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 {
    defineJQueryPlugin,
    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, 0],
    flip: true,
    boundary: 'clippingParents',
    reference: 'toggle',
    display: 'dynamic',
    popperConfig: null
  }
  
  const DefaultType = {
    offset: '(array|string|function)',
    flip: 'boolean',
    boundary: '(string|element)',
    reference: '(string|element|object)',
    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]
          }
        } else if (typeof this._config.reference === 'object') {
          referenceElement = this._config.reference
        }
  
        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)
  
      if (typeof config.reference === 'object' && !isElement(config.reference) &&
        typeof config.reference.getBoundingClientRect !== 'function'
      ) {
        // Popper virtual elements require a getBoundingClientRect method
        throw new TypeError(`${NAME.toUpperCase()}: Option "reference" provided type "object" without a required "getBoundingClientRect" method.`)
      }
  
      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
    }
  
    _getOffset() {
      const { offset } = this._config
  
      if (typeof offset === 'string') {
        return offset.split(',').map(val => Number.parseInt(val, 10))
      }
  
      if (typeof offset === 'function') {
        return popperData => offset(popperData, this._element)
      }
  
      return offset
    }
  
    _getPopperConfig() {
      const popperConfig = {
        placement: this._getPlacement(),
        modifiers: [{
          name: 'preventOverflow',
          options: {
            altBoundary: this._config.flip,
            rootBoundary: this._config.boundary
          }
        },
        {
          name: 'flip',
          options: {
            fallbackPlacements: ['top', 'right', 'bottom', 'left']
          }
        },
        {
          name: 'offset',
          options: {
            offset: this._getOffset()
          }
        }]
      }
  
      // 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
   */
  
  defineJQueryPlugin(NAME, Dropdown)
  
  export default Dropdown
  