text: /**
   * --------------------------------------------------------------------------
   * Bootstrap (v5.0.0-beta1): carousel.js
   * Licensed under MIT (https://github.com/twbs/bootstrap/blob/main/LICENSE)
   * --------------------------------------------------------------------------
   */
  
  import {
    getjQuery,
    onDOMContentLoaded,
    TRANSITION_END,
    emulateTransitionEnd,
    getElementFromSelector,
    getTransitionDurationFromElement,
    isVisible,
    reflow,
    triggerTransitionEnd,
    typeCheckConfig,
  } from './util/index';
  import Data from './dom/data';
  import EventHandler from './dom/event-handler';
  import Manipulator from './dom/manipulator';
  import SelectorEngine from './dom/selector-engine';
  import BaseComponent from './base-component';
  
  /**
   * ------------------------------------------------------------------------
   * 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 DIRECTION_NEXT = 'next';
  const DIRECTION_PREV = 'prev';
  const DIRECTION_LEFT = 'left';
  const DIRECTION_RIGHT = 'right';
  
  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_DATA_SLIDE = '[data-bs-slide], [data-bs-slide-to]';
  const SELECTOR_DATA_RIDE = '[data-bs-ride="carousel"]';
  
  const PointerType = {
    TOUCH: 'touch',
    PEN: 'pen',
  };
  
  /**
   * ------------------------------------------------------------------------
   * Class Definition
   * ------------------------------------------------------------------------
   */
  class Carousel extends BaseComponent {
    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.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 DATA_KEY() {
      return DATA_KEY;
    }
  
    // Public
  
    next() {
      if (!this._isSliding) {
        this._slide(DIRECTION_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() {
      if (!this._isSliding) {
        this._slide(DIRECTION_PREV);
      }
    }
  
    pause(event) {
      if (!event) {
        this._isPaused = true;
      }
  
      if (SelectorEngine.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.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.one(this._element, EVENT_SLID, () => this.to(index));
        return;
      }
  
      if (activeIndex === index) {
        this.pause();
        this.cycle();
        return;
      }
  
      const direction = index > activeIndex ? DIRECTION_NEXT : DIRECTION_PREV;
  
      this._slide(direction, this._items[index]);
    }
  
    dispose() {
      super.dispose();
      EventHandler.off(this._element, EVENT_KEY);
  
      this._items = null;
      this._config = null;
      this._interval = null;
      this._isPaused = null;
      this._isSliding = null;
      this._activeElement = null;
      this._indicatorsElement = null;
    }
  
    // Private
  
    _getConfig(config) {
      config = {
        ...Default,
        ...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;
  
      // swipe left
      if (direction > 0) {
        this.prev();
      }
  
      // swipe right
      if (direction < 0) {
        this.next();
      }
    }
  
    _addEventListeners() {
      if (this._config.keyboard) {
        EventHandler.on(this._element, EVENT_KEYDOWN, (event) => this._keydown(event));
      }
  
      if (this._config.pause === 'hover') {
        EventHandler.on(this._element, EVENT_MOUSEENTER, (event) => this.pause(event));
        EventHandler.on(this._element, EVENT_MOUSELEAVE, (event) => this.cycle(event));
      }
  
      if (this._config.touch && this._touchSupported) {
        this._addTouchEventListeners();
      }
    }
  
    _addTouchEventListeners() {
      const start = (event) => {
        if (this._pointerEvent && PointerType[event.pointerType.toUpperCase()]) {
          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
        if (event.touches && event.touches.length > 1) {
          this.touchDeltaX = 0;
        } else {
          this.touchDeltaX = event.touches[0].clientX - this.touchStartX;
        }
      };
  
      const end = (event) => {
        if (this._pointerEvent && PointerType[event.pointerType.toUpperCase()]) {
          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.find(SELECTOR_ITEM_IMG, this._element).forEach((itemImg) => {
        EventHandler.on(itemImg, EVENT_DRAG_START, (e) => e.preventDefault());
      });
  
      if (this._pointerEvent) {
        EventHandler.on(this._element, EVENT_POINTERDOWN, (event) => start(event));
        EventHandler.on(this._element, EVENT_POINTERUP, (event) => end(event));
  
        this._element.classList.add(CLASS_NAME_POINTER_EVENT);
      } else {
        EventHandler.on(this._element, EVENT_TOUCHSTART, (event) => start(event));
        EventHandler.on(this._element, EVENT_TOUCHMOVE, (event) => move(event));
        EventHandler.on(this._element, EVENT_TOUCHEND, (event) => end(event));
      }
    }
  
    _keydown(event) {
      if (/input|textarea/i.test(event.target.tagName)) {
        return;
      }
  
      switch (event.key) {
        case ARROW_LEFT_KEY:
          event.preventDefault();
          this.prev();
          break;
        case ARROW_RIGHT_KEY:
          event.preventDefault();
          this.next();
          break;
        default:
      }
    }
  
    _getItemIndex(element) {
      this._items =
        element && element.parentNode ? SelectorEngine.find(SELECTOR_ITEM, element.parentNode) : [];
  
      return this._items.indexOf(element);
    }
  
    _getItemByDirection(direction, activeElement) {
      const isNextDirection = direction === DIRECTION_NEXT;
      const isPrevDirection = direction === DIRECTION_PREV;
      const activeIndex = this._getItemIndex(activeElement);
      const lastItemIndex = this._items.length - 1;
      const isGoingToWrap =
        (isPrevDirection && activeIndex === 0) || (isNextDirection && activeIndex === lastItemIndex);
  
      if (isGoingToWrap && !this._config.wrap) {
        return activeElement;
      }
  
      const delta = direction === DIRECTION_PREV ? -1 : 1;
      const itemIndex = (activeIndex + delta) % this._items.length;
  
      return itemIndex === -1 ? this._items[this._items.length - 1] : this._items[itemIndex];
    }
  
    _triggerSlideEvent(relatedTarget, eventDirectionName) {
      const targetIndex = this._getItemIndex(relatedTarget);
      const fromIndex = this._getItemIndex(
        SelectorEngine.findOne(SELECTOR_ACTIVE_ITEM, this._element)
      );
  
      return EventHandler.trigger(this._element, EVENT_SLIDE, {
        relatedTarget,
        direction: eventDirectionName,
        from: fromIndex,
        to: targetIndex,
      });
    }
  
    _setActiveIndicatorElement(element) {
      if (this._indicatorsElement) {
        const indicators = SelectorEngine.find(SELECTOR_ACTIVE, this._indicatorsElement);
  
        for (let i = 0; i < indicators.length; i++) {
          indicators[i].classList.remove(CLASS_NAME_ACTIVE);
        }
  
        const nextIndicator = this._indicatorsElement.children[this._getItemIndex(element)];
  
        if (nextIndicator) {
          nextIndicator.classList.add(CLASS_NAME_ACTIVE);
        }
      }
    }
  
    _updateInterval() {
      const element =
        this._activeElement || SelectorEngine.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(direction, element) {
      const activeElement = SelectorEngine.findOne(SELECTOR_ACTIVE_ITEM, this._element);
      const activeElementIndex = this._getItemIndex(activeElement);
      const nextElement =
        element || (activeElement && this._getItemByDirection(direction, activeElement));
  
      const nextElementIndex = this._getItemIndex(nextElement);
      const isCycling = Boolean(this._interval);
  
      let directionalClassName;
      let orderClassName;
      let eventDirectionName;
  
      if (direction === DIRECTION_NEXT) {
        directionalClassName = CLASS_NAME_START;
        orderClassName = CLASS_NAME_NEXT;
        eventDirectionName = DIRECTION_LEFT;
      } else {
        directionalClassName = CLASS_NAME_END;
        orderClassName = CLASS_NAME_PREV;
        eventDirectionName = DIRECTION_RIGHT;
      }
  
      if (nextElement && nextElement.classList.contains(CLASS_NAME_ACTIVE)) {
        this._isSliding = false;
        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;
  
      if (this._element.classList.contains(CLASS_NAME_SLIDE)) {
        nextElement.classList.add(orderClassName);
  
        reflow(nextElement);
  
        activeElement.classList.add(directionalClassName);
        nextElement.classList.add(directionalClassName);
  
        const transitionDuration = getTransitionDurationFromElement(activeElement);
  
        EventHandler.one(activeElement, TRANSITION_END, () => {
          nextElement.classList.remove(directionalClassName, orderClassName);
          nextElement.classList.add(CLASS_NAME_ACTIVE);
  
          activeElement.classList.remove(CLASS_NAME_ACTIVE, orderClassName, directionalClassName);
  
          this._isSliding = false;
  
          setTimeout(() => {
            EventHandler.trigger(this._element, EVENT_SLID, {
              relatedTarget: nextElement,
              direction: eventDirectionName,
              from: activeElementIndex,
              to: nextElementIndex,
            });
          }, 0);
        });
  
        emulateTransitionEnd(activeElement, transitionDuration);
      } else {
        activeElement.classList.remove(CLASS_NAME_ACTIVE);
        nextElement.classList.add(CLASS_NAME_ACTIVE);
  
        this._isSliding = false;
        EventHandler.trigger(this._element, EVENT_SLID, {
          relatedTarget: nextElement,
          direction: eventDirectionName,
          from: activeElementIndex,
          to: nextElementIndex,
        });
      }
  
      if (isCycling) {
        this.cycle();
      }
    }
  
    // Static
  
    static carouselInterface(element, config) {
      let data = Data.getData(element, DATA_KEY);
      let _config = {
        ...Default,
        ...Manipulator.getDataAttributes(element),
      };
  
      if (typeof config === 'object') {
        _config = {
          ..._config,
          ...config,
        };
      }
  
      const action = typeof config === 'string' ? config : _config.slide;
  
      if (!data) {
        data = new Carousel(element, _config);
      }
  
      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.getDataAttributes(target),
        ...Manipulator.getDataAttributes(this),
      };
      const slideIndex = this.getAttribute('data-bs-slide-to');
  
      if (slideIndex) {
        config.interval = false;
      }
  
      Carousel.carouselInterface(target, config);
  
      if (slideIndex) {
        Data.getData(target, DATA_KEY).to(slideIndex);
      }
  
      event.preventDefault();
    }
  }
  
  /**
   * ------------------------------------------------------------------------
   * Data Api implementation
   * ------------------------------------------------------------------------
   */
  
  EventHandler.on(document, EVENT_CLICK_DATA_API, SELECTOR_DATA_SLIDE, Carousel.dataApiClickHandler);
  
  EventHandler.on(window, EVENT_LOAD_DATA_API, () => {
    const carousels = SelectorEngine.find(SELECTOR_DATA_RIDE);
  
    for (let i = 0, len = carousels.length; i < len; i++) {
      Carousel.carouselInterface(carousels[i], Data.getData(carousels[i], DATA_KEY));
    }
  });
  
  /**
   * ------------------------------------------------------------------------
   * jQuery
   * ------------------------------------------------------------------------
   * add .Carousel to jQuery only if jQuery is present
   */
  
  onDOMContentLoaded(() => {
    const $ = getjQuery();
    /* istanbul ignore if */
    if ($) {
      const JQUERY_NO_CONFLICT = $.fn[NAME];
      $.fn[NAME] = Carousel.jQueryInterface;
      $.fn[NAME].Constructor = Carousel;
      $.fn[NAME].noConflict = () => {
        $.fn[NAME] = JQUERY_NO_CONFLICT;
        return Carousel.jQueryInterface;
      };
    }
  });
  
  export default Carousel;
  