text: /**
   * --------------------------------------------------------------------------
   * Bootstrap (v5.0.0-beta1): dropdown.js
   * Licensed under MIT (https://github.com/twbs/bootstrap/blob/main/LICENSE)
   * --------------------------------------------------------------------------
   */
  
  import * as Popper from '@popperjs/core';
  
  import {
    getjQuery,
    onDOMContentLoaded,
    getElementFromSelector,
    isElement,
    isVisible,
    isRTL,
    noop,
    typeCheckConfig,
  } from './util/index';
  import Data from './dom/data';
  import EventHandler from './dom/event-handler';
  import Manipulator from './dom/manipulator';
  import SelectorEngine from './dom/selector-engine';
  import BaseComponent from './base-component';
  
  /**
   * ------------------------------------------------------------------------
   * Constants
   * ------------------------------------------------------------------------
   */
  
  const NAME = 'dropdown';
  const DATA_KEY = 'bs.dropdown';
  const EVENT_KEY = `.${DATA_KEY}`;
  const DATA_API_KEY = '.data-api';
  
  const ESCAPE_KEY = 'Escape';
  const SPACE_KEY = 'Space';
  const TAB_KEY = 'Tab';
  const ARROW_UP_KEY = 'ArrowUp';
  const ARROW_DOWN_KEY = 'ArrowDown';
  const RIGHT_MOUSE_BUTTON = 2; // MouseEvent.button value for the secondary button, usually the right button
  
  const REGEXP_KEYDOWN = new RegExp(`${ARROW_UP_KEY}|${ARROW_DOWN_KEY}|${ESCAPE_KEY}`);
  
  const EVENT_HIDE = `hide${EVENT_KEY}`;
  const EVENT_HIDDEN = `hidden${EVENT_KEY}`;
  const EVENT_SHOW = `show${EVENT_KEY}`;
  const EVENT_SHOWN = `shown${EVENT_KEY}`;
  const EVENT_CLICK = `click${EVENT_KEY}`;
  const EVENT_CLICK_DATA_API = `click${EVENT_KEY}${DATA_API_KEY}`;
  const EVENT_KEYDOWN_DATA_API = `keydown${EVENT_KEY}${DATA_API_KEY}`;
  const EVENT_KEYUP_DATA_API = `keyup${EVENT_KEY}${DATA_API_KEY}`;
  
  const CLASS_NAME_DISABLED = 'disabled';
  const CLASS_NAME_SHOW = 'show';
  const CLASS_NAME_DROPUP = 'dropup';
  const CLASS_NAME_DROPEND = 'dropend';
  const CLASS_NAME_DROPSTART = 'dropstart';
  const CLASS_NAME_NAVBAR = 'navbar';
  
  const SELECTOR_DATA_TOGGLE = '[data-bs-toggle="dropdown"]';
  const SELECTOR_FORM_CHILD = '.dropdown form';
  const SELECTOR_MENU = '.dropdown-menu';
  const SELECTOR_NAVBAR_NAV = '.navbar-nav';
  const SELECTOR_VISIBLE_ITEMS = '.dropdown-menu .dropdown-item:not(.disabled):not(:disabled)';
  
  const PLACEMENT_TOP = isRTL ? 'top-end' : 'top-start';
  const PLACEMENT_TOPEND = isRTL ? 'top-start' : 'top-end';
  const PLACEMENT_BOTTOM = isRTL ? 'bottom-end' : 'bottom-start';
  const PLACEMENT_BOTTOMEND = isRTL ? 'bottom-start' : 'bottom-end';
  const PLACEMENT_RIGHT = isRTL ? 'left-start' : 'right-start';
  const PLACEMENT_LEFT = isRTL ? 'right-start' : 'left-start';
  
  const Default = {
    offset: 0,
    flip: true,
    boundary: 'clippingParents',
    reference: 'toggle',
    display: 'dynamic',
    popperConfig: null,
  };
  
  const DefaultType = {
    offset: '(number|string|function)',
    flip: 'boolean',
    boundary: '(string|element)',
    reference: '(string|element)',
    display: 'string',
    popperConfig: '(null|object)',
  };
  
  /**
   * ------------------------------------------------------------------------
   * Class Definition
   * ------------------------------------------------------------------------
   */
  
  class Dropdown extends BaseComponent {
    constructor(element, config) {
      super(element);
  
      this._popper = null;
      this._config = this._getConfig(config);
      this._menu = this._getMenuElement();
      this._inNavbar = this._detectNavbar();
  
      this._addEventListeners();
    }
  
    // Getters
  
    static get Default() {
      return Default;
    }
  
    static get DefaultType() {
      return DefaultType;
    }
  
    static get DATA_KEY() {
      return DATA_KEY;
    }
  
    // Public
  
    toggle() {
      if (this._element.disabled || this._element.classList.contains(CLASS_NAME_DISABLED)) {
        return;
      }
  
      const isActive = this._element.classList.contains(CLASS_NAME_SHOW);
  
      Dropdown.clearMenus();
  
      if (isActive) {
        return;
      }
  
      this.show();
    }
  
    show() {
      if (
        this._element.disabled ||
        this._element.classList.contains(CLASS_NAME_DISABLED) ||
        this._menu.classList.contains(CLASS_NAME_SHOW)
      ) {
        return;
      }
  
      const parent = Dropdown.getParentFromElement(this._element);
      const relatedTarget = {
        relatedTarget: this._element,
      };
  
      const showEvent = EventHandler.trigger(this._element, EVENT_SHOW, relatedTarget);
  
      if (showEvent.defaultPrevented) {
        return;
      }
  
      // Totally disable Popper for Dropdowns in Navbar
      if (!this._inNavbar) {
        if (typeof Popper === 'undefined') {
          throw new TypeError("Bootstrap's dropdowns require Popper (https://popper.js.org)");
        }
  
        let referenceElement = this._element;
  
        if (this._config.reference === 'parent') {
          referenceElement = parent;
        } else if (isElement(this._config.reference)) {
          referenceElement = this._config.reference;
  
          // Check if it's jQuery element
          if (typeof this._config.reference.jquery !== 'undefined') {
            referenceElement = this._config.reference[0];
          }
        }
  
        this._popper = Popper.createPopper(referenceElement, this._menu, this._getPopperConfig());
      }
  
      // If this is a touch-enabled device we add extra
      // empty mouseover listeners to the body's immediate children;
      // only needed because of broken event delegation on iOS
      // https://www.quirksmode.org/blog/archives/2014/02/mouse_event_bub.html
      if ('ontouchstart' in document.documentElement && !parent.closest(SELECTOR_NAVBAR_NAV)) {
        []
          .concat(...document.body.children)
          .forEach((elem) => EventHandler.on(elem, 'mouseover', null, noop()));
      }
  
      this._element.focus();
      this._element.setAttribute('aria-expanded', true);
  
      this._menu.classList.toggle(CLASS_NAME_SHOW);
      this._element.classList.toggle(CLASS_NAME_SHOW);
      EventHandler.trigger(parent, EVENT_SHOWN, relatedTarget);
    }
  
    hide() {
      if (
        this._element.disabled ||
        this._element.classList.contains(CLASS_NAME_DISABLED) ||
        !this._menu.classList.contains(CLASS_NAME_SHOW)
      ) {
        return;
      }
  
      const parent = Dropdown.getParentFromElement(this._element);
      const relatedTarget = {
        relatedTarget: this._element,
      };
  
      const hideEvent = EventHandler.trigger(parent, EVENT_HIDE, relatedTarget);
  
      if (hideEvent.defaultPrevented) {
        return;
      }
  
      if (this._popper) {
        this._popper.destroy();
      }
  
      this._menu.classList.toggle(CLASS_NAME_SHOW);
      this._element.classList.toggle(CLASS_NAME_SHOW);
      EventHandler.trigger(parent, EVENT_HIDDEN, relatedTarget);
    }
  
    dispose() {
      super.dispose();
      EventHandler.off(this._element, EVENT_KEY);
      this._menu = null;
  
      if (this._popper) {
        this._popper.destroy();
        this._popper = null;
      }
    }
  
    update() {
      this._inNavbar = this._detectNavbar();
      if (this._popper) {
        this._popper.update();
      }
    }
  
    // Private
  
    _addEventListeners() {
      EventHandler.on(this._element, EVENT_CLICK, (event) => {
        event.preventDefault();
        event.stopPropagation();
        this.toggle();
      });
    }
  
    _getConfig(config) {
      config = {
        ...this.constructor.Default,
        ...Manipulator.getDataAttributes(this._element),
        ...config,
      };
  
      typeCheckConfig(NAME, config, this.constructor.DefaultType);
  
      return config;
    }
  
    _getMenuElement() {
      return SelectorEngine.next(this._element, SELECTOR_MENU)[0];
    }
  
    _getPlacement() {
      const parentDropdown = this._element.parentNode;
  
      if (parentDropdown.classList.contains(CLASS_NAME_DROPEND)) {
        return PLACEMENT_RIGHT;
      }
  
      if (parentDropdown.classList.contains(CLASS_NAME_DROPSTART)) {
        return PLACEMENT_LEFT;
      }
  
      // We need to trim the value because custom properties can also include spaces
      const isEnd = getComputedStyle(this._menu).getPropertyValue('--bs-position').trim() === 'end';
  
      if (parentDropdown.classList.contains(CLASS_NAME_DROPUP)) {
        return isEnd ? PLACEMENT_TOPEND : PLACEMENT_TOP;
      }
  
      return isEnd ? PLACEMENT_BOTTOMEND : PLACEMENT_BOTTOM;
    }
  
    _detectNavbar() {
      return this._element.closest(`.${CLASS_NAME_NAVBAR}`) !== null;
    }
  
    _getPopperConfig() {
      const popperConfig = {
        placement: this._getPlacement(),
        modifiers: [
          {
            name: 'preventOverflow',
            options: {
              altBoundary: this._config.flip,
              rootBoundary: this._config.boundary,
            },
          },
        ],
      };
  
      // Disable Popper if we have a static display
      if (this._config.display === 'static') {
        popperConfig.modifiers = [
          {
            name: 'applyStyles',
            enabled: false,
          },
        ];
      }
  
      return {
        ...popperConfig,
        ...this._config.popperConfig,
      };
    }
  
    // Static
  
    static dropdownInterface(element, config) {
      let data = Data.getData(element, DATA_KEY);
      const _config = typeof config === 'object' ? config : null;
  
      if (!data) {
        data = new Dropdown(element, _config);
      }
  
      if (typeof config === 'string') {
        if (typeof data[config] === 'undefined') {
          throw new TypeError(`No method named "${config}"`);
        }
  
        data[config]();
      }
    }
  
    static jQueryInterface(config) {
      return this.each(function () {
        Dropdown.dropdownInterface(this, config);
      });
    }
  
    static clearMenus(event) {
      if (
        event &&
        (event.button === RIGHT_MOUSE_BUTTON || (event.type === 'keyup' && event.key !== TAB_KEY))
      ) {
        return;
      }
  
      const toggles = SelectorEngine.find(SELECTOR_DATA_TOGGLE);
  
      for (let i = 0, len = toggles.length; i < len; i++) {
        const parent = Dropdown.getParentFromElement(toggles[i]);
        const context = Data.getData(toggles[i], DATA_KEY);
        const relatedTarget = {
          relatedTarget: toggles[i],
        };
  
        if (event && event.type === 'click') {
          relatedTarget.clickEvent = event;
        }
  
        if (!context) {
          continue;
        }
  
        const dropdownMenu = context._menu;
        if (!toggles[i].classList.contains(CLASS_NAME_SHOW)) {
          continue;
        }
  
        if (
          event &&
          ((event.type === 'click' && /input|textarea/i.test(event.target.tagName)) ||
            (event.type === 'keyup' && event.key === TAB_KEY)) &&
          dropdownMenu.contains(event.target)
        ) {
          continue;
        }
  
        const hideEvent = EventHandler.trigger(parent, EVENT_HIDE, relatedTarget);
        if (hideEvent.defaultPrevented) {
          continue;
        }
  
        // If this is a touch-enabled device we remove the extra
        // empty mouseover listeners we added for iOS support
        if ('ontouchstart' in document.documentElement) {
          []
            .concat(...document.body.children)
            .forEach((elem) => EventHandler.off(elem, 'mouseover', null, noop()));
        }
  
        toggles[i].setAttribute('aria-expanded', 'false');
  
        if (context._popper) {
          context._popper.destroy();
        }
  
        dropdownMenu.classList.remove(CLASS_NAME_SHOW);
        toggles[i].classList.remove(CLASS_NAME_SHOW);
        EventHandler.trigger(parent, EVENT_HIDDEN, relatedTarget);
      }
    }
  
    static getParentFromElement(element) {
      return getElementFromSelector(element) || element.parentNode;
    }
  
    static dataApiKeydownHandler(event) {
      // If not input/textarea:
      //  - And not a key in REGEXP_KEYDOWN => not a dropdown command
      // If input/textarea:
      //  - If space key => not a dropdown command
      //  - If key is other than escape
      //    - If key is not up or down => not a dropdown command
      //    - If trigger inside the menu => not a dropdown command
      if (
        /input|textarea/i.test(event.target.tagName)
          ? event.key === SPACE_KEY ||
            (event.key !== ESCAPE_KEY &&
              ((event.key !== ARROW_DOWN_KEY && event.key !== ARROW_UP_KEY) ||
                event.target.closest(SELECTOR_MENU)))
          : !REGEXP_KEYDOWN.test(event.key)
      ) {
        return;
      }
  
      event.preventDefault();
      event.stopPropagation();
  
      if (this.disabled || this.classList.contains(CLASS_NAME_DISABLED)) {
        return;
      }
  
      const parent = Dropdown.getParentFromElement(this);
      const isActive = this.classList.contains(CLASS_NAME_SHOW);
  
      if (event.key === ESCAPE_KEY) {
        const button = this.matches(SELECTOR_DATA_TOGGLE)
          ? this
          : SelectorEngine.prev(this, SELECTOR_DATA_TOGGLE)[0];
        button.focus();
        Dropdown.clearMenus();
        return;
      }
  
      if (!isActive || event.key === SPACE_KEY) {
        Dropdown.clearMenus();
        return;
      }
  
      const items = SelectorEngine.find(SELECTOR_VISIBLE_ITEMS, parent).filter(isVisible);
  
      if (!items.length) {
        return;
      }
  
      let index = items.indexOf(event.target);
  
      // Up
      if (event.key === ARROW_UP_KEY && index > 0) {
        index--;
      }
  
      // Down
      if (event.key === ARROW_DOWN_KEY && index < items.length - 1) {
        index++;
      }
  
      // index is -1 if the first keydown is an ArrowUp
      index = index === -1 ? 0 : index;
  
      items[index].focus();
    }
  }
  
  /**
   * ------------------------------------------------------------------------
   * Data Api implementation
   * ------------------------------------------------------------------------
   */
  
  EventHandler.on(
    document,
    EVENT_KEYDOWN_DATA_API,
    SELECTOR_DATA_TOGGLE,
    Dropdown.dataApiKeydownHandler
  );
  EventHandler.on(document, EVENT_KEYDOWN_DATA_API, SELECTOR_MENU, Dropdown.dataApiKeydownHandler);
  EventHandler.on(document, EVENT_CLICK_DATA_API, Dropdown.clearMenus);
  EventHandler.on(document, EVENT_KEYUP_DATA_API, Dropdown.clearMenus);
  EventHandler.on(document, EVENT_CLICK_DATA_API, SELECTOR_DATA_TOGGLE, function (event) {
    event.preventDefault();
    event.stopPropagation();
    Dropdown.dropdownInterface(this, 'toggle');
  });
  EventHandler.on(document, EVENT_CLICK_DATA_API, SELECTOR_FORM_CHILD, (e) => e.stopPropagation());
  
  /**
   * ------------------------------------------------------------------------
   * jQuery
   * ------------------------------------------------------------------------
   * add .Dropdown to jQuery only if jQuery is present
   */
  
  onDOMContentLoaded(() => {
    const $ = getjQuery();
    /* istanbul ignore if */
    if ($) {
      const JQUERY_NO_CONFLICT = $.fn[NAME];
      $.fn[NAME] = Dropdown.jQueryInterface;
      $.fn[NAME].Constructor = Dropdown;
      $.fn[NAME].noConflict = () => {
        $.fn[NAME] = JQUERY_NO_CONFLICT;
        return Dropdown.jQueryInterface;
      };
    }
  });
  
  export default Dropdown;
  