dropdown.js

/*!
  * Bootstrap dropdown.js v4.3.1 (https://getbootstrap.com/)
  * Copyright 2011-2019 The Bootstrap Authors (https://github.com/twbs/bootstrap/graphs/contributors)
  * Licensed under MIT (https://github.com/twbs/bootstrap/blob/master/LICENSE)
  */
(function (global, factory) {
  typeof exports === 'object' && typeof module !== 'undefined' ? module.exports = factory(require('./dom/data.js'), require('./dom/event-handler.js'), require('./dom/manipulator.js'), require('popper.js'), require('./dom/selector-engine.js')) :
  typeof define === 'function' && define.amd ? define(['./dom/data.js', './dom/event-handler.js', './dom/manipulator.js', 'popper.js', './dom/selector-engine.js'], factory) :
  (global = global || self, global.Dropdown = factory(global.Data, global.EventHandler, global.Manipulator, global.Popper, global.SelectorEngine));
}(this, function (Data, EventHandler, Manipulator, Popper, SelectorEngine) { 'use strict';

  Data = Data && Data.hasOwnProperty('default') ? Data['default'] : Data;
  EventHandler = EventHandler && EventHandler.hasOwnProperty('default') ? EventHandler['default'] : EventHandler;
  Manipulator = Manipulator && Manipulator.hasOwnProperty('default') ? Manipulator['default'] : Manipulator;
  Popper = Popper && Popper.hasOwnProperty('default') ? Popper['default'] : Popper;
  SelectorEngine = SelectorEngine && SelectorEngine.hasOwnProperty('default') ? SelectorEngine['default'] : SelectorEngine;

  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;
  }

  function _defineProperty(obj, key, value) {
    if (key in obj) {
      Object.defineProperty(obj, key, {
        value: value,
        enumerable: true,
        configurable: true,
        writable: true
      });
    } else {
      obj[key] = value;
    }

    return obj;
  }

  function ownKeys(object, enumerableOnly) {
    var keys = Object.keys(object);

    if (Object.getOwnPropertySymbols) {
      var symbols = Object.getOwnPropertySymbols(object);
      if (enumerableOnly) symbols = symbols.filter(function (sym) {
        return Object.getOwnPropertyDescriptor(object, sym).enumerable;
      });
      keys.push.apply(keys, symbols);
    }

    return keys;
  }

  function _objectSpread2(target) {
    for (var i = 1; i < arguments.length; i++) {
      var source = arguments[i] != null ? arguments[i] : {};

      if (i % 2) {
        ownKeys(source, true).forEach(function (key) {
          _defineProperty(target, key, source[key]);
        });
      } else if (Object.getOwnPropertyDescriptors) {
        Object.defineProperties(target, Object.getOwnPropertyDescriptors(source));
      } else {
        ownKeys(source).forEach(function (key) {
          Object.defineProperty(target, key, Object.getOwnPropertyDescriptor(source, key));
        });
      }
    }

    return target;
  }

  /**
   * --------------------------------------------------------------------------
   * Bootstrap (v4.3.1): util/index.js
   * Licensed under MIT (https://github.com/twbs/bootstrap/blob/master/LICENSE)
   * --------------------------------------------------------------------------
   */

  var toType = function toType(obj) {
    return {}.toString.call(obj).match(/\s([a-z]+)/i)[1].toLowerCase();
  };

  var getSelector = function getSelector(element) {
    var selector = element.getAttribute('data-target');

    if (!selector || selector === '#') {
      var hrefAttr = element.getAttribute('href');
      selector = hrefAttr && hrefAttr !== '#' ? hrefAttr.trim() : null;
    }

    return selector;
  };

  var getElementFromSelector = function getElementFromSelector(element) {
    var selector = getSelector(element);
    return selector ? document.querySelector(selector) : null;
  };

  var isElement = function isElement(obj) {
    return (obj[0] || obj).nodeType;
  };

  var typeCheckConfig = function typeCheckConfig(componentName, config, configTypes) {
    Object.keys(configTypes).forEach(function (property) {
      var expectedTypes = configTypes[property];
      var value = config[property];
      var valueType = value && isElement(value) ? 'element' : toType(value);

      if (!new RegExp(expectedTypes).test(valueType)) {
        throw new Error(componentName.toUpperCase() + ": " + ("Option \"" + property + "\" provided type \"" + valueType + "\" ") + ("but expected type \"" + expectedTypes + "\"."));
      }
    });
  };

  var makeArray = function makeArray(nodeList) {
    if (!nodeList) {
      return [];
    }

    return [].slice.call(nodeList);
  };

  var noop = function noop() {
    return function () {};
  };

  var getjQuery = function getjQuery() {
    var _window = window,
        jQuery = _window.jQuery;

    if (jQuery && !document.body.hasAttribute('data-no-jquery')) {
      return jQuery;
    }

    return null;
  };

  /**
   * ------------------------------------------------------------------------
   * Constants
   * ------------------------------------------------------------------------
   */

  var NAME = 'dropdown';
  var VERSION = '4.3.1';
  var DATA_KEY = 'bs.dropdown';
  var EVENT_KEY = "." + DATA_KEY;
  var DATA_API_KEY = '.data-api';
  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',
    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):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',
    popperConfig: null
  };
  var DefaultType = {
    offset: '(number|string|function)',
    flip: 'boolean',
    boundary: '(string|element)',
    reference: '(string|element)',
    display: 'string',
    popperConfig: '(null|object)'
  };
  /**
   * ------------------------------------------------------------------------
   * 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();

      Data.setData(element, DATA_KEY, this);
    } // Getters


    var _proto = Dropdown.prototype;

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

      var isActive = this._menu.classList.contains(ClassName.SHOW);

      Dropdown.clearMenus();

      if (isActive) {
        return;
      }

      this.show();
    };

    _proto.show = function show() {
      if (this._element.disabled || this._element.classList.contains(ClassName.DISABLED) || this._menu.classList.contains(ClassName.SHOW)) {
        return;
      }

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

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


      if (!this._inNavbar) {
        if (typeof Popper === 'undefined') {
          throw new TypeError('Bootstrap\'s dropdowns require Popper.js (https://popper.js.org)');
        }

        var 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];
          }
        } // 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.classList.add(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 && !makeArray(SelectorEngine.closest(parent, Selector.NAVBAR_NAV)).length) {
        makeArray(document.body.children).forEach(function (elem) {
          return EventHandler.on(elem, 'mouseover', null, noop());
        });
      }

      this._element.focus();

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

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

    _proto.hide = function hide() {
      if (this._element.disabled || this._element.classList.contains(ClassName.DISABLED) || !this._menu.classList.contains(ClassName.SHOW)) {
        return;
      }

      var parent = Dropdown.getParentFromElement(this._element);
      var relatedTarget = {
        relatedTarget: this._element
      };
      var hideEvent = EventHandler.trigger(parent, Event.HIDE, relatedTarget);

      if (hideEvent.defaultPrevented) {
        return;
      }

      if (this._popper) {
        this._popper.destroy();
      }

      Manipulator.toggleClass(this._menu, ClassName.SHOW);
      Manipulator.toggleClass(parent, ClassName.SHOW);
      EventHandler.trigger(parent, Event.HIDDEN, relatedTarget);
    };

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

      if (this._popper) {
        this._popper.destroy();

        this._popper = null;
      }
    };

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

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

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

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

        _this.toggle();
      });
    };

    _proto._getConfig = function _getConfig(config) {
      config = _objectSpread2({}, this.constructor.Default, {}, Manipulator.getDataAttributes(this._element), {}, config);
      typeCheckConfig(NAME, config, this.constructor.DefaultType);
      return config;
    };

    _proto._getMenuElement = function _getMenuElement() {
      var parent = Dropdown.getParentFromElement(this._element);
      return SelectorEngine.findOne(Selector.MENU, parent);
    };

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

      if (parentDropdown.classList.contains(ClassName.DROPUP)) {
        placement = AttachmentMap.TOP;

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

      return placement;
    };

    _proto._detectNavbar = function _detectNavbar() {
      return Boolean(SelectorEngine.closest(this._element, '.navbar'));
    };

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

      var offset = {};

      if (typeof this._config.offset === 'function') {
        offset.fn = function (data) {
          data.offsets = _objectSpread2({}, data.offsets, {}, _this2._config.offset(data.offsets, _this2._element) || {});
          return data;
        };
      } else {
        offset.offset = this._config.offset;
      }

      return offset;
    };

    _proto._getPopperConfig = function _getPopperConfig() {
      var popperConfig = {
        placement: this._getPlacement(),
        modifiers: {
          offset: this._getOffset(),
          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 _objectSpread2({}, popperConfig, {}, this._config.popperConfig);
    } // Static
    ;

    Dropdown.dropdownInterface = function dropdownInterface(element, config) {
      var data = Data.getData(element, DATA_KEY);

      var _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]();
      }
    };

    Dropdown.jQueryInterface = function jQueryInterface(config) {
      return this.each(function () {
        Dropdown.dropdownInterface(this, 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(SelectorEngine.find(Selector.DATA_TOGGLE));

      for (var i = 0, len = toggles.length; i < len; i++) {
        var parent = Dropdown.getParentFromElement(toggles[i]);
        var context = Data.getData(toggles[i], DATA_KEY);
        var relatedTarget = {
          relatedTarget: toggles[i]
        };

        if (event && event.type === 'click') {
          relatedTarget.clickEvent = event;
        }

        if (!context) {
          continue;
        }

        var dropdownMenu = context._menu;

        if (!parent.classList.contains(ClassName.SHOW)) {
          continue;
        }

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

        var 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) {
          makeArray(document.body.children).forEach(function (elem) {
            return EventHandler.off(elem, 'mouseover', null, noop());
          });
        }

        toggles[i].setAttribute('aria-expanded', 'false');

        if (context._popper) {
          context._popper.destroy();
        }

        dropdownMenu.classList.remove(ClassName.SHOW);
        parent.classList.remove(ClassName.SHOW);
        EventHandler.trigger(parent, Event.HIDDEN, relatedTarget);
      }
    };

    Dropdown.getParentFromElement = function getParentFromElement(element) {
      return getElementFromSelector(element) || element.parentNode;
    };

    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 || SelectorEngine.closest(event.target, Selector.MENU)) : !REGEXP_KEYDOWN.test(event.which)) {
        return;
      }

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

      if (this.disabled || this.classList.contains(ClassName.DISABLED)) {
        return;
      }

      var parent = Dropdown.getParentFromElement(this);
      var isActive = parent.classList.contains(ClassName.SHOW);

      if (!isActive || isActive && (event.which === ESCAPE_KEYCODE || event.which === SPACE_KEYCODE)) {
        if (event.which === ESCAPE_KEYCODE) {
          SelectorEngine.findOne(Selector.DATA_TOGGLE, parent).focus();
        }

        Dropdown.clearMenus();
        return;
      }

      var items = makeArray(SelectorEngine.find(Selector.VISIBLE_ITEMS, parent));

      if (!items.length) {
        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();
    };

    Dropdown.getInstance = function getInstance(element) {
      return Data.getData(element, DATA_KEY);
    };

    _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
   * ------------------------------------------------------------------------
   */


  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, function (e) {
    return e.stopPropagation();
  });
  var $ = getjQuery();
  /**
   * ------------------------------------------------------------------------
   * jQuery
   * ------------------------------------------------------------------------
   * add .dropdown to jQuery only if jQuery is present
   */

  /* istanbul ignore if */

  if ($) {
    var JQUERY_NO_CONFLICT = $.fn[NAME];
    $.fn[NAME] = Dropdown.jQueryInterface;
    $.fn[NAME].Constructor = Dropdown;

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

  return Dropdown;

}));
//# sourceMappingURL=dropdown.js.map