text: import Util from './util'
  
  
  /**
   * --------------------------------------------------------------------------
   * Bootstrap (v4.0.0-alpha.5): tab.js
   * Licensed under MIT (https://github.com/twbs/bootstrap/blob/master/LICENSE)
   * --------------------------------------------------------------------------
   */
  
  const Tab = (($) => {
  
  
    /**
     * ------------------------------------------------------------------------
     * Constants
     * ------------------------------------------------------------------------
     */
  
    const NAME                = 'tab'
    const VERSION             = '4.0.0-alpha.5'
    const DATA_KEY            = 'bs.tab'
    const EVENT_KEY           = `.${DATA_KEY}`
    const DATA_API_KEY        = '.data-api'
    const JQUERY_NO_CONFLICT  = $.fn[NAME]
    const TRANSITION_DURATION = 150
  
    const Event = {
      HIDE           : `hide${EVENT_KEY}`,
      HIDDEN         : `hidden${EVENT_KEY}`,
      SHOW           : `show${EVENT_KEY}`,
      SHOWN          : `shown${EVENT_KEY}`,
      CLICK_DATA_API : `click${EVENT_KEY}${DATA_API_KEY}`
    }
  
    const ClassName = {
      DROPDOWN_MENU : 'dropdown-menu',
      ACTIVE        : 'active',
      FADE          : 'fade',
      IN            : 'in'
    }
  
    const Selector = {
      A                     : 'a',
      LI                    : 'li',
      DROPDOWN              : '.dropdown',
      LIST                  : 'ul:not(.dropdown-menu), ol:not(.dropdown-menu)',
      FADE_CHILD            : '> .nav-item .fade, > .fade',
      ACTIVE                : '.active',
      ACTIVE_CHILD          : '> .nav-item > .active, > .active',
      DATA_TOGGLE           : '[data-toggle="tab"], [data-toggle="pill"]',
      DROPDOWN_TOGGLE       : '.dropdown-toggle',
      DROPDOWN_ACTIVE_CHILD : '> .dropdown-menu .active'
    }
  
  
    /**
     * ------------------------------------------------------------------------
     * Class Definition
     * ------------------------------------------------------------------------
     */
  
    class Tab {
  
      constructor(element) {
        this._element = element
      }
  
  
      // getters
  
      static get VERSION() {
        return VERSION
      }
  
  
      // public
  
      show() {
        if (this._element.parentNode &&
            this._element.parentNode.nodeType === Node.ELEMENT_NODE &&
            $(this._element).hasClass(ClassName.ACTIVE)) {
          return
        }
  
        let target
        let previous
        const listElement = $(this._element).closest(Selector.LIST)[0]
        const selector    = Util.getSelectorFromElement(this._element)
  
        if (listElement) {
          previous = $.makeArray($(listElement).find(Selector.ACTIVE))
          previous = previous[previous.length - 1]
        }
  
        const hideEvent = $.Event(Event.HIDE, {
          relatedTarget: this._element
        })
  
        const showEvent = $.Event(Event.SHOW, {
          relatedTarget: previous
        })
  
        if (previous) {
          $(previous).trigger(hideEvent)
        }
  
        $(this._element).trigger(showEvent)
  
        if (showEvent.isDefaultPrevented() ||
           hideEvent.isDefaultPrevented()) {
          return
        }
  
        if (selector) {
          target = $(selector)[0]
        }
  
        this._activate(
          this._element,
          listElement
        )
  
        const complete = () => {
          const hiddenEvent = $.Event(Event.HIDDEN, {
            relatedTarget: this._element
          })
  
          const shownEvent = $.Event(Event.SHOWN, {
            relatedTarget: previous
          })
  
          $(previous).trigger(hiddenEvent)
          $(this._element).trigger(shownEvent)
        }
  
        if (target) {
          this._activate(target, target.parentNode, complete)
        } else {
          complete()
        }
      }
  
      dispose() {
        $.removeClass(this._element, DATA_KEY)
        this._element = null
      }
  
  
      // private
  
      _activate(element, container, callback) {
        const active          = $(container).find(Selector.ACTIVE_CHILD)[0]
        const isTransitioning = callback
          && Util.supportsTransitionEnd()
          && (active && $(active).hasClass(ClassName.FADE)
             || Boolean($(container).find(Selector.FADE_CHILD)[0]))
  
        const complete = () => this._transitionComplete(
          element,
          active,
          isTransitioning,
          callback
        )
  
        if (active && isTransitioning) {
          $(active)
            .one(Util.TRANSITION_END, complete)
            .emulateTransitionEnd(TRANSITION_DURATION)
  
        } else {
          complete()
        }
  
        if (active) {
          $(active).removeClass(ClassName.IN)
        }
      }
  
      _transitionComplete(element, active, isTransitioning, callback) {
        if (active) {
          $(active).removeClass(ClassName.ACTIVE)
  
          const dropdownChild = $(active.parentNode).find(
            Selector.DROPDOWN_ACTIVE_CHILD
          )[0]
  
          if (dropdownChild) {
            $(dropdownChild).removeClass(ClassName.ACTIVE)
          }
  
          active.setAttribute('aria-expanded', false)
        }
  
        $(element).addClass(ClassName.ACTIVE)
        element.setAttribute('aria-expanded', true)
  
        if (isTransitioning) {
          Util.reflow(element)
          $(element).addClass(ClassName.IN)
        } else {
          $(element).removeClass(ClassName.FADE)
        }
  
        if (element.parentNode &&
            $(element.parentNode).hasClass(ClassName.DROPDOWN_MENU)) {
  
          const dropdownElement = $(element).closest(Selector.DROPDOWN)[0]
          if (dropdownElement) {
            $(dropdownElement).find(Selector.DROPDOWN_TOGGLE).addClass(ClassName.ACTIVE)
          }
  
          element.setAttribute('aria-expanded', true)
        }
  
        if (callback) {
          callback()
        }
      }
  
  
      // static
  
      static _jQueryInterface(config) {
        return this.each(function () {
          const $this = $(this)
          let data    = $this.data(DATA_KEY)
  
          if (!data) {
            data = new Tab(this)
            $this.data(DATA_KEY, data)
          }
  
          if (typeof config === 'string') {
            if (data[config] === undefined) {
              throw new Error(`No method named "${config}"`)
            }
            data[config]()
          }
        })
      }
  
    }
  
  
    /**
     * ------------------------------------------------------------------------
     * Data Api implementation
     * ------------------------------------------------------------------------
     */
  
    $(document)
      .on(Event.CLICK_DATA_API, Selector.DATA_TOGGLE, function (event) {
        event.preventDefault()
        Tab._jQueryInterface.call($(this), 'show')
      })
  
  
    /**
     * ------------------------------------------------------------------------
     * jQuery
     * ------------------------------------------------------------------------
     */
  
    $.fn[NAME]             = Tab._jQueryInterface
    $.fn[NAME].Constructor = Tab
    $.fn[NAME].noConflict  = function () {
      $.fn[NAME] = JQUERY_NO_CONFLICT
      return Tab._jQueryInterface
    }
  
    return Tab
  
  })(jQuery)
  
  export default Tab
  