Webprogrammierung/node_modules/bootstrap/js/dist/dropdown.js

/*!
  * Bootstrap dropdown.js v5.1.3 (https://getbootstrap.com/)
  * Copyright 2011-2021 The Bootstrap Authors (https://github.com/twbs/bootstrap/graphs/contributors)
  * Licensed under MIT (https://github.com/twbs/bootstrap/blob/main/LICENSE)
  */
(function (global, factory) {
  typeof exports === 'object' && typeof module !== 'undefined' ? module.exports = factory(require('@popperjs/core'), require('./dom/event-handler.js'), require('./dom/manipulator.js'), require('./dom/selector-engine.js'), require('./base-component.js')) :
  typeof define === 'function' && define.amd ? define(['@popperjs/core', './dom/event-handler', './dom/manipulator', './dom/selector-engine', './base-component'], factory) :
  (global = typeof globalThis !== 'undefined' ? globalThis : global || self, global.Dropdown = factory(global.Popper, global.EventHandler, global.Manipulator, global.SelectorEngine, global.Base));
})(this, (function (Popper, EventHandler, Manipulator, SelectorEngine, BaseComponent) { 'use strict';

  const _interopDefaultLegacy = e => e && typeof e === 'object' && 'default' in e ? e : { default: e };

  function _interopNamespace(e) {
    if (e && e.__esModule) return e;
    const n = Object.create(null);
    if (e) {
      for (const k in e) {
        if (k !== 'default') {
          const d = Object.getOwnPropertyDescriptor(e, k);
          Object.defineProperty(n, k, d.get ? d : {
            enumerable: true,
            get: () => e[k]
          });
        }
      }
    }
    n.default = e;
    return Object.freeze(n);
  }

  const Popper__namespace = /*#__PURE__*/_interopNamespace(Popper);
  const EventHandler__default = /*#__PURE__*/_interopDefaultLegacy(EventHandler);
  const Manipulator__default = /*#__PURE__*/_interopDefaultLegacy(Manipulator);
  const SelectorEngine__default = /*#__PURE__*/_interopDefaultLegacy(SelectorEngine);
  const BaseComponent__default = /*#__PURE__*/_interopDefaultLegacy(BaseComponent);

  /**
   * --------------------------------------------------------------------------
   * Bootstrap (v5.1.3): util/index.js
   * Licensed under MIT (https://github.com/twbs/bootstrap/blob/main/LICENSE)
   * --------------------------------------------------------------------------
   */

  const toType = obj => {
    if (obj === null || obj === undefined) {
      return `${obj}`;
    }

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

  const getSelector = element => {
    let selector = element.getAttribute('data-bs-target');

    if (!selector || selector === '#') {
      let hrefAttr = element.getAttribute('href'); // The only valid content that could double as a selector are IDs or classes,
      // so everything starting with `#` or `.`. If a "real" URL is used as the selector,
      // `document.querySelector` will rightfully complain it is invalid.
      // See https://github.com/twbs/bootstrap/issues/32273

      if (!hrefAttr || !hrefAttr.includes('#') && !hrefAttr.startsWith('.')) {
        return null;
      } // Just in case some CMS puts out a full URL with the anchor appended


      if (hrefAttr.includes('#') && !hrefAttr.startsWith('#')) {
        hrefAttr = `#${hrefAttr.split('#')[1]}`;
      }

      selector = hrefAttr && hrefAttr !== '#' ? hrefAttr.trim() : null;
    }

    return selector;
  };

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

  const isElement = obj => {
    if (!obj || typeof obj !== 'object') {
      return false;
    }

    if (typeof obj.jquery !== 'undefined') {
      obj = obj[0];
    }

    return typeof obj.nodeType !== 'undefined';
  };

  const getElement = obj => {
    if (isElement(obj)) {
      // it's a jQuery object or a node element
      return obj.jquery ? obj[0] : obj;
    }

    if (typeof obj === 'string' && obj.length > 0) {
      return document.querySelector(obj);
    }

    return null;
  };

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

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

  const isVisible = element => {
    if (!isElement(element) || element.getClientRects().length === 0) {
      return false;
    }

    return getComputedStyle(element).getPropertyValue('visibility') === 'visible';
  };

  const isDisabled = element => {
    if (!element || element.nodeType !== Node.ELEMENT_NODE) {
      return true;
    }

    if (element.classList.contains('disabled')) {
      return true;
    }

    if (typeof element.disabled !== 'undefined') {
      return element.disabled;
    }

    return element.hasAttribute('disabled') && element.getAttribute('disabled') !== 'false';
  };

  const noop = () => {};

  const getjQuery = () => {
    const {
      jQuery
    } = window;

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

    return null;
  };

  const DOMContentLoadedCallbacks = [];

  const onDOMContentLoaded = callback => {
    if (document.readyState === 'loading') {
      // add listener on the first call when the document is in loading state
      if (!DOMContentLoadedCallbacks.length) {
        document.addEventListener('DOMContentLoaded', () => {
          DOMContentLoadedCallbacks.forEach(callback => callback());
        });
      }

      DOMContentLoadedCallbacks.push(callback);
    } else {
      callback();
    }
  };

  const isRTL = () => document.documentElement.dir === 'rtl';

  const defineJQueryPlugin = plugin => {
    onDOMContentLoaded(() => {
      const $ = getjQuery();
      /* istanbul ignore if */

      if ($) {
        const name = plugin.NAME;
        const JQUERY_NO_CONFLICT = $.fn[name];
        $.fn[name] = plugin.jQueryInterface;
        $.fn[name].Constructor = plugin;

        $.fn[name].noConflict = () => {
          $.fn[name] = JQUERY_NO_CONFLICT;
          return plugin.jQueryInterface;
        };
      }
    });
  };
  /**
   * Return the previous/next element of a list.
   *
   * @param {array} list    The list of elements
   * @param activeElement   The active element
   * @param shouldGetNext   Choose to get next or previous element
   * @param isCycleAllowed
   * @return {Element|elem} The proper element
   */


  const getNextActiveElement = (list, activeElement, shouldGetNext, isCycleAllowed) => {
    let index = list.indexOf(activeElement); // if the element does not exist in the list return an element depending on the direction and if cycle is allowed

    if (index === -1) {
      return list[!shouldGetNext && isCycleAllowed ? list.length - 1 : 0];
    }

    const listLength = list.length;
    index += shouldGetNext ? 1 : -1;

    if (isCycleAllowed) {
      index = (index + listLength) % listLength;
    }

    return list[Math.max(0, Math.min(index, listLength - 1))];
  };

  /**
   * --------------------------------------------------------------------------
   * Bootstrap (v5.1.3): dropdown.js
   * Licensed under MIT (https://github.com/twbs/bootstrap/blob/main/LICENSE)
   * --------------------------------------------------------------------------
   */
  /**
   * ------------------------------------------------------------------------
   * 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${EVENT_KEY}`;
  const EVENT_CLICK_DATA_API = `click${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_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_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, 2],
    boundary: 'clippingParents',
    reference: 'toggle',
    display: 'dynamic',
    popperConfig: null,
    autoClose: true
  };
  const DefaultType = {
    offset: '(array|string|function)',
    boundary: '(string|element)',
    reference: '(string|element|object)',
    display: 'string',
    popperConfig: '(null|object|function)',
    autoClose: '(boolean|string)'
  };
  /**
   * ------------------------------------------------------------------------
   * Class Definition
   * ------------------------------------------------------------------------
   */

  class Dropdown extends BaseComponent__default.default {
    constructor(element, config) {
      super(element);
      this._popper = null;
      this._config = this._getConfig(config);
      this._menu = this._getMenuElement();
      this._inNavbar = this._detectNavbar();
    } // Getters


    static get Default() {
      return Default;
    }

    static get DefaultType() {
      return DefaultType;
    }

    static get NAME() {
      return NAME;
    } // Public


    toggle() {
      return this._isShown() ? this.hide() : this.show();
    }

    show() {
      if (isDisabled(this._element) || this._isShown(this._menu)) {
        return;
      }

      const relatedTarget = {
        relatedTarget: this._element
      };
      const showEvent = EventHandler__default.default.trigger(this._element, EVENT_SHOW, relatedTarget);

      if (showEvent.defaultPrevented) {
        return;
      }

      const parent = Dropdown.getParentFromElement(this._element); // Totally disable Popper for Dropdowns in Navbar

      if (this._inNavbar) {
        Manipulator__default.default.setDataAttribute(this._menu, 'popper', 'none');
      } else {
        this._createPopper(parent);
      } // 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__default.default.on(elem, 'mouseover', noop));
      }

      this._element.focus();

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

      this._menu.classList.add(CLASS_NAME_SHOW);

      this._element.classList.add(CLASS_NAME_SHOW);

      EventHandler__default.default.trigger(this._element, EVENT_SHOWN, relatedTarget);
    }

    hide() {
      if (isDisabled(this._element) || !this._isShown(this._menu)) {
        return;
      }

      const relatedTarget = {
        relatedTarget: this._element
      };

      this._completeHide(relatedTarget);
    }

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

      super.dispose();
    }

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

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


    _completeHide(relatedTarget) {
      const hideEvent = EventHandler__default.default.trigger(this._element, EVENT_HIDE, relatedTarget);

      if (hideEvent.defaultPrevented) {
        return;
      } // 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__default.default.off(elem, 'mouseover', noop));
      }

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

      this._menu.classList.remove(CLASS_NAME_SHOW);

      this._element.classList.remove(CLASS_NAME_SHOW);

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

      Manipulator__default.default.removeDataAttribute(this._menu, 'popper');
      EventHandler__default.default.trigger(this._element, EVENT_HIDDEN, relatedTarget);
    }

    _getConfig(config) {
      config = { ...this.constructor.Default,
        ...Manipulator__default.default.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;
    }

    _createPopper(parent) {
      if (typeof Popper__namespace === '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 = getElement(this._config.reference);
      } else if (typeof this._config.reference === 'object') {
        referenceElement = this._config.reference;
      }

      const popperConfig = this._getPopperConfig();

      const isDisplayStatic = popperConfig.modifiers.find(modifier => modifier.name === 'applyStyles' && modifier.enabled === false);
      this._popper = Popper__namespace.createPopper(referenceElement, this._menu, popperConfig);

      if (isDisplayStatic) {
        Manipulator__default.default.setDataAttribute(this._menu, 'popper', 'static');
      }
    }

    _isShown(element = this._element) {
      return element.classList.contains(CLASS_NAME_SHOW);
    }

    _getMenuElement() {
      return SelectorEngine__default.default.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 defaultBsPopperConfig = {
        placement: this._getPlacement(),
        modifiers: [{
          name: 'preventOverflow',
          options: {
            boundary: this._config.boundary
          }
        }, {
          name: 'offset',
          options: {
            offset: this._getOffset()
          }
        }]
      }; // Disable Popper if we have a static display

      if (this._config.display === 'static') {
        defaultBsPopperConfig.modifiers = [{
          name: 'applyStyles',
          enabled: false
        }];
      }

      return { ...defaultBsPopperConfig,
        ...(typeof this._config.popperConfig === 'function' ? this._config.popperConfig(defaultBsPopperConfig) : this._config.popperConfig)
      };
    }

    _selectMenuItem({
      key,
      target
    }) {
      const items = SelectorEngine__default.default.find(SELECTOR_VISIBLE_ITEMS, this._menu).filter(isVisible);

      if (!items.length) {
        return;
      } // if target isn't included in items (e.g. when expanding the dropdown)
      // allow cycling to get the last item in case key equals ARROW_UP_KEY


      getNextActiveElement(items, target, key === ARROW_DOWN_KEY, !items.includes(target)).focus();
    } // Static


    static jQueryInterface(config) {
      return this.each(function () {
        const data = Dropdown.getOrCreateInstance(this, config);

        if (typeof config !== 'string') {
          return;
        }

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

        data[config]();
      });
    }

    static clearMenus(event) {
      if (event && (event.button === RIGHT_MOUSE_BUTTON || event.type === 'keyup' && event.key !== TAB_KEY)) {
        return;
      }

      const toggles = SelectorEngine__default.default.find(SELECTOR_DATA_TOGGLE);

      for (let i = 0, len = toggles.length; i < len; i++) {
        const context = Dropdown.getInstance(toggles[i]);

        if (!context || context._config.autoClose === false) {
          continue;
        }

        if (!context._isShown()) {
          continue;
        }

        const relatedTarget = {
          relatedTarget: context._element
        };

        if (event) {
          const composedPath = event.composedPath();
          const isMenuTarget = composedPath.includes(context._menu);

          if (composedPath.includes(context._element) || context._config.autoClose === 'inside' && !isMenuTarget || context._config.autoClose === 'outside' && isMenuTarget) {
            continue;
          } // Tab navigation through the dropdown menu or events from contained inputs shouldn't close the menu


          if (context._menu.contains(event.target) && (event.type === 'keyup' && event.key === TAB_KEY || /input|select|option|textarea|form/i.test(event.target.tagName))) {
            continue;
          }

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

        context._completeHide(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;
      }

      const isActive = this.classList.contains(CLASS_NAME_SHOW);

      if (!isActive && event.key === ESCAPE_KEY) {
        return;
      }

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

      if (isDisabled(this)) {
        return;
      }

      const getToggleButton = this.matches(SELECTOR_DATA_TOGGLE) ? this : SelectorEngine__default.default.prev(this, SELECTOR_DATA_TOGGLE)[0];
      const instance = Dropdown.getOrCreateInstance(getToggleButton);

      if (event.key === ESCAPE_KEY) {
        instance.hide();
        return;
      }

      if (event.key === ARROW_UP_KEY || event.key === ARROW_DOWN_KEY) {
        if (!isActive) {
          instance.show();
        }

        instance._selectMenuItem(event);

        return;
      }

      if (!isActive || event.key === SPACE_KEY) {
        Dropdown.clearMenus();
      }
    }

  }
  /**
   * ------------------------------------------------------------------------
   * Data Api implementation
   * ------------------------------------------------------------------------
   */


  EventHandler__default.default.on(document, EVENT_KEYDOWN_DATA_API, SELECTOR_DATA_TOGGLE, Dropdown.dataApiKeydownHandler);
  EventHandler__default.default.on(document, EVENT_KEYDOWN_DATA_API, SELECTOR_MENU, Dropdown.dataApiKeydownHandler);
  EventHandler__default.default.on(document, EVENT_CLICK_DATA_API, Dropdown.clearMenus);
  EventHandler__default.default.on(document, EVENT_KEYUP_DATA_API, Dropdown.clearMenus);
  EventHandler__default.default.on(document, EVENT_CLICK_DATA_API, SELECTOR_DATA_TOGGLE, function (event) {
    event.preventDefault();
    Dropdown.getOrCreateInstance(this).toggle();
  });
  /**
   * ------------------------------------------------------------------------
   * jQuery
   * ------------------------------------------------------------------------
   * add .Dropdown to jQuery only if jQuery is present
   */

  defineJQueryPlugin(Dropdown);

  return Dropdown;

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