我正在使用carousel.js，但是当我使用控件时，它开始出现错误。
我注意到的是：
现在控制台中显示的错误是：Uncaught TypeError：无法读取未定义的属性“slice”，但我不认为这是错误的核心。 因为我在inspect元素中注意到的是，当错误发生时，幻灯片中的所有图像都没有类：'active'，因此代码将不再起作用。但我不确定原因是什么。
这是我的控件中的代码：
<a class="left carousel-control" href="#carousel-{$id}" data-slide="prev" role="button">
<span class="icon-arrow_left_nav icon-arrow-left2""></span>
</a>
<a class="right carousel-control" href="#carousel-{$id}" data-slide="next" role="button">
<span class="icon-arrow_right_nav icon-arrow-right2"></span>
</a>
这是来自carousel.js文件（标准）的代码
/* ========================================================================
* Bootstrap: carousel.js v3.2.0
* http://getbootstrap.com/javascript/#carousel
* ========================================================================
* Copyright 2011-2014 Twitter, Inc.
* Licensed under MIT (https://github.com/twbs/bootstrap/blob/master/LICENSE)
* ======================================================================== */
+function ($) {
'use strict';
// CAROUSEL CLASS DEFINITION
// =========================
var Carousel = function (element, options) {
this.$element = $(element).on('keydown.bs.carousel', $.proxy(this.keydown, this))
this.$indicators = this.$element.find('.carousel-indicators')
this.options = options
this.paused =
this.sliding =
this.interval =
this.$active =
this.$items = null
this.options.pause == 'hover' && this.$element
.on('mouseenter.bs.carousel', $.proxy(this.pause, this))
.on('mouseleave.bs.carousel', $.proxy(this.cycle, this))
}
Carousel.VERSION = '3.2.0'
Carousel.DEFAULTS = {
interval: 5000,
pause: 'hover',
wrap: true
}
Carousel.prototype.keydown = function (e) {
switch (e.which) {
case 37:
this.prev();
break
case 39:
this.next();
break
default:
return
}
e.preventDefault()
}
Carousel.prototype.cycle = function (e) {
e || (this.paused = false)
this.interval && clearInterval(this.interval)
this.options.interval
&& !this.paused
&& (this.interval = setInterval($.proxy(this.next, this), this.options.interval))
return this
}
Carousel.prototype.getItemIndex = function (item) {
this.$items = item.parent().children('div.item')
return this.$items.index(item || this.$active)
}
Carousel.prototype.to = function (pos) {
var that = this
var activeIndex = this.getItemIndex(this.$active = this.$element.find('div.item.active'))
if (pos > (this.$items.length - 1) || pos < 0) return
if (this.sliding) return this.$element.one('slid.bs.carousel', function () {
that.to(pos)
}) // yes, "slid"
if (activeIndex == pos) return this.pause().cycle()
return this.slide(pos > activeIndex ? 'next' : 'prev', $(this.$items[pos]))
}
Carousel.prototype.pause = function (e) {
e || (this.paused = true)
if (this.$element.find('.next, .prev').length && $.support.transition) {
this.$element.trigger($.support.transition.end)
this.cycle(true)
}
this.interval = clearInterval(this.interval)
return this
}
Carousel.prototype.next = function () {
if (this.sliding) return
return this.slide('next')
}
Carousel.prototype.prev = function () {
if (this.sliding) return
return this.slide('prev')
}
Carousel.prototype.slide = function (type, next) {
var $active = this.$element.find('div.item.active')
var $next = next || $active[type]()
var isCycling = this.interval
var direction = type == 'next' ? 'left' : 'right'
var fallback = type == 'next' ? 'first' : 'last'
var that = this
if (!$next.length) {
if (!this.options.wrap) return
$next = this.$element.find('div.item')[fallback]()
}
if ($next.hasClass('active')) return (this.sliding = false)
var relatedTarget = $next[0]
var slideEvent = $.Event('slide.bs.carousel', {
relatedTarget: relatedTarget,
direction: direction
})
this.$element.trigger(slideEvent)
if (slideEvent.isDefaultPrevented()) return
this.sliding = true
isCycling && this.pause()
if (this.$indicators.length) {
this.$indicators.find('.active').removeClass('active')
var $nextIndicator = $(this.$indicators.children()[this.getItemIndex($next)])
$nextIndicator && $nextIndicator.addClass('active')
}
var slidEvent = $.Event('slid.bs.carousel', {relatedTarget: relatedTarget, direction: direction}) // yes, "slid"
if ($.support.transition && this.$element.hasClass('slide')) {
$next.addClass(type)
$next[0].offsetWidth // force reflow
$active.addClass(direction)
$next.addClass(direction)
$active
.one('bsTransitionEnd', function () {
$next.removeClass([type, direction].join(' ')).addClass('active')
$active.removeClass(['active', direction].join(' '))
that.sliding = false
setTimeout(function () {
that.$element.trigger(slidEvent)
}, 0)
})
.emulateTransitionEnd($active.css('transition-duration').slice(0, -1) * 1000)
} else {
$active.removeClass('active')
$next.addClass('active')
this.sliding = false
this.$element.trigger(slidEvent)
}
isCycling && this.cycle()
return this
}
// CAROUSEL PLUGIN DEFINITION
// ==========================
function Plugin(option) {
return this.each(function () {
var $this = $(this)
var data = $this.data('bs.carousel')
var options = $.extend({}, Carousel.DEFAULTS, $this.data(), typeof option == 'object' && option)
var action = typeof option == 'string' ? option : options.slide
if (!data) $this.data('bs.carousel', (data = new Carousel(this, options)))
if (typeof option == 'number') data.to(option)
else if (action) data[action]()
else if (options.interval) data.pause().cycle()
})
}
var old = $.fn.carousel
$.fn.carousel = Plugin
$.fn.carousel.Constructor = Carousel
// CAROUSEL NO CONFLICT
// ====================
$.fn.carousel.noConflict = function () {
$.fn.carousel = old
return this
}
// CAROUSEL DATA-API
// =================
$(document).on('click.bs.carousel.data-api', '[data-slide], [data-slide-to]', function (e) {
var href
var $this = $(this)
var $target = $($this.attr('data-target') || (href = $this.attr('href')) && href.replace(/.*(?=#[^\s]+$)/, '')) // strip for ie7
if (!$target.hasClass('carousel')) return
var options = $.extend({}, $target.data(), $this.data())
var slideIndex = $this.attr('data-slide-to')
if (slideIndex) options.interval = false
Plugin.call($target, options)
if (slideIndex) {
$target.data('bs.carousel').to(slideIndex)
}
e.preventDefault()
})
$(window).on('load', function () {
$('[data-ride="carousel"]').each(function () {
var $carousel = $(this)
Plugin.call($carousel, $carousel.data())
})
})
}(jQuery);