import $ from 'jquery' import Util from './util' /** * -------------------------------------------------------------------------- * Bootstrap (v4.0.0-beta.3): carousel.js * Licensed under MIT (https://github.com/twbs/bootstrap/blob/master/LICENSE) * -------------------------------------------------------------------------- */ const Carousel = (($) => { /** * ------------------------------------------------------------------------ * Constants * ------------------------------------------------------------------------ */ const NAME = 'carousel' const VERSION = '4.0.0-beta.3' const DATA_KEY = 'bs.carousel' const EVENT_KEY = `.${DATA_KEY}` const DATA_API_KEY = '.data-api' const JQUERY_NO_CONFLICT = $.fn[NAME] const TRANSITION_DURATION = 600 const ARROW_LEFT_KEYCODE = 37 // KeyboardEvent.which value for left arrow key const ARROW_RIGHT_KEYCODE = 39 // KeyboardEvent.which value for right arrow key const TOUCHEVENT_COMPAT_WAIT = 500 // Time for mouse compat events to fire after touch const Default = { interval : 5000, keyboard : true, slide : false, pause : 'hover', wrap : true } const DefaultType = { interval : '(number|boolean)', keyboard : 'boolean', slide : '(boolean|string)', pause : '(string|boolean)', wrap : 'boolean' } const Direction = { NEXT : 'next', PREV : 'prev', LEFT : 'left', RIGHT : 'right' } const Event = { SLIDE : `slide${EVENT_KEY}`, SLID : `slid${EVENT_KEY}`, KEYDOWN : `keydown${EVENT_KEY}`, MOUSEENTER : `mouseenter${EVENT_KEY}`, MOUSELEAVE : `mouseleave${EVENT_KEY}`, TOUCHEND : `touchend${EVENT_KEY}`, LOAD_DATA_API : `load${EVENT_KEY}${DATA_API_KEY}`, CLICK_DATA_API : `click${EVENT_KEY}${DATA_API_KEY}` } const ClassName = { CAROUSEL : 'carousel', ACTIVE : 'active', SLIDE : 'slide', RIGHT : 'carousel-item-right', LEFT : 'carousel-item-left', NEXT : 'carousel-item-next', PREV : 'carousel-item-prev', ITEM : 'carousel-item' } const Selector = { ACTIVE : '.active', ACTIVE_ITEM : '.active.carousel-item', ITEM : '.carousel-item', NEXT_PREV : '.carousel-item-next, .carousel-item-prev', INDICATORS : '.carousel-indicators', DATA_SLIDE : '[data-slide], [data-slide-to]', DATA_RIDE : '[data-ride="carousel"]' } /** * ------------------------------------------------------------------------ * Class Definition * ------------------------------------------------------------------------ */ class Carousel { constructor(element, config) { this._items = null this._interval = null this._activeElement = null this._isPaused = false this._isSliding = false this.touchTimeout = null this._config = this._getConfig(config) this._element = $(element)[0] this._indicatorsElement = $(this._element).find(Selector.INDICATORS)[0] this._addEventListeners() } // Getters static get VERSION() { return VERSION } static get Default() { return Default } // Public next() { if (!this._isSliding) { this._slide(Direction.NEXT) } } nextWhenVisible() { // Don't call next when the page isn't visible // or the carousel or its parent isn't visible if (!document.hidden && ($(this._element).is(':visible') && $(this._element).css('visibility') !== 'hidden')) { this.next() } } prev() { if (!this._isSliding) { this._slide(Direction.PREV) } } pause(event) { if (!event) { this._isPaused = true } if ($(this._element).find(Selector.NEXT_PREV)[0] && Util.supportsTransitionEnd()) { Util.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.interval && !this._isPaused) { this._interval = setInterval( (document.visibilityState ? this.nextWhenVisible : this.next).bind(this), this._config.interval ) } } to(index) { this._activeElement = $(this._element).find(Selector.ACTIVE_ITEM)[0] const activeIndex = this._getItemIndex(this._activeElement) if (index > this._items.length - 1 || index < 0) { return } if (this._isSliding) { $(this._element).one(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() { $(this._element).off(EVENT_KEY) $.removeData(this._element, DATA_KEY) this._items = null this._config = null this._element = null this._interval = null this._isPaused = null this._isSliding = null this._activeElement = null this._indicatorsElement = null } // Private _getConfig(config) { config = { ...Default, ...config } Util.typeCheckConfig(NAME, config, DefaultType) return config } _addEventListeners() { if (this._config.keyboard) { $(this._element) .on(Event.KEYDOWN, (event) => this._keydown(event)) } if (this._config.pause === 'hover') { $(this._element) .on(Event.MOUSEENTER, (event) => this.pause(event)) .on(Event.MOUSELEAVE, (event) => this.cycle(event)) if ('ontouchstart' in document.documentElement) { // 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._element).on(Event.TOUCHEND, () => { this.pause() if (this.touchTimeout) { clearTimeout(this.touchTimeout) } this.touchTimeout = setTimeout((event) => this.cycle(event), TOUCHEVENT_COMPAT_WAIT + this._config.interval) }) } } } _keydown(event) { if (/input|textarea/i.test(event.target.tagName)) { return } switch (event.which) { case ARROW_LEFT_KEYCODE: event.preventDefault() this.prev() break case ARROW_RIGHT_KEYCODE: event.preventDefault() this.next() break default: } } _getItemIndex(element) { this._items = $.makeArray($(element).parent().find(Selector.ITEM)) 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($(this._element).find(Selector.ACTIVE_ITEM)[0]) const slideEvent = $.Event(Event.SLIDE, { relatedTarget, direction: eventDirectionName, from: fromIndex, to: targetIndex }) $(this._element).trigger(slideEvent) return slideEvent } _setActiveIndicatorElement(element) { if (this._indicatorsElement) { $(this._indicatorsElement) .find(Selector.ACTIVE) .removeClass(ClassName.ACTIVE) const nextIndicator = this._indicatorsElement.children[ this._getItemIndex(element) ] if (nextIndicator) { $(nextIndicator).addClass(ClassName.ACTIVE) } } } _slide(direction, element) { const activeElement = $(this._element).find(Selector.ACTIVE_ITEM)[0] 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 = ClassName.LEFT orderClassName = ClassName.NEXT eventDirectionName = Direction.LEFT } else { directionalClassName = ClassName.RIGHT orderClassName = ClassName.PREV eventDirectionName = Direction.RIGHT } if (nextElement && $(nextElement).hasClass(ClassName.ACTIVE)) { this._isSliding = false return } const slideEvent = this._triggerSlideEvent(nextElement, eventDirectionName) if (slideEvent.isDefaultPrevented()) { return } if (!activeElement || !nextElement) { // Some weirdness is happening, so we bail return } this._isSliding = true if (isCycling) { this.pause() } this._setActiveIndicatorElement(nextElement) const slidEvent = $.Event(Event.SLID, { relatedTarget: nextElement, direction: eventDirectionName, from: activeElementIndex, to: nextElementIndex }) if (Util.supportsTransitionEnd() && $(this._element).hasClass(ClassName.SLIDE)) { $(nextElement).addClass(orderClassName) Util.reflow(nextElement) $(activeElement).addClass(directionalClassName) $(nextElement).addClass(directionalClassName) $(activeElement) .one(Util.TRANSITION_END, () => { $(nextElement) .removeClass(`${directionalClassName} ${orderClassName}`) .addClass(ClassName.ACTIVE) $(activeElement).removeClass(`${ClassName.ACTIVE} ${orderClassName} ${directionalClassName}`) this._isSliding = false setTimeout(() => $(this._element).trigger(slidEvent), 0) }) .emulateTransitionEnd(TRANSITION_DURATION) } else { $(activeElement).removeClass(ClassName.ACTIVE) $(nextElement).addClass(ClassName.ACTIVE) this._isSliding = false $(this._element).trigger(slidEvent) } if (isCycling) { this.cycle() } } // Static static _jQueryInterface(config) { return this.each(function () { let data = $(this).data(DATA_KEY) let _config = { ...Default, ...$(this).data() } if (typeof config === 'object') { _config = { ..._config, ...config } } const action = typeof config === 'string' ? config : _config.slide if (!data) { data = new Carousel(this, _config) $(this).data(DATA_KEY, data) } if (typeof config === 'number') { data.to(config) } else if (typeof action === 'string') { if (typeof data[action] === 'undefined') { throw new TypeError(`No method named "${action}"`) } data[action]() } else if (_config.interval) { data.pause() data.cycle() } }) } static _dataApiClickHandler(event) { const selector = Util.getSelectorFromElement(this) if (!selector) { return } const target = $(selector)[0] if (!target || !$(target).hasClass(ClassName.CAROUSEL)) { return } const config = { ...$(target).data(), ...$(this).data() } const slideIndex = this.getAttribute('data-slide-to') if (slideIndex) { config.interval = false } Carousel._jQueryInterface.call($(target), config) if (slideIndex) { $(target).data(DATA_KEY).to(slideIndex) } event.preventDefault() } } /** * ------------------------------------------------------------------------ * Data Api implementation * ------------------------------------------------------------------------ */ $(document) .on(Event.CLICK_DATA_API, Selector.DATA_SLIDE, Carousel._dataApiClickHandler) $(window).on(Event.LOAD_DATA_API, () => { $(Selector.DATA_RIDE).each(function () { const $carousel = $(this) Carousel._jQueryInterface.call($carousel, $carousel.data()) }) }) /** * ------------------------------------------------------------------------ * jQuery * ------------------------------------------------------------------------ */ $.fn[NAME] = Carousel._jQueryInterface $.fn[NAME].Constructor = Carousel $.fn[NAME].noConflict = function () { $.fn[NAME] = JQUERY_NO_CONFLICT return Carousel._jQueryInterface } return Carousel })($) export default Carousel