dropdown.js

function _extends() { _extends = Object.assign || function (target) { for (var i = 1; i < arguments.length; i++) { var source = arguments[i]; for (var key in source) { if (Object.prototype.hasOwnProperty.call(source, key)) { target[key] = source[key]; } } } return target; }; return _extends.apply(this, arguments); }

function _defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } }

function _createClass(Constructor, protoProps, staticProps) { if (protoProps) _defineProperties(Constructor.prototype, protoProps); if (staticProps) _defineProperties(Constructor, staticProps); return Constructor; }

/**
 * --------------------------------------------------------------------------
 * Bootstrap (v4.0.0): dropdown.js
 * Licensed under MIT (https://github.com/twbs/bootstrap/blob/master/LICENSE)
 * --------------------------------------------------------------------------
 */
var Dropdown = function ($) {
  /**
   * ------------------------------------------------------------------------
   * Constants
   * ------------------------------------------------------------------------
   */
  var NAME = 'dropdown';
  var VERSION = '4.0.0';
  var DATA_KEY = 'bs.dropdown';
  var EVENT_KEY = "." + DATA_KEY;
  var DATA_API_KEY = '.data-api';
  var JQUERY_NO_CONFLICT = $.fn[NAME];
  var ESCAPE_KEYCODE = 27; // KeyboardEvent.which value for Escape (Esc) key

  var SPACE_KEYCODE = 32; // KeyboardEvent.which value for space key

  var TAB_KEYCODE = 9; // KeyboardEvent.which value for tab key

  var ARROW_UP_KEYCODE = 38; // KeyboardEvent.which value for up arrow key

  var ARROW_DOWN_KEYCODE = 40; // KeyboardEvent.which value for down arrow key

  var RIGHT_MOUSE_BUTTON_WHICH = 3; // MouseEvent.which value for the right button (assuming a right-handed mouse)

  var REGEXP_KEYDOWN = new RegExp(ARROW_UP_KEYCODE + "|" + ARROW_DOWN_KEYCODE + "|" + ESCAPE_KEYCODE);
  var Event = {
    HIDE: "hide" + EVENT_KEY,
    HIDDEN: "hidden" + EVENT_KEY,
    SHOW: "show" + EVENT_KEY,
    SHOWN: "shown" + EVENT_KEY,
    CLICK: "click" + EVENT_KEY,
    CLICK_DATA_API: "click" + EVENT_KEY + DATA_API_KEY,
    KEYDOWN_DATA_API: "keydown" + EVENT_KEY + DATA_API_KEY,
    KEYUP_DATA_API: "keyup" + EVENT_KEY + DATA_API_KEY
  };
  var ClassName = {
    DISABLED: 'disabled',
    SHOW: 'show',
    DROPUP: 'dropup',
    DROPRIGHT: 'dropright',
    DROPLEFT: 'dropleft',
    MENURIGHT: 'dropdown-menu-right',
    MENULEFT: 'dropdown-menu-left',
    POSITION_STATIC: 'position-static'
  };
  var Selector = {
    DATA_TOGGLE: '[data-toggle="dropdown"]',
    FORM_CHILD: '.dropdown form',
    MENU: '.dropdown-menu',
    NAVBAR_NAV: '.navbar-nav',
    VISIBLE_ITEMS: '.dropdown-menu .dropdown-item:not(.disabled)'
  };
  var AttachmentMap = {
    TOP: 'top-start',
    TOPEND: 'top-end',
    BOTTOM: 'bottom-start',
    BOTTOMEND: 'bottom-end',
    RIGHT: 'right-start',
    RIGHTEND: 'right-end',
    LEFT: 'left-start',
    LEFTEND: 'left-end'
  };
  var Default = {
    offset: 0,
    flip: true,
    boundary: 'scrollParent',
    reference: 'toggle',
    display: 'dynamic'
  };
  var DefaultType = {
    offset: '(number|string|function)',
    flip: 'boolean',
    boundary: '(string|element)',
    reference: '(string|element)',
    display: 'string'
    /**
     * ------------------------------------------------------------------------
     * Class Definition
     * ------------------------------------------------------------------------
     */

  };

  var Dropdown =
  /*#__PURE__*/
  function () {
    function Dropdown(element, config) {
      this._element = element;
      this._popper = null;
      this._config = this._getConfig(config);
      this._menu = this._getMenuElement();
      this._inNavbar = this._detectNavbar();

      this._addEventListeners();
    } // Getters


    var _proto = Dropdown.prototype;

    // Public
    _proto.toggle = function toggle() {
      if (this._element.disabled || $(this._element).hasClass(ClassName.DISABLED)) {
        return;
      }

      var parent = Dropdown._getParentFromElement(this._element);

      var isActive = $(this._menu).hasClass(ClassName.SHOW);

      Dropdown._clearMenus();

      if (isActive) {
        return;
      }

      var relatedTarget = {
        relatedTarget: this._element
      };
      var showEvent = $.Event(Event.SHOW, relatedTarget);
      $(parent).trigger(showEvent);

      if (showEvent.isDefaultPrevented()) {
        return;
      } // Disable totally Popper.js for Dropdown in Navbar


      if (!this._inNavbar) {
        /**
         * Check for Popper dependency
         * Popper - https://popper.js.org
         */
        if (typeof Popper === 'undefined') {
          throw new TypeError('Bootstrap dropdown require Popper.js (https://popper.js.org)');
        }

        var referenceElement = this._element;

        if (this._config.reference === 'parent') {
          referenceElement = parent;
        } else if (Util.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];
          }
        } // If boundary is not `scrollParent`, then set position to `static`
        // to allow the menu to "escape" the scroll parent's boundaries
        // https://github.com/twbs/bootstrap/issues/24251


        if (this._config.boundary !== 'scrollParent') {
          $(parent).addClass(ClassName.POSITION_STATIC);
        }

        this._popper = new Popper(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).length === 0) {
        $('body').children().on('mouseover', null, $.noop);
      }

      this._element.focus();

      this._element.setAttribute('aria-expanded', true);

      $(this._menu).toggleClass(ClassName.SHOW);
      $(parent).toggleClass(ClassName.SHOW).trigger($.Event(Event.SHOWN, relatedTarget));
    };

    _proto.dispose = function dispose() {
      $.removeData(this._element, DATA_KEY);
      $(this._element).off(EVENT_KEY);
      this._element = null;
      this._menu = null;

      if (this._popper !== null) {
        this._popper.destroy();

        this._popper = null;
      }
    };

    _proto.update = function update() {
      this._inNavbar = this._detectNavbar();

      if (this._popper !== null) {
        this._popper.scheduleUpdate();
      }
    }; // Private


    _proto._addEventListeners = function _addEventListeners() {
      var _this = this;

      $(this._element).on(Event.CLICK, function (event) {
        event.preventDefault();
        event.stopPropagation();

        _this.toggle();
      });
    };

    _proto._getConfig = function _getConfig(config) {
      config = _extends({}, this.constructor.Default, $(this._element).data(), config);
      Util.typeCheckConfig(NAME, config, this.constructor.DefaultType);
      return config;
    };

    _proto._getMenuElement = function _getMenuElement() {
      if (!this._menu) {
        var parent = Dropdown._getParentFromElement(this._element);

        this._menu = $(parent).find(Selector.MENU)[0];
      }

      return this._menu;
    };

    _proto._getPlacement = function _getPlacement() {
      var $parentDropdown = $(this._element).parent();
      var placement = AttachmentMap.BOTTOM; // Handle dropup

      if ($parentDropdown.hasClass(ClassName.DROPUP)) {
        placement = AttachmentMap.TOP;

        if ($(this._menu).hasClass(ClassName.MENURIGHT)) {
          placement = AttachmentMap.TOPEND;
        }
      } else if ($parentDropdown.hasClass(ClassName.DROPRIGHT)) {
        placement = AttachmentMap.RIGHT;
      } else if ($parentDropdown.hasClass(ClassName.DROPLEFT)) {
        placement = AttachmentMap.LEFT;
      } else if ($(this._menu).hasClass(ClassName.MENURIGHT)) {
        placement = AttachmentMap.BOTTOMEND;
      }

      return placement;
    };

    _proto._detectNavbar = function _detectNavbar() {
      return $(this._element).closest('.navbar').length > 0;
    };

    _proto._getPopperConfig = function _getPopperConfig() {
      var _this2 = this;

      var offsetConf = {};

      if (typeof this._config.offset === 'function') {
        offsetConf.fn = function (data) {
          data.offsets = _extends({}, data.offsets, _this2._config.offset(data.offsets) || {});
          return data;
        };
      } else {
        offsetConf.offset = this._config.offset;
      }

      var popperConfig = {
        placement: this._getPlacement(),
        modifiers: {
          offset: offsetConf,
          flip: {
            enabled: this._config.flip
          },
          preventOverflow: {
            boundariesElement: this._config.boundary
          }
        } // Disable Popper.js if we have a static display

      };

      if (this._config.display === 'static') {
        popperConfig.modifiers.applyStyle = {
          enabled: false
        };
      }

      return popperConfig;
    }; // Static


    Dropdown._jQueryInterface = function _jQueryInterface(config) {
      return this.each(function () {
        var data = $(this).data(DATA_KEY);

        var _config = typeof config === 'object' ? config : null;

        if (!data) {
          data = new Dropdown(this, _config);
          $(this).data(DATA_KEY, data);
        }

        if (typeof config === 'string') {
          if (typeof data[config] === 'undefined') {
            throw new TypeError("No method named \"" + config + "\"");
          }

          data[config]();
        }
      });
    };

    Dropdown._clearMenus = function _clearMenus(event) {
      if (event && (event.which === RIGHT_MOUSE_BUTTON_WHICH || event.type === 'keyup' && event.which !== TAB_KEYCODE)) {
        return;
      }

      var toggles = $.makeArray($(Selector.DATA_TOGGLE));

      for (var i = 0; i < toggles.length; i++) {
        var parent = Dropdown._getParentFromElement(toggles[i]);

        var context = $(toggles[i]).data(DATA_KEY);
        var relatedTarget = {
          relatedTarget: toggles[i]
        };

        if (!context) {
          continue;
        }

        var dropdownMenu = context._menu;

        if (!$(parent).hasClass(ClassName.SHOW)) {
          continue;
        }

        if (event && (event.type === 'click' && /input|textarea/i.test(event.target.tagName) || event.type === 'keyup' && event.which === TAB_KEYCODE) && $.contains(parent, event.target)) {
          continue;
        }

        var hideEvent = $.Event(Event.HIDE, relatedTarget);
        $(parent).trigger(hideEvent);

        if (hideEvent.isDefaultPrevented()) {
          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) {
          $('body').children().off('mouseover', null, $.noop);
        }

        toggles[i].setAttribute('aria-expanded', 'false');
        $(dropdownMenu).removeClass(ClassName.SHOW);
        $(parent).removeClass(ClassName.SHOW).trigger($.Event(Event.HIDDEN, relatedTarget));
      }
    };

    Dropdown._getParentFromElement = function _getParentFromElement(element) {
      var parent;
      var selector = Util.getSelectorFromElement(element);

      if (selector) {
        parent = $(selector)[0];
      }

      return parent || element.parentNode;
    }; // eslint-disable-next-line complexity


    Dropdown._dataApiKeydownHandler = function _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.which === SPACE_KEYCODE || event.which !== ESCAPE_KEYCODE && (event.which !== ARROW_DOWN_KEYCODE && event.which !== ARROW_UP_KEYCODE || $(event.target).closest(Selector.MENU).length) : !REGEXP_KEYDOWN.test(event.which)) {
        return;
      }

      event.preventDefault();
      event.stopPropagation();

      if (this.disabled || $(this).hasClass(ClassName.DISABLED)) {
        return;
      }

      var parent = Dropdown._getParentFromElement(this);

      var isActive = $(parent).hasClass(ClassName.SHOW);

      if (!isActive && (event.which !== ESCAPE_KEYCODE || event.which !== SPACE_KEYCODE) || isActive && (event.which === ESCAPE_KEYCODE || event.which === SPACE_KEYCODE)) {
        if (event.which === ESCAPE_KEYCODE) {
          var toggle = $(parent).find(Selector.DATA_TOGGLE)[0];
          $(toggle).trigger('focus');
        }

        $(this).trigger('click');
        return;
      }

      var items = $(parent).find(Selector.VISIBLE_ITEMS).get();

      if (items.length === 0) {
        return;
      }

      var index = items.indexOf(event.target);

      if (event.which === ARROW_UP_KEYCODE && index > 0) {
        // Up
        index--;
      }

      if (event.which === ARROW_DOWN_KEYCODE && index < items.length - 1) {
        // Down
        index++;
      }

      if (index < 0) {
        index = 0;
      }

      items[index].focus();
    };

    _createClass(Dropdown, null, [{
      key: "VERSION",
      get: function get() {
        return VERSION;
      }
    }, {
      key: "Default",
      get: function get() {
        return Default;
      }
    }, {
      key: "DefaultType",
      get: function get() {
        return DefaultType;
      }
    }]);

    return Dropdown;
  }();
  /**
   * ------------------------------------------------------------------------
   * Data Api implementation
   * ------------------------------------------------------------------------
   */


  $(document).on(Event.KEYDOWN_DATA_API, Selector.DATA_TOGGLE, Dropdown._dataApiKeydownHandler).on(Event.KEYDOWN_DATA_API, Selector.MENU, Dropdown._dataApiKeydownHandler).on(Event.CLICK_DATA_API + " " + Event.KEYUP_DATA_API, Dropdown._clearMenus).on(Event.CLICK_DATA_API, Selector.DATA_TOGGLE, function (event) {
    event.preventDefault();
    event.stopPropagation();

    Dropdown._jQueryInterface.call($(this), 'toggle');
  }).on(Event.CLICK_DATA_API, Selector.FORM_CHILD, function (e) {
    e.stopPropagation();
  });
  /**
   * ------------------------------------------------------------------------
   * jQuery
   * ------------------------------------------------------------------------
   */

  $.fn[NAME] = Dropdown._jQueryInterface;
  $.fn[NAME].Constructor = Dropdown;

  $.fn[NAME].noConflict = function () {
    $.fn[NAME] = JQUERY_NO_CONFLICT;
    return Dropdown._jQueryInterface;
  };

  return Dropdown;
}($, Popper);
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