      // The work-in-progress tree is now the current tree. This must come after
      // the first pass of the commit phase, so that the previous tree is still
      // current during componentWillUnmount, but before the second pass, so that
      // the finished work is current during componentDidMount/Update.
      root.current = finishedWork;
  
      // In the second pass we'll perform all life-cycles and ref callbacks.
      // Life-cycles happen as a separate pass so that all placements, updates,
      // and deletions in the entire tree have already been invoked.
      // This pass also triggers any renderer-specific initial effects.
      nextEffect = firstEffect;
      startCommitLifeCyclesTimer();
      while (nextEffect !== null) {
        var _didError = false;
        var _error2 = void 0;
        {
          invokeGuardedCallback$1(null, commitAllLifeCycles, null);
          if (hasCaughtError()) {
            _didError = true;
            _error2 = clearCaughtError();
          }
        }
        if (_didError) {
          !(nextEffect !== null) ? invariant_1$1(false, 'Should have next effect. This error is likely caused by a bug in React. Please file an issue.') : void 0;
          captureError(nextEffect, _error2);
          if (nextEffect !== null) {
            nextEffect = nextEffect.nextEffect;
          }
        }
      }
  
      isCommitting = false;
      isWorking = false;
      stopCommitLifeCyclesTimer();
      stopCommitTimer();
      if (typeof onCommitRoot === 'function') {
        onCommitRoot(finishedWork.stateNode);
      }
      if (true && ReactFiberInstrumentation_1.debugTool) {
        ReactFiberInstrumentation_1.debugTool.onCommitWork(finishedWork);
      }
  
      // If we caught any errors during this commit, schedule their boundaries
      // to update.
      if (commitPhaseBoundaries) {
        commitPhaseBoundaries.forEach(scheduleErrorRecovery);
        commitPhaseBoundaries = null;
      }
  
      if (firstUncaughtError !== null) {
        var _error3 = firstUncaughtError;
        firstUncaughtError = null;
        onUncaughtError(_error3);
      }
  
      var remainingTime = root.current.expirationTime;
  
      if (remainingTime === NoWork) {
        capturedErrors = null;
        failedBoundaries = null;
      }
  
      return remainingTime;
    }
  
    function resetExpirationTime(workInProgress, renderTime) {
      if (renderTime !== Never && workInProgress.expirationTime === Never) {
        // The children of this component are hidden. Don't bubble their
        // expiration times.
        return;
      }
  
      // Check for pending updates.
      var newExpirationTime = getUpdateExpirationTime(workInProgress);
  
      // TODO: Calls need to visit stateNode
  
      // Bubble up the earliest expiration time.
      var child = workInProgress.child;
      while (child !== null) {
        if (child.expirationTime !== NoWork && (newExpirationTime === NoWork || newExpirationTime > child.expirationTime)) {
          newExpirationTime = child.expirationTime;
        }
        child = child.sibling;
      }
      workInProgress.expirationTime = newExpirationTime;
    }
  
    function completeUnitOfWork(workInProgress) {
      while (true) {
        // The current, flushed, state of this fiber is the alternate.
        // Ideally nothing should rely on this, but relying on it here
        // means that we don't need an additional field on the work in
        // progress.
        var current = workInProgress.alternate;
        {
          ReactDebugCurrentFiber.setCurrentFiber(workInProgress);
        }
        var next = completeWork(current, workInProgress, nextRenderExpirationTime);
        {
          ReactDebugCurrentFiber.resetCurrentFiber();
        }
  
        var returnFiber = workInProgress['return'];
        var siblingFiber = workInProgress.sibling;
  
        resetExpirationTime(workInProgress, nextRenderExpirationTime);
  
        if (next !== null) {
          stopWorkTimer(workInProgress);
          if (true && ReactFiberInstrumentation_1.debugTool) {
            ReactFiberInstrumentation_1.debugTool.onCompleteWork(workInProgress);
          }
          // If completing this work spawned new work, do that next. We'll come
          // back here again.
          return next;
        }
  
        if (returnFiber !== null) {
          // Append all the effects of the subtree and this fiber onto the effect
          // list of the parent. The completion order of the children affects the
          // side-effect order.
          if (returnFiber.firstEffect === null) {
            returnFiber.firstEffect = workInProgress.firstEffect;
          }
          if (workInProgress.lastEffect !== null) {
            if (returnFiber.lastEffect !== null) {
              returnFiber.lastEffect.nextEffect = workInProgress.firstEffect;
            }
            returnFiber.lastEffect = workInProgress.lastEffect;
          }
  
          // If this fiber had side-effects, we append it AFTER the children's
          // side-effects. We can perform certain side-effects earlier if
          // needed, by doing multiple passes over the effect list. We don't want
          // to schedule our own side-effect on our own list because if end up
          // reusing children we'll schedule this effect onto itself since we're
          // at the end.
          var effectTag = workInProgress.effectTag;
          // Skip both NoWork and PerformedWork tags when creating the effect list.
          // PerformedWork effect is read by React DevTools but shouldn't be committed.
          if (effectTag > PerformedWork) {
            if (returnFiber.lastEffect !== null) {
              returnFiber.lastEffect.nextEffect = workInProgress;
            } else {
              returnFiber.firstEffect = workInProgress;
            }
            returnFiber.lastEffect = workInProgress;
          }
        }
  
        stopWorkTimer(workInProgress);
        if (true && ReactFiberInstrumentation_1.debugTool) {
          ReactFiberInstrumentation_1.debugTool.onCompleteWork(workInProgress);
        }
  
        if (siblingFiber !== null) {
          // If there is more work to do in this returnFiber, do that next.
          return siblingFiber;
        } else if (returnFiber !== null) {
          // If there's no more work in this returnFiber. Complete the returnFiber.
          workInProgress = returnFiber;
          continue;
        } else {
          // We've reached the root.
          var root = workInProgress.stateNode;
          root.isReadyForCommit = true;
          return null;
        }
      }
  
      // Without this explicit null return Flow complains of invalid return type
      // TODO Remove the above while(true) loop
      // eslint-disable-next-line no-unreachable
      return null;
    }
  
    function performUnitOfWork(workInProgress) {
      // The current, flushed, state of this fiber is the alternate.
      // Ideally nothing should rely on this, but relying on it here
      // means that we don't need an additional field on the work in
      // progress.
      var current = workInProgress.alternate;
  
      // See if beginning this work spawns more work.
      startWorkTimer(workInProgress);
      {
        ReactDebugCurrentFiber.setCurrentFiber(workInProgress);
      }
      var next = beginWork(current, workInProgress, nextRenderExpirationTime);
      {
        ReactDebugCurrentFiber.resetCurrentFiber();
      }
      if (true && ReactFiberInstrumentation_1.debugTool) {
        ReactFiberInstrumentation_1.debugTool.onBeginWork(workInProgress);
      }
  
      if (next === null) {
        // If this doesn't spawn new work, complete the current work.
        next = completeUnitOfWork(workInProgress);
      }
  
      ReactCurrentOwner.current = null;
  
      return next;
    }
  
    function performFailedUnitOfWork(workInProgress) {
      // The current, flushed, state of this fiber is the alternate.
      // Ideally nothing should rely on this, but relying on it here
      // means that we don't need an additional field on the work in
      // progress.
      var current = workInProgress.alternate;
  
      // See if beginning this work spawns more work.
      startWorkTimer(workInProgress);
      {
        ReactDebugCurrentFiber.setCurrentFiber(workInProgress);
      }
      var next = beginFailedWork(current, workInProgress, nextRenderExpirationTime);
      {
        ReactDebugCurrentFiber.resetCurrentFiber();
      }
      if (true && ReactFiberInstrumentation_1.debugTool) {
        ReactFiberInstrumentation_1.debugTool.onBeginWork(workInProgress);
      }
  
      if (next === null) {
        // If this doesn't spawn new work, complete the current work.
        next = completeUnitOfWork(workInProgress);
      }
  
      ReactCurrentOwner.current = null;
  
      return next;
    }
  
    function workLoop(expirationTime) {
      if (capturedErrors !== null) {
        // If there are unhandled errors, switch to the slow work loop.
        // TODO: How to avoid this check in the fast path? Maybe the renderer
        // could keep track of which roots have unhandled errors and call a
        // forked version of renderRoot.
        slowWorkLoopThatChecksForFailedWork(expirationTime);
        return;
      }
      if (nextRenderExpirationTime === NoWork || nextRenderExpirationTime > expirationTime) {
        return;
      }
  
      if (nextRenderExpirationTime <= mostRecentCurrentTime) {
        // Flush all expired work.
        while (nextUnitOfWork !== null) {
          nextUnitOfWork = performUnitOfWork(nextUnitOfWork);
        }
      } else {
        // Flush asynchronous work until the deadline runs out of time.
        while (nextUnitOfWork !== null && !shouldYield()) {
          nextUnitOfWork = performUnitOfWork(nextUnitOfWork);
        }
      }
    }
  
    function slowWorkLoopThatChecksForFailedWork(expirationTime) {
      if (nextRenderExpirationTime === NoWork || nextRenderExpirationTime > expirationTime) {
        return;
      }
  
      if (nextRenderExpirationTime <= mostRecentCurrentTime) {
        // Flush all expired work.
        while (nextUnitOfWork !== null) {
          if (hasCapturedError(nextUnitOfWork)) {
            // Use a forked version of performUnitOfWork
            nextUnitOfWork = performFailedUnitOfWork(nextUnitOfWork);
          } else {
            nextUnitOfWork = performUnitOfWork(nextUnitOfWork);
          }
        }
      } else {
        // Flush asynchronous work until the deadline runs out of time.
        while (nextUnitOfWork !== null && !shouldYield()) {
          if (hasCapturedError(nextUnitOfWork)) {
            // Use a forked version of performUnitOfWork
            nextUnitOfWork = performFailedUnitOfWork(nextUnitOfWork);
          } else {
            nextUnitOfWork = performUnitOfWork(nextUnitOfWork);
          }
        }
      }
    }
  
    function renderRootCatchBlock(root, failedWork, boundary, expirationTime) {
      // We're going to restart the error boundary that captured the error.
      // Conceptually, we're unwinding the stack. We need to unwind the
      // context stack, too.
      unwindContexts(failedWork, boundary);
  
      // Restart the error boundary using a forked version of
      // performUnitOfWork that deletes the boundary's children. The entire
      // failed subree will be unmounted. During the commit phase, a special
      // lifecycle method is called on the error boundary, which triggers
      // a re-render.
      nextUnitOfWork = performFailedUnitOfWork(boundary);
  
      // Continue working.
      workLoop(expirationTime);
    }
  
    function renderRoot(root, expirationTime) {
      !!isWorking ? invariant_1$1(false, 'renderRoot was called recursively. This error is likely caused by a bug in React. Please file an issue.') : void 0;
      isWorking = true;
  
      // We're about to mutate the work-in-progress tree. If the root was pending
      // commit, it no longer is: we'll need to complete it again.
      root.isReadyForCommit = false;
  
      // Check if we're starting from a fresh stack, or if we're resuming from
      // previously yielded work.
      if (root !== nextRoot || expirationTime !== nextRenderExpirationTime || nextUnitOfWork === null) {
        // Reset the stack and start working from the root.
        resetContextStack();
        nextRoot = root;
        nextRenderExpirationTime = expirationTime;
        nextUnitOfWork = createWorkInProgress(nextRoot.current, null, expirationTime);
      }
  
      startWorkLoopTimer(nextUnitOfWork);
  
      var didError = false;
      var error = null;
      {
        invokeGuardedCallback$1(null, workLoop, null, expirationTime);
        if (hasCaughtError()) {
          didError = true;
          error = clearCaughtError();
        }
      }
  
      // An error was thrown during the render phase.
      while (didError) {
        if (didFatal) {
          // This was a fatal error. Don't attempt to recover from it.
          firstUncaughtError = error;
          break;
        }
  
        var failedWork = nextUnitOfWork;
        if (failedWork === null) {
          // An error was thrown but there's no current unit of work. This can
          // happen during the commit phase if there's a bug in the renderer.
          didFatal = true;
          continue;
        }
  
        // "Capture" the error by finding the nearest boundary. If there is no
        // error boundary, we use the root.
        var boundary = captureError(failedWork, error);
        !(boundary !== null) ? invariant_1$1(false, 'Should have found an error boundary. This error is likely caused by a bug in React. Please file an issue.') : void 0;
  
        if (didFatal) {
          // The error we just captured was a fatal error. This happens
          // when the error propagates to the root more than once.
          continue;
        }
  
        didError = false;
        error = null;
        {
          invokeGuardedCallback$1(null, renderRootCatchBlock, null, root, failedWork, boundary, expirationTime);
          if (hasCaughtError()) {
            didError = true;
            error = clearCaughtError();
            continue;
          }
        }
        // We're finished working. Exit the error loop.
        break;
      }
  
      var uncaughtError = firstUncaughtError;
  
      // We're done performing work. Time to clean up.
      stopWorkLoopTimer(interruptedBy);
      interruptedBy = null;
      isWorking = false;
      didFatal = false;
      firstUncaughtError = null;
  
      if (uncaughtError !== null) {
        onUncaughtError(uncaughtError);
      }
  
      return root.isReadyForCommit ? root.current.alternate : null;
    }
  
    // Returns the boundary that captured the error, or null if the error is ignored
    function captureError(failedWork, error) {
      // It is no longer valid because we exited the user code.
      ReactCurrentOwner.current = null;
      {
        ReactDebugCurrentFiber.resetCurrentFiber();
      }
  
      // Search for the nearest error boundary.
      var boundary = null;
  
      // Passed to logCapturedError()
      var errorBoundaryFound = false;
      var willRetry = false;
      var errorBoundaryName = null;
  
      // Host containers are a special case. If the failed work itself is a host
      // container, then it acts as its own boundary. In all other cases, we
      // ignore the work itself and only search through the parents.
      if (failedWork.tag === HostRoot) {
        boundary = failedWork;
  
        if (isFailedBoundary(failedWork)) {
          // If this root already failed, there must have been an error when
          // attempting to unmount it. This is a worst-case scenario and
          // should only be possible if there's a bug in the renderer.
          didFatal = true;
        }
      } else {
        var node = failedWork['return'];
        while (node !== null && boundary === null) {
          if (node.tag === ClassComponent) {
            var instance = node.stateNode;
            if (typeof instance.componentDidCatch === 'function') {
              errorBoundaryFound = true;
              errorBoundaryName = getComponentName(node);
  
              // Found an error boundary!
              boundary = node;
              willRetry = true;
            }
          } else if (node.tag === HostRoot) {
            // Treat the root like a no-op error boundary
            boundary = node;
          }
  
          if (isFailedBoundary(node)) {
            // This boundary is already in a failed state.
  
            // If we're currently unmounting, that means this error was
            // thrown while unmounting a failed subtree. We should ignore
            // the error.
            if (isUnmounting) {
              return null;
            }
  
            // If we're in the commit phase, we should check to see if
            // this boundary already captured an error during this commit.
            // This case exists because multiple errors can be thrown during
            // a single commit without interruption.
            if (commitPhaseBoundaries !== null && (commitPhaseBoundaries.has(node) || node.alternate !== null && commitPhaseBoundaries.has(node.alternate))) {
              // If so, we should ignore this error.
              return null;
            }
  
            // The error should propagate to the next boundary -— we keep looking.
            boundary = null;
            willRetry = false;
          }
  
          node = node['return'];
        }
      }
  
      if (boundary !== null) {
        // Add to the collection of failed boundaries. This lets us know that
        // subsequent errors in this subtree should propagate to the next boundary.
        if (failedBoundaries === null) {
          failedBoundaries = new Set();
        }
        failedBoundaries.add(boundary);
  
        // This method is unsafe outside of the begin and complete phases.
        // We might be in the commit phase when an error is captured.
        // The risk is that the return path from this Fiber may not be accurate.
        // That risk is acceptable given the benefit of providing users more context.
        var _componentStack = getStackAddendumByWorkInProgressFiber(failedWork);
        var _componentName = getComponentName(failedWork);
  
        // Add to the collection of captured errors. This is stored as a global
        // map of errors and their component stack location keyed by the boundaries
        // that capture them. We mostly use this Map as a Set; it's a Map only to
        // avoid adding a field to Fiber to store the error.
        if (capturedErrors === null) {
          capturedErrors = new Map();
        }
  
        var capturedError = {
          componentName: _componentName,
          componentStack: _componentStack,
          error: error,
          errorBoundary: errorBoundaryFound ? boundary.stateNode : null,
          errorBoundaryFound: errorBoundaryFound,
          errorBoundaryName: errorBoundaryName,
          willRetry: willRetry
        };
  
        capturedErrors.set(boundary, capturedError);
  
        try {
          logCapturedError(capturedError);
        } catch (e) {
          // Prevent cycle if logCapturedError() throws.
          // A cycle may still occur if logCapturedError renders a component that throws.
          console.error(e);
        }
  
        // If we're in the commit phase, defer scheduling an update on the
        // boundary until after the commit is complete
        if (isCommitting) {
          if (commitPhaseBoundaries === null) {
            commitPhaseBoundaries = new Set();
          }
          commitPhaseBoundaries.add(boundary);
        } else {
          // Otherwise, schedule an update now.
          // TODO: Is this actually necessary during the render phase? Is it
          // possible to unwind and continue rendering at the same priority,
          // without corrupting internal state?
          scheduleErrorRecovery(boundary);
        }
        return boundary;
      } else if (firstUncaughtError === null) {
        // If no boundary is found, we'll need to throw the error
        firstUncaughtError = error;
      }
      return null;
    }
  
    function hasCapturedError(fiber) {
      // TODO: capturedErrors should store the boundary instance, to avoid needing
      // to check the alternate.
      return capturedErrors !== null && (capturedErrors.has(fiber) || fiber.alternate !== null && capturedErrors.has(fiber.alternate));
    }
  
    function isFailedBoundary(fiber) {
      // TODO: failedBoundaries should store the boundary instance, to avoid
      // needing to check the alternate.
      return failedBoundaries !== null && (failedBoundaries.has(fiber) || fiber.alternate !== null && failedBoundaries.has(fiber.alternate));
    }
  
    function commitErrorHandling(effectfulFiber) {
      var capturedError = void 0;
      if (capturedErrors !== null) {
        capturedError = capturedErrors.get(effectfulFiber);
        capturedErrors['delete'](effectfulFiber);
        if (capturedError == null) {
          if (effectfulFiber.alternate !== null) {
            effectfulFiber = effectfulFiber.alternate;
            capturedError = capturedErrors.get(effectfulFiber);
            capturedErrors['delete'](effectfulFiber);
          }
        }
      }
  
      !(capturedError != null) ? invariant_1$1(false, 'No error for given unit of work. This error is likely caused by a bug in React. Please file an issue.') : void 0;
  
      switch (effectfulFiber.tag) {
        case ClassComponent:
          var instance = effectfulFiber.stateNode;
  
          var info = {
            componentStack: capturedError.componentStack
          };
  
          // Allow the boundary to handle the error, usually by scheduling
          // an update to itself
          instance.componentDidCatch(capturedError.error, info);
          return;
        case HostRoot:
          if (firstUncaughtError === null) {
            firstUncaughtError = capturedError.error;
          }
          return;
        default:
          invariant_1$1(false, 'Invalid type of work. This error is likely caused by a bug in React. Please file an issue.');
      }
    }
  
    function unwindContexts(from, to) {
      var node = from;
      while (node !== null) {
        switch (node.tag) {
          case ClassComponent:
            popContextProvider(node);
            break;
          case HostComponent:
            popHostContext(node);
            break;
          case HostRoot:
            popHostContainer(node);
            break;
          case HostPortal:
            popHostContainer(node);
            break;
        }
        if (node === to || node.alternate === to) {
          stopFailedWorkTimer(node);
          break;
        } else {
          stopWorkTimer(node);
        }
        node = node['return'];
      }
    }
  
    function computeAsyncExpiration() {
      // Given the current clock time, returns an expiration time. We use rounding
      // to batch like updates together.
      // Should complete within ~1000ms. 1200ms max.
      var currentTime = recalculateCurrentTime();
      var expirationMs = 1000;
      var bucketSizeMs = 200;
      return computeExpirationBucket(currentTime, expirationMs, bucketSizeMs);
    }
  
    function computeExpirationForFiber(fiber) {
      var expirationTime = void 0;
      if (expirationContext !== NoWork) {
        // An explicit expiration context was set;
        expirationTime = expirationContext;
      } else if (isWorking) {
        if (isCommitting) {
          // Updates that occur during the commit phase should have sync priority
          // by default.
          expirationTime = Sync;
        } else {
          // Updates during the render phase should expire at the same time as
          // the work that is being rendered.
          expirationTime = nextRenderExpirationTime;
        }
      } else {
        // No explicit expiration context was set, and we're not currently
        // performing work. Calculate a new expiration time.
        if (useSyncScheduling && !(fiber.internalContextTag & AsyncUpdates)) {
          // This is a sync update
          expirationTime = Sync;
        } else {
          // This is an async update
          expirationTime = computeAsyncExpiration();
        }
      }
      return expirationTime;
    }
  
    function scheduleWork(fiber, expirationTime) {
      return scheduleWorkImpl(fiber, expirationTime, false);
    }
  
    function scheduleWorkImpl(fiber, expirationTime, isErrorRecovery) {
      recordScheduleUpdate();
  
      {
        if (!isErrorRecovery && fiber.tag === ClassComponent) {
          var instance = fiber.stateNode;
          warnAboutInvalidUpdates(instance);
        }
      }
  
      var node = fiber;
      while (node !== null) {
        // Walk the parent path to the root and update each node's
        // expiration time.
        if (node.expirationTime === NoWork || node.expirationTime > expirationTime) {
          node.expirationTime = expirationTime;
        }
        if (node.alternate !== null) {
          if (node.alternate.expirationTime === NoWork || node.alternate.expirationTime > expirationTime) {
            node.alternate.expirationTime = expirationTime;
          }
        }
        if (node['return'] === null) {
          if (node.tag === HostRoot) {
            var root = node.stateNode;
            if (!isWorking && root === nextRoot && expirationTime <= nextRenderExpirationTime) {
              // Restart the root from the top.
              if (nextUnitOfWork !== null) {
                // This is an interruption. (Used for performance tracking.)
                interruptedBy = fiber;
              }
              nextRoot = null;
              nextUnitOfWork = null;
              nextRenderExpirationTime = NoWork;
            }
            requestWork(root, expirationTime);
          } else {
            {
              if (!isErrorRecovery && fiber.tag === ClassComponent) {
                warnAboutUpdateOnUnmounted(fiber);
              }
            }
            return;
          }
        }
        node = node['return'];
      }
    }
  
    function scheduleErrorRecovery(fiber) {
      scheduleWorkImpl(fiber, Sync, true);
    }
  
    function recalculateCurrentTime() {
      // Subtract initial time so it fits inside 32bits
      var ms = now() - startTime;
      mostRecentCurrentTime = msToExpirationTime(ms);
      return mostRecentCurrentTime;
    }
  
    function deferredUpdates(fn) {
      var previousExpirationContext = expirationContext;
      expirationContext = computeAsyncExpiration();
      try {
        return fn();
      } finally {
        expirationContext = previousExpirationContext;
      }
    }
  
    function syncUpdates(fn) {
      var previousExpirationContext = expirationContext;
      expirationContext = Sync;
      try {
        return fn();
      } finally {
        expirationContext = previousExpirationContext;
      }
    }
  
    // TODO: Everything below this is written as if it has been lifted to the
    // renderers. I'll do this in a follow-up.
  
    // Linked-list of roots
    var firstScheduledRoot = null;
    var lastScheduledRoot = null;
  
    var isCallbackScheduled = false;
    var isRendering = false;
    var nextFlushedRoot = null;
    var nextFlushedExpirationTime = NoWork;
    var deadlineDidExpire = false;
    var hasUnhandledError = false;
    var unhandledError = null;
    var deadline = null;
  
    var isBatchingUpdates = false;
    var isUnbatchingUpdates = false;
  
    // Use these to prevent an infinite loop of nested updates
    var NESTED_UPDATE_LIMIT = 1000;
    var nestedUpdateCount = 0;
  
    var timeHeuristicForUnitOfWork = 1;
  
    // requestWork is called by the scheduler whenever a root receives an update.
    // It's up to the renderer to call renderRoot at some point in the future.
    function requestWork(root, expirationTime) {
      if (nestedUpdateCount > NESTED_UPDATE_LIMIT) {
        invariant_1$1(false, 'Maximum update depth exceeded. This can happen when a component repeatedly calls setState inside componentWillUpdate or componentDidUpdate. React limits the number of nested updates to prevent infinite loops.');
      }
  
      // Add the root to the schedule.
      // Check if this root is already part of the schedule.
      if (root.nextScheduledRoot === null) {
        // This root is not already scheduled. Add it.
        root.remainingExpirationTime = expirationTime;
        if (lastScheduledRoot === null) {
          firstScheduledRoot = lastScheduledRoot = root;
          root.nextScheduledRoot = root;
        } else {
          lastScheduledRoot.nextScheduledRoot = root;
          lastScheduledRoot = root;
          lastScheduledRoot.nextScheduledRoot = firstScheduledRoot;
        }
      } else {
        // This root is already scheduled, but its priority may have increased.
        var remainingExpirationTime = root.remainingExpirationTime;
        if (remainingExpirationTime === NoWork || expirationTime < remainingExpirationTime) {
          // Update the priority.
          root.remainingExpirationTime = expirationTime;
        }
      }
  
      if (isRendering) {
        // Prevent reentrancy. Remaining work will be scheduled at the end of
        // the currently rendering batch.
        return;
      }
  
      if (isBatchingUpdates) {
        // Flush work at the end of the batch.
        if (isUnbatchingUpdates) {
          // ...unless we're inside unbatchedUpdates, in which case we should
          // flush it now.
          performWorkOnRoot(root, Sync);
        }
        return;
      }
  
      // TODO: Get rid of Sync and use current time?
      if (expirationTime === Sync) {
        performWork(Sync, null);
      } else if (!isCallbackScheduled) {
        isCallbackScheduled = true;
        startRequestCallbackTimer();
        scheduleDeferredCallback(performAsyncWork);
      }
    }
  
    function findHighestPriorityRoot() {
      var highestPriorityWork = NoWork;
      var highestPriorityRoot = null;
  
      if (lastScheduledRoot !== null) {
        var previousScheduledRoot = lastScheduledRoot;
        var root = firstScheduledRoot;
        while (root !== null) {
          var remainingExpirationTime = root.remainingExpirationTime;
          if (remainingExpirationTime === NoWork) {
            // This root no longer has work. Remove it from the scheduler.
  
            // TODO: This check is redudant, but Flow is confused by the branch
            // below where we set lastScheduledRoot to null, even though we break
            // from the loop right after.
            !(previousScheduledRoot !== null && lastScheduledRoot !== null) ? invariant_1$1(false, 'Should have a previous and last root. This error is likely caused by a bug in React. Please file an issue.') : void 0;
            if (root === root.nextScheduledRoot) {
              // This is the only root in the list.
              root.nextScheduledRoot = null;
              firstScheduledRoot = lastScheduledRoot = null;
              break;
            } else if (root === firstScheduledRoot) {
              // This is the first root in the list.
              var next = root.nextScheduledRoot;
              firstScheduledRoot = next;
              lastScheduledRoot.nextScheduledRoot = next;
              root.nextScheduledRoot = null;
            } else if (root === lastScheduledRoot) {
              // This is the last root in the list.
              lastScheduledRoot = previousScheduledRoot;
              lastScheduledRoot.nextScheduledRoot = firstScheduledRoot;
              root.nextScheduledRoot = null;
              break;
            } else {
              previousScheduledRoot.nextScheduledRoot = root.nextScheduledRoot;
              root.nextScheduledRoot = null;
            }
            root = previousScheduledRoot.nextScheduledRoot;
          } else {
            if (highestPriorityWork === NoWork || remainingExpirationTime < highestPriorityWork) {
              // Update the priority, if it's higher
              highestPriorityWork = remainingExpirationTime;
              highestPriorityRoot = root;
            }
            if (root === lastScheduledRoot) {
              break;
            }
            previousScheduledRoot = root;
            root = root.nextScheduledRoot;
          }
        }
      }
  
      // If the next root is the same as the previous root, this is a nested
      // update. To prevent an infinite loop, increment the nested update count.
      var previousFlushedRoot = nextFlushedRoot;
      if (previousFlushedRoot !== null && previousFlushedRoot === highestPriorityRoot) {
        nestedUpdateCount++;
      } else {
        // Reset whenever we switch roots.
        nestedUpdateCount = 0;
      }
      nextFlushedRoot = highestPriorityRoot;
      nextFlushedExpirationTime = highestPriorityWork;
    }
  
    function performAsyncWork(dl) {
      performWork(NoWork, dl);
    }
  
    function performWork(minExpirationTime, dl) {
      deadline = dl;
  
      // Keep working on roots until there's no more work, or until the we reach
      // the deadline.
      findHighestPriorityRoot();
  
      if (enableUserTimingAPI && deadline !== null) {
        var didExpire = nextFlushedExpirationTime < recalculateCurrentTime();
        stopRequestCallbackTimer(didExpire);
      }
  
      while (nextFlushedRoot !== null && nextFlushedExpirationTime !== NoWork && (minExpirationTime === NoWork || nextFlushedExpirationTime <= minExpirationTime) && !deadlineDidExpire) {
        performWorkOnRoot(nextFlushedRoot, nextFlushedExpirationTime);
        // Find the next highest priority work.
        findHighestPriorityRoot();
      }
  
      // We're done flushing work. Either we ran out of time in this callback,
      // or there's no more work left with sufficient priority.
  
      // If we're inside a callback, set this to false since we just completed it.
      if (deadline !== null) {
        isCallbackScheduled = false;
      }
      // If there's work left over, schedule a new callback.
      if (nextFlushedRoot !== null && !isCallbackScheduled) {
        isCallbackScheduled = true;
        startRequestCallbackTimer();
        scheduleDeferredCallback(performAsyncWork);
      }
  
      // Clean-up.
      deadline = null;
      deadlineDidExpire = false;
      nestedUpdateCount = 0;
  
      if (hasUnhandledError) {
        var _error4 = unhandledError;
        unhandledError = null;
        hasUnhandledError = false;
        throw _error4;
      }
    }
  
    function performWorkOnRoot(root, expirationTime) {
      !!isRendering ? invariant_1$1(false, 'performWorkOnRoot was called recursively. This error is likely caused by a bug in React. Please file an issue.') : void 0;
  
      isRendering = true;
  
      // Check if this is async work or sync/expired work.
      // TODO: Pass current time as argument to renderRoot, commitRoot
      if (expirationTime <= recalculateCurrentTime()) {
        // Flush sync work.
        var finishedWork = root.finishedWork;
        if (finishedWork !== null) {
          // This root is already complete. We can commit it.
          root.finishedWork = null;
          root.remainingExpirationTime = commitRoot(finishedWork);
        } else {
          root.finishedWork = null;
          finishedWork = renderRoot(root, expirationTime);
          if (finishedWork !== null) {
            // We've completed the root. Commit it.
            root.remainingExpirationTime = commitRoot(finishedWork);
          }
        }
      } else {
        // Flush async work.
        var _finishedWork = root.finishedWork;
        if (_finishedWork !== null) {
          // This root is already complete. We can commit it.
          root.finishedWork = null;
          root.remainingExpirationTime = commitRoot(_finishedWork);
        } else {
          root.finishedWork = null;
          _finishedWork = renderRoot(root, expirationTime);
          if (_finishedWork !== null) {
            // We've completed the root. Check the deadline one more time
            // before committing.
            if (!shouldYield()) {
              // Still time left. Commit the root.
              root.remainingExpirationTime = commitRoot(_finishedWork);
            } else {
              // There's no time left. Mark this root as complete. We'll come
              // back and commit it later.
              root.finishedWork = _finishedWork;
            }
          }
        }
      }
  
      isRendering = false;
    }
  
    // When working on async work, the reconciler asks the renderer if it should
    // yield execution. For DOM, we implement this with requestIdleCallback.
    function shouldYield() {
      if (deadline === null) {
        return false;
      }
      if (deadline.timeRemaining() > timeHeuristicForUnitOfWork) {
        return false;
      }
      deadlineDidExpire = true;
      return true;
    }
  
    // TODO: Not happy about this hook. Conceptually, renderRoot should return a
    // tuple of (isReadyForCommit, didError, error)
    function onUncaughtError(error) {
      !(nextFlushedRoot !== null) ? invariant_1$1(false, 'Should be working on a root. This error is likely caused by a bug in React. Please file an issue.') : void 0;
      // Unschedule this root so we don't work on it again until there's
      // another update.
      nextFlushedRoot.remainingExpirationTime = NoWork;
      if (!hasUnhandledError) {
        hasUnhandledError = true;
        unhandledError = error;
      }
    }
  
    // TODO: Batching should be implemented at the renderer level, not inside
    // the reconciler.
    function batchedUpdates(fn, a) {
      var previousIsBatchingUpdates = isBatchingUpdates;
      isBatchingUpdates = true;
      try {
        return fn(a);
      } finally {
        isBatchingUpdates = previousIsBatchingUpdates;
        if (!isBatchingUpdates && !isRendering) {
          performWork(Sync, null);
        }
      }
    }
  
    // TODO: Batching should be implemented at the renderer level, not inside
    // the reconciler.
    function unbatchedUpdates(fn) {
      if (isBatchingUpdates && !isUnbatchingUpdates) {
        isUnbatchingUpdates = true;
        try {
          return fn();
        } finally {
          isUnbatchingUpdates = false;
        }
      }
      return fn();
    }
  
    // TODO: Batching should be implemented at the renderer level, not within
    // the reconciler.
    function flushSync(fn) {
      var previousIsBatchingUpdates = isBatchingUpdates;
      isBatchingUpdates = true;
      try {
        return syncUpdates(fn);
      } finally {
        isBatchingUpdates = previousIsBatchingUpdates;
        !!isRendering ? invariant_1$1(false, 'flushSync was called from inside a lifecycle method. It cannot be called when React is already rendering.') : void 0;
        performWork(Sync, null);
      }
    }
  
    return {
      computeAsyncExpiration: computeAsyncExpiration,
      computeExpirationForFiber: computeExpirationForFiber,
      scheduleWork: scheduleWork,
      batchedUpdates: batchedUpdates,
      unbatchedUpdates: unbatchedUpdates,
      flushSync: flushSync,
      deferredUpdates: deferredUpdates
    };
  };
  
  {
    var didWarnAboutNestedUpdates = false;
  }
  
  // 0 is PROD, 1 is DEV.
  // Might add PROFILE later.
  
  
  function getContextForSubtree(parentComponent) {
    if (!parentComponent) {
      return emptyObject_1;
    }
  
    var fiber = get(parentComponent);
    var parentContext = findCurrentUnmaskedContext(fiber);
    return isContextProvider(fiber) ? processChildContext(fiber, parentContext) : parentContext;
  }
  
  var ReactFiberReconciler$1 = function (config) {
    var getPublicInstance = config.getPublicInstance;
  
    var _ReactFiberScheduler = ReactFiberScheduler(config),
        computeAsyncExpiration = _ReactFiberScheduler.computeAsyncExpiration,
        computeExpirationForFiber = _ReactFiberScheduler.computeExpirationForFiber,
        scheduleWork = _ReactFiberScheduler.scheduleWork,
        batchedUpdates = _ReactFiberScheduler.batchedUpdates,
        unbatchedUpdates = _ReactFiberScheduler.unbatchedUpdates,
        flushSync = _ReactFiberScheduler.flushSync,
        deferredUpdates = _ReactFiberScheduler.deferredUpdates;
  
    function scheduleTopLevelUpdate(current, element, callback) {
      {
        if (ReactDebugCurrentFiber.phase === 'render' && ReactDebugCurrentFiber.current !== null && !didWarnAboutNestedUpdates) {
          didWarnAboutNestedUpdates = true;
          warning_1$1(false, 'Render methods should be a pure function of props and state; ' + 'triggering nested component updates from render is not allowed. ' + 'If necessary, trigger nested updates in componentDidUpdate.\n\n' + 'Check the render method of %s.', getComponentName(ReactDebugCurrentFiber.current) || 'Unknown');
        }
      }
  
      callback = callback === undefined ? null : callback;
      {
        warning_1$1(callback === null || typeof callback === 'function', 'render(...): Expected the last optional `callback` argument to be a ' + 'function. Instead received: %s.', callback);
      }
  
      var expirationTime = void 0;
      // Check if the top-level element is an async wrapper component. If so,
      // treat updates to the root as async. This is a bit weird but lets us
      // avoid a separate `renderAsync` API.
      if (enableAsyncSubtreeAPI && element != null && element.type != null && element.type.prototype != null && element.type.prototype.unstable_isAsyncReactComponent === true) {
        expirationTime = computeAsyncExpiration();
      } else {
        expirationTime = computeExpirationForFiber(current);
      }
  
      var update = {
        expirationTime: expirationTime,
        partialState: { element: element },
        callback: callback,
        isReplace: false,
        isForced: false,
        nextCallback: null,
        next: null
      };
      insertUpdateIntoFiber(current, update);
      scheduleWork(current, expirationTime);
    }
  
    function findHostInstance(fiber) {
      var hostFiber = findCurrentHostFiber(fiber);
      if (hostFiber === null) {
        return null;
      }
      return hostFiber.stateNode;
    }
  
    return {
      createContainer: function (containerInfo, hydrate) {
        return createFiberRoot(containerInfo, hydrate);
      },
      updateContainer: function (element, container, parentComponent, callback) {
        // TODO: If this is a nested container, this won't be the root.
        var current = container.current;
  
        {
          if (ReactFiberInstrumentation_1.debugTool) {
            if (current.alternate === null) {
              ReactFiberInstrumentation_1.debugTool.onMountContainer(container);
            } else if (element === null) {
              ReactFiberInstrumentation_1.debugTool.onUnmountContainer(container);
            } else {
              ReactFiberInstrumentation_1.debugTool.onUpdateContainer(container);
            }
          }
        }
  
        var context = getContextForSubtree(parentComponent);
        if (container.context === null) {
          container.context = context;
        } else {
          container.pendingContext = context;
        }
  
        scheduleTopLevelUpdate(current, element, callback);
      },
  
  
      batchedUpdates: batchedUpdates,
  
      unbatchedUpdates: unbatchedUpdates,
  
      deferredUpdates: deferredUpdates,
  
      flushSync: flushSync,
  
      getPublicRootInstance: function (container) {
        var containerFiber = container.current;
        if (!containerFiber.child) {
          return null;
        }
        switch (containerFiber.child.tag) {
          case HostComponent:
            return getPublicInstance(containerFiber.child.stateNode);
          default:
            return containerFiber.child.stateNode;
        }
      },
  
  
      findHostInstance: findHostInstance,
  
      findHostInstanceWithNoPortals: function (fiber) {
        var hostFiber = findCurrentHostFiberWithNoPortals(fiber);
        if (hostFiber === null) {
          return null;
        }
        return hostFiber.stateNode;
      },
      injectIntoDevTools: function (devToolsConfig) {
        var findFiberByHostInstance = devToolsConfig.findFiberByHostInstance;
  
        return injectInternals(_assign({}, devToolsConfig, {
          findHostInstanceByFiber: function (fiber) {
            return findHostInstance(fiber);
          },
          findFiberByHostInstance: function (instance) {
            if (!findFiberByHostInstance) {
              // Might not be implemented by the renderer.
              return null;
            }
            return findFiberByHostInstance(instance);
          }
        }));
      }
    };
  };
  
  var ReactFiberReconciler$2 = Object.freeze({
  	default: ReactFiberReconciler$1
  });
  
  var ReactFiberReconciler$3 = ( ReactFiberReconciler$2 && ReactFiberReconciler$1 ) || ReactFiberReconciler$2;
  
  // TODO: bundle Flow types with the package.
  
  
  
  // TODO: decide on the top-level export form.
  // This is hacky but makes it work with both Rollup and Jest.
  var reactReconciler = ReactFiberReconciler$3['default'] ? ReactFiberReconciler$3['default'] : ReactFiberReconciler$3;
  
  // TODO: this is special because it gets imported during build.
  
  var ReactVersion = '16.1.1';
  
  // a requestAnimationFrame, storing the time for the start of the frame, then
  // scheduling a postMessage which gets scheduled after paint. Within the
  // postMessage handler do as much work as possible until time + frame rate.
  // By separating the idle call into a separate event tick we ensure that
  // layout, paint and other browser work is counted against the available time.
  // The frame rate is dynamically adjusted.
  
  {
    if (ExecutionEnvironment_1.canUseDOM && typeof requestAnimationFrame !== 'function') {
      warning_1$1(false, 'React depends on requestAnimationFrame. Make sure that you load a ' + 'polyfill in older browsers. http://fb.me/react-polyfills');
    }
  }
  
  var hasNativePerformanceNow = typeof performance === 'object' && typeof performance.now === 'function';
  
  var now = void 0;
  if (hasNativePerformanceNow) {
    now = function () {
      return performance.now();
    };
  } else {
    now = function () {
      return Date.now();
    };
  }
  
  // TODO: There's no way to cancel, because Fiber doesn't atm.
  var rIC = void 0;
  
  if (!ExecutionEnvironment_1.canUseDOM) {
    rIC = function (frameCallback) {
      setTimeout(function () {
        frameCallback({
          timeRemaining: function () {
            return Infinity;
          }
        });
      });
      return 0;
    };
  } else if (typeof requestIdleCallback !== 'function') {
    // Polyfill requestIdleCallback.
  
    var scheduledRICCallback = null;
  
    var isIdleScheduled = false;
    var isAnimationFrameScheduled = false;
  
    var frameDeadline = 0;
    // We start out assuming that we run at 30fps but then the heuristic tracking
    // will adjust this value to a faster fps if we get more frequent animation
    // frames.
    var previousFrameTime = 33;
    var activeFrameTime = 33;
  
    var frameDeadlineObject;
    if (hasNativePerformanceNow) {
      frameDeadlineObject = {
        timeRemaining: function () {
          // We assume that if we have a performance timer that the rAF callback
          // gets a performance timer value. Not sure if this is always true.
          return frameDeadline - performance.now();
        }
      };
    } else {
      frameDeadlineObject = {
        timeRemaining: function () {
          // Fallback to Date.now()
          return frameDeadline - Date.now();
        }
      };
    }
  
    // We use the postMessage trick to defer idle work until after the repaint.
    var messageKey = '__reactIdleCallback$' + Math.random().toString(36).slice(2);
    var idleTick = function (event) {
      if (event.source !== window || event.data !== messageKey) {
        return;
      }
      isIdleScheduled = false;
      var callback = scheduledRICCallback;
      scheduledRICCallback = null;
      if (callback !== null) {
        callback(frameDeadlineObject);
      }
    };
    // Assumes that we have addEventListener in this environment. Might need
    // something better for old IE.
    window.addEventListener('message', idleTick, false);
  
    var animationTick = function (rafTime) {
      isAnimationFrameScheduled = false;
      var nextFrameTime = rafTime - frameDeadline + activeFrameTime;
      if (nextFrameTime < activeFrameTime && previousFrameTime < activeFrameTime) {
        if (nextFrameTime < 8) {
          // Defensive coding. We don't support higher frame rates than 120hz.
          // If we get lower than that, it is probably a bug.
          nextFrameTime = 8;
        }
        // If one frame goes long, then the next one can be short to catch up.
        // If two frames are short in a row, then that's an indication that we
        // actually have a higher frame rate than what we're currently optimizing.
        // We adjust our heuristic dynamically accordingly. For example, if we're
        // running on 120hz display or 90hz VR display.
        // Take the max of the two in case one of them was an anomaly due to
        // missed frame deadlines.
        activeFrameTime = nextFrameTime < previousFrameTime ? previousFrameTime : nextFrameTime;
      } else {
        previousFrameTime = nextFrameTime;
      }
      frameDeadline = rafTime + activeFrameTime;
      if (!isIdleScheduled) {
        isIdleScheduled = true;
        window.postMessage(messageKey, '*');
      }
    };
  
    rIC = function (callback) {
      // This assumes that we only schedule one callback at a time because that's
      // how Fiber uses it.
      scheduledRICCallback = callback;
      if (!isAnimationFrameScheduled) {
        // If rAF didn't already schedule one, we need to schedule a frame.
        // TODO: If this rAF doesn't materialize because the browser throttles, we
        // might want to still have setTimeout trigger rIC as a backup to ensure
        // that we keep performing work.
        isAnimationFrameScheduled = true;
        requestAnimationFrame(animationTick);
      }
      return 0;
    };
  } else {
    rIC = requestIdleCallback;
  }
  
  /**
   * Forked from fbjs/warning:
   * https://github.com/facebook/fbjs/blob/e66ba20ad5be433eb54423f2b097d829324d9de6/packages/fbjs/src/__forks__/warning.js
   *
   * Only change is we use console.warn instead of console.error,
   * and do nothing when 'console' is not supported.
   * This really simplifies the code.
   * ---
   * Similar to invariant but only logs a warning if the condition is not met.
   * This can be used to log issues in development environments in critical
   * paths. Removing the logging code for production environments will keep the
   * same logic and follow the same code paths.
   */
  
  var lowPriorityWarning = function () {};
  
  {
    var printWarning$1 = function (format) {
      for (var _len = arguments.length, args = Array(_len > 1 ? _len - 1 : 0), _key = 1; _key < _len; _key++) {
        args[_key - 1] = arguments[_key];
      }
  
      var argIndex = 0;
      var message = 'Warning: ' + format.replace(/%s/g, function () {
        return args[argIndex++];
      });
      if (typeof console !== 'undefined') {
        console.warn(message);
      }
      try {
        // --- Welcome to debugging React ---
        // This error was thrown as a convenience so that you can use this stack
        // to find the callsite that caused this warning to fire.
        throw new Error(message);
      } catch (x) {}
    };
  
    lowPriorityWarning = function (condition, format) {
      if (format === undefined) {
        throw new Error('`warning(condition, format, ...args)` requires a warning ' + 'message argument');
      }
      if (!condition) {
        for (var _len2 = arguments.length, args = Array(_len2 > 2 ? _len2 - 2 : 0), _key2 = 2; _key2 < _len2; _key2++) {
          args[_key2 - 2] = arguments[_key2];
        }
  
        printWarning$1.apply(undefined, [format].concat(args));
      }
    };
  }
  
  var lowPriorityWarning$1 = lowPriorityWarning;
  
  // isAttributeNameSafe() is currently duplicated in DOMMarkupOperations.
  // TODO: Find a better place for this.
  var VALID_ATTRIBUTE_NAME_REGEX = new RegExp('^[' + ATTRIBUTE_NAME_START_CHAR + '][' + ATTRIBUTE_NAME_CHAR + ']*$');
  var illegalAttributeNameCache = {};
  var validatedAttributeNameCache = {};
  function isAttributeNameSafe(attributeName) {
    if (validatedAttributeNameCache.hasOwnProperty(attributeName)) {
      return true;
    }
    if (illegalAttributeNameCache.hasOwnProperty(attributeName)) {
      return false;
    }
    if (VALID_ATTRIBUTE_NAME_REGEX.test(attributeName)) {
      validatedAttributeNameCache[attributeName] = true;
      return true;
    }
    illegalAttributeNameCache[attributeName] = true;
    {
      warning_1$1(false, 'Invalid attribute name: `%s`', attributeName);
    }
    return false;
  }
  
  // shouldIgnoreValue() is currently duplicated in DOMMarkupOperations.
  // TODO: Find a better place for this.
  function shouldIgnoreValue(propertyInfo, value) {
    return value == null || propertyInfo.hasBooleanValue && !value || propertyInfo.hasNumericValue && isNaN(value) || propertyInfo.hasPositiveNumericValue && value < 1 || propertyInfo.hasOverloadedBooleanValue && value === false;
  }
  
  /**
   * Operations for dealing with DOM properties.
   */
  
  
  
  
  
  /**
   * Get the value for a property on a node. Only used in DEV for SSR validation.
   * The "expected" argument is used as a hint of what the expected value is.
   * Some properties have multiple equivalent values.
   */
  function getValueForProperty(node, name, expected) {
    {
      var propertyInfo = getPropertyInfo(name);
      if (propertyInfo) {
        var mutationMethod = propertyInfo.mutationMethod;
        if (mutationMethod || propertyInfo.mustUseProperty) {
          return node[propertyInfo.propertyName];
        } else {
          var attributeName = propertyInfo.attributeName;
  
          var stringValue = null;
  
          if (propertyInfo.hasOverloadedBooleanValue) {
            if (node.hasAttribute(attributeName)) {
              var value = node.getAttribute(attributeName);
              if (value === '') {
                return true;
              }
              if (shouldIgnoreValue(propertyInfo, expected)) {
                return value;
              }
              if (value === '' + expected) {
                return expected;
              }
              return value;
            }
          } else if (node.hasAttribute(attributeName)) {
            if (shouldIgnoreValue(propertyInfo, expected)) {
              // We had an attribute but shouldn't have had one, so read it
              // for the error message.
              return node.getAttribute(attributeName);
            }
            if (propertyInfo.hasBooleanValue) {
              // If this was a boolean, it doesn't matter what the value is
              // the fact that we have it is the same as the expected.
              return expected;
            }
            // Even if this property uses a namespace we use getAttribute
            // because we assume its namespaced name is the same as our config.
            // To use getAttributeNS we need the local name which we don't have
            // in our config atm.
            stringValue = node.getAttribute(attributeName);
          }
  
          if (shouldIgnoreValue(propertyInfo, expected)) {
            return stringValue === null ? expected : stringValue;
          } else if (stringValue === '' + expected) {
            return expected;
          } else {
            return stringValue;
          }
        }
      }
    }
  }
  
  /**
   * Get the value for a attribute on a node. Only used in DEV for SSR validation.
   * The third argument is used as a hint of what the expected value is. Some
   * attributes have multiple equivalent values.
   */
  function getValueForAttribute(node, name, expected) {
    {
      if (!isAttributeNameSafe(name)) {
        return;
      }
      if (!node.hasAttribute(name)) {
        return expected === undefined ? undefined : null;
      }
      var value = node.getAttribute(name);
      if (value === '' + expected) {
        return expected;
      }
      return value;
    }
  }
  
  /**
   * Sets the value for a property on a node.
   *
   * @param {DOMElement} node
   * @param {string} name
   * @param {*} value
   */
  function setValueForProperty(node, name, value) {
    var propertyInfo = getPropertyInfo(name);
  
    if (propertyInfo && shouldSetAttribute(name, value)) {
      var mutationMethod = propertyInfo.mutationMethod;
      if (mutationMethod) {
        mutationMethod(node, value);
      } else if (shouldIgnoreValue(propertyInfo, value)) {
        deleteValueForProperty(node, name);
        return;
      } else if (propertyInfo.mustUseProperty) {
        // Contrary to `setAttribute`, object properties are properly
        // `toString`ed by IE8/9.
        node[propertyInfo.propertyName] = value;
      } else {
        var attributeName = propertyInfo.attributeName;
        var namespace = propertyInfo.attributeNamespace;
        // `setAttribute` with objects becomes only `[object]` in IE8/9,
        // ('' + value) makes it output the correct toString()-value.
        if (namespace) {
          node.setAttributeNS(namespace, attributeName, '' + value);
        } else if (propertyInfo.hasBooleanValue || propertyInfo.hasOverloadedBooleanValue && value === true) {
          node.setAttribute(attributeName, '');
        } else {
          node.setAttribute(attributeName, '' + value);
        }
      }
    } else {
      setValueForAttribute(node, name, shouldSetAttribute(name, value) ? value : null);
      return;
    }
  
    {
      
    }
  }
  
  function setValueForAttribute(node, name, value) {
    if (!isAttributeNameSafe(name)) {
      return;
    }
    if (value == null) {
      node.removeAttribute(name);
    } else {
      node.setAttribute(name, '' + value);
    }
  
    {
      
    }
  }
  
  /**
   * Deletes an attributes from a node.
   *
   * @param {DOMElement} node
   * @param {string} name
   */
  function deleteValueForAttribute(node, name) {
    node.removeAttribute(name);
  }
  
  /**
   * Deletes the value for a property on a node.
   *
   * @param {DOMElement} node
   * @param {string} name
   */
  function deleteValueForProperty(node, name) {
    var propertyInfo = getPropertyInfo(name);
    if (propertyInfo) {
      var mutationMethod = propertyInfo.mutationMethod;
      if (mutationMethod) {
        mutationMethod(node, undefined);
      } else if (propertyInfo.mustUseProperty) {
        var propName = propertyInfo.propertyName;
        if (propertyInfo.hasBooleanValue) {
          node[propName] = false;
        } else {
          node[propName] = '';
        }
      } else {
        node.removeAttribute(propertyInfo.attributeName);
      }
    } else {
      node.removeAttribute(name);
    }
  }
  
  var ReactControlledValuePropTypes = {
    checkPropTypes: null
  };
  
  {
    var hasReadOnlyValue = {
      button: true,
      checkbox: true,
      image: true,
      hidden: true,
      radio: true,
      reset: true,
      submit: true
    };
  
    var propTypes = {
      value: function (props, propName, componentName) {
        if (!props[propName] || hasReadOnlyValue[props.type] || props.onChange || props.readOnly || props.disabled) {
          return null;
        }
        return new Error('You provided a `value` prop to a form field without an ' + '`onChange` handler. This will render a read-only field. If ' + 'the field should be mutable use `defaultValue`. Otherwise, ' + 'set either `onChange` or `readOnly`.');
      },
      checked: function (props, propName, componentName) {
        if (!props[propName] || props.onChange || props.readOnly || props.disabled) {
          return null;
        }
        return new Error('You provided a `checked` prop to a form field without an ' + '`onChange` handler. This will render a read-only field. If ' + 'the field should be mutable use `defaultChecked`. Otherwise, ' + 'set either `onChange` or `readOnly`.');
      }
    };
  
    /**
     * Provide a linked `value` attribute for controlled forms. You should not use
     * this outside of the ReactDOM controlled form components.
     */
    ReactControlledValuePropTypes.checkPropTypes = function (tagName, props, getStack) {
      checkPropTypes_1$1(propTypes, props, 'prop', tagName, getStack);
    };
  }
  
  // TODO: direct imports like some-package/src/* are bad. Fix me.
  var getCurrentFiberOwnerName$2 = ReactDebugCurrentFiber.getCurrentFiberOwnerName;
  var getCurrentFiberStackAddendum$3 = ReactDebugCurrentFiber.getCurrentFiberStackAddendum;
  
  var didWarnValueDefaultValue = false;
  var didWarnCheckedDefaultChecked = false;
  var didWarnControlledToUncontrolled = false;
  var didWarnUncontrolledToControlled = false;
  
  function isControlled(props) {
    var usesChecked = props.type === 'checkbox' || props.type === 'radio';
    return usesChecked ? props.checked != null : props.value != null;
  }
  
  /**
   * Implements an <input> host component that allows setting these optional
   * props: `checked`, `value`, `defaultChecked`, and `defaultValue`.
   *
   * If `checked` or `value` are not supplied (or null/undefined), user actions
   * that affect the checked state or value will trigger updates to the element.
   *
   * If they are supplied (and not null/undefined), the rendered element will not
   * trigger updates to the element. Instead, the props must change in order for
   * the rendered element to be updated.
   *
   * The rendered element will be initialized as unchecked (or `defaultChecked`)
   * with an empty value (or `defaultValue`).
   *
   * See http://www.w3.org/TR/2012/WD-html5-20121025/the-input-element.html
   */
  
  function getHostProps(element, props) {
    var node = element;
    var value = props.value;
    var checked = props.checked;
  
    var hostProps = _assign({
      // Make sure we set .type before any other properties (setting .value
      // before .type means .value is lost in IE11 and below)
      type: undefined,
      // Make sure we set .step before .value (setting .value before .step
      // means .value is rounded on mount, based upon step precision)
      step: undefined,
      // Make sure we set .min & .max before .value (to ensure proper order
      // in corner cases such as min or max deriving from value, e.g. Issue #7170)
      min: undefined,
      max: undefined
    }, props, {
      defaultChecked: undefined,
      defaultValue: undefined,
      value: value != null ? value : node._wrapperState.initialValue,
      checked: checked != null ? checked : node._wrapperState.initialChecked
    });
  
    return hostProps;
  }
  
  function initWrapperState(element, props) {
    {
      ReactControlledValuePropTypes.checkPropTypes('input', props, getCurrentFiberStackAddendum$3);
  
      if (props.checked !== undefined && props.defaultChecked !== undefined && !didWarnCheckedDefaultChecked) {
        warning_1$1(false, '%s contains an input of type %s with both checked and defaultChecked props. ' + 'Input elements must be either controlled or uncontrolled ' + '(specify either the checked prop, or the defaultChecked prop, but not ' + 'both). Decide between using a controlled or uncontrolled input ' + 'element and remove one of these props. More info: ' + 'https://fb.me/react-controlled-components', getCurrentFiberOwnerName$2() || 'A component', props.type);
        didWarnCheckedDefaultChecked = true;
      }
      if (props.value !== undefined && props.defaultValue !== undefined && !didWarnValueDefaultValue) {
        warning_1$1(false, '%s contains an input of type %s with both value and defaultValue props. ' + 'Input elements must be either controlled or uncontrolled ' + '(specify either the value prop, or the defaultValue prop, but not ' + 'both). Decide between using a controlled or uncontrolled input ' + 'element and remove one of these props. More info: ' + 'https://fb.me/react-controlled-components', getCurrentFiberOwnerName$2() || 'A component', props.type);
        didWarnValueDefaultValue = true;
      }
    }
  
    var defaultValue = props.defaultValue;
    var node = element;
    node._wrapperState = {
      initialChecked: props.checked != null ? props.checked : props.defaultChecked,
      initialValue: props.value != null ? props.value : defaultValue,
      controlled: isControlled(props)
    };
  }
  
  function updateWrapper(element, props) {
    var node = element;
    {
      var controlled = isControlled(props);
  
      if (!node._wrapperState.controlled && controlled && !didWarnUncontrolledToControlled) {
        warning_1$1(false, 'A component is changing an uncontrolled input of type %s to be controlled. ' + 'Input elements should not switch from uncontrolled to controlled (or vice versa). ' + 'Decide between using a controlled or uncontrolled input ' + 'element for the lifetime of the component. More info: https://fb.me/react-controlled-components%s', props.type, getCurrentFiberStackAddendum$3());
        didWarnUncontrolledToControlled = true;
      }
      if (node._wrapperState.controlled && !controlled && !didWarnControlledToUncontrolled) {
        warning_1$1(false, 'A component is changing a controlled input of type %s to be uncontrolled. ' + 'Input elements should not switch from controlled to uncontrolled (or vice versa). ' + 'Decide between using a controlled or uncontrolled input ' + 'element for the lifetime of the component. More info: https://fb.me/react-controlled-components%s', props.type, getCurrentFiberStackAddendum$3());
        didWarnControlledToUncontrolled = true;
      }
    }
  
    var checked = props.checked;
    if (checked != null) {
      setValueForProperty(node, 'checked', checked || false);
    }
  
    var value = props.value;
    if (value != null) {
      if (value === 0 && node.value === '') {
        node.value = '0';
        // Note: IE9 reports a number inputs as 'text', so check props instead.
      } else if (props.type === 'number') {
        // Simulate `input.valueAsNumber`. IE9 does not support it
        var valueAsNumber = parseFloat(node.value) || 0;
  
        if (
        // eslint-disable-next-line
        value != valueAsNumber ||
        // eslint-disable-next-line
        value == valueAsNumber && node.value != value) {
          // Cast `value` to a string to ensure the value is set correctly. While
          // browsers typically do this as necessary, jsdom doesn't.
          node.value = '' + value;
        }
      } else if (node.value !== '' + value) {
        // Cast `value` to a string to ensure the value is set correctly. While
        // browsers typically do this as necessary, jsdom doesn't.
        node.value = '' + value;
      }
    } else {
      if (props.value == null && props.defaultValue != null) {
        // In Chrome, assigning defaultValue to certain input types triggers input validation.
        // For number inputs, the display value loses trailing decimal points. For email inputs,
        // Chrome raises "The specified value <x> is not a valid email address".
        //
        // Here we check to see if the defaultValue has actually changed, avoiding these problems
        // when the user is inputting text
        //
        // https://github.com/facebook/react/issues/7253
        if (node.defaultValue !== '' + props.defaultValue) {
          node.defaultValue = '' + props.defaultValue;
        }
      }
      if (props.checked == null && props.defaultChecked != null) {
        node.defaultChecked = !!props.defaultChecked;
      }
    }
  }
  
  function postMountWrapper(element, props) {
    var node = element;
  
    // Detach value from defaultValue. We won't do anything if we're working on
    // submit or reset inputs as those values & defaultValues are linked. They
    // are not resetable nodes so this operation doesn't matter and actually
    // removes browser-default values (eg "Submit Query") when no value is
    // provided.
  
    switch (props.type) {
      case 'submit':
      case 'reset':
        break;
      case 'color':
      case 'date':
      case 'datetime':
      case 'datetime-local':
      case 'month':
      case 'time':
      case 'week':
        // This fixes the no-show issue on iOS Safari and Android Chrome:
        // https://github.com/facebook/react/issues/7233
        node.value = '';
        node.value = node.defaultValue;
        break;
      default:
        node.value = node.value;
        break;
    }
  
    // Normally, we'd just do `node.checked = node.checked` upon initial mount, less this bug
    // this is needed to work around a chrome bug where setting defaultChecked
    // will sometimes influence the value of checked (even after detachment).
    // Reference: https://bugs.chromium.org/p/chromium/issues/detail?id=608416
    // We need to temporarily unset name to avoid disrupting radio button groups.
    var name = node.name;
    if (name !== '') {
      node.name = '';
    }
    node.defaultChecked = !node.defaultChecked;
    node.defaultChecked = !node.defaultChecked;
    if (name !== '') {
      node.name = name;
    }
  }
  
  function restoreControlledState$1(element, props) {
    var node = element;
    updateWrapper(node, props);
    updateNamedCousins(node, props);
  }
  
  function updateNamedCousins(rootNode, props) {
    var name = props.name;
    if (props.type === 'radio' && name != null) {
      var queryRoot = rootNode;
  
      while (queryRoot.parentNode) {
        queryRoot = queryRoot.parentNode;
      }
  
      // If `rootNode.form` was non-null, then we could try `form.elements`,
      // but that sometimes behaves strangely in IE8. We could also try using
      // `form.getElementsByName`, but that will only return direct children
      // and won't include inputs that use the HTML5 `form=` attribute. Since
      // the input might not even be in a form. It might not even be in the
      // document. Let's just use the local `querySelectorAll` to ensure we don't
      // miss anything.
      var group = queryRoot.querySelectorAll('input[name=' + JSON.stringify('' + name) + '][type="radio"]');
  
      for (var i = 0; i < group.length; i++) {
        var otherNode = group[i];
        if (otherNode === rootNode || otherNode.form !== rootNode.form) {
          continue;
        }
        // This will throw if radio buttons rendered by different copies of React
        // and the same name are rendered into the same form (same as #1939).
        // That's probably okay; we don't support it just as we don't support
        // mixing React radio buttons with non-React ones.
        var otherProps = getFiberCurrentPropsFromNode$1(otherNode);
        !otherProps ? invariant_1$1(false, 'ReactDOMInput: Mixing React and non-React radio inputs with the same `name` is not supported.') : void 0;
        // If this is a controlled radio button group, forcing the input that
        // was previously checked to update will cause it to be come re-checked
        // as appropriate.
        updateWrapper(otherNode, otherProps);
      }
    }
  }
  
  function flattenChildren(children) {
    var content = '';
  
    // Flatten children and warn if they aren't strings or numbers;
    // invalid types are ignored.
    // We can silently skip them because invalid DOM nesting warning
    // catches these cases in Fiber.
    React.Children.forEach(children, function (child) {
      if (child == null) {
        return;
      }
      if (typeof child === 'string' || typeof child === 'number') {
        content += child;
      }
    });
  
    return content;
  }
  
  /**
   * Implements an <option> host component that warns when `selected` is set.
   */
  
  function validateProps(element, props) {
    // TODO (yungsters): Remove support for `selected` in <option>.
    {
      warning_1$1(props.selected == null, 'Use the `defaultValue` or `value` props on <select> instead of ' + 'setting `selected` on <option>.');
    }
  }
  
  function postMountWrapper$1(element, props) {
    // value="" should make a value attribute (#6219)
    if (props.value != null) {
      element.setAttribute('value', props.value);
    }
  }
  
  function getHostProps$1(element, props) {
    var hostProps = _assign({ children: undefined }, props);
  
    var content = flattenChildren(props.children);
  
    if (content) {
      hostProps.children = content;
    }
  
    return hostProps;
  }
  
  // TODO: direct imports like some-package/src/* are bad. Fix me.
  var getCurrentFiberOwnerName$3 = ReactDebugCurrentFiber.getCurrentFiberOwnerName;
  var getCurrentFiberStackAddendum$4 = ReactDebugCurrentFiber.getCurrentFiberStackAddendum;
  
  
  {
    var didWarnValueDefaultValue$1 = false;
  }
  
  function getDeclarationErrorAddendum() {
    var ownerName = getCurrentFiberOwnerName$3();
    if (ownerName) {
      return '\n\nCheck the render method of `' + ownerName + '`.';
    }
    return '';
  }
  
  var valuePropNames = ['value', 'defaultValue'];
  
  /**
   * Validation function for `value` and `defaultValue`.
   */
  function checkSelectPropTypes(props) {
    ReactControlledValuePropTypes.checkPropTypes('select', props, getCurrentFiberStackAddendum$4);
  
    for (var i = 0; i < valuePropNames.length; i++) {
      var propName = valuePropNames[i];
      if (props[propName] == null) {
        continue;
      }
      var isArray = Array.isArray(props[propName]);
      if (props.multiple && !isArray) {
        warning_1$1(false, 'The `%s` prop supplied to <select> must be an array if ' + '`multiple` is true.%s', propName, getDeclarationErrorAddendum());
      } else if (!props.multiple && isArray) {
        warning_1$1(false, 'The `%s` prop supplied to <select> must be a scalar ' + 'value if `multiple` is false.%s', propName, getDeclarationErrorAddendum());
      }
    }
  }
  
  function updateOptions(node, multiple, propValue, setDefaultSelected) {
    var options = node.options;
  
    if (multiple) {
      var selectedValues = propValue;
      var selectedValue = {};
      for (var i = 0; i < selectedValues.length; i++) {
        // Prefix to avoid chaos with special keys.
        selectedValue['$' + selectedValues[i]] = true;
      }
      for (var _i = 0; _i < options.length; _i++) {
        var selected = selectedValue.hasOwnProperty('$' + options[_i].value);
        if (options[_i].selected !== selected) {
          options[_i].selected = selected;
        }
        if (selected && setDefaultSelected) {
          options[_i].defaultSelected = true;
        }
      }
    } else {
      // Do not set `select.value` as exact behavior isn't consistent across all
      // browsers for all cases.
      var _selectedValue = '' + propValue;
      var defaultSelected = null;
      for (var _i2 = 0; _i2 < options.length; _i2++) {
        if (options[_i2].value === _selectedValue) {
          options[_i2].selected = true;
          if (setDefaultSelected) {
            options[_i2].defaultSelected = true;
          }
          return;
        }
        if (defaultSelected === null && !options[_i2].disabled) {
          defaultSelected = options[_i2];
        }
      }
      if (defaultSelected !== null) {
        defaultSelected.selected = true;
      }
    }
  }
  
  /**
   * Implements a <select> host component that allows optionally setting the
   * props `value` and `defaultValue`. If `multiple` is false, the prop must be a
   * stringable. If `multiple` is true, the prop must be an array of stringables.
   *
   * If `value` is not supplied (or null/undefined), user actions that change the
   * selected option will trigger updates to the rendered options.
   *
   * If it is supplied (and not null/undefined), the rendered options will not
   * update in response to user actions. Instead, the `value` prop must change in
   * order for the rendered options to update.
   *
   * If `defaultValue` is provided, any options with the supplied values will be
   * selected.
   */
  
  function getHostProps$2(element, props) {
    return _assign({}, props, {
      value: undefined
    });
  }
  
  function initWrapperState$1(element, props) {
    var node = element;
    {
      checkSelectPropTypes(props);
    }
  
    var value = props.value;
    node._wrapperState = {
      initialValue: value != null ? value : props.defaultValue,
      wasMultiple: !!props.multiple
    };
  
    {
      if (props.value !== undefined && props.defaultValue !== undefined && !didWarnValueDefaultValue$1) {
        warning_1$1(false, 'Select elements must be either controlled or uncontrolled ' + '(specify either the value prop, or the defaultValue prop, but not ' + 'both). Decide between using a controlled or uncontrolled select ' + 'element and remove one of these props. More info: ' + 'https://fb.me/react-controlled-components');
        didWarnValueDefaultValue$1 = true;
      }
    }
  }
  
  function postMountWrapper$2(element, props) {
    var node = element;
    node.multiple = !!props.multiple;
    var value = props.value;
    if (value != null) {
      updateOptions(node, !!props.multiple, value, false);
    } else if (props.defaultValue != null) {
      updateOptions(node, !!props.multiple, props.defaultValue, true);
    }
  }
  
  function postUpdateWrapper(element, props) {
    var node = element;
    // After the initial mount, we control selected-ness manually so don't pass
    // this value down
    node._wrapperState.initialValue = undefined;
  
    var wasMultiple = node._wrapperState.wasMultiple;
    node._wrapperState.wasMultiple = !!props.multiple;
  
    var value = props.value;
    if (value != null) {
      updateOptions(node, !!props.multiple, value, false);
    } else if (wasMultiple !== !!props.multiple) {
      // For simplicity, reapply `defaultValue` if `multiple` is toggled.
      if (props.defaultValue != null) {
        updateOptions(node, !!props.multiple, props.defaultValue, true);
      } else {
        // Revert the select back to its default unselected state.
        updateOptions(node, !!props.multiple, props.multiple ? [] : '', false);
      }
    }
  }
  
  function restoreControlledState$2(element, props) {
    var node = element;
    var value = props.value;
  
    if (value != null) {
      updateOptions(node, !!props.multiple, value, false);
    }
  }
  
  // TODO: direct imports like some-package/src/* are bad. Fix me.
  var getCurrentFiberStackAddendum$5 = ReactDebugCurrentFiber.getCurrentFiberStackAddendum;
  
  var didWarnValDefaultVal = false;
  
  /**
   * Implements a <textarea> host component that allows setting `value`, and
   * `defaultValue`. This differs from the traditional DOM API because value is
   * usually set as PCDATA children.
   *
   * If `value` is not supplied (or null/undefined), user actions that affect the
   * value will trigger updates to the element.
   *
   * If `value` is supplied (and not null/undefined), the rendered element will
   * not trigger updates to the element. Instead, the `value` prop must change in
   * order for the rendered element to be updated.
   *
   * The rendered element will be initialized with an empty value, the prop
   * `defaultValue` if specified, or the children content (deprecated).
   */
  
  function getHostProps$3(element, props) {
    var node = element;
    !(props.dangerouslySetInnerHTML == null) ? invariant_1$1(false, '`dangerouslySetInnerHTML` does not make sense on <textarea>.') : void 0;
  
    // Always set children to the same thing. In IE9, the selection range will
    // get reset if `textContent` is mutated.  We could add a check in setTextContent
    // to only set the value if/when the value differs from the node value (which would
    // completely solve this IE9 bug), but Sebastian+Sophie seemed to like this
    // solution. The value can be a boolean or object so that's why it's forced
    // to be a string.
    var hostProps = _assign({}, props, {
      value: undefined,
      defaultValue: undefined,
      children: '' + node._wrapperState.initialValue
    });
  
    return hostProps;
  }
  
  function initWrapperState$2(element, props) {
    var node = element;
    {
      ReactControlledValuePropTypes.checkPropTypes('textarea', props, getCurrentFiberStackAddendum$5);
      if (props.value !== undefined && props.defaultValue !== undefined && !didWarnValDefaultVal) {
        warning_1$1(false, 'Textarea elements must be either controlled or uncontrolled ' + '(specify either the value prop, or the defaultValue prop, but not ' + 'both). Decide between using a controlled or uncontrolled textarea ' + 'and remove one of these props. More info: ' + 'https://fb.me/react-controlled-components');
        didWarnValDefaultVal = true;
      }
    }
  
    var value = props.value;
    var initialValue = value;
  
    // Only bother fetching default value if we're going to use it
    if (value == null) {
      var defaultValue = props.defaultValue;
      // TODO (yungsters): Remove support for children content in <textarea>.
      var children = props.children;
      if (children != null) {
        {
          warning_1$1(false, 'Use the `defaultValue` or `value` props instead of setting ' + 'children on <textarea>.');
        }
        !(defaultValue == null) ? invariant_1$1(false, 'If you supply `defaultValue` on a <textarea>, do not pass children.') : void 0;
        if (Array.isArray(children)) {
          !(children.length <= 1) ? invariant_1$1(false, '<textarea> can only have at most one child.') : void 0;
          children = children[0];
        }
  
        defaultValue = '' + children;
      }
      if (defaultValue == null) {
        defaultValue = '';
      }
      initialValue = defaultValue;
    }
  
    node._wrapperState = {
      initialValue: '' + initialValue
    };
  }
  
  function updateWrapper$1(element, props) {
    var node = element;
    var value = props.value;
    if (value != null) {
      // Cast `value` to a string to ensure the value is set correctly. While
      // browsers typically do this as necessary, jsdom doesn't.
      var newValue = '' + value;
  
      // To avoid side effects (such as losing text selection), only set value if changed
      if (newValue !== node.value) {
        node.value = newValue;
      }
      if (props.defaultValue == null) {
        node.defaultValue = newValue;
      }
    }
    if (props.defaultValue != null) {
      node.defaultValue = props.defaultValue;
    }
  }
  
  function postMountWrapper$3(element, props) {
    var node = element;
    // This is in postMount because we need access to the DOM node, which is not
    // available until after the component has mounted.
    var textContent = node.textContent;
  
    // Only set node.value if textContent is equal to the expected
    // initial value. In IE10/IE11 there is a bug where the placeholder attribute
    // will populate textContent as well.
    // https://developer.microsoft.com/microsoft-edge/platform/issues/101525/
    if (textContent === node._wrapperState.initialValue) {
      node.value = textContent;
    }
  }
  
  function restoreControlledState$3(element, props) {
    // DOM component is still mounted; update
    updateWrapper$1(element, props);
  }
  
  var HTML_NAMESPACE$1 = 'http://www.w3.org/1999/xhtml';
  var MATH_NAMESPACE = 'http://www.w3.org/1998/Math/MathML';
  var SVG_NAMESPACE = 'http://www.w3.org/2000/svg';
  
  var Namespaces = {
    html: HTML_NAMESPACE$1,
    mathml: MATH_NAMESPACE,
    svg: SVG_NAMESPACE
  };
  
  // Assumes there is no parent namespace.
  function getIntrinsicNamespace(type) {
    switch (type) {
      case 'svg':
        return SVG_NAMESPACE;
      case 'math':
        return MATH_NAMESPACE;
      default:
        return HTML_NAMESPACE$1;
    }
  }
  
  function getChildNamespace(parentNamespace, type) {
    if (parentNamespace == null || parentNamespace === HTML_NAMESPACE$1) {
      // No (or default) parent namespace: potential entry point.
      return getIntrinsicNamespace(type);
    }
    if (parentNamespace === SVG_NAMESPACE && type === 'foreignObject') {
      // We're leaving SVG.
      return HTML_NAMESPACE$1;
    }
    // By default, pass namespace below.
    return parentNamespace;
  }
  
  /* globals MSApp */
  
  /**
   * Create a function which has 'unsafe' privileges (required by windows8 apps)
   */
  var createMicrosoftUnsafeLocalFunction = function (func) {
    if (typeof MSApp !== 'undefined' && MSApp.execUnsafeLocalFunction) {
      return function (arg0, arg1, arg2, arg3) {
        MSApp.execUnsafeLocalFunction(function () {
          return func(arg0, arg1, arg2, arg3);
        });
      };
    } else {
      return func;
    }
  };
  
  // SVG temp container for IE lacking innerHTML
  var reusableSVGContainer = void 0;
  
  /**
   * Set the innerHTML property of a node
   *
   * @param {DOMElement} node
   * @param {string} html
   * @internal
   */
  var setInnerHTML = createMicrosoftUnsafeLocalFunction(function (node, html) {
    // IE does not have innerHTML for SVG nodes, so instead we inject the
    // new markup in a temp node and then move the child nodes across into
    // the target node
  
    if (node.namespaceURI === Namespaces.svg && !('innerHTML' in node)) {
      reusableSVGContainer = reusableSVGContainer || document.createElement('div');
      reusableSVGContainer.innerHTML = '<svg>' + html + '</svg>';
      var svgNode = reusableSVGContainer.firstChild;
      while (node.firstChild) {
        node.removeChild(node.firstChild);
      }
      while (svgNode.firstChild) {
        node.appendChild(svgNode.firstChild);
      }
    } else {
      node.innerHTML = html;
    }
  });
  
  // code copied and modified from escape-html
  /**
   * Module variables.
   * @private
   */
  
  var matchHtmlRegExp = /["'&<>]/;
  
  /**
   * Escape special characters in the given string of html.
   *
   * @param  {string} string The string to escape for inserting into HTML
   * @return {string}
   * @public
   */
  
  function escapeHtml(string) {
    var str = '' + string;
    var match = matchHtmlRegExp.exec(str);
  
    if (!match) {
      return str;
    }
  
    var escape;
    var html = '';
    var index = 0;
    var lastIndex = 0;
  
    for (index = match.index; index < str.length; index++) {
      switch (str.charCodeAt(index)) {
        case 34:
          // "
          escape = '&quot;';
          break;
        case 38:
          // &
          escape = '&amp;';
          break;
        case 39:
          // '
          escape = '&#x27;'; // modified from escape-html; used to be '&#39'
          break;
        case 60:
          // <
          escape = '&lt;';
          break;
        case 62:
          // >
          escape = '&gt;';
          break;
        default:
          continue;
      }
  
      if (lastIndex !== index) {
        html += str.substring(lastIndex, index);
      }
  
      lastIndex = index + 1;
      html += escape;
    }
  
    return lastIndex !== index ? html + str.substring(lastIndex, index) : html;
  }
  // end code copied and modified from escape-html
  
  /**
   * Escapes text to prevent scripting attacks.
   *
   * @param {*} text Text value to escape.
   * @return {string} An escaped string.
   */
  function escapeTextContentForBrowser(text) {
    if (typeof text === 'boolean' || typeof text === 'number') {
      // this shortcircuit helps perf for types that we know will never have
      // special characters, especially given that this function is used often
      // for numeric dom ids.
      return '' + text;
    }
    return escapeHtml(text);
  }
  
  /**
   * Set the textContent property of a node, ensuring that whitespace is preserved
   * even in IE8. innerText is a poor substitute for textContent and, among many
   * issues, inserts <br> instead of the literal newline chars. innerHTML behaves
   * as it should.
   *
   * @param {DOMElement} node
   * @param {string} text
   * @internal
   */
  var setTextContent = function (node, text) {
    if (text) {
      var firstChild = node.firstChild;
  
      if (firstChild && firstChild === node.lastChild && firstChild.nodeType === TEXT_NODE) {
        firstChild.nodeValue = text;
        return;
      }
    }
    node.textContent = text;
  };
  
  if (ExecutionEnvironment_1.canUseDOM) {
    if (!('textContent' in document.documentElement)) {
      setTextContent = function (node, text) {
        if (node.nodeType === TEXT_NODE) {
          node.nodeValue = text;
          return;
        }
        setInnerHTML(node, escapeTextContentForBrowser(text));
      };
    }
  }
  
  var setTextContent$1 = setTextContent;
  
  /**
   * CSS properties which accept numbers but are not in units of "px".
   */
  var isUnitlessNumber = {
    animationIterationCount: true,
    borderImageOutset: true,
    borderImageSlice: true,
    borderImageWidth: true,
    boxFlex: true,
    boxFlexGroup: true,
    boxOrdinalGroup: true,
    columnCount: true,
    columns: true,
    flex: true,
    flexGrow: true,
    flexPositive: true,
    flexShrink: true,
    flexNegative: true,
    flexOrder: true,
    gridRow: true,
    gridRowEnd: true,
    gridRowSpan: true,
    gridRowStart: true,
    gridColumn: true,
    gridColumnEnd: true,
    gridColumnSpan: true,
    gridColumnStart: true,
    fontWeight: true,
    lineClamp: true,
    lineHeight: true,
    opacity: true,
    order: true,
    orphans: true,
    tabSize: true,
    widows: true,
    zIndex: true,
    zoom: true,
  
    // SVG-related properties
    fillOpacity: true,
    floodOpacity: true,
    stopOpacity: true,
    strokeDasharray: true,
    strokeDashoffset: true,
    strokeMiterlimit: true,
    strokeOpacity: true,
    strokeWidth: true
  };
  
  /**
   * @param {string} prefix vendor-specific prefix, eg: Webkit
   * @param {string} key style name, eg: transitionDuration
   * @return {string} style name prefixed with `prefix`, properly camelCased, eg:
   * WebkitTransitionDuration
   */
  function prefixKey(prefix, key) {
    return prefix + key.charAt(0).toUpperCase() + key.substring(1);
  }
  
  /**
   * Support style names that may come passed in prefixed by adding permutations
   * of vendor prefixes.
   */
  var prefixes = ['Webkit', 'ms', 'Moz', 'O'];
  
  // Using Object.keys here, or else the vanilla for-in loop makes IE8 go into an
  // infinite loop, because it iterates over the newly added props too.
  Object.keys(isUnitlessNumber).forEach(function (prop) {
    prefixes.forEach(function (prefix) {
      isUnitlessNumber[prefixKey(prefix, prop)] = isUnitlessNumber[prop];
    });
  });
  
  /**
   * Convert a value into the proper css writable value. The style name `name`
   * should be logical (no hyphens), as specified
   * in `CSSProperty.isUnitlessNumber`.
   *
   * @param {string} name CSS property name such as `topMargin`.
   * @param {*} value CSS property value such as `10px`.
   * @return {string} Normalized style value with dimensions applied.
   */
  function dangerousStyleValue(name, value, isCustomProperty) {
    // Note that we've removed escapeTextForBrowser() calls here since the
    // whole string will be escaped when the attribute is injected into
    // the markup. If you provide unsafe user data here they can inject
    // arbitrary CSS which may be problematic (I couldn't repro this):
    // https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet
    // http://www.thespanner.co.uk/2007/11/26/ultimate-xss-css-injection/
    // This is not an XSS hole but instead a potential CSS injection issue
    // which has lead to a greater discussion about how we're going to
    // trust URLs moving forward. See #2115901
  
    var isEmpty = value == null || typeof value === 'boolean' || value === '';
    if (isEmpty) {
      return '';
    }
  
    if (!isCustomProperty && typeof value === 'number' && value !== 0 && !(isUnitlessNumber.hasOwnProperty(name) && isUnitlessNumber[name])) {
      return value + 'px'; // Presumes implicit 'px' suffix for unitless numbers
    }
  
    return ('' + value).trim();
  }
  
  /**
   * Copyright (c) 2013-present, Facebook, Inc.
   *
   * This source code is licensed under the MIT license found in the
   * LICENSE file in the root directory of this source tree.
   *
   * @typechecks
   */
  
  var _uppercasePattern = /([A-Z])/g;
  
  /**
   * Hyphenates a camelcased string, for example:
   *
   *   > hyphenate('backgroundColor')
   *   < "background-color"
   *
   * For CSS style names, use `hyphenateStyleName` instead which works properly
   * with all vendor prefixes, including `ms`.
   *
   * @param {string} string
   * @return {string}
   */
  function hyphenate(string) {
    return string.replace(_uppercasePattern, '-$1').toLowerCase();
  }
  
  var hyphenate_1 = hyphenate;
  
  /**
   * Copyright (c) 2013-present, Facebook, Inc.
   *
   * This source code is licensed under the MIT license found in the
   * LICENSE file in the root directory of this source tree.
   *
   * @typechecks
   */
  
  
  
  
  
  var msPattern = /^ms-/;
  
  /**
   * Hyphenates a camelcased CSS property name, for example:
   *
   *   > hyphenateStyleName('backgroundColor')
   *   < "background-color"
   *   > hyphenateStyleName('MozTransition')
   *   < "-moz-transition"
   *   > hyphenateStyleName('msTransition')
   *   < "-ms-transition"
   *
   * As Modernizr suggests (http://modernizr.com/docs/#prefixed), an `ms` prefix
   * is converted to `-ms-`.
   *
   * @param {string} string
   * @return {string}
   */
  function hyphenateStyleName(string) {
    return hyphenate_1(string).replace(msPattern, '-ms-');
  }
  
  var hyphenateStyleName_1$1 = hyphenateStyleName;
  
  /**
   * Copyright (c) 2013-present, Facebook, Inc.
   *
   * This source code is licensed under the MIT license found in the
   * LICENSE file in the root directory of this source tree.
   *
   * @typechecks
   */
  
  var _hyphenPattern = /-(.)/g;
  
  /**
   * Camelcases a hyphenated string, for example:
   *
   *   > camelize('background-color')
   *   < "backgroundColor"
   *
   * @param {string} string
   * @return {string}
   */
  function camelize(string) {
    return string.replace(_hyphenPattern, function (_, character) {
      return character.toUpperCase();
    });
  }
  
  var camelize_1 = camelize;
  
  /**
   * Copyright (c) 2013-present, Facebook, Inc.
   *
   * This source code is licensed under the MIT license found in the
   * LICENSE file in the root directory of this source tree.
   *
   * @typechecks
   */
  
  
  
  
  
  var msPattern$1 = /^-ms-/;
  
  /**
   * Camelcases a hyphenated CSS property name, for example:
   *
   *   > camelizeStyleName('background-color')
   *   < "backgroundColor"
   *   > camelizeStyleName('-moz-transition')
   *   < "MozTransition"
   *   > camelizeStyleName('-ms-transition')
   *   < "msTransition"
   *
   * As Andi Smith suggests
   * (http://www.andismith.com/blog/2012/02/modernizr-prefixed/), an `-ms` prefix
   * is converted to lowercase `ms`.
   *
   * @param {string} string
   * @return {string}
   */
  function camelizeStyleName(string) {
    return camelize_1(string.replace(msPattern$1, 'ms-'));
  }
  
  var camelizeStyleName_1$1 = camelizeStyleName;
  
  var warnValidStyle = emptyFunction_1;
  
  {
    // 'msTransform' is correct, but the other prefixes should be capitalized
    var badVendoredStyleNamePattern = /^(?:webkit|moz|o)[A-Z]/;
  
    // style values shouldn't contain a semicolon
    var badStyleValueWithSemicolonPattern = /;\s*$/;
  
    var warnedStyleNames = {};
    var warnedStyleValues = {};
    var warnedForNaNValue = false;
    var warnedForInfinityValue = false;
  
    var warnHyphenatedStyleName = function (name, getStack) {
      if (warnedStyleNames.hasOwnProperty(name) && warnedStyleNames[name]) {
        return;
      }
  
      warnedStyleNames[name] = true;
      warning_1$1(false, 'Unsupported style property %s. Did you mean %s?%s', name, camelizeStyleName_1$1(name), getStack());
    };
  
    var warnBadVendoredStyleName = function (name, getStack) {
      if (warnedStyleNames.hasOwnProperty(name) && warnedStyleNames[name]) {
        return;
      }
  
      warnedStyleNames[name] = true;
      warning_1$1(false, 'Unsupported vendor-prefixed style property %s. Did you mean %s?%s', name, name.charAt(0).toUpperCase() + name.slice(1), getStack());
    };
  
    var warnStyleValueWithSemicolon = function (name, value, getStack) {
      if (warnedStyleValues.hasOwnProperty(value) && warnedStyleValues[value]) {
        return;
      }
  
      warnedStyleValues[value] = true;
      warning_1$1(false, "Style property values shouldn't contain a semicolon. " + 'Try "%s: %s" instead.%s', name, value.replace(badStyleValueWithSemicolonPattern, ''), getStack());
    };
  
    var warnStyleValueIsNaN = function (name, value, getStack) {
      if (warnedForNaNValue) {
        return;
      }
  
      warnedForNaNValue = true;
      warning_1$1(false, '`NaN` is an invalid value for the `%s` css style property.%s', name, getStack());
    };
  
    var warnStyleValueIsInfinity = function (name, value, getStack) {
      if (warnedForInfinityValue) {
        return;
      }
  
      warnedForInfinityValue = true;
      warning_1$1(false, '`Infinity` is an invalid value for the `%s` css style property.%s', name, getStack());
    };
  
    warnValidStyle = function (name, value, getStack) {
      if (name.indexOf('-') > -1) {
        warnHyphenatedStyleName(name, getStack);
      } else if (badVendoredStyleNamePattern.test(name)) {
        warnBadVendoredStyleName(name, getStack);
      } else if (badStyleValueWithSemicolonPattern.test(value)) {
        warnStyleValueWithSemicolon(name, value, getStack);
      }
  
      if (typeof value === 'number') {
        if (isNaN(value)) {
          warnStyleValueIsNaN(name, value, getStack);
        } else if (!isFinite(value)) {
          warnStyleValueIsInfinity(name, value, getStack);
        }
      }
    };
  }
  
  var warnValidStyle$1 = warnValidStyle;
  
  /**
   * Operations for dealing with CSS properties.
   */
  
  /**
   * This creates a string that is expected to be equivalent to the style
   * attribute generated by server-side rendering. It by-passes warnings and
   * security checks so it's not safe to use this value for anything other than
   * comparison. It is only used in DEV for SSR validation.
   */
  function createDangerousStringForStyles(styles) {
    {
      var serialized = '';
      var delimiter = '';
      for (var styleName in styles) {
        if (!styles.hasOwnProperty(styleName)) {
          continue;
        }
        var styleValue = styles[styleName];
        if (styleValue != null) {
          var isCustomProperty = styleName.indexOf('--') === 0;
          serialized += delimiter + hyphenateStyleName_1$1(styleName) + ':';
          serialized += dangerousStyleValue(styleName, styleValue, isCustomProperty);
  
          delimiter = ';';
        }
      }
      return serialized || null;
    }
  }
  
  /**
   * Sets the value for multiple styles on a node.  If a value is specified as
   * '' (empty string), the corresponding style property will be unset.
   *
   * @param {DOMElement} node
   * @param {object} styles
   */
  function setValueForStyles(node, styles, getStack) {
    var style = node.style;
    for (var styleName in styles) {
      if (!styles.hasOwnProperty(styleName)) {
        continue;
      }
      var isCustomProperty = styleName.indexOf('--') === 0;
      {
        if (!isCustomProperty) {
          warnValidStyle$1(styleName, styles[styleName], getStack);
        }
      }
      var styleValue = dangerousStyleValue(styleName, styles[styleName], isCustomProperty);
      if (styleName === 'float') {
        styleName = 'cssFloat';
      }
      if (isCustomProperty) {
        style.setProperty(styleName, styleValue);
      } else {
        style[styleName] = styleValue;
      }
    }
  }
  
  // For HTML, certain tags should omit their close tag. We keep a whitelist for
  // those special-case tags.
  
  var omittedCloseTags = {
    area: true,
    base: true,
    br: true,
    col: true,
    embed: true,
    hr: true,
    img: true,
    input: true,
    keygen: true,
    link: true,
    meta: true,
    param: true,
    source: true,
    track: true,
    wbr: true
  };
  
  // For HTML, certain tags cannot have children. This has the same purpose as
  // `omittedCloseTags` except that `menuitem` should still have its closing tag.
  
  var voidElementTags = _assign({
    menuitem: true
  }, omittedCloseTags);
  
  var HTML$1 = '__html';
  
  function assertValidProps(tag, props, getStack) {
    if (!props) {
      return;
    }
    // Note the use of `==` which checks for null or undefined.
    if (voidElementTags[tag]) {
      !(props.children == null && props.dangerouslySetInnerHTML == null) ? invariant_1$1(false, '%s is a void element tag and must neither have `children` nor use `dangerouslySetInnerHTML`.%s', tag, getStack()) : void 0;
    }
    if (props.dangerouslySetInnerHTML != null) {
      !(props.children == null) ? invariant_1$1(false, 'Can only set one of `children` or `props.dangerouslySetInnerHTML`.') : void 0;
      !(typeof props.dangerouslySetInnerHTML === 'object' && HTML$1 in props.dangerouslySetInnerHTML) ? invariant_1$1(false, '`props.dangerouslySetInnerHTML` must be in the form `{__html: ...}`. Please visit https://fb.me/react-invariant-dangerously-set-inner-html for more information.') : void 0;
    }
    {
      warning_1$1(props.suppressContentEditableWarning || !props.contentEditable || props.children == null, 'A component is `contentEditable` and contains `children` managed by ' + 'React. It is now your responsibility to guarantee that none of ' + 'those nodes are unexpectedly modified or duplicated. This is ' + 'probably not intentional.%s', getStack());
    }
    !(props.style == null || typeof props.style === 'object') ? invariant_1$1(false, 'The `style` prop expects a mapping from style properties to values, not a string. For example, style={{marginRight: spacing + \'em\'}} when using JSX.%s', getStack()) : void 0;
  }
  
  function isCustomComponent(tagName, props) {
    if (tagName.indexOf('-') === -1) {
      return typeof props.is === 'string';
    }
    switch (tagName) {
      // These are reserved SVG and MathML elements.
      // We don't mind this whitelist too much because we expect it to never grow.
      // The alternative is to track the namespace in a few places which is convoluted.
      // https://w3c.github.io/webcomponents/spec/custom/#custom-elements-core-concepts
      case 'annotation-xml':
      case 'color-profile':
      case 'font-face':
      case 'font-face-src':
      case 'font-face-uri':
      case 'font-face-format':
      case 'font-face-name':
      case 'missing-glyph':
        return false;
      default:
        return true;
    }
  }
  
  var ariaProperties = {
    'aria-current': 0, // state
    'aria-details': 0,
    'aria-disabled': 0, // state
    'aria-hidden': 0, // state
    'aria-invalid': 0, // state
    'aria-keyshortcuts': 0,
    'aria-label': 0,
    'aria-roledescription': 0,
    // Widget Attributes
    'aria-autocomplete': 0,
    'aria-checked': 0,
    'aria-expanded': 0,
    'aria-haspopup': 0,
    'aria-level': 0,
    'aria-modal': 0,
    'aria-multiline': 0,
    'aria-multiselectable': 0,
    'aria-orientation': 0,
    'aria-placeholder': 0,
    'aria-pressed': 0,
    'aria-readonly': 0,
    'aria-required': 0,
    'aria-selected': 0,
    'aria-sort': 0,
    'aria-valuemax': 0,
    'aria-valuemin': 0,
    'aria-valuenow': 0,
    'aria-valuetext': 0,
    // Live Region Attributes
    'aria-atomic': 0,
    'aria-busy': 0,
    'aria-live': 0,
    'aria-relevant': 0,
    // Drag-and-Drop Attributes
    'aria-dropeffect': 0,
    'aria-grabbed': 0,
    // Relationship Attributes
    'aria-activedescendant': 0,
    'aria-colcount': 0,
    'aria-colindex': 0,
    'aria-colspan': 0,
    'aria-controls': 0,
    'aria-describedby': 0,
    'aria-errormessage': 0,
    'aria-flowto': 0,
    'aria-labelledby': 0,
    'aria-owns': 0,
    'aria-posinset': 0,
    'aria-rowcount': 0,
    'aria-rowindex': 0,
    'aria-rowspan': 0,
    'aria-setsize': 0
  };
  
  var warnedProperties = {};
  var rARIA = new RegExp('^(aria)-[' + ATTRIBUTE_NAME_CHAR + ']*$');
  var rARIACamel = new RegExp('^(aria)[A-Z][' + ATTRIBUTE_NAME_CHAR + ']*$');
  
  var hasOwnProperty$1 = Object.prototype.hasOwnProperty;
  
  function getStackAddendum() {
    var stack = ReactDebugCurrentFrame.getStackAddendum();
    return stack != null ? stack : '';
  }
  
  function validateProperty(tagName, name) {
    if (hasOwnProperty$1.call(warnedProperties, name) && warnedProperties[name]) {
      return true;
    }
  
    if (rARIACamel.test(name)) {
      var ariaName = 'aria-' + name.slice(4).toLowerCase();
      var correctName = ariaProperties.hasOwnProperty(ariaName) ? ariaName : null;
  
      // If this is an aria-* attribute, but is not listed in the known DOM
      // DOM properties, then it is an invalid aria-* attribute.
      if (correctName == null) {
        warning_1$1(false, 'Invalid ARIA attribute `%s`. ARIA attributes follow the pattern aria-* and must be lowercase.%s', name, getStackAddendum());
        warnedProperties[name] = true;
        return true;
      }
      // aria-* attributes should be lowercase; suggest the lowercase version.
      if (name !== correctName) {
        warning_1$1(false, 'Invalid ARIA attribute `%s`. Did you mean `%s`?%s', name, correctName, getStackAddendum());
        warnedProperties[name] = true;
        return true;
      }
    }
  
    if (rARIA.test(name)) {
      var lowerCasedName = name.toLowerCase();
      var standardName = ariaProperties.hasOwnProperty(lowerCasedName) ? lowerCasedName : null;
  
      // If this is an aria-* attribute, but is not listed in the known DOM
      // DOM properties, then it is an invalid aria-* attribute.
      if (standardName == null) {
        warnedProperties[name] = true;
        return false;
      }
      // aria-* attributes should be lowercase; suggest the lowercase version.
      if (name !== standardName) {
        warning_1$1(false, 'Unknown ARIA attribute `%s`. Did you mean `%s`?%s', name, standardName, getStackAddendum());
        warnedProperties[name] = true;
        return true;
      }
    }
  
    return true;
  }
  
  function warnInvalidARIAProps(type, props) {
    var invalidProps = [];
  
    for (var key in props) {
      var isValid = validateProperty(type, key);
      if (!isValid) {
        invalidProps.push(key);
      }
    }
  
    var unknownPropString = invalidProps.map(function (prop) {
      return '`' + prop + '`';
    }).join(', ');
  
    if (invalidProps.length === 1) {
      warning_1$1(false, 'Invalid aria prop %s on <%s> tag. ' + 'For details, see https://fb.me/invalid-aria-prop%s', unknownPropString, type, getStackAddendum());
    } else if (invalidProps.length > 1) {
      warning_1$1(false, 'Invalid aria props %s on <%s> tag. ' + 'For details, see https://fb.me/invalid-aria-prop%s', unknownPropString, type, getStackAddendum());
    }
  }
  
  function validateProperties(type, props) {
    if (isCustomComponent(type, props)) {
      return;
    }
    warnInvalidARIAProps(type, props);
  }
  
  var didWarnValueNull = false;
  
  function getStackAddendum$1() {
    var stack = ReactDebugCurrentFrame.getStackAddendum();
    return stack != null ? stack : '';
  }
  
  function validateProperties$1(type, props) {
    if (type !== 'input' && type !== 'textarea' && type !== 'select') {
      return;
    }
  
    if (props != null && props.value === null && !didWarnValueNull) {
      didWarnValueNull = true;
      if (type === 'select' && props.multiple) {
        warning_1$1(false, '`value` prop on `%s` should not be null. ' + 'Consider using an empty array when `multiple` is set to `true` ' + 'to clear the component or `undefined` for uncontrolled components.%s', type, getStackAddendum$1());
      } else {
        warning_1$1(false, '`value` prop on `%s` should not be null. ' + 'Consider using an empty string to clear the component or `undefined` ' + 'for uncontrolled components.%s', type, getStackAddendum$1());
      }
    }
  }
  
  // When adding attributes to the HTML or SVG whitelist, be sure to
  // also add them to this module to ensure casing and incorrect name
  // warnings.
  var possibleStandardNames = {
    // HTML
    accept: 'accept',
    acceptcharset: 'acceptCharset',
    'accept-charset': 'acceptCharset',
    accesskey: 'accessKey',
    action: 'action',
    allowfullscreen: 'allowFullScreen',
    alt: 'alt',
    as: 'as',
    async: 'async',
    autocapitalize: 'autoCapitalize',
    autocomplete: 'autoComplete',
    autocorrect: 'autoCorrect',
    autofocus: 'autoFocus',
    autoplay: 'autoPlay',
    autosave: 'autoSave',
    capture: 'capture',
    cellpadding: 'cellPadding',
    cellspacing: 'cellSpacing',
    challenge: 'challenge',
    charset: 'charSet',
    checked: 'checked',
    children: 'children',
    cite: 'cite',
    'class': 'className',
    classid: 'classID',
    classname: 'className',
    cols: 'cols',
    colspan: 'colSpan',
    content: 'content',
    contenteditable: 'contentEditable',
    contextmenu: 'contextMenu',
    controls: 'controls',
    controlslist: 'controlsList',
    coords: 'coords',
    crossorigin: 'crossOrigin',
    dangerouslysetinnerhtml: 'dangerouslySetInnerHTML',
    data: 'data',
    datetime: 'dateTime',
    'default': 'default',
    defaultchecked: 'defaultChecked',
    defaultvalue: 'defaultValue',
    defer: 'defer',
    dir: 'dir',
    disabled: 'disabled',
    download: 'download',
    draggable: 'draggable',
    enctype: 'encType',
    'for': 'htmlFor',
    form: 'form',
    formmethod: 'formMethod',
    formaction: 'formAction',
    formenctype: 'formEncType',
    formnovalidate: 'formNoValidate',
    formtarget: 'formTarget',
    frameborder: 'frameBorder',
    headers: 'headers',
    height: 'height',
    hidden: 'hidden',
    high: 'high',
    href: 'href',
    hreflang: 'hrefLang',
    htmlfor: 'htmlFor',
    httpequiv: 'httpEquiv',
    'http-equiv': 'httpEquiv',
    icon: 'icon',
    id: 'id',
    innerhtml: 'innerHTML',
    inputmode: 'inputMode',
    integrity: 'integrity',
    is: 'is',
    itemid: 'itemID',
    itemprop: 'itemProp',
    itemref: 'itemRef',
    itemscope: 'itemScope',
    itemtype: 'itemType',
    keyparams: 'keyParams',
    keytype: 'keyType',
    kind: 'kind',
    label: 'label',
    lang: 'lang',
    list: 'list',
    loop: 'loop',
    low: 'low',
    manifest: 'manifest',
    marginwidth: 'marginWidth',
    marginheight: 'marginHeight',
    max: 'max',
    maxlength: 'maxLength',
    media: 'media',
    mediagroup: 'mediaGroup',
    method: 'method',
    min: 'min',
    minlength: 'minLength',
    multiple: 'multiple',
    muted: 'muted',
    name: 'name',
    nonce: 'nonce',
    novalidate: 'noValidate',
    open: 'open',
    optimum: 'optimum',
    pattern: 'pattern',
    placeholder: 'placeholder',
    playsinline: 'playsInline',
    poster: 'poster',
    preload: 'preload',
    profile: 'profile',
    radiogroup: 'radioGroup',
    readonly: 'readOnly',
    referrerpolicy: 'referrerPolicy',
    rel: 'rel',
    required: 'required',
    reversed: 'reversed',
    role: 'role',
    rows: 'rows',
    rowspan: 'rowSpan',
    sandbox: 'sandbox',
    scope: 'scope',
    scoped: 'scoped',
    scrolling: 'scrolling',
    seamless: 'seamless',
    selected: 'selected',
    shape: 'shape',
    size: 'size',
    sizes: 'sizes',
    span: 'span',
    spellcheck: 'spellCheck',
    src: 'src',
    srcdoc: 'srcDoc',
    srclang: 'srcLang',
    srcset: 'srcSet',
    start: 'start',
    step: 'step',
    style: 'style',
    summary: 'summary',
    tabindex: 'tabIndex',
    target: 'target',
    title: 'title',
    type: 'type',
    usemap: 'useMap',
    value: 'value',
    width: 'width',
    wmode: 'wmode',
    wrap: 'wrap',
  
    // SVG
    about: 'about',
    accentheight: 'accentHeight',
    'accent-height': 'accentHeight',
    accumulate: 'accumulate',
    additive: 'additive',
    alignmentbaseline: 'alignmentBaseline',
    'alignment-baseline': 'alignmentBaseline',
    allowreorder: 'allowReorder',
    alphabetic: 'alphabetic',
    amplitude: 'amplitude',
    arabicform: 'arabicForm',
    'arabic-form': 'arabicForm',
    ascent: 'ascent',
    attributename: 'attributeName',
    attributetype: 'attributeType',
    autoreverse: 'autoReverse',
    azimuth: 'azimuth',
    basefrequency: 'baseFrequency',
    baselineshift: 'baselineShift',
    'baseline-shift': 'baselineShift',
    baseprofile: 'baseProfile',
    bbox: 'bbox',
    begin: 'begin',
    bias: 'bias',
    by: 'by',
    calcmode: 'calcMode',
    capheight: 'capHeight',
    'cap-height': 'capHeight',
    clip: 'clip',
    clippath: 'clipPath',
    'clip-path': 'clipPath',
    clippathunits: 'clipPathUnits',
    cliprule: 'clipRule',
    'clip-rule': 'clipRule',
    color: 'color',
    colorinterpolation: 'colorInterpolation',
    'color-interpolation': 'colorInterpolation',
    colorinterpolationfilters: 'colorInterpolationFilters',
    'color-interpolation-filters': 'colorInterpolationFilters',
    colorprofile: 'colorProfile',
    'color-profile': 'colorProfile',
    colorrendering: 'colorRendering',
    'color-rendering': 'colorRendering',
    contentscripttype: 'contentScriptType',
    contentstyletype: 'contentStyleType',
    cursor: 'cursor',
    cx: 'cx',
    cy: 'cy',
    d: 'd',
    datatype: 'datatype',
    decelerate: 'decelerate',
    descent: 'descent',
    diffuseconstant: 'diffuseConstant',
    direction: 'direction',
    display: 'display',
    divisor: 'divisor',
    dominantbaseline: 'dominantBaseline',
    'dominant-baseline': 'dominantBaseline',
    dur: 'dur',
    dx: 'dx',
    dy: 'dy',
    edgemode: 'edgeMode',
    elevation: 'elevation',
    enablebackground: 'enableBackground',
    'enable-background': 'enableBackground',
    end: 'end',
    exponent: 'exponent',
    externalresourcesrequired: 'externalResourcesRequired',
    fill: 'fill',
    fillopacity: 'fillOpacity',
    'fill-opacity': 'fillOpacity',
    fillrule: 'fillRule',
    'fill-rule': 'fillRule',
    filter: 'filter',
    filterres: 'filterRes',
    filterunits: 'filterUnits',
    floodopacity: 'floodOpacity',
    'flood-opacity': 'floodOpacity',
    floodcolor: 'floodColor',
    'flood-color': 'floodColor',
    focusable: 'focusable',
    fontfamily: 'fontFamily',
    'font-family': 'fontFamily',
    fontsize: 'fontSize',
    'font-size': 'fontSize',
    fontsizeadjust: 'fontSizeAdjust',
    'font-size-adjust': 'fontSizeAdjust',
    fontstretch: 'fontStretch',
    'font-stretch': 'fontStretch',
    fontstyle: 'fontStyle',
    'font-style': 'fontStyle',
    fontvariant: 'fontVariant',
    'font-variant': 'fontVariant',
    fontweight: 'fontWeight',
    'font-weight': 'fontWeight',
    format: 'format',
    from: 'from',
    fx: 'fx',
    fy: 'fy',
    g1: 'g1',
    g2: 'g2',
    glyphname: 'glyphName',
    'glyph-name': 'glyphName',
    glyphorientationhorizontal: 'glyphOrientationHorizontal',
    'glyph-orientation-horizontal': 'glyphOrientationHorizontal',
    glyphorientationvertical: 'glyphOrientationVertical',
    'glyph-orientation-vertical': 'glyphOrientationVertical',
    glyphref: 'glyphRef',
    gradienttransform: 'gradientTransform',
    gradientunits: 'gradientUnits',
    hanging: 'hanging',
    horizadvx: 'horizAdvX',
    'horiz-adv-x': 'horizAdvX',
    horizoriginx: 'horizOriginX',
    'horiz-origin-x': 'horizOriginX',
    ideographic: 'ideographic',
    imagerendering: 'imageRendering',
    'image-rendering': 'imageRendering',
    in2: 'in2',
    'in': 'in',
    inlist: 'inlist',
    intercept: 'intercept',
    k1: 'k1',
    k2: 'k2',
    k3: 'k3',
    k4: 'k4',
    k: 'k',
    kernelmatrix: 'kernelMatrix',
    kernelunitlength: 'kernelUnitLength',
    kerning: 'kerning',
    keypoints: 'keyPoints',
    keysplines: 'keySplines',
    keytimes: 'keyTimes',
    lengthadjust: 'lengthAdjust',
    letterspacing: 'letterSpacing',
    'letter-spacing': 'letterSpacing',
    lightingcolor: 'lightingColor',
    'lighting-color': 'lightingColor',
    limitingconeangle: 'limitingConeAngle',
    local: 'local',
    markerend: 'markerEnd',
    'marker-end': 'markerEnd',
    markerheight: 'markerHeight',
    markermid: 'markerMid',
    'marker-mid': 'markerMid',
    markerstart: 'markerStart',
    'marker-start': 'markerStart',
    markerunits: 'markerUnits',
    markerwidth: 'markerWidth',
    mask: 'mask',
    maskcontentunits: 'maskContentUnits',
    maskunits: 'maskUnits',
    mathematical: 'mathematical',
    mode: 'mode',
    numoctaves: 'numOctaves',
    offset: 'offset',
    opacity: 'opacity',
    operator: 'operator',
    order: 'order',
    orient: 'orient',
    orientation: 'orientation',
    origin: 'origin',
    overflow: 'overflow',
    overlineposition: 'overlinePosition',
    'overline-position': 'overlinePosition',
    overlinethickness: 'overlineThickness',
    'overline-thickness': 'overlineThickness',
    paintorder: 'paintOrder',
    'paint-order': 'paintOrder',
    panose1: 'panose1',
    'panose-1': 'panose1',
    pathlength: 'pathLength',
    patterncontentunits: 'patternContentUnits',
    patterntransform: 'patternTransform',
    patternunits: 'patternUnits',
    pointerevents: 'pointerEvents',
    'pointer-events': 'pointerEvents',
    points: 'points',
    pointsatx: 'pointsAtX',
    pointsaty: 'pointsAtY',
    pointsatz: 'pointsAtZ',
    prefix: 'prefix',
    preservealpha: 'preserveAlpha',
    preserveaspectratio: 'preserveAspectRatio',
    primitiveunits: 'primitiveUnits',
    property: 'property',
    r: 'r',
    radius: 'radius',
    refx: 'refX',
    refy: 'refY',
    renderingintent: 'renderingIntent',
    'rendering-intent': 'renderingIntent',
    repeatcount: 'repeatCount',
    repeatdur: 'repeatDur',
    requiredextensions: 'requiredExtensions',
    requiredfeatures: 'requiredFeatures',
    resource: 'resource',
    restart: 'restart',
    result: 'result',
    results: 'results',
    rotate: 'rotate',
    rx: 'rx',
    ry: 'ry',
    scale: 'scale',
    security: 'security',
    seed: 'seed',
    shaperendering: 'shapeRendering',
    'shape-rendering': 'shapeRendering',
    slope: 'slope',
    spacing: 'spacing',
    specularconstant: 'specularConstant',
    specularexponent: 'specularExponent',
    speed: 'speed',
    spreadmethod: 'spreadMethod',
    startoffset: 'startOffset',
    stddeviation: 'stdDeviation',
    stemh: 'stemh',
    stemv: 'stemv',
    stitchtiles: 'stitchTiles',
    stopcolor: 'stopColor',
    'stop-color': 'stopColor',
    stopopacity: 'stopOpacity',
    'stop-opacity': 'stopOpacity',
    strikethroughposition: 'strikethroughPosition',
    'strikethrough-position': 'strikethroughPosition',
    strikethroughthickness: 'strikethroughThickness',
    'strikethrough-thickness': 'strikethroughThickness',
    string: 'string',
    stroke: 'stroke',
    strokedasharray: 'strokeDasharray',
    'stroke-dasharray': 'strokeDasharray',
    strokedashoffset: 'strokeDashoffset',
    'stroke-dashoffset': 'strokeDashoffset',
    strokelinecap: 'strokeLinecap',
    'stroke-linecap': 'strokeLinecap',
    strokelinejoin: 'strokeLinejoin',
    'stroke-linejoin': 'strokeLinejoin',
    strokemiterlimit: 'strokeMiterlimit',
    'stroke-miterlimit': 'strokeMiterlimit',
    strokewidth: 'strokeWidth',
    'stroke-width': 'strokeWidth',
    strokeopacity: 'strokeOpacity',
    'stroke-opacity': 'strokeOpacity',
    suppresscontenteditablewarning: 'suppressContentEditableWarning',
    suppresshydrationwarning: 'suppressHydrationWarning',
    surfacescale: 'surfaceScale',
    systemlanguage: 'systemLanguage',
    tablevalues: 'tableValues',
    targetx: 'targetX',
    targety: 'targetY',
    textanchor: 'textAnchor',
    'text-anchor': 'textAnchor',
    textdecoration: 'textDecoration',
    'text-decoration': 'textDecoration',
    textlength: 'textLength',
    textrendering: 'textRendering',
    'text-rendering': 'textRendering',
    to: 'to',
    transform: 'transform',
    'typeof': 'typeof',
    u1: 'u1',
    u2: 'u2',
    underlineposition: 'underlinePosition',
    'underline-position': 'underlinePosition',
    underlinethickness: 'underlineThickness',
    'underline-thickness': 'underlineThickness',
    unicode: 'unicode',
    unicodebidi: 'unicodeBidi',
    'unicode-bidi': 'unicodeBidi',
    unicoderange: 'unicodeRange',
    'unicode-range': 'unicodeRange',
    unitsperem: 'unitsPerEm',
    'units-per-em': 'unitsPerEm',
    unselectable: 'unselectable',
    valphabetic: 'vAlphabetic',
    'v-alphabetic': 'vAlphabetic',
    values: 'values',
    vectoreffect: 'vectorEffect',
    'vector-effect': 'vectorEffect',
    version: 'version',
    vertadvy: 'vertAdvY',
    'vert-adv-y': 'vertAdvY',
    vertoriginx: 'vertOriginX',
    'vert-origin-x': 'vertOriginX',
    vertoriginy: 'vertOriginY',
    'vert-origin-y': 'vertOriginY',
    vhanging: 'vHanging',
    'v-hanging': 'vHanging',
    videographic: 'vIdeographic',
    'v-ideographic': 'vIdeographic',
    viewbox: 'viewBox',
    viewtarget: 'viewTarget',
    visibility: 'visibility',
    vmathematical: 'vMathematical',
    'v-mathematical': 'vMathematical',
    vocab: 'vocab',
    widths: 'widths',
    wordspacing: 'wordSpacing',
    'word-spacing': 'wordSpacing',
    writingmode: 'writingMode',
    'writing-mode': 'writingMode',
    x1: 'x1',
    x2: 'x2',
    x: 'x',
    xchannelselector: 'xChannelSelector',
    xheight: 'xHeight',
    'x-height': 'xHeight',
    xlinkactuate: 'xlinkActuate',
    'xlink:actuate': 'xlinkActuate',
    xlinkarcrole: 'xlinkArcrole',
    'xlink:arcrole': 'xlinkArcrole',
    xlinkhref: 'xlinkHref',
    'xlink:href': 'xlinkHref',
    xlinkrole: 'xlinkRole',
    'xlink:role': 'xlinkRole',
    xlinkshow: 'xlinkShow',
    'xlink:show': 'xlinkShow',
    xlinktitle: 'xlinkTitle',
    'xlink:title': 'xlinkTitle',
    xlinktype: 'xlinkType',
    'xlink:type': 'xlinkType',
    xmlbase: 'xmlBase',
    'xml:base': 'xmlBase',
    xmllang: 'xmlLang',
    'xml:lang': 'xmlLang',
    xmlns: 'xmlns',
    'xml:space': 'xmlSpace',
    xmlnsxlink: 'xmlnsXlink',
    'xmlns:xlink': 'xmlnsXlink',
    xmlspace: 'xmlSpace',
    y1: 'y1',
    y2: 'y2',
    y: 'y',
    ychannelselector: 'yChannelSelector',
    z: 'z',
    zoomandpan: 'zoomAndPan'
  };
  
  function getStackAddendum$2() {
    var stack = ReactDebugCurrentFrame.getStackAddendum();
    return stack != null ? stack : '';
  }
  
  {
    var warnedProperties$1 = {};
    var hasOwnProperty$2 = Object.prototype.hasOwnProperty;
    var EVENT_NAME_REGEX = /^on[A-Z]/;
    var rARIA$1 = new RegExp('^(aria)-[' + ATTRIBUTE_NAME_CHAR + ']*$');
    var rARIACamel$1 = new RegExp('^(aria)[A-Z][' + ATTRIBUTE_NAME_CHAR + ']*$');
  
    var validateProperty$1 = function (tagName, name, value) {
      if (hasOwnProperty$2.call(warnedProperties$1, name) && warnedProperties$1[name]) {
        return true;
      }
  
      if (registrationNameModules.hasOwnProperty(name)) {
        return true;
      }
  
      if (plugins.length === 0 && EVENT_NAME_REGEX.test(name)) {
        // If no event plugins have been injected, we might be in a server environment.
        // Don't check events in this case.
        return true;
      }
  
      var lowerCasedName = name.toLowerCase();
      var registrationName = possibleRegistrationNames.hasOwnProperty(lowerCasedName) ? possibleRegistrationNames[lowerCasedName] : null;
  
      if (registrationName != null) {
        warning_1$1(false, 'Invalid event handler property `%s`. Did you mean `%s`?%s', name, registrationName, getStackAddendum$2());
        warnedProperties$1[name] = true;
        return true;
      }
  
      if (lowerCasedName.indexOf('on') === 0 && lowerCasedName.length > 2) {
        warning_1$1(false, 'Unknown event handler property `%s`. It will be ignored.%s', name, getStackAddendum$2());
        warnedProperties$1[name] = true;
        return true;
      }
  
      // Let the ARIA attribute hook validate ARIA attributes
      if (rARIA$1.test(name) || rARIACamel$1.test(name)) {
        return true;
      }
  
      if (lowerCasedName === 'onfocusin' || lowerCasedName === 'onfocusout') {
        warning_1$1(false, 'React uses onFocus and onBlur instead of onFocusIn and onFocusOut. ' + 'All React events are normalized to bubble, so onFocusIn and onFocusOut ' + 'are not needed/supported by React.');
        warnedProperties$1[name] = true;
        return true;
      }
  
      if (lowerCasedName === 'innerhtml') {
        warning_1$1(false, 'Directly setting property `innerHTML` is not permitted. ' + 'For more information, lookup documentation on `dangerouslySetInnerHTML`.');
        warnedProperties$1[name] = true;
        return true;
      }
  
      if (lowerCasedName === 'aria') {
        warning_1$1(false, 'The `aria` attribute is reserved for future use in React. ' + 'Pass individual `aria-` attributes instead.');
        warnedProperties$1[name] = true;
        return true;
      }
  
      if (lowerCasedName === 'is' && value !== null && value !== undefined && typeof value !== 'string') {
        warning_1$1(false, 'Received a `%s` for a string attribute `is`. If this is expected, cast ' + 'the value to a string.%s', typeof value, getStackAddendum$2());
        warnedProperties$1[name] = true;
        return true;
      }
  
      if (typeof value === 'number' && isNaN(value)) {
        warning_1$1(false, 'Received NaN for the `%s` attribute. If this is expected, cast ' + 'the value to a string.%s', name, getStackAddendum$2());
        warnedProperties$1[name] = true;
        return true;
      }
  
      var isReserved = isReservedProp(name);
  
      // Known attributes should match the casing specified in the property config.
      if (possibleStandardNames.hasOwnProperty(lowerCasedName)) {
        var standardName = possibleStandardNames[lowerCasedName];
        if (standardName !== name) {
          warning_1$1(false, 'Invalid DOM property `%s`. Did you mean `%s`?%s', name, standardName, getStackAddendum$2());
          warnedProperties$1[name] = true;
          return true;
        }
      } else if (!isReserved && name !== lowerCasedName) {
        // Unknown attributes should have lowercase casing since that's how they
        // will be cased anyway with server rendering.
        warning_1$1(false, 'React does not recognize the `%s` prop on a DOM element. If you ' + 'intentionally want it to appear in the DOM as a custom ' + 'attribute, spell it as lowercase `%s` instead. ' + 'If you accidentally passed it from a parent component, remove ' + 'it from the DOM element.%s', name, lowerCasedName, getStackAddendum$2());
        warnedProperties$1[name] = true;
        return true;
      }
  
      if (typeof value === 'boolean' && !shouldAttributeAcceptBooleanValue(name)) {
        if (value) {
          warning_1$1(false, 'Received `%s` for a non-boolean attribute `%s`.\n\n' + 'If you want to write it to the DOM, pass a string instead: ' + '%s="%s" or %s={value.toString()}.%s', value, name, name, value, name, getStackAddendum$2());
        } else {
          warning_1$1(false, 'Received `%s` for a non-boolean attribute `%s`.\n\n' + 'If you want to write it to the DOM, pass a string instead: ' + '%s="%s" or %s={value.toString()}.\n\n' + 'If you used to conditionally omit it with %s={condition && value}, ' + 'pass %s={condition ? value : undefined} instead.%s', value, name, name, value, name, name, name, getStackAddendum$2());
        }
        warnedProperties$1[name] = true;
        return true;
      }
  
      // Now that we've validated casing, do not validate
      // data types for reserved props
      if (isReserved) {
        return true;
      }
  
      // Warn when a known attribute is a bad type
      if (!shouldSetAttribute(name, value)) {
        warnedProperties$1[name] = true;
        return false;
      }
  
      return true;
    };
  }
  
  var warnUnknownProperties = function (type, props) {
    var unknownProps = [];
    for (var key in props) {
      var isValid = validateProperty$1(type, key, props[key]);
      if (!isValid) {
        unknownProps.push(key);
      }
    }
  
    var unknownPropString = unknownProps.map(function (prop) {
      return '`' + prop + '`';
    }).join(', ');
    if (unknownProps.length === 1) {
      warning_1$1(false, 'Invalid value for prop %s on <%s> tag. Either remove it from the element, ' + 'or pass a string or number value to keep it in the DOM. ' + 'For details, see https://fb.me/react-attribute-behavior%s', unknownPropString, type, getStackAddendum$2());
    } else if (unknownProps.length > 1) {
      warning_1$1(false, 'Invalid values for props %s on <%s> tag. Either remove them from the element, ' + 'or pass a string or number value to keep them in the DOM. ' + 'For details, see https://fb.me/react-attribute-behavior%s', unknownPropString, type, getStackAddendum$2());
    }
  };
  
  function validateProperties$2(type, props) {
    if (isCustomComponent(type, props)) {
      return;
    }
    warnUnknownProperties(type, props);
  }
  
  // TODO: direct imports like some-package/src/* are bad. Fix me.
  var getCurrentFiberOwnerName$1 = ReactDebugCurrentFiber.getCurrentFiberOwnerName;
  var getCurrentFiberStackAddendum$2 = ReactDebugCurrentFiber.getCurrentFiberStackAddendum;
  
  var didWarnInvalidHydration = false;
  var didWarnShadyDOM = false;
  
  var DANGEROUSLY_SET_INNER_HTML = 'dangerouslySetInnerHTML';
  var SUPPRESS_CONTENT_EDITABLE_WARNING = 'suppressContentEditableWarning';
  var SUPPRESS_HYDRATION_WARNING$1 = 'suppressHydrationWarning';
  var AUTOFOCUS = 'autoFocus';
  var CHILDREN = 'children';
  var STYLE = 'style';
  var HTML = '__html';
  
  var HTML_NAMESPACE = Namespaces.html;
  
  
  var getStack = emptyFunction_1.thatReturns('');
  
  {
    getStack = getCurrentFiberStackAddendum$2;
  
    var warnedUnknownTags = {
      // Chrome is the only major browser not shipping <time>. But as of July
      // 2017 it intends to ship it due to widespread usage. We intentionally
      // *don't* warn for <time> even if it's unrecognized by Chrome because
      // it soon will be, and many apps have been using it anyway.
      time: true,
      // There are working polyfills for <dialog>. Let people use it.
      dialog: true
    };
  
    var validatePropertiesInDevelopment = function (type, props) {
      validateProperties(type, props);
      validateProperties$1(type, props);
      validateProperties$2(type, props);
    };
  
    // HTML parsing normalizes CR and CRLF to LF.
    // It also can turn \u0000 into \uFFFD inside attributes.
    // https://www.w3.org/TR/html5/single-page.html#preprocessing-the-input-stream
    // If we have a mismatch, it might be caused by that.
    // We will still patch up in this case but not fire the warning.
    var NORMALIZE_NEWLINES_REGEX = /\r\n?/g;
    var NORMALIZE_NULL_AND_REPLACEMENT_REGEX = /\u0000|\uFFFD/g;
  
    var normalizeMarkupForTextOrAttribute = function (markup) {
      var markupString = typeof markup === 'string' ? markup : '' + markup;
      return markupString.replace(NORMALIZE_NEWLINES_REGEX, '\n').replace(NORMALIZE_NULL_AND_REPLACEMENT_REGEX, '');
    };
  
    var warnForTextDifference = function (serverText, clientText) {
      if (didWarnInvalidHydration) {
        return;
      }
      var normalizedClientText = normalizeMarkupForTextOrAttribute(clientText);
      var normalizedServerText = normalizeMarkupForTextOrAttribute(serverText);
      if (normalizedServerText === normalizedClientText) {
        return;
      }
      didWarnInvalidHydration = true;
      warning_1$1(false, 'Text content did not match. Server: "%s" Client: "%s"', normalizedServerText, normalizedClientText);
    };
  
    var warnForPropDifference = function (propName, serverValue, clientValue) {
      if (didWarnInvalidHydration) {
        return;
      }
      var normalizedClientValue = normalizeMarkupForTextOrAttribute(clientValue);
      var normalizedServerValue = normalizeMarkupForTextOrAttribute(serverValue);
      if (normalizedServerValue === normalizedClientValue) {
        return;
      }
      didWarnInvalidHydration = true;
      warning_1$1(false, 'Prop `%s` did not match. Server: %s Client: %s', propName, JSON.stringify(normalizedServerValue), JSON.stringify(normalizedClientValue));
    };
  
    var warnForExtraAttributes = function (attributeNames) {
      if (didWarnInvalidHydration) {
        return;
      }
      didWarnInvalidHydration = true;
      var names = [];
      attributeNames.forEach(function (name) {
        names.push(name);
      });
      warning_1$1(false, 'Extra attributes from the server: %s', names);
    };
  
    var warnForInvalidEventListener = function (registrationName, listener) {
      if (listener === false) {
        warning_1$1(false, 'Expected `%s` listener to be a function, instead got `false`.\n\n' + 'If you used to conditionally omit it with %s={condition && value}, ' + 'pass %s={condition ? value : undefined} instead.%s', registrationName, registrationName, registrationName, getCurrentFiberStackAddendum$2());
      } else {
        warning_1$1(false, 'Expected `%s` listener to be a function, instead got a value of `%s` type.%s', registrationName, typeof listener, getCurrentFiberStackAddendum$2());
      }
    };
  
    // Parse the HTML and read it back to normalize the HTML string so that it
    // can be used for comparison.
    var normalizeHTML = function (parent, html) {
      // We could have created a separate document here to avoid
      // re-initializing custom elements if they exist. But this breaks
      // how <noscript> is being handled. So we use the same document.
      // See the discussion in https://github.com/facebook/react/pull/11157.
      var testElement = parent.namespaceURI === HTML_NAMESPACE ? parent.ownerDocument.createElement(parent.tagName) : parent.ownerDocument.createElementNS(parent.namespaceURI, parent.tagName);
      testElement.innerHTML = html;
      return testElement.innerHTML;
    };
  }
  
  function ensureListeningTo(rootContainerElement, registrationName) {
    var isDocumentOrFragment = rootContainerElement.nodeType === DOCUMENT_NODE || rootContainerElement.nodeType === DOCUMENT_FRAGMENT_NODE;
    var doc = isDocumentOrFragment ? rootContainerElement : rootContainerElement.ownerDocument;
    listenTo(registrationName, doc);
  }
  
  function getOwnerDocumentFromRootContainer(rootContainerElement) {
    return rootContainerElement.nodeType === DOCUMENT_NODE ? rootContainerElement : rootContainerElement.ownerDocument;
  }
  
  // There are so many media events, it makes sense to just
  // maintain a list rather than create a `trapBubbledEvent` for each
  var mediaEvents = {
    topAbort: 'abort',
    topCanPlay: 'canplay',
    topCanPlayThrough: 'canplaythrough',
    topDurationChange: 'durationchange',
    topEmptied: 'emptied',
    topEncrypted: 'encrypted',
    topEnded: 'ended',
    topError: 'error',
    topLoadedData: 'loadeddata',
    topLoadedMetadata: 'loadedmetadata',
    topLoadStart: 'loadstart',
    topPause: 'pause',
    topPlay: 'play',
    topPlaying: 'playing',
    topProgress: 'progress',
    topRateChange: 'ratechange',
    topSeeked: 'seeked',
    topSeeking: 'seeking',
    topStalled: 'stalled',
    topSuspend: 'suspend',
    topTimeUpdate: 'timeupdate',
    topVolumeChange: 'volumechange',
    topWaiting: 'waiting'
  };
  
  function trapClickOnNonInteractiveElement(node) {
    // Mobile Safari does not fire properly bubble click events on
    // non-interactive elements, which means delegated click listeners do not
    // fire. The workaround for this bug involves attaching an empty click
    // listener on the target node.
    // http://www.quirksmode.org/blog/archives/2010/09/click_event_del.html
    // Just set it using the onclick property so that we don't have to manage any
    // bookkeeping for it. Not sure if we need to clear it when the listener is
    // removed.
    // TODO: Only do this for the relevant Safaris maybe?
    node.onclick = emptyFunction_1;
  }
  
  function setInitialDOMProperties(tag, domElement, rootContainerElement, nextProps, isCustomComponentTag) {
    for (var propKey in nextProps) {
      if (!nextProps.hasOwnProperty(propKey)) {
        continue;
      }
      var nextProp = nextProps[propKey];
      if (propKey === STYLE) {
        {
          if (nextProp) {
            // Freeze the next style object so that we can assume it won't be
            // mutated. We have already warned for this in the past.
            Object.freeze(nextProp);
          }
        }
        // Relies on `updateStylesByID` not mutating `styleUpdates`.
        setValueForStyles(domElement, nextProp, getStack);
      } else if (propKey === DANGEROUSLY_SET_INNER_HTML) {
        var nextHtml = nextProp ? nextProp[HTML] : undefined;
        if (nextHtml != null) {
          setInnerHTML(domElement, nextHtml);
        }
      } else if (propKey === CHILDREN) {
        if (typeof nextProp === 'string') {
          // Avoid setting initial textContent when the text is empty. In IE11 setting
          // textContent on a <textarea> will cause the placeholder to not
          // show within the <textarea> until it has been focused and blurred again.
          // https://github.com/facebook/react/issues/6731#issuecomment-254874553
          var canSetTextContent = tag !== 'textarea' || nextProp !== '';
          if (canSetTextContent) {
            setTextContent$1(domElement, nextProp);
          }
        } else if (typeof nextProp === 'number') {
          setTextContent$1(domElement, '' + nextProp);
        }
      } else if (propKey === SUPPRESS_CONTENT_EDITABLE_WARNING || propKey === SUPPRESS_HYDRATION_WARNING$1) {
        // Noop
      } else if (propKey === AUTOFOCUS) {
        // We polyfill it separately on the client during commit.
        // We blacklist it here rather than in the property list because we emit it in SSR.
      } else if (registrationNameModules.hasOwnProperty(propKey)) {
        if (nextProp != null) {
          if (true && typeof nextProp !== 'function') {
            warnForInvalidEventListener(propKey, nextProp);
          }
          ensureListeningTo(rootContainerElement, propKey);
        }
      } else if (isCustomComponentTag) {
        setValueForAttribute(domElement, propKey, nextProp);
      } else if (nextProp != null) {
        // If we're updating to null or undefined, we should remove the property
        // from the DOM node instead of inadvertently setting to a string. This
        // brings us in line with the same behavior we have on initial render.
        setValueForProperty(domElement, propKey, nextProp);
      }
    }
  }
  
  function updateDOMProperties(domElement, updatePayload, wasCustomComponentTag, isCustomComponentTag) {
    // TODO: Handle wasCustomComponentTag
    for (var i = 0; i < updatePayload.length; i += 2) {
      var propKey = updatePayload[i];
      var propValue = updatePayload[i + 1];
      if (propKey === STYLE) {
        setValueForStyles(domElement, propValue, getStack);
      } else if (propKey === DANGEROUSLY_SET_INNER_HTML) {
        setInnerHTML(domElement, propValue);
      } else if (propKey === CHILDREN) {
        setTextContent$1(domElement, propValue);
      } else if (isCustomComponentTag) {
        if (propValue != null) {
          setValueForAttribute(domElement, propKey, propValue);
        } else {
          deleteValueForAttribute(domElement, propKey);
        }
      } else if (propValue != null) {
        setValueForProperty(domElement, propKey, propValue);
      } else {
        // If we're updating to null or undefined, we should remove the property
        // from the DOM node instead of inadvertently setting to a string. This
        // brings us in line with the same behavior we have on initial render.
        deleteValueForProperty(domElement, propKey);
      }
    }
  }
  
  function createElement$1(type, props, rootContainerElement, parentNamespace) {
    // We create tags in the namespace of their parent container, except HTML
    var ownerDocument = getOwnerDocumentFromRootContainer(rootContainerElement);
    var domElement;
    var namespaceURI = parentNamespace;
    if (namespaceURI === HTML_NAMESPACE) {
      namespaceURI = getIntrinsicNamespace(type);
    }
    if (namespaceURI === HTML_NAMESPACE) {
      {
        var isCustomComponentTag = isCustomComponent(type, props);
        // Should this check be gated by parent namespace? Not sure we want to
        // allow <SVG> or <mATH>.
        warning_1$1(isCustomComponentTag || type === type.toLowerCase(), '<%s /> is using uppercase HTML. Always use lowercase HTML tags ' + 'in React.', type);
      }
  
      if (type === 'script') {
        // Create the script via .innerHTML so its "parser-inserted" flag is
        // set to true and it does not execute
        var div = ownerDocument.createElement('div');
        div.innerHTML = '<script><' + '/script>'; // eslint-disable-line
        // This is guaranteed to yield a script element.
        var firstChild = div.firstChild;
        domElement = div.removeChild(firstChild);
      } else if (typeof props.is === 'string') {
        // $FlowIssue `createElement` should be updated for Web Components
        domElement = ownerDocument.createElement(type, { is: props.is });
      } else {
        // Separate else branch instead of using `props.is || undefined` above because of a Firefox bug.
        // See discussion in https://github.com/facebook/react/pull/6896
        // and discussion in https://bugzilla.mozilla.org/show_bug.cgi?id=1276240
        domElement = ownerDocument.createElement(type);
      }
    } else {
      domElement = ownerDocument.createElementNS(namespaceURI, type);
    }
  
    {
      if (namespaceURI === HTML_NAMESPACE) {
        if (!isCustomComponentTag && Object.prototype.toString.call(domElement) === '[object HTMLUnknownElement]' && !Object.prototype.hasOwnProperty.call(warnedUnknownTags, type)) {
          warnedUnknownTags[type] = true;
          warning_1$1(false, 'The tag <%s> is unrecognized in this browser. ' + 'If you meant to render a React component, start its name with ' + 'an uppercase letter.', type);
        }
      }
    }
  
    return domElement;
  }
  
  function createTextNode$1(text, rootContainerElement) {
    return getOwnerDocumentFromRootContainer(rootContainerElement).createTextNode(text);
  }
  
  function setInitialProperties$1(domElement, tag, rawProps, rootContainerElement) {
    var isCustomComponentTag = isCustomComponent(tag, rawProps);
    {
      validatePropertiesInDevelopment(tag, rawProps);
      if (isCustomComponentTag && !didWarnShadyDOM && domElement.shadyRoot) {
        warning_1$1(false, '%s is using shady DOM. Using shady DOM with React can ' + 'cause things to break subtly.', getCurrentFiberOwnerName$1() || 'A component');
        didWarnShadyDOM = true;
      }
    }
  
    // TODO: Make sure that we check isMounted before firing any of these events.
    var props;
    switch (tag) {
      case 'iframe':
      case 'object':
        trapBubbledEvent('topLoad', 'load', domElement);
        props = rawProps;
        break;
      case 'video':
      case 'audio':
        // Create listener for each media event
        for (var event in mediaEvents) {
          if (mediaEvents.hasOwnProperty(event)) {
            trapBubbledEvent(event, mediaEvents[event], domElement);
          }
        }
        props = rawProps;
        break;
      case 'source':
        trapBubbledEvent('topError', 'error', domElement);
        props = rawProps;
        break;
      case 'img':
      case 'image':
        trapBubbledEvent('topError', 'error', domElement);
        trapBubbledEvent('topLoad', 'load', domElement);
        props = rawProps;
        break;
      case 'form':
        trapBubbledEvent('topReset', 'reset', domElement);
        trapBubbledEvent('topSubmit', 'submit', domElement);
        props = rawProps;
        break;
      case 'details':
        trapBubbledEvent('topToggle', 'toggle', domElement);
        props = rawProps;
        break;
      case 'input':
        initWrapperState(domElement, rawProps);
        props = getHostProps(domElement, rawProps);
        trapBubbledEvent('topInvalid', 'invalid', domElement);
        // For controlled components we always need to ensure we're listening
        // to onChange. Even if there is no listener.
        ensureListeningTo(rootContainerElement, 'onChange');
        break;
      case 'option':
        validateProps(domElement, rawProps);
        props = getHostProps$1(domElement, rawProps);
        break;
      case 'select':
        initWrapperState$1(domElement, rawProps);
        props = getHostProps$2(domElement, rawProps);
        trapBubbledEvent('topInvalid', 'invalid', domElement);
        // For controlled components we always need to ensure we're listening
        // to onChange. Even if there is no listener.
        ensureListeningTo(rootContainerElement, 'onChange');
        break;
      case 'textarea':
        initWrapperState$2(domElement, rawProps);
        props = getHostProps$3(domElement, rawProps);
        trapBubbledEvent('topInvalid', 'invalid', domElement);
        // For controlled components we always need to ensure we're listening
        // to onChange. Even if there is no listener.
        ensureListeningTo(rootContainerElement, 'onChange');
        break;
      default:
        props = rawProps;
    }
  
    assertValidProps(tag, props, getStack);
  
    setInitialDOMProperties(tag, domElement, rootContainerElement, props, isCustomComponentTag);
  
    switch (tag) {
      case 'input':
        // TODO: Make sure we check if this is still unmounted or do any clean
        // up necessary since we never stop tracking anymore.
        track(domElement);
        postMountWrapper(domElement, rawProps);
        break;
      case 'textarea':
        // TODO: Make sure we check if this is still unmounted or do any clean
        // up necessary since we never stop tracking anymore.
        track(domElement);
        postMountWrapper$3(domElement, rawProps);
        break;
      case 'option':
        postMountWrapper$1(domElement, rawProps);
        break;
      case 'select':
        postMountWrapper$2(domElement, rawProps);
        break;
      default:
        if (typeof props.onClick === 'function') {
          // TODO: This cast may not be sound for SVG, MathML or custom elements.
          trapClickOnNonInteractiveElement(domElement);
        }
        break;
    }
  }
  
  // Calculate the diff between the two objects.
  function diffProperties$1(domElement, tag, lastRawProps, nextRawProps, rootContainerElement) {
    {
      validatePropertiesInDevelopment(tag, nextRawProps);
    }
  
    var updatePayload = null;
  
    var lastProps;
    var nextProps;
    switch (tag) {
      case 'input':
        lastProps = getHostProps(domElement, lastRawProps);
        nextProps = getHostProps(domElement, nextRawProps);
        updatePayload = [];
        break;
      case 'option':
        lastProps = getHostProps$1(domElement, lastRawProps);
        nextProps = getHostProps$1(domElement, nextRawProps);
        updatePayload = [];
        break;
      case 'select':
        lastProps = getHostProps$2(domElement, lastRawProps);
        nextProps = getHostProps$2(domElement, nextRawProps);
        updatePayload = [];
        break;
      case 'textarea':
        lastProps = getHostProps$3(domElement, lastRawProps);
        nextProps = getHostProps$3(domElement, nextRawProps);
        updatePayload = [];
        break;
      default:
        lastProps = lastRawProps;
        nextProps = nextRawProps;
        if (typeof lastProps.onClick !== 'function' && typeof nextProps.onClick === 'function') {
          // TODO: This cast may not be sound for SVG, MathML or custom elements.
          trapClickOnNonInteractiveElement(domElement);
        }
        break;
    }
  
    assertValidProps(tag, nextProps, getStack);
  
    var propKey;
    var styleName;
    var styleUpdates = null;
    for (propKey in lastProps) {
      if (nextProps.hasOwnProperty(propKey) || !lastProps.hasOwnProperty(propKey) || lastProps[propKey] == null) {
        continue;
      }
      if (propKey === STYLE) {
        var lastStyle = lastProps[propKey];
        for (styleName in lastStyle) {
          if (lastStyle.hasOwnProperty(styleName)) {
            if (!styleUpdates) {
              styleUpdates = {};
            }
            styleUpdates[styleName] = '';
          }
        }
      } else if (propKey === DANGEROUSLY_SET_INNER_HTML || propKey === CHILDREN) {
        // Noop. This is handled by the clear text mechanism.
      } else if (propKey === SUPPRESS_CONTENT_EDITABLE_WARNING || propKey === SUPPRESS_HYDRATION_WARNING$1) {
        // Noop
      } else if (propKey === AUTOFOCUS) {
        // Noop. It doesn't work on updates anyway.
      } else if (registrationNameModules.hasOwnProperty(propKey)) {
        // This is a special case. If any listener updates we need to ensure
        // that the "current" fiber pointer gets updated so we need a commit
        // to update this element.
        if (!updatePayload) {
          updatePayload = [];
        }
      } else {
        // For all other deleted properties we add it to the queue. We use
        // the whitelist in the commit phase instead.
        (updatePayload = updatePayload || []).push(propKey, null);
      }
    }
    for (propKey in nextProps) {
      var nextProp = nextProps[propKey];
      var lastProp = lastProps != null ? lastProps[propKey] : undefined;
      if (!nextProps.hasOwnProperty(propKey) || nextProp === lastProp || nextProp == null && lastProp == null) {
        continue;
      }
      if (propKey === STYLE) {
        {
          if (nextProp) {
            // Freeze the next style object so that we can assume it won't be
            // mutated. We have already warned for this in the past.
            Object.freeze(nextProp);
          }
        }
        if (lastProp) {
          // Unset styles on `lastProp` but not on `nextProp`.
          for (styleName in lastProp) {
            if (lastProp.hasOwnProperty(styleName) && (!nextProp || !nextProp.hasOwnProperty(styleName))) {
              if (!styleUpdates) {
                styleUpdates = {};
              }
              styleUpdates[styleName] = '';
            }
          }
          // Update styles that changed since `lastProp`.
          for (styleName in nextProp) {
            if (nextProp.hasOwnProperty(styleName) && lastProp[styleName] !== nextProp[styleName]) {
              if (!styleUpdates) {
                styleUpdates = {};
              }
              styleUpdates[styleName] = nextProp[styleName];
            }
          }
        } else {
          // Relies on `updateStylesByID` not mutating `styleUpdates`.
          if (!styleUpdates) {
            if (!updatePayload) {
              updatePayload = [];
            }
            updatePayload.push(propKey, styleUpdates);
          }
          styleUpdates = nextProp;
        }
      } else if (propKey === DANGEROUSLY_SET_INNER_HTML) {
        var nextHtml = nextProp ? nextProp[HTML] : undefined;
        var lastHtml = lastProp ? lastProp[HTML] : undefined;
        if (nextHtml != null) {
          if (lastHtml !== nextHtml) {
            (updatePayload = updatePayload || []).push(propKey, '' + nextHtml);
          }
        } else {
          // TODO: It might be too late to clear this if we have children
          // inserted already.
        }
      } else if (propKey === CHILDREN) {
        if (lastProp !== nextProp && (typeof nextProp === 'string' || typeof nextProp === 'number')) {
          (updatePayload = updatePayload || []).push(propKey, '' + nextProp);
        }
      } else if (propKey === SUPPRESS_CONTENT_EDITABLE_WARNING || propKey === SUPPRESS_HYDRATION_WARNING$1) {
        // Noop
      } else if (registrationNameModules.hasOwnProperty(propKey)) {
        if (nextProp != null) {
          // We eagerly listen to this even though we haven't committed yet.
          if (true && typeof nextProp !== 'function') {
            warnForInvalidEventListener(propKey, nextProp);
          }
          ensureListeningTo(rootContainerElement, propKey);
        }
        if (!updatePayload && lastProp !== nextProp) {
          // This is a special case. If any listener updates we need to ensure
          // that the "current" props pointer gets updated so we need a commit
          // to update this element.
          updatePayload = [];
        }
      } else {
        // For any other property we always add it to the queue and then we
        // filter it out using the whitelist during the commit.
        (updatePayload = updatePayload || []).push(propKey, nextProp);
      }
    }
    if (styleUpdates) {
      (updatePayload = updatePayload || []).push(STYLE, styleUpdates);
    }
    return updatePayload;
  }
  
  // Apply the diff.
  function updateProperties$1(domElement, updatePayload, tag, lastRawProps, nextRawProps) {
    var wasCustomComponentTag = isCustomComponent(tag, lastRawProps);
    var isCustomComponentTag = isCustomComponent(tag, nextRawProps);
    // Apply the diff.
    updateDOMProperties(domElement, updatePayload, wasCustomComponentTag, isCustomComponentTag);
  
    // TODO: Ensure that an update gets scheduled if any of the special props
    // changed.
    switch (tag) {
      case 'input':
        // Update the wrapper around inputs *after* updating props. This has to
        // happen after `updateDOMProperties`. Otherwise HTML5 input validations
        // raise warnings and prevent the new value from being assigned.
        updateWrapper(domElement, nextRawProps);
  
        // We also check that we haven't missed a value update, such as a
        // Radio group shifting the checked value to another named radio input.
        updateValueIfChanged(domElement);
        break;
      case 'textarea':
        updateWrapper$1(domElement, nextRawProps);
        break;
      case 'select':
        // <select> value update needs to occur after <option> children
        // reconciliation
        postUpdateWrapper(domElement, nextRawProps);
        break;
    }
  }
  
  function diffHydratedProperties$1(domElement, tag, rawProps, parentNamespace, rootContainerElement) {
    {
      var suppressHydrationWarning = rawProps[SUPPRESS_HYDRATION_WARNING$1] === true;
      var isCustomComponentTag = isCustomComponent(tag, rawProps);
      validatePropertiesInDevelopment(tag, rawProps);
      if (isCustomComponentTag && !didWarnShadyDOM && domElement.shadyRoot) {
        warning_1$1(false, '%s is using shady DOM. Using shady DOM with React can ' + 'cause things to break subtly.', getCurrentFiberOwnerName$1() || 'A component');
        didWarnShadyDOM = true;
      }
    }
  
    // TODO: Make sure that we check isMounted before firing any of these events.
    switch (tag) {
      case 'iframe':
      case 'object':
        trapBubbledEvent('topLoad', 'load', domElement);
        break;
      case 'video':
      case 'audio':
        // Create listener for each media event
        for (var event in mediaEvents) {
          if (mediaEvents.hasOwnProperty(event)) {
            trapBubbledEvent(event, mediaEvents[event], domElement);
          }
        }
        break;
      case 'source':
        trapBubbledEvent('topError', 'error', domElement);
        break;
      case 'img':
      case 'image':
        trapBubbledEvent('topError', 'error', domElement);
        trapBubbledEvent('topLoad', 'load', domElement);
        break;
      case 'form':
        trapBubbledEvent('topReset', 'reset', domElement);
        trapBubbledEvent('topSubmit', 'submit', domElement);
        break;
      case 'details':
        trapBubbledEvent('topToggle', 'toggle', domElement);
        break;
      case 'input':
        initWrapperState(domElement, rawProps);
        trapBubbledEvent('topInvalid', 'invalid', domElement);
        // For controlled components we always need to ensure we're listening
        // to onChange. Even if there is no listener.
        ensureListeningTo(rootContainerElement, 'onChange');
        break;
      case 'option':
        validateProps(domElement, rawProps);
        break;
      case 'select':
        initWrapperState$1(domElement, rawProps);
        trapBubbledEvent('topInvalid', 'invalid', domElement);
        // For controlled components we always need to ensure we're listening
        // to onChange. Even if there is no listener.
        ensureListeningTo(rootContainerElement, 'onChange');
        break;
      case 'textarea':
        initWrapperState$2(domElement, rawProps);
        trapBubbledEvent('topInvalid', 'invalid', domElement);
        // For controlled components we always need to ensure we're listening
        // to onChange. Even if there is no listener.
        ensureListeningTo(rootContainerElement, 'onChange');
        break;
    }
  
    assertValidProps(tag, rawProps, getStack);
  
    {
      var extraAttributeNames = new Set();
      var attributes = domElement.attributes;
      for (var i = 0; i < attributes.length; i++) {
        var name = attributes[i].name.toLowerCase();
        switch (name) {
          // Built-in SSR attribute is whitelisted
          case 'data-reactroot':
            break;
          // Controlled attributes are not validated
          // TODO: Only ignore them on controlled tags.
          case 'value':
            break;
          case 'checked':
            break;
          case 'selected':
            break;
          default:
            // Intentionally use the original name.
            // See discussion in https://github.com/facebook/react/pull/10676.
            extraAttributeNames.add(attributes[i].name);
        }
      }
    }
  
    var updatePayload = null;
    for (var propKey in rawProps) {
      if (!rawProps.hasOwnProperty(propKey)) {
        continue;
      }
      var nextProp = rawProps[propKey];
      if (propKey === CHILDREN) {
        // For text content children we compare against textContent. This
        // might match additional HTML that is hidden when we read it using
        // textContent. E.g. "foo" will match "f<span>oo</span>" but that still
        // satisfies our requirement. Our requirement is not to produce perfect
        // HTML and attributes. Ideally we should preserve structure but it's
        // ok not to if the visible content is still enough to indicate what
        // even listeners these nodes might be wired up to.
        // TODO: Warn if there is more than a single textNode as a child.
        // TODO: Should we use domElement.firstChild.nodeValue to compare?
        if (typeof nextProp === 'string') {
          if (domElement.textContent !== nextProp) {
            if (true && !suppressHydrationWarning) {
              warnForTextDifference(domElement.textContent, nextProp);
            }
            updatePayload = [CHILDREN, nextProp];
          }
        } else if (typeof nextProp === 'number') {
          if (domElement.textContent !== '' + nextProp) {
            if (true && !suppressHydrationWarning) {
              warnForTextDifference(domElement.textContent, nextProp);
            }
            updatePayload = [CHILDREN, '' + nextProp];
          }
        }
      } else if (registrationNameModules.hasOwnProperty(propKey)) {
        if (nextProp != null) {
          if (true && typeof nextProp !== 'function') {
            warnForInvalidEventListener(propKey, nextProp);
          }
          ensureListeningTo(rootContainerElement, propKey);
        }
      } else {
        // Validate that the properties correspond to their expected values.
        var serverValue;
        var propertyInfo;
        if (suppressHydrationWarning) {
          // Don't bother comparing. We're ignoring all these warnings.
        } else if (propKey === SUPPRESS_CONTENT_EDITABLE_WARNING || propKey === SUPPRESS_HYDRATION_WARNING$1 ||
        // Controlled attributes are not validated
        // TODO: Only ignore them on controlled tags.
        propKey === 'value' || propKey === 'checked' || propKey === 'selected') {
          // Noop
        } else if (propKey === DANGEROUSLY_SET_INNER_HTML) {
          var rawHtml = nextProp ? nextProp[HTML] || '' : '';
          var serverHTML = domElement.innerHTML;
          var expectedHTML = normalizeHTML(domElement, rawHtml);
          if (expectedHTML !== serverHTML) {
            warnForPropDifference(propKey, serverHTML, expectedHTML);
          }
        } else if (propKey === STYLE) {
          // $FlowFixMe - Should be inferred as not undefined.
          extraAttributeNames['delete'](propKey);
          var expectedStyle = createDangerousStringForStyles(nextProp);
          serverValue = domElement.getAttribute('style');
          if (expectedStyle !== serverValue) {
            warnForPropDifference(propKey, serverValue, expectedStyle);
          }
        } else if (isCustomComponentTag) {
          // $FlowFixMe - Should be inferred as not undefined.
          extraAttributeNames['delete'](propKey.toLowerCase());
          serverValue = getValueForAttribute(domElement, propKey, nextProp);
  
          if (nextProp !== serverValue) {
            warnForPropDifference(propKey, serverValue, nextProp);
          }
        } else if (shouldSetAttribute(propKey, nextProp)) {
          if (propertyInfo = getPropertyInfo(propKey)) {
            // $FlowFixMe - Should be inferred as not undefined.
            extraAttributeNames['delete'](propertyInfo.attributeName);
            serverValue = getValueForProperty(domElement, propKey, nextProp);
          } else {
            var ownNamespace = parentNamespace;
            if (ownNamespace === HTML_NAMESPACE) {
              ownNamespace = getIntrinsicNamespace(tag);
            }
            if (ownNamespace === HTML_NAMESPACE) {
              // $FlowFixMe - Should be inferred as not undefined.
              extraAttributeNames['delete'](propKey.toLowerCase());
            } else {
              // $FlowFixMe - Should be inferred as not undefined.
              extraAttributeNames['delete'](propKey);
            }
            serverValue = getValueForAttribute(domElement, propKey, nextProp);
          }
  
          if (nextProp !== serverValue) {
            warnForPropDifference(propKey, serverValue, nextProp);
          }
        }
      }
    }
  
    {
      // $FlowFixMe - Should be inferred as not undefined.
      if (extraAttributeNames.size > 0 && !suppressHydrationWarning) {
        // $FlowFixMe - Should be inferred as not undefined.
        warnForExtraAttributes(extraAttributeNames);
      }
    }
  
    switch (tag) {
      case 'input':
        // TODO: Make sure we check if this is still unmounted or do any clean
        // up necessary since we never stop tracking anymore.
        track(domElement);
        postMountWrapper(domElement, rawProps);
        break;
      case 'textarea':
        // TODO: Make sure we check if this is still unmounted or do any clean
        // up necessary since we never stop tracking anymore.
        track(domElement);
        postMountWrapper$3(domElement, rawProps);
        break;
      case 'select':
      case 'option':
        // For input and textarea we current always set the value property at
        // post mount to force it to diverge from attributes. However, for
        // option and select we don't quite do the same thing and select
        // is not resilient to the DOM state changing so we don't do that here.
        // TODO: Consider not doing this for input and textarea.
        break;
      default:
        if (typeof rawProps.onClick === 'function') {
          // TODO: This cast may not be sound for SVG, MathML or custom elements.
          trapClickOnNonInteractiveElement(domElement);
        }
        break;
    }
  
    return updatePayload;
  }
  
  function diffHydratedText$1(textNode, text) {
    var isDifferent = textNode.nodeValue !== text;
    return isDifferent;
  }
  
  function warnForUnmatchedText$1(textNode, text) {
    {
      warnForTextDifference(textNode.nodeValue, text);
    }
  }
  
  function warnForDeletedHydratableElement$1(parentNode, child) {
    {
      if (didWarnInvalidHydration) {
        return;
      }
      didWarnInvalidHydration = true;
      warning_1$1(false, 'Did not expect server HTML to contain a <%s> in <%s>.', child.nodeName.toLowerCase(), parentNode.nodeName.toLowerCase());
    }
  }
  
  function warnForDeletedHydratableText$1(parentNode, child) {
    {
      if (didWarnInvalidHydration) {
        return;
      }
      didWarnInvalidHydration = true;
      warning_1$1(false, 'Did not expect server HTML to contain the text node "%s" in <%s>.', child.nodeValue, parentNode.nodeName.toLowerCase());
    }
  }
  
  function warnForInsertedHydratedElement$1(parentNode, tag, props) {
    {
      if (didWarnInvalidHydration) {
        return;
      }
      didWarnInvalidHydration = true;
      warning_1$1(false, 'Expected server HTML to contain a matching <%s> in <%s>.', tag, parentNode.nodeName.toLowerCase());
    }
  }
  
  function warnForInsertedHydratedText$1(parentNode, text) {
    {
      if (text === '') {
        // We expect to insert empty text nodes since they're not represented in
        // the HTML.
        // TODO: Remove this special case if we can just avoid inserting empty
        // text nodes.
        return;
      }
      if (didWarnInvalidHydration) {
        return;
      }
      didWarnInvalidHydration = true;
      warning_1$1(false, 'Expected server HTML to contain a matching text node for "%s" in <%s>.', text, parentNode.nodeName.toLowerCase());
    }
  }
  
  function restoreControlledState(domElement, tag, props) {
    switch (tag) {
      case 'input':
        restoreControlledState$1(domElement, props);
        return;
      case 'textarea':
        restoreControlledState$3(domElement, props);
        return;
      case 'select':
        restoreControlledState$2(domElement, props);
        return;
    }
  }
  
  var ReactDOMFiberComponent = Object.freeze({
  	createElement: createElement$1,
  	createTextNode: createTextNode$1,
  	setInitialProperties: setInitialProperties$1,
  	diffProperties: diffProperties$1,
  	updateProperties: updateProperties$1,
  	diffHydratedProperties: diffHydratedProperties$1,
  	diffHydratedText: diffHydratedText$1,
  	warnForUnmatchedText: warnForUnmatchedText$1,
  	warnForDeletedHydratableElement: warnForDeletedHydratableElement$1,
  	warnForDeletedHydratableText: warnForDeletedHydratableText$1,
  	warnForInsertedHydratedElement: warnForInsertedHydratedElement$1,
  	warnForInsertedHydratedText: warnForInsertedHydratedText$1,
  	restoreControlledState: restoreControlledState
  });
  
  // TODO: direct imports like some-package/src/* are bad. Fix me.
  var getCurrentFiberStackAddendum$6 = ReactDebugCurrentFiber.getCurrentFiberStackAddendum;
  
  var validateDOMNesting = emptyFunction_1;
  
  {
    // This validation code was written based on the HTML5 parsing spec:
    // https://html.spec.whatwg.org/multipage/syntax.html#has-an-element-in-scope
    //
    // Note: this does not catch all invalid nesting, nor does it try to (as it's
    // not clear what practical benefit doing so provides); instead, we warn only
    // for cases where the parser will give a parse tree differing from what React
    // intended. For example, <b><div></div></b> is invalid but we don't warn
    // because it still parses correctly; we do warn for other cases like nested
    // <p> tags where the beginning of the second element implicitly closes the
    // first, causing a confusing mess.
  
    // https://html.spec.whatwg.org/multipage/syntax.html#special
    var specialTags = ['address', 'applet', 'area', 'article', 'aside', 'base', 'basefont', 'bgsound', 'blockquote', 'body', 'br', 'button', 'caption', 'center', 'col', 'colgroup', 'dd', 'details', 'dir', 'div', 'dl', 'dt', 'embed', 'fieldset', 'figcaption', 'figure', 'footer', 'form', 'frame', 'frameset', 'h1', 'h2', 'h3', 'h4', 'h5', 'h6', 'head', 'header', 'hgroup', 'hr', 'html', 'iframe', 'img', 'input', 'isindex', 'li', 'link', 'listing', 'main', 'marquee', 'menu', 'menuitem', 'meta', 'nav', 'noembed', 'noframes', 'noscript', 'object', 'ol', 'p', 'param', 'plaintext', 'pre', 'script', 'section', 'select', 'source', 'style', 'summary', 'table', 'tbody', 'td', 'template', 'textarea', 'tfoot', 'th', 'thead', 'title', 'tr', 'track', 'ul', 'wbr', 'xmp'];
  
    // https://html.spec.whatwg.org/multipage/syntax.html#has-an-element-in-scope
    var inScopeTags = ['applet', 'caption', 'html', 'table', 'td', 'th', 'marquee', 'object', 'template',
  
    // https://html.spec.whatwg.org/multipage/syntax.html#html-integration-point
    // TODO: Distinguish by namespace here -- for <title>, including it here
    // errs on the side of fewer warnings
    'foreignObject', 'desc', 'title'];
  
    // https://html.spec.whatwg.org/multipage/syntax.html#has-an-element-in-button-scope
    var buttonScopeTags = inScopeTags.concat(['button']);
  
    // https://html.spec.whatwg.org/multipage/syntax.html#generate-implied-end-tags
    var impliedEndTags = ['dd', 'dt', 'li', 'option', 'optgroup', 'p', 'rp', 'rt'];
  
    var emptyAncestorInfo = {
      current: null,
  
      formTag: null,
      aTagInScope: null,
      buttonTagInScope: null,
      nobrTagInScope: null,
      pTagInButtonScope: null,
  
      listItemTagAutoclosing: null,
      dlItemTagAutoclosing: null
    };
  
    var updatedAncestorInfo$1 = function (oldInfo, tag, instance) {
      var ancestorInfo = _assign({}, oldInfo || emptyAncestorInfo);
      var info = { tag: tag, instance: instance };
  
      if (inScopeTags.indexOf(tag) !== -1) {
        ancestorInfo.aTagInScope = null;
        ancestorInfo.buttonTagInScope = null;
        ancestorInfo.nobrTagInScope = null;
      }
      if (buttonScopeTags.indexOf(tag) !== -1) {
        ancestorInfo.pTagInButtonScope = null;
      }
  
      // See rules for 'li', 'dd', 'dt' start tags in
      // https://html.spec.whatwg.org/multipage/syntax.html#parsing-main-inbody
      if (specialTags.indexOf(tag) !== -1 && tag !== 'address' && tag !== 'div' && tag !== 'p') {
        ancestorInfo.listItemTagAutoclosing = null;
        ancestorInfo.dlItemTagAutoclosing = null;
      }
  
      ancestorInfo.current = info;
  
      if (tag === 'form') {
        ancestorInfo.formTag = info;
      }
      if (tag === 'a') {
        ancestorInfo.aTagInScope = info;
      }
      if (tag === 'button') {
        ancestorInfo.buttonTagInScope = info;
      }
      if (tag === 'nobr') {
        ancestorInfo.nobrTagInScope = info;
      }
      if (tag === 'p') {
        ancestorInfo.pTagInButtonScope = info;
      }
      if (tag === 'li') {
        ancestorInfo.listItemTagAutoclosing = info;
      }
      if (tag === 'dd' || tag === 'dt') {
        ancestorInfo.dlItemTagAutoclosing = info;
      }
  
      return ancestorInfo;
    };
  
    /**
     * Returns whether
     */
    var isTagValidWithParent = function (tag, parentTag) {
      // First, let's check if we're in an unusual parsing mode...
      switch (parentTag) {
        // https://html.spec.whatwg.org/multipage/syntax.html#parsing-main-inselect
        case 'select':
          return tag === 'option' || tag === 'optgroup' || tag === '#text';
        case 'optgroup':
          return tag === 'option' || tag === '#text';
        // Strictly speaking, seeing an <option> doesn't mean we're in a <select>
        // but
        case 'option':
          return tag === '#text';
        // https://html.spec.whatwg.org/multipage/syntax.html#parsing-main-intd
        // https://html.spec.whatwg.org/multipage/syntax.html#parsing-main-incaption
        // No special behavior since these rules fall back to "in body" mode for
        // all except special table nodes which cause bad parsing behavior anyway.
  
        // https://html.spec.whatwg.org/multipage/syntax.html#parsing-main-intr
        case 'tr':
          return tag === 'th' || tag === 'td' || tag === 'style' || tag === 'script' || tag === 'template';
        // https://html.spec.whatwg.org/multipage/syntax.html#parsing-main-intbody
        case 'tbody':
        case 'thead':
        case 'tfoot':
          return tag === 'tr' || tag === 'style' || tag === 'script' || tag === 'template';
        // https://html.spec.whatwg.org/multipage/syntax.html#parsing-main-incolgroup
        case 'colgroup':
          return tag === 'col' || tag === 'template';
        // https://html.spec.whatwg.org/multipage/syntax.html#parsing-main-intable
        case 'table':
          return tag === 'caption' || tag === 'colgroup' || tag === 'tbody' || tag === 'tfoot' || tag === 'thead' || tag === 'style' || tag === 'script' || tag === 'template';
        // https://html.spec.whatwg.org/multipage/syntax.html#parsing-main-inhead
        case 'head':
          return tag === 'base' || tag === 'basefont' || tag === 'bgsound' || tag === 'link' || tag === 'meta' || tag === 'title' || tag === 'noscript' || tag === 'noframes' || tag === 'style' || tag === 'script' || tag === 'template';
        // https://html.spec.whatwg.org/multipage/semantics.html#the-html-element
        case 'html':
          return tag === 'head' || tag === 'body';
        case '#document':
          return tag === 'html';
      }
  
      // Probably in the "in body" parsing mode, so we outlaw only tag combos
      // where the parsing rules cause implicit opens or closes to be added.
      // https://html.spec.whatwg.org/multipage/syntax.html#parsing-main-inbody
      switch (tag) {
        case 'h1':
        case 'h2':
        case 'h3':
        case 'h4':
        case 'h5':
        case 'h6':
          return parentTag !== 'h1' && parentTag !== 'h2' && parentTag !== 'h3' && parentTag !== 'h4' && parentTag !== 'h5' && parentTag !== 'h6';
  
        case 'rp':
        case 'rt':
          return impliedEndTags.indexOf(parentTag) === -1;
  
        case 'body':
        case 'caption':
        case 'col':
        case 'colgroup':
        case 'frame':
        case 'head':
        case 'html':
        case 'tbody':
        case 'td':
        case 'tfoot':
        case 'th':
        case 'thead':
        case 'tr':
          // These tags are only valid with a few parents that have special child
          // parsing rules -- if we're down here, then none of those matched and
          // so we allow it only if we don't know what the parent is, as all other
          // cases are invalid.
          return parentTag == null;
      }
  
      return true;
    };
  
    /**
     * Returns whether
     */
    var findInvalidAncestorForTag = function (tag, ancestorInfo) {
      switch (tag) {
        case 'address':
        case 'article':
        case 'aside':
        case 'blockquote':
        case 'center':
        case 'details':
        case 'dialog':
        case 'dir':
        case 'div':
        case 'dl':
        case 'fieldset':
        case 'figcaption':
        case 'figure':
        case 'footer':
        case 'header':
        case 'hgroup':
        case 'main':
        case 'menu':
        case 'nav':
        case 'ol':
        case 'p':
        case 'section':
        case 'summary':
        case 'ul':
        case 'pre':
        case 'listing':
        case 'table':
        case 'hr':
        case 'xmp':
        case 'h1':
        case 'h2':
        case 'h3':
        case 'h4':
        case 'h5':
        case 'h6':
          return ancestorInfo.pTagInButtonScope;
  
        case 'form':
          return ancestorInfo.formTag || ancestorInfo.pTagInButtonScope;
  
        case 'li':
          return ancestorInfo.listItemTagAutoclosing;
  
        case 'dd':
        case 'dt':
          return ancestorInfo.dlItemTagAutoclosing;
  
        case 'button':
          return ancestorInfo.buttonTagInScope;
  
        case 'a':
          // Spec says something about storing a list of markers, but it sounds
          // equivalent to this check.
          return ancestorInfo.aTagInScope;
  
        case 'nobr':
          return ancestorInfo.nobrTagInScope;
      }
  
      return null;
    };
  
    var didWarn = {};
  
    validateDOMNesting = function (childTag, childText, ancestorInfo) {
      ancestorInfo = ancestorInfo || emptyAncestorInfo;
      var parentInfo = ancestorInfo.current;
      var parentTag = parentInfo && parentInfo.tag;
  
      if (childText != null) {
        warning_1$1(childTag == null, 'validateDOMNesting: when childText is passed, childTag should be null');
        childTag = '#text';
      }
  
      var invalidParent = isTagValidWithParent(childTag, parentTag) ? null : parentInfo;
      var invalidAncestor = invalidParent ? null : findInvalidAncestorForTag(childTag, ancestorInfo);
      var invalidParentOrAncestor = invalidParent || invalidAncestor;
      if (!invalidParentOrAncestor) {
        return;
      }
  
      var ancestorTag = invalidParentOrAncestor.tag;
      var addendum = getCurrentFiberStackAddendum$6();
  
      var warnKey = !!invalidParent + '|' + childTag + '|' + ancestorTag + '|' + addendum;
      if (didWarn[warnKey]) {
        return;
      }
      didWarn[warnKey] = true;
  
      var tagDisplayName = childTag;
      var whitespaceInfo = '';
      if (childTag === '#text') {
        if (/\S/.test(childText)) {
          tagDisplayName = 'Text nodes';
        } else {
          tagDisplayName = 'Whitespace text nodes';
          whitespaceInfo = " Make sure you don't have any extra whitespace between tags on " + 'each line of your source code.';
        }
      } else {
        tagDisplayName = '<' + childTag + '>';
      }
  
      if (invalidParent) {
        var info = '';
        if (ancestorTag === 'table' && childTag === 'tr') {
          info += ' Add a <tbody> to your code to match the DOM tree generated by ' + 'the browser.';
        }
        warning_1$1(false, 'validateDOMNesting(...): %s cannot appear as a child of <%s>.%s%s%s', tagDisplayName, ancestorTag, whitespaceInfo, info, addendum);
      } else {
        warning_1$1(false, 'validateDOMNesting(...): %s cannot appear as a descendant of ' + '<%s>.%s', tagDisplayName, ancestorTag, addendum);
      }
    };
  
    // TODO: turn this into a named export
    validateDOMNesting.updatedAncestorInfo = updatedAncestorInfo$1;
  
    // For testing
    validateDOMNesting.isTagValidInContext = function (tag, ancestorInfo) {
      ancestorInfo = ancestorInfo || emptyAncestorInfo;
      var parentInfo = ancestorInfo.current;
      var parentTag = parentInfo && parentInfo.tag;
      return isTagValidWithParent(tag, parentTag) && !findInvalidAncestorForTag(tag, ancestorInfo);
    };
  }
  
  var validateDOMNesting$1 = validateDOMNesting;
  
  // TODO: direct imports like some-package/src/* are bad. Fix me.
  var createElement = createElement$1;
  var createTextNode = createTextNode$1;
  var setInitialProperties = setInitialProperties$1;
  var diffProperties = diffProperties$1;
  var updateProperties = updateProperties$1;
  var diffHydratedProperties = diffHydratedProperties$1;
  var diffHydratedText = diffHydratedText$1;
  var warnForUnmatchedText = warnForUnmatchedText$1;
  var warnForDeletedHydratableElement = warnForDeletedHydratableElement$1;
  var warnForDeletedHydratableText = warnForDeletedHydratableText$1;
  var warnForInsertedHydratedElement = warnForInsertedHydratedElement$1;
  var warnForInsertedHydratedText = warnForInsertedHydratedText$1;
  var updatedAncestorInfo = validateDOMNesting$1.updatedAncestorInfo;
  var precacheFiberNode = precacheFiberNode$1;
  var updateFiberProps = updateFiberProps$1;
  
  
  {
    var SUPPRESS_HYDRATION_WARNING = 'suppressHydrationWarning';
    if (typeof Map !== 'function' || Map.prototype == null || typeof Map.prototype.forEach !== 'function' || typeof Set !== 'function' || Set.prototype == null || typeof Set.prototype.clear !== 'function' || typeof Set.prototype.forEach !== 'function') {
      warning_1$1(false, 'React depends on Map and Set built-in types. Make sure that you load a ' + 'polyfill in older browsers. http://fb.me/react-polyfills');
    }
  }
  
  injection$3.injectFiberControlledHostComponent(ReactDOMFiberComponent);
  
  var eventsEnabled = null;
  var selectionInformation = null;
  
  /**
   * True if the supplied DOM node is a valid node element.
   *
   * @param {?DOMElement} node The candidate DOM node.
   * @return {boolean} True if the DOM is a valid DOM node.
   * @internal
   */
  function isValidContainer(node) {
    return !!(node && (node.nodeType === ELEMENT_NODE || node.nodeType === DOCUMENT_NODE || node.nodeType === DOCUMENT_FRAGMENT_NODE || node.nodeType === COMMENT_NODE && node.nodeValue === ' react-mount-point-unstable '));
  }
  
  function getReactRootElementInContainer(container) {
    if (!container) {
      return null;
    }
  
    if (container.nodeType === DOCUMENT_NODE) {
      return container.documentElement;
    } else {
      return container.firstChild;
    }
  }
  
  function shouldHydrateDueToLegacyHeuristic(container) {
    var rootElement = getReactRootElementInContainer(container);
    return !!(rootElement && rootElement.nodeType === ELEMENT_NODE && rootElement.hasAttribute(ROOT_ATTRIBUTE_NAME));
  }
  
  function shouldAutoFocusHostComponent(type, props) {
    switch (type) {
      case 'button':
      case 'input':
      case 'select':
      case 'textarea':
        return !!props.autoFocus;
    }
    return false;
  }
  
  var DOMRenderer = reactReconciler({
    getRootHostContext: function (rootContainerInstance) {
      var type = void 0;
      var namespace = void 0;
      var nodeType = rootContainerInstance.nodeType;
      switch (nodeType) {
        case DOCUMENT_NODE:
        case DOCUMENT_FRAGMENT_NODE:
          {
            type = nodeType === DOCUMENT_NODE ? '#document' : '#fragment';
            var root = rootContainerInstance.documentElement;
            namespace = root ? root.namespaceURI : getChildNamespace(null, '');
            break;
          }
        default:
          {
            var container = nodeType === COMMENT_NODE ? rootContainerInstance.parentNode : rootContainerInstance;
            var ownNamespace = container.namespaceURI || null;
            type = container.tagName;
            namespace = getChildNamespace(ownNamespace, type);
            break;
          }
      }
      {
        var validatedTag = type.toLowerCase();
        var _ancestorInfo = updatedAncestorInfo(null, validatedTag, null);
        return { namespace: namespace, ancestorInfo: _ancestorInfo };
      }
      return namespace;
    },
    getChildHostContext: function (parentHostContext, type) {
      {
        var parentHostContextDev = parentHostContext;
        var _namespace = getChildNamespace(parentHostContextDev.namespace, type);
        var _ancestorInfo2 = updatedAncestorInfo(parentHostContextDev.ancestorInfo, type, null);
        return { namespace: _namespace, ancestorInfo: _ancestorInfo2 };
      }
      var parentNamespace = parentHostContext;
      return getChildNamespace(parentNamespace, type);
    },
    getPublicInstance: function (instance) {
      return instance;
    },
    prepareForCommit: function () {
      eventsEnabled = isEnabled();
      selectionInformation = getSelectionInformation();
      setEnabled(false);
    },
    resetAfterCommit: function () {
      restoreSelection(selectionInformation);
      selectionInformation = null;
      setEnabled(eventsEnabled);
      eventsEnabled = null;
    },
    createInstance: function (type, props, rootContainerInstance, hostContext, internalInstanceHandle) {
      var parentNamespace = void 0;
      {
        // TODO: take namespace into account when validating.
        var hostContextDev = hostContext;
        validateDOMNesting$1(type, null, hostContextDev.ancestorInfo);
        if (typeof props.children === 'string' || typeof props.children === 'number') {
          var string = '' + props.children;
          var ownAncestorInfo = updatedAncestorInfo(hostContextDev.ancestorInfo, type, null);
          validateDOMNesting$1(null, string, ownAncestorInfo);
        }
        parentNamespace = hostContextDev.namespace;
      }
      var domElement = createElement(type, props, rootContainerInstance, parentNamespace);
      precacheFiberNode(internalInstanceHandle, domElement);
      updateFiberProps(domElement, props);
      return domElement;
    },
    appendInitialChild: function (parentInstance, child) {
      parentInstance.appendChild(child);
    },
    finalizeInitialChildren: function (domElement, type, props, rootContainerInstance) {
      setInitialProperties(domElement, type, props, rootContainerInstance);
      return shouldAutoFocusHostComponent(type, props);
    },
    prepareUpdate: function (domElement, type, oldProps, newProps, rootContainerInstance, hostContext) {
      {
        var hostContextDev = hostContext;
        if (typeof newProps.children !== typeof oldProps.children && (typeof newProps.children === 'string' || typeof newProps.children === 'number')) {
          var string = '' + newProps.children;
          var ownAncestorInfo = updatedAncestorInfo(hostContextDev.ancestorInfo, type, null);
          validateDOMNesting$1(null, string, ownAncestorInfo);
        }
      }
      return diffProperties(domElement, type, oldProps, newProps, rootContainerInstance);
    },
    shouldSetTextContent: function (type, props) {
      return type === 'textarea' || typeof props.children === 'string' || typeof props.children === 'number' || typeof props.dangerouslySetInnerHTML === 'object' && props.dangerouslySetInnerHTML !== null && typeof props.dangerouslySetInnerHTML.__html === 'string';
    },
    shouldDeprioritizeSubtree: function (type, props) {
      return !!props.hidden;
    },
    createTextInstance: function (text, rootContainerInstance, hostContext, internalInstanceHandle) {
      {
        var hostContextDev = hostContext;
        validateDOMNesting$1(null, text, hostContextDev.ancestorInfo);
      }
      var textNode = createTextNode(text, rootContainerInstance);
      precacheFiberNode(internalInstanceHandle, textNode);
      return textNode;
    },
  
  
    now: now,
  
    mutation: {
      commitMount: function (domElement, type, newProps, internalInstanceHandle) {
        domElement.focus();
      },
      commitUpdate: function (domElement, updatePayload, type, oldProps, newProps, internalInstanceHandle) {
        // Update the props handle so that we know which props are the ones with
        // with current event handlers.
        updateFiberProps(domElement, newProps);
        // Apply the diff to the DOM node.
        updateProperties(domElement, updatePayload, type, oldProps, newProps);
      },
      resetTextContent: function (domElement) {
        domElement.textContent = '';
      },
      commitTextUpdate: function (textInstance, oldText, newText) {
        textInstance.nodeValue = newText;
      },
      appendChild: function (parentInstance, child) {
        parentInstance.appendChild(child);
      },
      appendChildToContainer: function (container, child) {
        if (container.nodeType === COMMENT_NODE) {
          container.parentNode.insertBefore(child, container);
        } else {
          container.appendChild(child);
        }
      },
      insertBefore: function (parentInstance, child, beforeChild) {
        parentInstance.insertBefore(child, beforeChild);
      },
      insertInContainerBefore: function (container, child, beforeChild) {
        if (container.nodeType === COMMENT_NODE) {
          container.parentNode.insertBefore(child, beforeChild);
        } else {
          container.insertBefore(child, beforeChild);
        }
      },
      removeChild: function (parentInstance, child) {
        parentInstance.removeChild(child);
      },
      removeChildFromContainer: function (container, child) {
        if (container.nodeType === COMMENT_NODE) {
          container.parentNode.removeChild(child);
        } else {
          container.removeChild(child);
        }
      }
    },
  
    hydration: {
      canHydrateInstance: function (instance, type, props) {
        if (instance.nodeType !== ELEMENT_NODE || type.toLowerCase() !== instance.nodeName.toLowerCase()) {
          return null;
        }
        // This has now been refined to an element node.
        return instance;
      },
      canHydrateTextInstance: function (instance, text) {
        if (text === '' || instance.nodeType !== TEXT_NODE) {
          // Empty strings are not parsed by HTML so there won't be a correct match here.
          return null;
        }
        // This has now been refined to a text node.
        return instance;
      },
      getNextHydratableSibling: function (instance) {
        var node = instance.nextSibling;
        // Skip non-hydratable nodes.
        while (node && node.nodeType !== ELEMENT_NODE && node.nodeType !== TEXT_NODE) {
          node = node.nextSibling;
        }
        return node;
      },
      getFirstHydratableChild: function (parentInstance) {
        var next = parentInstance.firstChild;
        // Skip non-hydratable nodes.
        while (next && next.nodeType !== ELEMENT_NODE && next.nodeType !== TEXT_NODE) {
          next = next.nextSibling;
        }
        return next;
      },
      hydrateInstance: function (instance, type, props, rootContainerInstance, hostContext, internalInstanceHandle) {
        precacheFiberNode(internalInstanceHandle, instance);
        // TODO: Possibly defer this until the commit phase where all the events
        // get attached.
        updateFiberProps(instance, props);
        var parentNamespace = void 0;
        {
          var hostContextDev = hostContext;
          parentNamespace = hostContextDev.namespace;
        }
        return diffHydratedProperties(instance, type, props, parentNamespace, rootContainerInstance);
      },
      hydrateTextInstance: function (textInstance, text, internalInstanceHandle) {
        precacheFiberNode(internalInstanceHandle, textInstance);
        return diffHydratedText(textInstance, text);
      },
      didNotMatchHydratedContainerTextInstance: function (parentContainer, textInstance, text) {
        {
          warnForUnmatchedText(textInstance, text);
        }
      },
      didNotMatchHydratedTextInstance: function (parentType, parentProps, parentInstance, textInstance, text) {
        if (true && parentProps[SUPPRESS_HYDRATION_WARNING] !== true) {
          warnForUnmatchedText(textInstance, text);
        }
      },
      didNotHydrateContainerInstance: function (parentContainer, instance) {
        {
          if (instance.nodeType === 1) {
            warnForDeletedHydratableElement(parentContainer, instance);
          } else {
            warnForDeletedHydratableText(parentContainer, instance);
          }
        }
      },
      didNotHydrateInstance: function (parentType, parentProps, parentInstance, instance) {
        if (true && parentProps[SUPPRESS_HYDRATION_WARNING] !== true) {
          if (instance.nodeType === 1) {
            warnForDeletedHydratableElement(parentInstance, instance);
          } else {
            warnForDeletedHydratableText(parentInstance, instance);
          }
        }
      },
      didNotFindHydratableContainerInstance: function (parentContainer, type, props) {
        {
          warnForInsertedHydratedElement(parentContainer, type, props);
        }
      },
      didNotFindHydratableContainerTextInstance: function (parentContainer, text) {
        {
          warnForInsertedHydratedText(parentContainer, text);
        }
      },
      didNotFindHydratableInstance: function (parentType, parentProps, parentInstance, type, props) {
        if (true && parentProps[SUPPRESS_HYDRATION_WARNING] !== true) {
          warnForInsertedHydratedElement(parentInstance, type, props);
        }
      },
      didNotFindHydratableTextInstance: function (parentType, parentProps, parentInstance, text) {
        if (true && parentProps[SUPPRESS_HYDRATION_WARNING] !== true) {
          warnForInsertedHydratedText(parentInstance, text);
        }
      }
    },
  
    scheduleDeferredCallback: rIC,
  
    useSyncScheduling: !enableAsyncSchedulingByDefaultInReactDOM
  });
  
  injection$4.injectFiberBatchedUpdates(DOMRenderer.batchedUpdates);
  
  var warnedAboutHydrateAPI = false;
  
  function renderSubtreeIntoContainer(parentComponent, children, container, forceHydrate, callback) {
    !isValidContainer(container) ? invariant_1$1(false, 'Target container is not a DOM element.') : void 0;
  
    {
      if (container._reactRootContainer && container.nodeType !== COMMENT_NODE) {
        var hostInstance = DOMRenderer.findHostInstanceWithNoPortals(container._reactRootContainer.current);
        if (hostInstance) {
          warning_1$1(hostInstance.parentNode === container, 'render(...): It looks like the React-rendered content of this ' + 'container was removed without using React. This is not ' + 'supported and will cause errors. Instead, call ' + 'ReactDOM.unmountComponentAtNode to empty a container.');
        }
      }
  
      var isRootRenderedBySomeReact = !!container._reactRootContainer;
      var rootEl = getReactRootElementInContainer(container);
      var hasNonRootReactChild = !!(rootEl && getInstanceFromNode$1(rootEl));
  
      warning_1$1(!hasNonRootReactChild || isRootRenderedBySomeReact, 'render(...): Replacing React-rendered children with a new root ' + 'component. If you intended to update the children of this node, ' + 'you should instead have the existing children update their state ' + 'and render the new components instead of calling ReactDOM.render.');
  
      warning_1$1(container.nodeType !== ELEMENT_NODE || !container.tagName || container.tagName.toUpperCase() !== 'BODY', 'render(): Rendering components directly into document.body is ' + 'discouraged, since its children are often manipulated by third-party ' + 'scripts and browser extensions. This may lead to subtle ' + 'reconciliation issues. Try rendering into a container element created ' + 'for your app.');
    }
  
    var root = container._reactRootContainer;
    if (!root) {
      var shouldHydrate = forceHydrate || shouldHydrateDueToLegacyHeuristic(container);
      // First clear any existing content.
      if (!shouldHydrate) {
        var warned = false;
        var rootSibling = void 0;
        while (rootSibling = container.lastChild) {
          {
            if (!warned && rootSibling.nodeType === ELEMENT_NODE && rootSibling.hasAttribute(ROOT_ATTRIBUTE_NAME)) {
              warned = true;
              warning_1$1(false, 'render(): Target node has markup rendered by React, but there ' + 'are unrelated nodes as well. This is most commonly caused by ' + 'white-space inserted around server-rendered markup.');
            }
          }
          container.removeChild(rootSibling);
        }
      }
      {
        if (shouldHydrate && !forceHydrate && !warnedAboutHydrateAPI) {
          warnedAboutHydrateAPI = true;
          lowPriorityWarning$1(false, 'render(): Calling ReactDOM.render() to hydrate server-rendered markup ' + 'will stop working in React v17. Replace the ReactDOM.render() call ' + 'with ReactDOM.hydrate() if you want React to attach to the server HTML.');
        }
      }
      var newRoot = DOMRenderer.createContainer(container, shouldHydrate);
      root = container._reactRootContainer = newRoot;
      // Initial mount should not be batched.
      DOMRenderer.unbatchedUpdates(function () {
        DOMRenderer.updateContainer(children, newRoot, parentComponent, callback);
      });
    } else {
      DOMRenderer.updateContainer(children, root, parentComponent, callback);
    }
    return DOMRenderer.getPublicRootInstance(root);
  }
  
  function createPortal(children, container) {
    var key = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : null;
  
    !isValidContainer(container) ? invariant_1$1(false, 'Target container is not a DOM element.') : void 0;
    // TODO: pass ReactDOM portal implementation as third argument
    return createPortal$1(children, container, null, key);
  }
  
  function ReactRoot(container, hydrate) {
    var root = DOMRenderer.createContainer(container, hydrate);
    this._reactRootContainer = root;
  }
  ReactRoot.prototype.render = function (children, callback) {
    var root = this._reactRootContainer;
    DOMRenderer.updateContainer(children, root, null, callback);
  };
  ReactRoot.prototype.unmount = function (callback) {
    var root = this._reactRootContainer;
    DOMRenderer.updateContainer(null, root, null, callback);
  };
  
  var ReactDOM = {
    createPortal: createPortal,
  
    findDOMNode: function (componentOrElement) {
      {
        var owner = ReactCurrentOwner.current;
        if (owner !== null) {
          var warnedAboutRefsInRender = owner.stateNode._warnedAboutRefsInRender;
          warning_1$1(warnedAboutRefsInRender, '%s is accessing findDOMNode inside its render(). ' + 'render() should be a pure function of props and state. It should ' + 'never access something that requires stale data from the previous ' + 'render, such as refs. Move this logic to componentDidMount and ' + 'componentDidUpdate instead.', getComponentName(owner) || 'A component');
          owner.stateNode._warnedAboutRefsInRender = true;
        }
      }
      if (componentOrElement == null) {
        return null;
      }
      if (componentOrElement.nodeType === ELEMENT_NODE) {
        return componentOrElement;
      }
  
      var inst = get(componentOrElement);
      if (inst) {
        return DOMRenderer.findHostInstance(inst);
      }
  
      if (typeof componentOrElement.render === 'function') {
        invariant_1$1(false, 'Unable to find node on an unmounted component.');
      } else {
        invariant_1$1(false, 'Element appears to be neither ReactComponent nor DOMNode. Keys: %s', Object.keys(componentOrElement));
      }
    },
    hydrate: function (element, container, callback) {
      // TODO: throw or warn if we couldn't hydrate?
      return renderSubtreeIntoContainer(null, element, container, true, callback);
    },
    render: function (element, container, callback) {
      return renderSubtreeIntoContainer(null, element, container, false, callback);
    },
    unstable_renderSubtreeIntoContainer: function (parentComponent, element, containerNode, callback) {
      !(parentComponent != null && has(parentComponent)) ? invariant_1$1(false, 'parentComponent must be a valid React Component') : void 0;
      return renderSubtreeIntoContainer(parentComponent, element, containerNode, false, callback);
    },
    unmountComponentAtNode: function (container) {
      !isValidContainer(container) ? invariant_1$1(false, 'unmountComponentAtNode(...): Target container is not a DOM element.') : void 0;
  
      if (container._reactRootContainer) {
        {
          var rootEl = getReactRootElementInContainer(container);
          var renderedByDifferentReact = rootEl && !getInstanceFromNode$1(rootEl);
          warning_1$1(!renderedByDifferentReact, "unmountComponentAtNode(): The node you're attempting to unmount " + 'was rendered by another copy of React.');
        }
  
        // Unmount should not be batched.
        DOMRenderer.unbatchedUpdates(function () {
          renderSubtreeIntoContainer(null, null, container, false, function () {
            container._reactRootContainer = null;
          });
        });
        // If you call unmountComponentAtNode twice in quick succession, you'll
        // get `true` twice. That's probably fine?
        return true;
      } else {
        {
          var _rootEl = getReactRootElementInContainer(container);
          var hasNonRootReactChild = !!(_rootEl && getInstanceFromNode$1(_rootEl));
  
          // Check if the container itself is a React root node.
          var isContainerReactRoot = container.nodeType === 1 && isValidContainer(container.parentNode) && !!container.parentNode._reactRootContainer;
  
          warning_1$1(!hasNonRootReactChild, "unmountComponentAtNode(): The node you're attempting to unmount " + 'was rendered by React and is not a top-level container. %s', isContainerReactRoot ? 'You may have accidentally passed in a React root node instead ' + 'of its container.' : 'Instead, have the parent component update its state and ' + 'rerender in order to remove this component.');
        }
  
        return false;
      }
    },
  
  
    // Temporary alias since we already shipped React 16 RC with it.
    // TODO: remove in React 17.
    unstable_createPortal: createPortal,
  
    unstable_batchedUpdates: batchedUpdates,
  
    unstable_deferredUpdates: DOMRenderer.deferredUpdates,
  
    flushSync: DOMRenderer.flushSync,
  
    __SECRET_INTERNALS_DO_NOT_USE_OR_YOU_WILL_BE_FIRED: {
      // For TapEventPlugin which is popular in open source
      EventPluginHub: EventPluginHub,
      // Used by test-utils
      EventPluginRegistry: EventPluginRegistry,
      EventPropagators: EventPropagators,
      ReactControlledComponent: ReactControlledComponent,
      ReactDOMComponentTree: ReactDOMComponentTree,
      ReactDOMEventListener: ReactDOMEventListener
    }
  };
  
  if (enableCreateRoot) {
    ReactDOM.createRoot = function createRoot(container, options) {
      var hydrate = options != null && options.hydrate === true;
      return new ReactRoot(container, hydrate);
    };
  }
  
  var foundDevTools = DOMRenderer.injectIntoDevTools({
    findFiberByHostInstance: getClosestInstanceFromNode,
    bundleType: 1,
    version: ReactVersion,
    rendererPackageName: 'react-dom'
  });
  
  {
    if (!foundDevTools && ExecutionEnvironment_1.canUseDOM && window.top === window.self) {
      // If we're in Chrome or Firefox, provide a download link if not installed.
      if (navigator.userAgent.indexOf('Chrome') > -1 && navigator.userAgent.indexOf('Edge') === -1 || navigator.userAgent.indexOf('Firefox') > -1) {
        var protocol = window.location.protocol;
        // Don't warn in exotic cases like chrome-extension://.
        if (/^(https?|file):$/.test(protocol)) {
          console.info('%cDownload the React DevTools ' + 'for a better development experience: ' + 'https://fb.me/react-devtools' + (protocol === 'file:' ? '\nYou might need to use a local HTTP server (instead of file://): ' + 'https://fb.me/react-devtools-faq' : ''), 'font-weight:bold');
        }
      }
    }
  }
  
  
  
  var ReactDOM$2 = Object.freeze({
  	default: ReactDOM
  });
  
  var ReactDOM$3 = ( ReactDOM$2 && ReactDOM ) || ReactDOM$2;
  
  // TODO: decide on the top-level export form.
  // This is hacky but makes it work with both Rollup and Jest.
  var reactDom = ReactDOM$3['default'] ? ReactDOM$3['default'] : ReactDOM$3;
  
  return reactDom;
  
  })));
  