text: (function (global, factory) {
  	typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports) :
  	typeof define === 'function' && define.amd ? define(['exports'], factory) :
  	(factory((global.esriLoader = global.esriLoader || {})));
  }(this, (function (exports) { 'use strict';
  
  /* Copyright (c) 2017 Environmental Systems Research Institute, Inc.
   * Apache-2.0 */
  var DEFAULT_VERSION = '4.17';
  var NEXT = 'next';
  function parseVersion(version) {
      if (version.toLowerCase() === NEXT) {
          return NEXT;
      }
      var match = version && version.match(/^(\d)\.(\d+)/);
      return match && {
          major: parseInt(match[1], 10),
          minor: parseInt(match[2], 10)
      };
  }
  /**
   * Get the CDN url for a given version
   *
   * @param version Ex: '4.17' or '3.34'. Defaults to the latest 4.x version.
   */
  function getCdnUrl(version) {
      if (version === void 0) { version = DEFAULT_VERSION; }
      return "https://js.arcgis.com/" + version + "/";
  }
  /**
   * Get the CDN url for a the CSS for a given version and/or theme
   *
   * @param version Ex: '4.17', '3.34', or 'next'. Defaults to the latest 4.x version.
   */
  function getCdnCssUrl(version) {
      if (version === void 0) { version = DEFAULT_VERSION; }
      var baseUrl = getCdnUrl(version);
      var parsedVersion = parseVersion(version);
      if (parsedVersion !== NEXT && parsedVersion.major === 3) {
          // NOTE: at 3.11 the CSS moved from the /js folder to the root
          var path = parsedVersion.minor <= 10 ? 'js/' : '';
          return "" + baseUrl + path + "esri/css/esri.css";
      }
      else {
          // assume 4.x
          return baseUrl + "esri/themes/light/main.css";
      }
  }
  
  /* Copyright (c) 2017 Environmental Systems Research Institute, Inc.
   * Apache-2.0 */
  function createStylesheetLink(href) {
      var link = document.createElement('link');
      link.rel = 'stylesheet';
      link.href = href;
      return link;
  }
  function insertLink(link, before) {
      if (before) {
          // the link should be inserted before a specific node
          var beforeNode = document.querySelector(before);
          beforeNode.parentNode.insertBefore(link, beforeNode);
      }
      else {
          // append the link to then end of the head tag
          document.head.appendChild(link);
      }
  }
  // check if the css url has been injected or added manually
  function getCss(url) {
      return document.querySelector("link[href*=\"" + url + "\"]");
  }
  function getCssUrl(urlOrVersion) {
      return !urlOrVersion || parseVersion(urlOrVersion)
          // if it's a valid version string return the CDN URL
          ? getCdnCssUrl(urlOrVersion)
          // otherwise assume it's a URL and return that
          : urlOrVersion;
  }
  // lazy load the CSS needed for the ArcGIS API
  function loadCss(urlOrVersion, before) {
      var url = getCssUrl(urlOrVersion);
      var link = getCss(url);
      if (!link) {
          // create & load the css link
          link = createStylesheetLink(url);
          insertLink(link, before);
      }
      return link;
  }
  
  /* Copyright (c) 2017 Environmental Systems Research Institute, Inc.
   * Apache-2.0 */
  var isBrowser = typeof window !== 'undefined';
  // allow consuming libraries to provide their own Promise implementations
  var utils = {
      Promise: isBrowser ? window['Promise'] : undefined
  };
  
  /* Copyright (c) 2017 Environmental Systems Research Institute, Inc.
   * Apache-2.0 */
  var defaultOptions = {};
  function createScript(url) {
      var script = document.createElement('script');
      script.type = 'text/javascript';
      script.src = url;
      script.setAttribute('data-esri-loader', 'loading');
      return script;
  }
  // add a one-time load handler to script
  // and optionally add a one time error handler as well
  function handleScriptLoad(script, callback, errback) {
      var onScriptError;
      if (errback) {
          // set up an error handler as well
          onScriptError = handleScriptError(script, errback);
      }
      var onScriptLoad = function () {
          // pass the script to the callback
          callback(script);
          // remove this event listener
          script.removeEventListener('load', onScriptLoad, false);
          if (onScriptError) {
              // remove the error listener as well
              script.removeEventListener('error', onScriptError, false);
          }
      };
      script.addEventListener('load', onScriptLoad, false);
  }
  // add a one-time error handler to the script
  function handleScriptError(script, callback) {
      var onScriptError = function (e) {
          // reject the promise and remove this event listener
          callback(e.error || new Error("There was an error attempting to load " + script.src));
          // remove this event listener
          script.removeEventListener('error', onScriptError, false);
      };
      script.addEventListener('error', onScriptError, false);
      return onScriptError;
  }
  // allow the user to configure default script options rather than passing options to `loadModules` each time
  function setDefaultOptions(options) {
      if (options === void 0) { options = {}; }
      defaultOptions = options;
  }
  // get the script injected by this library
  function getScript() {
      return document.querySelector('script[data-esri-loader]');
  }
  // has ArcGIS API been loaded on the page yet?
  function isLoaded() {
      var globalRequire = window['require'];
      // .on() ensures that it's Dojo's AMD loader
      return globalRequire && globalRequire.on;
  }
  // load the ArcGIS API on the page
  function loadScript(options) {
      if (options === void 0) { options = {}; }
      // we would have liked to use spread like { ...defaultOptions, ...options }
      // but TS would inject a polyfill that would require use to configure rollup w content: 'window'
      // if we have another occasion to use spread, let'd do that and replace this for...in
      var opts = {};
      [defaultOptions, options].forEach(function (obj) {
          for (var prop in obj) {
              if (Object.prototype.hasOwnProperty.call(obj, prop)) {
                  opts[prop] = obj[prop];
              }
          }
      });
      // URL to load
      var version = opts.version;
      var url = opts.url || getCdnUrl(version);
      return new utils.Promise(function (resolve, reject) {
          var script = getScript();
          if (script) {
              // the API is already loaded or in the process of loading...
              // NOTE: have to test against scr attribute value, not script.src
              // b/c the latter will return the full url for relative paths
              var src = script.getAttribute('src');
              if (src !== url) {
                  // potentially trying to load a different version of the API
                  reject(new Error("The ArcGIS API for JavaScript is already loaded (" + src + ")."));
              }
              else {
                  if (isLoaded()) {
                      // the script has already successfully loaded
                      resolve(script);
                  }
                  else {
                      // wait for the script to load and then resolve
                      handleScriptLoad(script, resolve, reject);
                  }
              }
          }
          else {
              if (isLoaded()) {
                  // the API has been loaded by some other means
                  // potentially trying to load a different version of the API
                  reject(new Error("The ArcGIS API for JavaScript is already loaded."));
              }
              else {
                  // this is the first time attempting to load the API
                  var css = opts.css;
                  if (css) {
                      var useVersion = css === true;
                      // load the css before loading the script
                      loadCss(useVersion ? version : css, opts.insertCssBefore);
                  }
                  if (opts.dojoConfig) {
                      // set dojo configuration parameters before loading the script
                      window['dojoConfig'] = opts.dojoConfig;
                  }
                  // create a script object whose source points to the API
                  script = createScript(url);
                  // _currentUrl = url;
                  // once the script is loaded...
                  handleScriptLoad(script, function () {
                      // update the status of the script
                      script.setAttribute('data-esri-loader', 'loaded');
                      // return the script
                      resolve(script);
                  }, reject);
                  // load the script
                  document.body.appendChild(script);
              }
          }
      });
  }
  
  /* Copyright (c) 2017 Environmental Systems Research Institute, Inc.
   * Apache-2.0 */
  // wrap Dojo's require() in a promise
  function requireModules(modules) {
      return new utils.Promise(function (resolve, reject) {
          // If something goes wrong loading the esri/dojo scripts, reject with the error.
          var errorHandler = window['require'].on('error', reject);
          window['require'](modules, function () {
              var args = [];
              for (var _i = 0; _i < arguments.length; _i++) {
                  args[_i] = arguments[_i];
              }
              // remove error handler
              errorHandler.remove();
              // Resolve with the parameters from dojo require as an array.
              resolve(args);
          });
      });
  }
  // returns a promise that resolves with an array of the required modules
  // also will attempt to lazy load the ArcGIS API if it has not already been loaded
  function loadModules(modules, loadScriptOptions) {
      if (loadScriptOptions === void 0) { loadScriptOptions = {}; }
      if (!isLoaded()) {
          // script is not yet loaded, is it in the process of loading?
          var script = getScript();
          var src = script && script.getAttribute('src');
          if (!loadScriptOptions.url && src) {
              // script is still loading and user did not specify a URL
              // in this case we want to default to the URL that's being loaded
              // instead of defaulting to the latest 4.x URL
              loadScriptOptions.url = src;
          }
          // attempt to load the script then load the modules
          return loadScript(loadScriptOptions).then(function () { return requireModules(modules); });
      }
      else {
          // script is already loaded, just load the modules
          return requireModules(modules);
      }
  }
  
  /*
    Copyright (c) 2017 Esri
    Licensed under the Apache License, Version 2.0 (the "License");
    you may not use this file except in compliance with the License.
    You may obtain a copy of the License at
      http://www.apache.org/licenses/LICENSE-2.0
    Unless required by applicable law or agreed to in writing, software
    distributed under the License is distributed on an "AS IS" BASIS,
    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    See the License for the specific language governing permissions and
    limitations under the License.
  */
  // re-export the functions that are part of the public API
  // NOTE: rollup ignores the default export
  // and builds the UMD namespace out of the above named exports
  // so this is only needed so that consumers of the ESM build
  // can do esriLoader.loadModules(), etc
  // TODO: remove this next breaking change
  var esriLoader = {
      getScript: getScript,
      isLoaded: isLoaded,
      loadModules: loadModules,
      loadScript: loadScript,
      loadCss: loadCss,
      setDefaultOptions: setDefaultOptions,
      utils: utils
  };
  
  exports.getScript = getScript;
  exports.isLoaded = isLoaded;
  exports.loadModules = loadModules;
  exports.loadScript = loadScript;
  exports.loadCss = loadCss;
  exports.setDefaultOptions = setDefaultOptions;
  exports.utils = utils;
  exports['default'] = esriLoader;
  
  Object.defineProperty(exports, '__esModule', { value: true });
  
  })));
  //# sourceMappingURL=esri-loader.js.map
  