embla-carousel

What is embla-carousel?

Embla Carousel is a lightweight, extendable, and customizable carousel library for modern web applications. It provides a simple API for creating responsive and touch-friendly carousels with various customization options.

What are embla-carousel's main functionalities?

Basic Carousel Setup

This code initializes a basic Embla Carousel on an HTML element with the class 'embla'.

const emblaNode = document.querySelector('.embla');
const embla = EmblaCarousel(emblaNode);

Custom Options

This code demonstrates how to initialize an Embla Carousel with custom options such as looping and speed.

const emblaNode = document.querySelector('.embla');
const options = { loop: true, speed: 10 };
const embla = EmblaCarousel(emblaNode, options);

Adding Plugins

This code shows how to add plugins to the Embla Carousel, such as the Autoplay plugin for automatic sliding.

import EmblaCarousel from 'embla-carousel';
import Autoplay from 'embla-carousel-autoplay';

const emblaNode = document.querySelector('.embla');
const embla = EmblaCarousel(emblaNode, { loop: true }, [Autoplay()]);

Event Handling

This code demonstrates how to handle events in Embla Carousel, such as logging the selected slide index when a slide is selected.

const emblaNode = document.querySelector('.embla');
const embla = EmblaCarousel(emblaNode);

embla.on('select', () => {
  console.log('Slide selected:', embla.selectedScrollSnap());
});

Other packages similar to embla-carousel

swiper

Swiper is a modern touch slider with hardware-accelerated transitions and a wide range of features. It is highly customizable and supports various effects, autoplay, and responsive breakpoints. Compared to Embla Carousel, Swiper offers more built-in features and effects but may be heavier in terms of bundle size.

slick-carousel

Slick Carousel is a popular and fully-featured carousel library that supports multiple breakpoints, lazy loading, and various transition effects. It is easy to set up and use but may not be as lightweight or modular as Embla Carousel.

react-slick

React Slick is a React wrapper for the Slick Carousel library. It provides the same features as Slick Carousel but is designed specifically for React applications. It offers a simple API for integrating carousels into React components. Compared to Embla Carousel, React Slick is more tailored for React but may not offer the same level of customization and modularity.

README

Embla Carousel

Extensible bare bone carousels for the web. Build awesome carousels by extending them with your own CSS and JavaScript. Embla Carousel is dependency free and 100% open source.

 TRY DEMO 

options   ·   api   ·   events

 

Installation

NPM

npm install embla-carousel

QuickStart

HTML

<div class="embla">
  <div class="embla__container">
    <div class="embla__slide">
      Slide 1
    </div>
    <div class="embla__slide">
      Slide 2
    </div>
    <div class="embla__slide">
      Slide 3
    </div>
    <div class="embla__slide">
      Slide 4
    </div>
  </div>
</div>

CSS

.embla {
  overflow: hidden;
}

.embla__container {
  display: flex;
}

.embla__slide {
  position: relative; /* Needed if loop: true */
  flex: 0 0 100%; /* Choose any slide width */
}

JavaScript

import EmblaCarousel from 'embla-carousel'

const emblaNode = document.querySelector('.embla')
const options = { loop: true }
const embla = EmblaCarousel(emblaNode, options)

Options

Configure Embla by passing an options object as the second argument. Default values are:

const embla = EmblaCarousel(emblaNode, {
  align: 'center',
  containerSelector: '*',
  slidesToScroll: 1,
  containScroll: false,
  draggable: true,
  dragFree: false,
  loop: false,
  speed: 10,
  startIndex: 0,
  selectedClass: 'is-selected',
  draggableClass: 'is-draggable',
  draggingClass: 'is-dragging',
})

align

Align the slides relative to the carousel viewport.

---

This option aligns the slides relative to the carousel viewport. Instead of using one of the predefined alignments start, center and end, you can provide a number to align the slides. For example, if you pass 0.2, slides will be aligned 20% from the viewport start edge. Note that slide alignments will be overrided for slides at the start and end when used together with containScroll , that prevents excessive scrolling at the beginning or end.

^{Type: string | number}

^{Allowed values: start center end number}

^{Default value: center}

  CodeSandbox

Usage

const options = { align: 'start' }
const embla = EmblaCarousel(emblaNode, options)

---

containerSelector

Target the slide container with a query selector.

---

This option allows for the use of a custom query selector to match the container that holds the slides. If no value is provided Embla will match any immediate html tag. All immediate children of this container will be treated as slides.

^{Type: string}

^{Allowed values: any}

^{Default value: *}

  CodeSandbox

Usage

const options = { containerSelector: '.my-container-selector' }
const embla = EmblaCarousel(emblaNode, options)

<div class="embla">
  <div class="my-container-selector">
    ...slides
  </div>
</div>

---

slidesToScroll

Scroll past the given number of slides.

---

This option groups slides together. Drag interactions, dot navigation, and previous/next buttons are mapped to group slides into the given number. For example, if the option is set to 2, every two slides will be treated as a single slide.

^{Type: number}

^{Allowed values: any}

^{Default value: 1}

  CodeSandbox

Usage

const options = { slidesToScroll: 2 }
const embla = EmblaCarousel(emblaNode, options)

.embla__slide {
  flex: 0 0 50%; /* Show 2 slides in viewport */
}

---

containScroll

Contain slides to the carousel viewport.

---

This option clears leading and trailing empty space that causes excessive scrolling. Note that this will override the chosen alignment for slides at the beginning or the end if necessary, in order to get rid of the empty space.

^{Type: boolean}

^{Allowed values: true false}

^{Default value: false}

  CodeSandbox

Usage

const options = { containScroll: true }
const embla = EmblaCarousel(emblaNode, options)

---

draggable

Allow drag interactions to scroll the carousel.

---

This option enables for scrolling the carousel with mouse and touch interactions. They're are enabled by default. Use this option to turn this feature off if you have good reasons to limit the accessibility of the carousel.

^{Type: boolean}

^{Allowed values: true false}

^{Default value: true}

  CodeSandbox

Usage

const options = { draggable: false }
const embla = EmblaCarousel(emblaNode, options)

---

dragFree

Enable momentum scrolling for drag interactions.

---

This option enables momentum scrolling, where the carousel continues to scroll for a while after finishing the scroll gesture by releasing the mouse/touch input. The speed and duration of the continued scrolling is proportional to how vigorous the scroll gesture was.

^{Type: boolean}

^{Allowed values: true false}

^{Default value: false}

  CodeSandbox

Usage

const options = { dragFree: true }
const embla = EmblaCarousel(emblaNode, options)

---

loop

Enable infinite looping for the carousel.

---

This option enables infinite looping. Slides need relative positioning in order for this to work. If the carousel only has one slide it will fall back to non looping behaviour. Note that containScroll will be ignored if loop is enabled because the empty space is already filled with looping slides.

^{Type: boolean}

^{Allowed values: true false}

^{Default value: false}

  CodeSandbox

Usage

const options = { loop: true }
const embla = EmblaCarousel(emblaNode, options)

.embla__slide {
  position: relative; /* Needed for loop to work */
}

---

speed

Set scroll speed triggered by API navigation.

---

This option enables adjustment of the scroll speed when triggered by any of the API methods scrollNext , scrollPrev and scrollTo . Use a higher number for faster scrolling. Drag interactions are not affected by this because the speed in these cases is determined by how vigorous the drag gesture was.

^{Type: number}

^{Allowed values: any}

^{Default value: 10}

  CodeSandbox

Usage

const options = { speed: 15 }
const embla = EmblaCarousel(emblaNode, options)

---

startIndex

Select index of the initial scroll snap.

---

This option allows the selection of the initial scroll snap position. First scroll snap index starts at 0. If slides are mapped to groups with the slidesToScroll option, some slides share the same scroll snap index. For example, if it's set to 2 slide one and two will be at index 0, while slide three and four will be at index 1 and so on.

^{Type: number}

^{Allowed values: any}

^{Default value: 0}

  CodeSandbox

Usage

const options = { startIndex: 3 }
const embla = EmblaCarousel(emblaNode, options)

---

selectedClass

Choose classname applied to the selected slides.

---

This option allows for a custom classname that will be applied to the selected slide. In most cases, only one slide will be selected at a time. However, when slidesToScroll is more than 1 and/or containScroll is active, slides are mapped to groups. This means that the selected class will be added to multiple slides at a time.

^{Type: string}

^{Allowed values: any}

^{Default value: is-selected}

  CodeSandbox

Usage

const options = { selectedClass: 'my-selected-class' }
const embla = EmblaCarousel(emblaNode, options)

---

draggableClass

Choose classname applied to the draggable container.

---

This option allows for a custom classname that will be applied to the carousel container if the carousel is draggable . Use it to style the carousel accordingly. For example, you can show a grab cursor when a draggable carousel is hovered. If no value is provided it will fall back to is-draggable.

^{Type: string}

^{Allowed values: any}

^{Default value: is-draggable}

  CodeSandbox

Usage

const options = { draggableClass: 'my-draggable-class' }
const embla = EmblaCarousel(emblaNode, options)

.my-draggable-class {
  cursor: grab;
}

---

draggingClass

Choose classname applied to the container when dragging.

---

This option allows for a custom classname that will be applied to the carousel container on mousedown or touchstart, if the carousel is draggable . Use it to style the carousel accordingly. For example, you can show a grabbing cursor when a pointer is down. If no value is provided it will fall back to is-dragging.

^{Type: string}

^{Allowed values: any}

^{Default value: is-dragging}

  CodeSandbox

Usage

const options = { draggingClass: 'my-dragging-class' }
const embla = EmblaCarousel(emblaNode, options)

.my-dragging-class {
  cursor: grabbing;
}

---

API

Embla exposes API methods that can be used to control the carousel externally. Example usage:

embla.scrollNext()
embla.scrollTo(2)
embla.changeOptions({ loop: true })
embla.on('select', () => {
  console.log(`Selected snap index is ${embla.selectedScrollSnap()}.`)
})

containerNode

Get the container node that holds the slides.

---

This API method returns the container node that holds the slides. If a custom selector is used by utilising the containerSelector option this will return the matching element, otherwise it will return the first immediate child of the Embla node passed to EmblaCarousel.

^{Parameters: none}

^{Return Type: Node.ELEMENT_NODE}

  CodeSandbox

Usage

const embla = EmblaCarousel(emblaNode, options)
const emblaContainer = embla.containerNode()

---

slideNodes

Get the slide nodes inside the container.

---

This API method returns an array with the slide nodes inside the carousel container. Use this handy method if you want to manipulate the slide nodes in some way. You can also grab the length of the array to get the slide count.

^{Parameters: none}

^{Return Type: Node.ELEMENT_NODE[]}

  CodeSandbox

Usage

const embla = EmblaCarousel(emblaNode, options)
const emblaSlides = embla.slideNodes()

---

scrollNext

Scroll to the next snap point if possible.

---

This API method scrolls to the next snap point if possible. If the loop option is disabled and the carousel is on the last snap point, this method will do nothing. When loop is enabled, it will always be able to scroll to the next snap point. Useful for creating a scroll next button for example.

^{Parameters: none}

^{Return Type: undefined}

  CodeSandbox

Usage

const embla = EmblaCarousel(emblaNode, options)
const nextButton = emblaNode.querySelector('.embla__next')

nextButton.addEventListener('click', embla.scrollNext, false)

<button class="embla__next" type="button">
  Scroll Next
</button>

---

scrollPrev

Scroll to the previous snap point if possible.

---

This API method scrolls to the previous snap point if possible. If the loop option is disabled and the carousel is on the first snap point, this method will do nothing. When loop is enabled, it will always be able to scroll to the previous snap point. Useful for creating a scroll previous button for example.

^{Parameters: none}

^{Return Type: undefined}

  CodeSandbox

Usage

const embla = EmblaCarousel(emblaNode, options)
const prevButton = emblaNode.querySelector('.embla__prev')

prevButton.addEventListener('click', embla.scrollPrev, false)

<button class="embla__prev" type="button">
  Scroll Previous
</button>

---

scrollTo

Scroll to a snap point by its unique index.

---

This API method scrolls to the snap point that matches the given index. When the loop option is enabled, the carousel will seek the closest way to the target. Useful for creating dot navigation together with the scrollSnapList method.

^{Parameters: index: number}

^{Return Type: undefined}

  CodeSandbox

Usage

const embla = EmblaCarousel(emblaNode, options)
const rewindButton = emblaNode.querySelector('.embla__rewind')

rewindButton.addEventListener('click', () => embla.scrollTo(0), false)

<button class="embla__rewind" type="button">
  Rewind
</button>

---

scrollToProgress

Scroll the carousel by to given location.

---

This API method allows users to manipulate the current scrollProgress from 0 to 1 by directly setting it. For example, assuming that the carousel is positioned on the first snap point, 0.5 will scroll the carousel half of its scrollable length. Scroll to target is smooth. The second parameter allows for snapping the carousel to the closest snap point based on the target scroll progress (note that this will alter the desired progress a bit in order to snap it).

^{Parameters: progress: number snap: boolean}

^{Return Type: undefined}

  CodeSandbox (to be created)

Usage

const embla = EmblaCarousel(emblaNode, options)
embla.scrollToProgress(0.5)

---

scrollBy

Scroll the carousel by the given amount.

---

This API method allows users to manipulate the current scrollProgress from 0 to 1 by either adding to it or subtracting from it. For example, assuming that the carousel is positioned on the first snap point, 0.5 will scroll the carousel half of its scrollable length. Scroll to target is smooth. The second parameter allows for snapping the carousel to the closest snap point based on the target scroll progress (note that this will alter the desired progress a bit in order to snap it).

^{Parameters: progress: number snap: boolean}

^{Return Type: undefined}

  CodeSandbox

Usage

const embla = EmblaCarousel(emblaNode, options)
embla.scrollBy(0.5)

---

canScrollPrev

Check the possiblity to scroll to a previous snap point.

---

This API method returns a boolean that indicates if the carousel can scroll to a previous snap point from its current position. Note that if the loop option is enabled it will always return true. For example, it can be used to disable or enable a scroll to previous button.

^{Parameters: none}

^{Return Type: boolean}

  CodeSandbox

Usage

const embla = EmblaCarousel(emblaNode, options)
const prevButton = emblaNode.querySelector('.embla__prev')

const togglePrevButtonEnabled = () => {
  if (embla.canScrollPrev()) {
    prevButton.removeAttribute('disabled')
  } else {
    prevButton.setAttribute('disabled', 'disabled')
  }
}

embla.on('init', togglePrevButtonEnabled)
embla.on('select', togglePrevButtonEnabled)

<button class="embla__prev" type="button">
  Scroll Previous
</button>

---

canScrollNext

Check the possiblity to scroll to a next snap point.

---

This API method returns a boolean that indicates if the carousel can scroll to a next snap point from its current position. Note that if the loop option is enabled it will always return true. For example, it can be used to disable or enable a scroll to next button.

^{Parameters: none}

^{Return Type: boolean}

  CodeSandbox

Usage

const embla = EmblaCarousel(emblaNode, options)
const nextButton = emblaNode.querySelector('.embla__next')

const toggleNextButtonEnabled = () => {
  if (embla.canScrollNext()) {
    nextButton.removeAttribute('disabled')
  } else {
    nextButton.setAttribute('disabled', 'disabled')
  }
}

embla.on('init', toggleNextButtonEnabled)
embla.on('select', toggleNextButtonEnabled)

<button class="embla__next" type="button">
  Scroll Next
</button>

---

selectedScrollSnap

Get the index of the selected snap point.

---

This API method returns the index of the current selected snap point. If the slidesToScroll option is more than 1 some slides will be grouped together and share the same index. For example, when it's set to 2, every two slides will share the same index. In this case, slide 1 and 2 will share index 0 and slide 3 and 4 will share index 1 and so on.

^{Parameters: none}

^{Return Type: number}

  CodeSandbox

Usage

const embla = EmblaCarousel(emblaNode, options)

embla.on('select', () => {
  const currentSnapIndex = embla.selectedScrollSnap()
  alert(`Selected index has changed to ${currentSnapIndex}.`)
})

---

previousScrollSnap

Get the index of the previous snap point.

---

This API method returns the index of the previously selected snap point. If the slidesToScroll option is more than 1 some slides will be grouped together and share the same index. For example, when it's set to 2, every two slides will share the same index. In this case, slide 1 and 2 will share index 0 and slide 3 and 4 will share index 1 and so on.

^{Parameters: none}

^{Return Type: number}

  CodeSandbox

Usage

const embla = EmblaCarousel(emblaNode, options)

embla.on('select', () => {
  const previousSnapIndex = embla.previousScrollSnap()
  alert(`Previously selected index was ${previousSnapIndex}.`)
})

---

scrollSnapList

Get an array of all scroll snap points.

---

This API method returns an array containing all the carousel snap points. Each snap point comes with its slideNodes and slideIndexes. For example, it's useful for getting the snap point count or creating a dot navigation together with the scrollTo method.

^{Parameters: none}

^{Return Type: scrollSnap[]}

  CodeSandbox

Usage

const embla = EmblaCarousel(emblaNode, options)
const scrollSnaps = embla.scrollSnapList()

const slidesInFirstScrollSnap = scrollSnaps[0].slideNodes
const indexesInFirstScrollSnap = scrollSnaps[0].slideIndexes

---

scrollProgress

Check how far the carousel has scrolled.

---

This API method returns how far the carousel has scrolled from 0 at the beginning to 1 at the end. For example, it's useful for creating a progress bar together with the scroll event. When invoking scrollProgress without the target parameter, the carousel returns the scroll progress of its current location. However, if you want to grab the target scroll progress the target parameter has to be true.

^{Parameters: target: boolean}

^{Return Type: number}

  CodeSandbox

Usage

const embla = EmblaCarousel(emblaNode, options)

embla.on('scroll', () => {
  const scrollPercentage = embla.scrollProgress() * 100
  console.log(`The carousel has scrolled ${scrollPercentage}%.`)
})

---

clickAllowed

Check if interaction was a static click.

---

This API method returns if the user interaction was a click. For mouse events Embla will return true if a drag interaction in any direction didn't occur before the mouse was released. Touch events also require the carousel to not be in a scrolling state in order to accept the click.

^{Parameters: none}

^{Return Type: boolean}

  CodeSandbox

Usage

const embla = EmblaCarousel(emblaNode, options)
const emblaSlides = embla.slideNodes()

const alertClickedSlide = index => {
  return () => {
    if (embla.clickAllowed()) {
      alert(`Slide with index ${index} was clicked.`)
    }
  }
}

emblaSlides.forEach((slide, index) => {
  const alertClickedSlideIndex = alertClickedSlide(index)
  slide.addEventListener('click', alertClickedSlideIndex, false)
})

---

changeOptions

Change the carousel options after initialization.

---

This API method allows for changing the carousel options after it has been initialized. Useful for changing the carousel setup depending on different screen sizes. Note that this will stop the carousel if it's in motion when change options is called, and initialize the carousel from scratch.

^{Parameters: options: EmblaOptions}

^{Return Type: undefined}

  CodeSandbox

Usage

const embla = EmblaCarousel(emblaNode, options)
embla.changeOptions({ loop: true })

---

destroy

Destroy a carousel instance permanently.

---

This API method is a one way operation and destroys a carousel instance. All applied styles to DOM nodes and any event listeners will be removed. Remember to remove any external event listeners if you've used the API to create prev/next and/or dot navigation for the carousel.

^{Parameters: none}

^{Return Type: undefined}

  CodeSandbox

Usage

const embla = EmblaCarousel(emblaNode, options)
embla.destroy()

---

on

Subscribe to an Embla specific event with a callback.

---

This API method enables the use of event listeners by attaching them to any of the Embla specific events . For example, it's useful for changing styles whenever a new target snap point has been selected or when the carousel is scrolling. Use it together with the off method to remove added event listeners without destroying the carousel. However, when the destroy method is invoked, any added event listeners will be destroyed.

^{Parameters: event: EmblaEvent callback: function}

^{Return Type: undefined}

  CodeSandbox

Usage

const embla = EmblaCarousel(emblaNode, options)

const onInitCallback = () => {
  console.log('The carousel is ready to rock.')
}

embla.on('init', onInitCallback)

---

off

Unsubscribe from an Embla specific event.

---

This API method enables the removal of event listeners attached to Embla specific events . It's useful for removing added event listeners without destroying the carousel. Note that you don't have to remove event listeners added using the on method when invoking destroy , because it will destroy all added event listeners for you.

^{Parameters: event: EmblaEvent callback: function}

^{Return Type: undefined}

  CodeSandbox

Usage

const embla = EmblaCarousel(emblaNode, options)

const logIndex = () => {
  const selectedIndex = embla.selectedScrollSnap()
  console.log(`Selected index has changed to ${selectedIndex}.`)
}

const addLogIndexListener = () => embla.on('select', logIndex)
const removeLogIndexListener = () => embla.off('select', logIndex)

---

Events

Embla exposes custom events that can be hooked on to. Example usage:

embla.on('select', () => {
  console.log(`Selected snap index is ${embla.selectedScrollSnap()}.`)
})
embla.on('scroll', () => {
  console.log(`Scroll progress is ${embla.scrollProgress()}.`)
})

init

Fire a callback when the carousel mounts.

---

This event fires the given callback when the carousel has initialised and its API is ready to use. Note that the init event only fires once upon the first initialisation and won't trigger when invoking changeOptions or similar.

  CodeSandbox

Usage

const embla = EmblaCarousel(emblaNode, options)

const onInitCallback = () => {
  console.log('The carousel is ready to rock.')
})

embla.on('init', onInitCallback)

---

destroy

Fire a callback when the carousel is destroyed.

---

Under construction...

  CodeSandbox (upcoming)

Usage

const embla = EmblaCarousel(emblaNode, options)

---

select

Fire a callback when selected scroll snap changes.

---

Under construction...

  CodeSandbox

Usage

const embla = EmblaCarousel(emblaNode, options)

---

scroll

Fire a callback when the carousel is scrolling.

---

Under construction...

  CodeSandbox

Usage

const embla = EmblaCarousel(emblaNode, options)

embla.on('scroll', () => {
  const scrollPercentage = embla.scrollProgress() * 100
  console.log(`The carousel has scrolled ${scrollPercentage}%.`)
})

---

settle

Fire a callback when the carousel has settled.

---

Under construction...

  CodeSandbox (upcoming)

Usage

const embla = EmblaCarousel(emblaNode, options)

embla.on('settle', () => {
  console.log(`The carousel has stopped scrolling.`)
})

---

resize

Fire a callback when the carousel has resized.

---

Under construction...

  CodeSandbox

Usage

const embla = EmblaCarousel(emblaNode, options)

---

dragStart

Under construction...

---

Under construction...

  CodeSandbox

Usage

const embla = EmblaCarousel(emblaNode, options)

---

dragEnd

Under construction...

---

Under construction...

  CodeSandbox

Usage

const embla = EmblaCarousel(emblaNode, options)

---

CodeSandbox

Get started instantly with one of the CodeSandboxes below.

  Basic Setup - With Previous, Next & Dot buttons.

  Autoplay - Example of how to setup Autoplay.

Browser Support

Embla has been tested in the browsers listed below. Special thanks goes to BrowserStack.

  IE - 11

  Edge - Latest 2 versions

  Chrome - Latest 2 versions

  Firefox - Latest 2 versions

  Safari - Latest 2 versions

Contributors

Thank you to all contributors for making Embla Carousel awesome! Contributions are welcome.

Open Source

^{Copyright © 2019-present, David Cetinkaya.}
Embla is MIT licensed 💖

· · ·