9.2 KiB
| layout | title | description | group |
|---|---|---|---|
| docs | Carousel | A slideshow component for cycling through elements—images or slides of text—like a carousel. | components |
A slideshow component for cycling through elements—images or slides of text—like a carousel. In browsers where the Page Visibility API 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.
Contents
- Will be replaced with the ToC, excluding the "Contents" header {:toc}
Example
When building carousels, be sure your slides are the same size as one another. The carousel doesn't automatically crop images to the same dimensions for you across slides.
{% example html %}
{% endexample %}{% callout warning %}
Transition animations not supported in Internet Explorer 9
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. {% endcallout %}
{% callout warning %}
Initial active element required
The .active class needs to be added to one of the slides. Otherwise, the carousel will not be visible.
{% endcallout %}
Optional captions
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.
{% highlight html %}
...
...
{% callout danger %}
Accessibility issue
The carousel component is generally not compliant with accessibility standards. If you need to be compliant, please consider other options for presenting your content. {% endcallout %}
Usage
Multiple carousels
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.
Via data attributes
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.
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.
Via JavaScript
Call carousel manually with:
{% highlight js %} $('.carousel').carousel() {% endhighlight %}
Options
Options can be passed via data attributes or JavaScript. For data attributes, append the option name to data-, as in data-interval="".
| Name | Type | Default | Description |
|---|---|---|---|
| interval | number | 5000 | The amount of time to delay between automatically cycling an item. If false, carousel will not automatically cycle. |
| keyboard | boolean | true | Whether the carousel should react to keyboard events. |
| pause | string | null | "hover" | If set to "hover", pauses the cycling of the carousel on mouseenter and resumes the cycling of the carousel on mouseleave. If set to null, hovering over the carousel won't pause it. |
| ride | string | false | Autoplays the carousel after the user manually cycles the first item. If "carousel", autoplays the carousel on load. |
| wrap | boolean | true | Whether the carousel should cycle continuously or have hard stops. |
Methods
.carousel(options)
Initializes the carousel with an optional options object and starts cycling through items.
{% highlight js %} $('.carousel').carousel({ interval: 2000 }) {% endhighlight %}
.carousel('cycle')
Cycles through the carousel items from left to right.
.carousel('pause')
Stops the carousel from cycling through items.
.carousel(number)
Cycles the carousel to a particular frame (0 based, similar to an array).
.carousel('prev')
Cycles to the previous item.
.carousel('next')
Cycles to the next item.
Events
Bootstrap's carousel class exposes two events for hooking into carousel functionality. Both events have the following additional properties:
direction: The direction in which the carousel is sliding (either"left"or"right").relatedTarget: The DOM element that is being slid into place as the active item.
All carousel events are fired at the carousel itself (i.e. at the <div class="carousel">).
| Event Type | Description |
|---|---|
| slide.bs.carousel | This event fires immediately when the slide instance method is invoked. |
| slid.bs.carousel | This event is fired when the carousel has completed its slide transition. |
{% highlight js %} $('#myCarousel').on('slide.bs.carousel', function () { // do something… }) {% endhighlight %}