Webprogrammierung/node_modules/bootstrap/js/dist/carousel.js

/*!
  * Bootstrap carousel.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('./dom/event-handler.js'), require('./dom/manipulator.js'), require('./dom/selector-engine.js'), require('./base-component.js')) :
  typeof define === 'function' && define.amd ? define(['./dom/event-handler', './dom/manipulator', './dom/selector-engine', './base-component'], factory) :
  (global = typeof globalThis !== 'undefined' ? globalThis : global || self, global.Carousel = factory(global.EventHandler, global.Manipulator, global.SelectorEngine, global.Base));
})(this, (function (EventHandler, Manipulator, SelectorEngine, BaseComponent) { 'use strict';

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

  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 TRANSITION_END = 'transitionend'; // Shoutout AngusCroll (https://goo.gl/pxwQGp)

  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 triggerTransitionEnd = element => {
    element.dispatchEvent(new Event(TRANSITION_END));
  };

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

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

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

  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';
  };
  /**
   * Trick to restart an element's animation
   *
   * @param {HTMLElement} element
   * @return void
   *
   * @see https://www.charistheo.io/blog/2021/02/restart-a-css-animation-with-javascript/#restarting-a-css-animation
   */


  const reflow = element => {
    // eslint-disable-next-line no-unused-expressions
    element.offsetHeight;
  };

  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): carousel.js
   * Licensed under MIT (https://github.com/twbs/bootstrap/blob/main/LICENSE)
   * --------------------------------------------------------------------------
   */
  /**
   * ------------------------------------------------------------------------
   * Constants
   * ------------------------------------------------------------------------
   */

  const NAME = 'carousel';
  const DATA_KEY = 'bs.carousel';
  const EVENT_KEY = `.${DATA_KEY}`;
  const DATA_API_KEY = '.data-api';
  const ARROW_LEFT_KEY = 'ArrowLeft';
  const ARROW_RIGHT_KEY = 'ArrowRight';
  const TOUCHEVENT_COMPAT_WAIT = 500; // Time for mouse compat events to fire after touch

  const SWIPE_THRESHOLD = 40;
  const Default = {
    interval: 5000,
    keyboard: true,
    slide: false,
    pause: 'hover',
    wrap: true,
    touch: true
  };
  const DefaultType = {
    interval: '(number|boolean)',
    keyboard: 'boolean',
    slide: '(boolean|string)',
    pause: '(string|boolean)',
    wrap: 'boolean',
    touch: 'boolean'
  };
  const ORDER_NEXT = 'next';
  const ORDER_PREV = 'prev';
  const DIRECTION_LEFT = 'left';
  const DIRECTION_RIGHT = 'right';
  const KEY_TO_DIRECTION = {
    [ARROW_LEFT_KEY]: DIRECTION_RIGHT,
    [ARROW_RIGHT_KEY]: DIRECTION_LEFT
  };
  const EVENT_SLIDE = `slide${EVENT_KEY}`;
  const EVENT_SLID = `slid${EVENT_KEY}`;
  const EVENT_KEYDOWN = `keydown${EVENT_KEY}`;
  const EVENT_MOUSEENTER = `mouseenter${EVENT_KEY}`;
  const EVENT_MOUSELEAVE = `mouseleave${EVENT_KEY}`;
  const EVENT_TOUCHSTART = `touchstart${EVENT_KEY}`;
  const EVENT_TOUCHMOVE = `touchmove${EVENT_KEY}`;
  const EVENT_TOUCHEND = `touchend${EVENT_KEY}`;
  const EVENT_POINTERDOWN = `pointerdown${EVENT_KEY}`;
  const EVENT_POINTERUP = `pointerup${EVENT_KEY}`;
  const EVENT_DRAG_START = `dragstart${EVENT_KEY}`;
  const EVENT_LOAD_DATA_API = `load${EVENT_KEY}${DATA_API_KEY}`;
  const EVENT_CLICK_DATA_API = `click${EVENT_KEY}${DATA_API_KEY}`;
  const CLASS_NAME_CAROUSEL = 'carousel';
  const CLASS_NAME_ACTIVE = 'active';
  const CLASS_NAME_SLIDE = 'slide';
  const CLASS_NAME_END = 'carousel-item-end';
  const CLASS_NAME_START = 'carousel-item-start';
  const CLASS_NAME_NEXT = 'carousel-item-next';
  const CLASS_NAME_PREV = 'carousel-item-prev';
  const CLASS_NAME_POINTER_EVENT = 'pointer-event';
  const SELECTOR_ACTIVE = '.active';
  const SELECTOR_ACTIVE_ITEM = '.active.carousel-item';
  const SELECTOR_ITEM = '.carousel-item';
  const SELECTOR_ITEM_IMG = '.carousel-item img';
  const SELECTOR_NEXT_PREV = '.carousel-item-next, .carousel-item-prev';
  const SELECTOR_INDICATORS = '.carousel-indicators';
  const SELECTOR_INDICATOR = '[data-bs-target]';
  const SELECTOR_DATA_SLIDE = '[data-bs-slide], [data-bs-slide-to]';
  const SELECTOR_DATA_RIDE = '[data-bs-ride="carousel"]';
  const POINTER_TYPE_TOUCH = 'touch';
  const POINTER_TYPE_PEN = 'pen';
  /**
   * ------------------------------------------------------------------------
   * Class Definition
   * ------------------------------------------------------------------------
   */

  class Carousel extends BaseComponent__default.default {
    constructor(element, config) {
      super(element);
      this._items = null;
      this._interval = null;
      this._activeElement = null;
      this._isPaused = false;
      this._isSliding = false;
      this.touchTimeout = null;
      this.touchStartX = 0;
      this.touchDeltaX = 0;
      this._config = this._getConfig(config);
      this._indicatorsElement = SelectorEngine__default.default.findOne(SELECTOR_INDICATORS, this._element);
      this._touchSupported = 'ontouchstart' in document.documentElement || navigator.maxTouchPoints > 0;
      this._pointerEvent = Boolean(window.PointerEvent);

      this._addEventListeners();
    } // Getters


    static get Default() {
      return Default;
    }

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


    next() {
      this._slide(ORDER_NEXT);
    }

    nextWhenVisible() {
      // Don't call next when the page isn't visible
      // or the carousel or its parent isn't visible
      if (!document.hidden && isVisible(this._element)) {
        this.next();
      }
    }

    prev() {
      this._slide(ORDER_PREV);
    }

    pause(event) {
      if (!event) {
        this._isPaused = true;
      }

      if (SelectorEngine__default.default.findOne(SELECTOR_NEXT_PREV, this._element)) {
        triggerTransitionEnd(this._element);
        this.cycle(true);
      }

      clearInterval(this._interval);
      this._interval = null;
    }

    cycle(event) {
      if (!event) {
        this._isPaused = false;
      }

      if (this._interval) {
        clearInterval(this._interval);
        this._interval = null;
      }

      if (this._config && this._config.interval && !this._isPaused) {
        this._updateInterval();

        this._interval = setInterval((document.visibilityState ? this.nextWhenVisible : this.next).bind(this), this._config.interval);
      }
    }

    to(index) {
      this._activeElement = SelectorEngine__default.default.findOne(SELECTOR_ACTIVE_ITEM, this._element);

      const activeIndex = this._getItemIndex(this._activeElement);

      if (index > this._items.length - 1 || index < 0) {
        return;
      }

      if (this._isSliding) {
        EventHandler__default.default.one(this._element, EVENT_SLID, () => this.to(index));
        return;
      }

      if (activeIndex === index) {
        this.pause();
        this.cycle();
        return;
      }

      const order = index > activeIndex ? ORDER_NEXT : ORDER_PREV;

      this._slide(order, this._items[index]);
    } // Private


    _getConfig(config) {
      config = { ...Default,
        ...Manipulator__default.default.getDataAttributes(this._element),
        ...(typeof config === 'object' ? config : {})
      };
      typeCheckConfig(NAME, config, DefaultType);
      return config;
    }

    _handleSwipe() {
      const absDeltax = Math.abs(this.touchDeltaX);

      if (absDeltax <= SWIPE_THRESHOLD) {
        return;
      }

      const direction = absDeltax / this.touchDeltaX;
      this.touchDeltaX = 0;

      if (!direction) {
        return;
      }

      this._slide(direction > 0 ? DIRECTION_RIGHT : DIRECTION_LEFT);
    }

    _addEventListeners() {
      if (this._config.keyboard) {
        EventHandler__default.default.on(this._element, EVENT_KEYDOWN, event => this._keydown(event));
      }

      if (this._config.pause === 'hover') {
        EventHandler__default.default.on(this._element, EVENT_MOUSEENTER, event => this.pause(event));
        EventHandler__default.default.on(this._element, EVENT_MOUSELEAVE, event => this.cycle(event));
      }

      if (this._config.touch && this._touchSupported) {
        this._addTouchEventListeners();
      }
    }

    _addTouchEventListeners() {
      const hasPointerPenTouch = event => {
        return this._pointerEvent && (event.pointerType === POINTER_TYPE_PEN || event.pointerType === POINTER_TYPE_TOUCH);
      };

      const start = event => {
        if (hasPointerPenTouch(event)) {
          this.touchStartX = event.clientX;
        } else if (!this._pointerEvent) {
          this.touchStartX = event.touches[0].clientX;
        }
      };

      const move = event => {
        // ensure swiping with one touch and not pinching
        this.touchDeltaX = event.touches && event.touches.length > 1 ? 0 : event.touches[0].clientX - this.touchStartX;
      };

      const end = event => {
        if (hasPointerPenTouch(event)) {
          this.touchDeltaX = event.clientX - this.touchStartX;
        }

        this._handleSwipe();

        if (this._config.pause === 'hover') {
          // If it's a touch-enabled device, mouseenter/leave are fired as
          // part of the mouse compatibility events on first tap - the carousel
          // would stop cycling until user tapped out of it;
          // here, we listen for touchend, explicitly pause the carousel
          // (as if it's the second time we tap on it, mouseenter compat event
          // is NOT fired) and after a timeout (to allow for mouse compatibility
          // events to fire) we explicitly restart cycling
          this.pause();

          if (this.touchTimeout) {
            clearTimeout(this.touchTimeout);
          }

          this.touchTimeout = setTimeout(event => this.cycle(event), TOUCHEVENT_COMPAT_WAIT + this._config.interval);
        }
      };

      SelectorEngine__default.default.find(SELECTOR_ITEM_IMG, this._element).forEach(itemImg => {
        EventHandler__default.default.on(itemImg, EVENT_DRAG_START, event => event.preventDefault());
      });

      if (this._pointerEvent) {
        EventHandler__default.default.on(this._element, EVENT_POINTERDOWN, event => start(event));
        EventHandler__default.default.on(this._element, EVENT_POINTERUP, event => end(event));

        this._element.classList.add(CLASS_NAME_POINTER_EVENT);
      } else {
        EventHandler__default.default.on(this._element, EVENT_TOUCHSTART, event => start(event));
        EventHandler__default.default.on(this._element, EVENT_TOUCHMOVE, event => move(event));
        EventHandler__default.default.on(this._element, EVENT_TOUCHEND, event => end(event));
      }
    }

    _keydown(event) {
      if (/input|textarea/i.test(event.target.tagName)) {
        return;
      }

      const direction = KEY_TO_DIRECTION[event.key];

      if (direction) {
        event.preventDefault();

        this._slide(direction);
      }
    }

    _getItemIndex(element) {
      this._items = element && element.parentNode ? SelectorEngine__default.default.find(SELECTOR_ITEM, element.parentNode) : [];
      return this._items.indexOf(element);
    }

    _getItemByOrder(order, activeElement) {
      const isNext = order === ORDER_NEXT;
      return getNextActiveElement(this._items, activeElement, isNext, this._config.wrap);
    }

    _triggerSlideEvent(relatedTarget, eventDirectionName) {
      const targetIndex = this._getItemIndex(relatedTarget);

      const fromIndex = this._getItemIndex(SelectorEngine__default.default.findOne(SELECTOR_ACTIVE_ITEM, this._element));

      return EventHandler__default.default.trigger(this._element, EVENT_SLIDE, {
        relatedTarget,
        direction: eventDirectionName,
        from: fromIndex,
        to: targetIndex
      });
    }

    _setActiveIndicatorElement(element) {
      if (this._indicatorsElement) {
        const activeIndicator = SelectorEngine__default.default.findOne(SELECTOR_ACTIVE, this._indicatorsElement);
        activeIndicator.classList.remove(CLASS_NAME_ACTIVE);
        activeIndicator.removeAttribute('aria-current');
        const indicators = SelectorEngine__default.default.find(SELECTOR_INDICATOR, this._indicatorsElement);

        for (let i = 0; i < indicators.length; i++) {
          if (Number.parseInt(indicators[i].getAttribute('data-bs-slide-to'), 10) === this._getItemIndex(element)) {
            indicators[i].classList.add(CLASS_NAME_ACTIVE);
            indicators[i].setAttribute('aria-current', 'true');
            break;
          }
        }
      }
    }

    _updateInterval() {
      const element = this._activeElement || SelectorEngine__default.default.findOne(SELECTOR_ACTIVE_ITEM, this._element);

      if (!element) {
        return;
      }

      const elementInterval = Number.parseInt(element.getAttribute('data-bs-interval'), 10);

      if (elementInterval) {
        this._config.defaultInterval = this._config.defaultInterval || this._config.interval;
        this._config.interval = elementInterval;
      } else {
        this._config.interval = this._config.defaultInterval || this._config.interval;
      }
    }

    _slide(directionOrOrder, element) {
      const order = this._directionToOrder(directionOrOrder);

      const activeElement = SelectorEngine__default.default.findOne(SELECTOR_ACTIVE_ITEM, this._element);

      const activeElementIndex = this._getItemIndex(activeElement);

      const nextElement = element || this._getItemByOrder(order, activeElement);

      const nextElementIndex = this._getItemIndex(nextElement);

      const isCycling = Boolean(this._interval);
      const isNext = order === ORDER_NEXT;
      const directionalClassName = isNext ? CLASS_NAME_START : CLASS_NAME_END;
      const orderClassName = isNext ? CLASS_NAME_NEXT : CLASS_NAME_PREV;

      const eventDirectionName = this._orderToDirection(order);

      if (nextElement && nextElement.classList.contains(CLASS_NAME_ACTIVE)) {
        this._isSliding = false;
        return;
      }

      if (this._isSliding) {
        return;
      }

      const slideEvent = this._triggerSlideEvent(nextElement, eventDirectionName);

      if (slideEvent.defaultPrevented) {
        return;
      }

      if (!activeElement || !nextElement) {
        // Some weirdness is happening, so we bail
        return;
      }

      this._isSliding = true;

      if (isCycling) {
        this.pause();
      }

      this._setActiveIndicatorElement(nextElement);

      this._activeElement = nextElement;

      const triggerSlidEvent = () => {
        EventHandler__default.default.trigger(this._element, EVENT_SLID, {
          relatedTarget: nextElement,
          direction: eventDirectionName,
          from: activeElementIndex,
          to: nextElementIndex
        });
      };

      if (this._element.classList.contains(CLASS_NAME_SLIDE)) {
        nextElement.classList.add(orderClassName);
        reflow(nextElement);
        activeElement.classList.add(directionalClassName);
        nextElement.classList.add(directionalClassName);

        const completeCallBack = () => {
          nextElement.classList.remove(directionalClassName, orderClassName);
          nextElement.classList.add(CLASS_NAME_ACTIVE);
          activeElement.classList.remove(CLASS_NAME_ACTIVE, orderClassName, directionalClassName);
          this._isSliding = false;
          setTimeout(triggerSlidEvent, 0);
        };

        this._queueCallback(completeCallBack, activeElement, true);
      } else {
        activeElement.classList.remove(CLASS_NAME_ACTIVE);
        nextElement.classList.add(CLASS_NAME_ACTIVE);
        this._isSliding = false;
        triggerSlidEvent();
      }

      if (isCycling) {
        this.cycle();
      }
    }

    _directionToOrder(direction) {
      if (![DIRECTION_RIGHT, DIRECTION_LEFT].includes(direction)) {
        return direction;
      }

      if (isRTL()) {
        return direction === DIRECTION_LEFT ? ORDER_PREV : ORDER_NEXT;
      }

      return direction === DIRECTION_LEFT ? ORDER_NEXT : ORDER_PREV;
    }

    _orderToDirection(order) {
      if (![ORDER_NEXT, ORDER_PREV].includes(order)) {
        return order;
      }

      if (isRTL()) {
        return order === ORDER_PREV ? DIRECTION_LEFT : DIRECTION_RIGHT;
      }

      return order === ORDER_PREV ? DIRECTION_RIGHT : DIRECTION_LEFT;
    } // Static


    static carouselInterface(element, config) {
      const data = Carousel.getOrCreateInstance(element, config);
      let {
        _config
      } = data;

      if (typeof config === 'object') {
        _config = { ..._config,
          ...config
        };
      }

      const action = typeof config === 'string' ? config : _config.slide;

      if (typeof config === 'number') {
        data.to(config);
      } else if (typeof action === 'string') {
        if (typeof data[action] === 'undefined') {
          throw new TypeError(`No method named "${action}"`);
        }

        data[action]();
      } else if (_config.interval && _config.ride) {
        data.pause();
        data.cycle();
      }
    }

    static jQueryInterface(config) {
      return this.each(function () {
        Carousel.carouselInterface(this, config);
      });
    }

    static dataApiClickHandler(event) {
      const target = getElementFromSelector(this);

      if (!target || !target.classList.contains(CLASS_NAME_CAROUSEL)) {
        return;
      }

      const config = { ...Manipulator__default.default.getDataAttributes(target),
        ...Manipulator__default.default.getDataAttributes(this)
      };
      const slideIndex = this.getAttribute('data-bs-slide-to');

      if (slideIndex) {
        config.interval = false;
      }

      Carousel.carouselInterface(target, config);

      if (slideIndex) {
        Carousel.getInstance(target).to(slideIndex);
      }

      event.preventDefault();
    }

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


  EventHandler__default.default.on(document, EVENT_CLICK_DATA_API, SELECTOR_DATA_SLIDE, Carousel.dataApiClickHandler);
  EventHandler__default.default.on(window, EVENT_LOAD_DATA_API, () => {
    const carousels = SelectorEngine__default.default.find(SELECTOR_DATA_RIDE);

    for (let i = 0, len = carousels.length; i < len; i++) {
      Carousel.carouselInterface(carousels[i], Carousel.getInstance(carousels[i]));
    }
  });
  /**
   * ------------------------------------------------------------------------
   * jQuery
   * ------------------------------------------------------------------------
   * add .Carousel to jQuery only if jQuery is present
   */

  defineJQueryPlugin(Carousel);

  return Carousel;

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