- The carousel is a slideshow for cycling through a series of content, built with CSS 3D transforms and a bit of JavaScript. It works with a series of images, text, or custom markup. It also includes support for previous/next controls and indicators.
- For performance reasons, **carousels must be manually initialized** using the [carousel constructor method](#methods). Without initialization, some of the event listeners (specifically, the events needed touch/swipe support) will not be registered until a user has explicitly activated a control or indicator.
The only exception are [autoplaying carousels](#autoplaying-carousels) with the `data-bs-ride="carousel"` attribute as these are initialized automatically on page load. If you're using autoplaying carousels with the data attribute, **don't explicitly initialize the same carousels with the constructor method.**
Here is a basic example of a carousel with three slides. Note the previous/next controls. We recommend using `<button>` elements, but you can also use `<a>` elements with `role="button"`.
Carousels don't automatically normalize slide dimensions. As such, you may need to use additional utilities or custom styles to appropriately size content. While carousels support previous/next controls and indicators, they're not explicitly required. Add and customize as you see fit.
**You must add the `.active` class to one of the slides**, otherwise the carousel will not be visible. Also be sure to set a unique `id` on the `.carousel` for optional controls, especially if you're using multiple carousels on a single page. Control and indicator elements must have a `data-bs-target` attribute (or `href` for links) that matches the `id` of the `.carousel` element.
You can add captions to your slides with the `.carousel-caption` element within any `.carousel-item`. They can be easily hidden on smaller viewports, as shown below, with optional [display utilities]({{< docsref "/utilities/display" >}}). We hide them initially with `.d-none` and bring them back on medium-sized devices with `.d-md-block`.
Add `.carousel-fade` to your carousel to animate slides with a fade transition instead of a slide. Depending on your carousel content (e.g., text only slides), you may want to add `.bg-body` or some custom CSS to the `.carousel-item`s for proper crossfading.
You can make your carousels autoplay on page load by setting the `ride` option to `carousel`. Autoplaying carousels automatically pause while hovered with the mouse. This behavior can be controlled with the `pause` option. In browsers that support the [Page Visibility API](https://www.w3.org/TR/page-visibility/), the carousel will stop cycling when the webpage is not visible to the user (such as when the browser tab is inactive, or when the browser window is minimized).
{{<calloutinfo>}}
For accessibility reasons, we recommend avoiding the use of autoplaying carousels. If your page does include an autoplaying carousel, we recommend providing an additional button or control to explicitly pause/stop the carousel.
See [WCAG 2.1 Success Criterion 2.2.2 Pause, Stop, Hide](https://www.w3.org/TR/WCAG21/#pause-stop-hide).
When the `ride` option is set to `true`, rather than `carousel`, the carousel won't automatically start to cycle on page load. Instead, it will only start after the first user interaction.
Add `.carousel-dark` to the `.carousel` for darker controls, indicators, and captions. Controls are inverted compared to their default white fill with the `filter` CSS property. Captions and controls have additional Sass variables that customize the `color` and `background-color`.
The transition duration of `.carousel-item` can be changed with the `$carousel-transition-duration` Sass variable before compiling or custom styles if you're using the compiled CSS. If multiple transitions are applied, make sure the transform transition is defined first (e.g. `transition: transform 2s ease, opacity .5s ease-out`).
Use data attributes to easily control the position of the carousel. `data-bs-slide` accepts the keywords `prev` or `next`, which alters the slide position relative to its current position. Alternatively, use `data-bs-slide-to` to pass a raw slide index to the carousel `data-bs-slide-to="2"`, which shifts the slide position to a particular index beginning with `0`.
### Via JavaScript
Call carousel manually with:
```js
const carousel = new bootstrap.Carousel('#myCarousel')
```
### Options
{{<markdown>}}
{{<partial"js-data-attributes.md">}}
{{</markdown>}}
{{<bs-table>}}
| Name | Type | Default | Description |
| --- | --- | --- | --- |
| `interval` | number | `5000` | The amount of time to delay between automatically cycling an item. |
| `keyboard` | boolean | `true` | Whether the carousel should react to keyboard events. |
| `pause` | string, boolean | `"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 `false`, hovering over the carousel won't pause it. On touch-enabled devices, when set to `"hover"`, cycling will pause on `touchend` (once the user finished interacting with the carousel) for two intervals, before automatically resuming. This is in addition to the mouse behavior. |
| `ride` | string, boolean | `false` | If set to `true`, autoplays the carousel after the user manually cycles the first item. If set to `"carousel"`, autoplays the carousel on load. |
| `touch` | boolean | `true` | Whether the carousel should support left/right swipe interactions on touchscreen devices. |
| `wrap` | boolean | `true` | Whether the carousel should cycle continuously or have hard stops. |
You can create a carousel instance with the carousel constructor, and pass on any additional options. For example, to manually initialize an autoplaying carousel (assuming you're not using the `data-bs-ride="carousel"` attribute in the markup itself) with a specific interval and with touch support disabled, you can use:
| `getInstance` | Static method which allows you to get the carousel instance associated to a DOM element. You can use it like this: `bootstrap.Carousel.getInstance(element)`. |
| `getOrCreateInstance` | Static method which returns a carousel instance associated to a DOM element, or creates a new one in case it wasn't initialized. You can use it like this: `bootstrap.Carousel.getOrCreateInstance(element)`. |
| `next` | Cycles to the next item. **Returns to the caller before the next item has been shown** (e.g., before the `slid.bs.carousel` event occurs). |
| `nextWhenVisible` | Don't cycle carousel to next when the page, the carousel, or the carousel's parent aren't visible. **Returns to the caller before the target item has been shown**. |
| `pause` | Stops the carousel from cycling through items. |
| `prev` | Cycles to the previous item. **Returns to the caller before the previous item has been shown** (e.g., before the `slid.bs.carousel` event occurs). |
| `to` | Cycles the carousel to a particular frame (0 based, similar to an array). **Returns to the caller before the target item has been shown** (e.g., before the `slid.bs.carousel` event occurs). |
{{</bs-table>}}
### 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.
-`from`: The index of the current item
-`to`: The index of the next item
All carousel events are fired at the carousel itself (i.e. at the `<div class="carousel">`).
{{<bs-table>}}
| Event type | Description |
| --- | --- |
| `slid.bs.carousel` | Fired when the carousel has completed its slide transition. |
| `slide.bs.carousel` | Fires immediately when the `slide` instance method is invoked. |
