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248 lines
8.5 KiB
Markdown
248 lines
8.5 KiB
Markdown
---
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layout: docs
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title: Carousel
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group: components
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---
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A slideshow component for cycling through elements—images or slides of text—like a carousel. In browsers where the [Page Visibility API](http://www.w3.org/TR/page-visibility/) is supported, the carousel will avoid sliding when the webpage is not visible to the user (such as when the browser tab is inactive, the browser window is minimized, etc.). **Nested carousels are not supported.**
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## Contents
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* Will be replaced with the ToC, excluding the "Contents" header
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{:toc}
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## Example
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{% example html %}
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<div id="carousel-example-generic" class="carousel slide" data-ride="carousel">
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<ol class="carousel-indicators">
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<li data-target="#carousel-example-generic" data-slide-to="0" class="active"></li>
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<li data-target="#carousel-example-generic" data-slide-to="1"></li>
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<li data-target="#carousel-example-generic" data-slide-to="2"></li>
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</ol>
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<div class="carousel-inner" role="listbox">
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<div class="carousel-item active">
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<img data-src="holder.js/900x500/auto/#777:#555/text:First slide" alt="First slide">
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</div>
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<div class="carousel-item">
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<img data-src="holder.js/900x500/auto/#666:#444/text:Second slide" alt="Second slide">
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</div>
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<div class="carousel-item">
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<img data-src="holder.js/900x500/auto/#555:#333/text:Third slide" alt="Third slide">
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</div>
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</div>
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<a class="left carousel-control" href="#carousel-example-generic" role="button" data-slide="prev">
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<span class="icon-prev" aria-hidden="true"></span>
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<span class="sr-only">Previous</span>
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</a>
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<a class="right carousel-control" href="#carousel-example-generic" role="button" data-slide="next">
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<span class="icon-next" aria-hidden="true"></span>
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<span class="sr-only">Next</span>
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</a>
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</div>
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{% endexample %}
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{% callout warning %}
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#### Transition animations not supported in Internet Explorer 9
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Bootstrap exclusively uses CSS3 for its animations, but Internet Explorer 9 doesn't support the necessary CSS properties. Thus, there are no slide transition animations when using that browser. We have intentionally decided not to include jQuery-based fallbacks for the transitions.
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{% endcallout %}
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{% callout warning %}
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#### Initial active element required
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The `.active` class needs to be added to one of the slides. Otherwise, the carousel will not be visible.
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{% endcallout %}
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### Optional captions
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Add captions to your slides easily with the `.carousel-caption` element within any `.carousel-item`. Place just about any optional HTML within there and it will be automatically aligned and formatted.
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<div class="bd-example">
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<div id="carousel-example-captions" class="carousel slide" data-ride="carousel">
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<ol class="carousel-indicators">
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<li data-target="#carousel-example-captions" data-slide-to="0" class="active"></li>
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<li data-target="#carousel-example-captions" data-slide-to="1"></li>
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<li data-target="#carousel-example-captions" data-slide-to="2"></li>
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</ol>
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<div class="carousel-inner" role="listbox">
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<div class="carousel-item active">
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<img data-src="holder.js/900x500/auto/#777:#777" alt="First slide image">
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<div class="carousel-caption">
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<h3>First slide label</h3>
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<p>Nulla vitae elit libero, a pharetra augue mollis interdum.</p>
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</div>
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</div>
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<div class="carousel-item">
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<img data-src="holder.js/900x500/auto/#666:#666" alt="Second slide image">
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<div class="carousel-caption">
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<h3>Second slide label</h3>
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<p>Lorem ipsum dolor sit amet, consectetur adipiscing elit.</p>
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</div>
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</div>
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<div class="carousel-item">
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<img data-src="holder.js/900x500/auto/#555:#555" alt="Third slide image">
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<div class="carousel-caption">
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<h3>Third slide label</h3>
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<p>Praesent commodo cursus magna, vel scelerisque nisl consectetur.</p>
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</div>
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</div>
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</div>
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<a class="left carousel-control" href="#carousel-example-captions" role="button" data-slide="prev">
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<span class="icon-prev" aria-hidden="true"></span>
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<span class="sr-only">Previous</span>
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</a>
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<a class="right carousel-control" href="#carousel-example-captions" role="button" data-slide="next">
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<span class="icon-next" aria-hidden="true"></span>
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<span class="sr-only">Next</span>
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</a>
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</div>
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</div>
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{% highlight html %}
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<div class="carousel-item">
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<img src="..." alt="...">
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<div class="carousel-caption">
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<h3>...</h3>
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<p>...</p>
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</div>
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</div>
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{% endhighlight %}
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{% callout danger %}
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#### Accessibility issue
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The carousel component is generally not compliant with accessibility standards. If you need to be compliant, please consider other options for presenting your content.
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{% endcallout %}
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## Usage
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### Multiple carousels
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Carousels require the use of an `id` on the outermost container (the `.carousel`) for carousel controls to function properly. When adding multiple carousels, or when changing a carousel's `id`, be sure to update the relevant controls.
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### Via data attributes
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Use data attributes to easily control the position of the carousel. `data-slide` accepts the keywords `prev` or `next`, which alters the slide position relative to its current position. Alternatively, use `data-slide-to` to pass a raw slide index to the carousel `data-slide-to="2"`, which shifts the slide position to a particular index beginning with `0`.
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The `data-ride="carousel"` attribute is used to mark a carousel as animating starting at page load. **It cannot be used in combination with (redundant and unnecessary) explicit JavaScript initialization of the same carousel.**
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### Via JavaScript
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Call carousel manually with:
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{% highlight js %}
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$('.carousel').carousel()
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{% endhighlight %}
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### Options
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Options can be passed via data attributes or JavaScript. For data attributes, append the option name to `data-`, as in `data-interval=""`.
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<div class="table-responsive">
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<table class="table table-bordered table-striped">
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<thead>
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<tr>
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<th style="width: 100px;">Name</th>
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<th style="width: 50px;">Type</th>
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<th style="width: 50px;">Default</th>
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<th>Description</th>
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</tr>
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</thead>
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<tbody>
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<tr>
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<td>interval</td>
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<td>number</td>
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<td>5000</td>
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<td>The amount of time to delay between automatically cycling an item. If false, carousel will not automatically cycle.</td>
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</tr>
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<tr>
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<td>pause</td>
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<td>string</td>
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<td>"hover"</td>
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<td>Pauses the cycling of the carousel on mouseenter and resumes the cycling of the carousel on mouseleave.</td>
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</tr>
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<tr>
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<td>wrap</td>
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<td>boolean</td>
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<td>true</td>
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<td>Whether the carousel should cycle continuously or have hard stops.</td>
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</tr>
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<tr>
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<td>keyboard</td>
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<td>boolean</td>
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<td>true</td>
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<td>Whether the carousel should react to keyboard events.</td>
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</tr>
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</tbody>
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</table>
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</div>
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### Methods
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#### `.carousel(options)`
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Initializes the carousel with an optional options `object` and starts cycling through items.
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{% highlight js %}
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$('.carousel').carousel({
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interval: 2000
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})
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{% endhighlight %}
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#### `.carousel('cycle')`
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Cycles through the carousel items from left to right.
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#### `.carousel('pause')`
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Stops the carousel from cycling through items.
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#### `.carousel(number)`
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Cycles the carousel to a particular frame (0 based, similar to an array).
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#### `.carousel('prev')`
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Cycles to the previous item.
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#### `.carousel('next')`
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Cycles to the next item.
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### Events
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Bootstrap's carousel class exposes two events for hooking into carousel functionality. Both events have the following additional properties:
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- `direction`: The direction in which the carousel is sliding (either `"left"` or `"right"`).
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- `relatedTarget`: The DOM element that is being slid into place as the active item.
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All carousel events are fired at the carousel itself (i.e. at the `<div class="carousel">`).
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<div class="table-responsive">
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<table class="table table-bordered table-striped">
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<thead>
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<tr>
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<th style="width: 150px;">Event Type</th>
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<th>Description</th>
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</tr>
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</thead>
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<tbody>
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<tr>
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<td>slide.bs.carousel</td>
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<td>This event fires immediately when the <code>slide</code> instance method is invoked.</td>
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</tr>
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<tr>
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<td>slid.bs.carousel</td>
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<td>This event is fired when the carousel has completed its slide transition.</td>
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</tr>
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</tbody>
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</table>
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</div>
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{% highlight js %}
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$('#myCarousel').on('slide.bs.carousel', function () {
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// do something…
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})
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{% endhighlight %}
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