JavaScript

Individual or compiled

Plugins can be included individually (using Bootstrap’s individual js/dist/*.js), or all at once using bootstrap.js or the minified bootstrap.min.js (don’t include both).

If you use a bundler (Webpack, Rollup…), you can use /js/dist/*.js files which are UMD ready.

Usage with JavaScript frameworks

While the Bootstrap CSS can be used with any framework, the Bootstrap JavaScript is not fully compatible with JavaScript frameworks like React, Vue, and Angular which assume full knowledge of the DOM. Both Bootstrap and the framework may attempt to mutate the same DOM element, resulting in bugs like dropdowns that are stuck in the “open” position.

A better alternative for those using this type of frameworks is to use a framework-specific package instead of the Bootstrap JavaScript. Here are some of the most popular options:

• React: React Bootstrap
• Vue: BootstrapVue
• Angular: ng-bootstrap

Using Bootstrap as a module

We provide a version of Bootstrap built as ESM (bootstrap.esm.js and bootstrap.esm.min.js) which allows you to use Bootstrap as a module in your browser, if your targeted browsers support it.

<script type="module">
  import { Toast } from 'bootstrap.esm.min.js'

  Array.from(document.querySelectorAll('.toast'))
    .forEach(toastNode => new Toast(toastNode))
</script>

Dependencies

Some plugins and CSS components depend on other plugins. If you include plugins individually, make sure to check for these dependencies in the docs.

Our dropdowns, popovers and tooltips also depend on Popper.

Still want to use jQuery? It’s possible!

Bootstrap 5 is designed to be used without jQuery, but it’s still possible to use our components with jQuery. If Bootstrap detects jQuery in the window object it’ll add all of our components in jQuery’s plugin system; this means you’ll be able to do $('[data-bs-toggle="tooltip"]').tooltip() to enable tooltips. The same goes for our other components.

Data attributes

Nearly all Bootstrap plugins can be enabled and configured through HTML alone with data attributes (our preferred way of using JavaScript functionality). Be sure to only use one set of data attributes on a single element (e.g., you cannot trigger a tooltip and modal from the same button.)

Events

Bootstrap provides custom events for most plugins’ unique actions. Generally, these come in an infinitive and past participle form - where the infinitive (ex. show) is triggered at the start of an event, and its past participle form (ex. shown) is triggered on the completion of an action.

All infinitive events provide preventDefault() functionality. This provides the ability to stop the execution of an action before it starts. Returning false from an event handler will also automatically call preventDefault().

const myModal = document.getElementById('myModal')

myModal.addEventListener('show.bs.modal', event => {
  if (!data) {
    return event.preventDefault() // stops modal from being shown
  }
})

$('#myTab a').on('shown.bs.tab', () => {
  // do something...
})

Programmatic API

All constructors accept an optional options object or nothing (which initiates a plugin with its default behavior):

const myModalEl = document.getElementById('myModal')

const modal = new bootstrap.Modal(myModalEl) // initialized with defaults
const modal1 = new bootstrap.Modal(myModalEl, { keyboard: false }) // initialized with no keyboard

If you’d like to get a particular plugin instance, each plugin exposes a getInstance method. In order to retrieve it directly from an element, do this: bootstrap.Popover.getInstance(myPopoverEl).

CSS selectors in constructors

You can also use a CSS selector as the first argument instead of a DOM element to initialize the plugin. Currently the element for the plugin is found by the querySelector method since our plugins support a single element only.

const modal = new bootstrap.Modal('#myModal')
const dropdown = new bootstrap.Dropdown('[data-bs-toggle="dropdown"]')

Asynchronous functions and transitions

All programmatic API methods are asynchronous and return to the caller once the transition is started but before it ends.

In order to execute an action once the transition is complete, you can listen to the corresponding event.

const myCollapseEl = document.getElementById('myCollapse')

myCollapseEl.addEventListener('shown.bs.collapse', event => {
  // Action to execute once the collapsible area is expanded
})

In addition a method call on a transitioning component will be ignored.

const myCarouselEl = document.getElementById('myCarousel')
const carousel = bootstrap.Carousel.getInstance(myCarouselEl) // Retrieve a Carousel instance

myCarouselEl.addEventListener('slid.bs.carousel', event => {
  carousel.to('2') // Will slide to the slide 2 as soon as the transition to slide 1 is finished
})

carousel.to('1') // Will start sliding to the slide 1 and returns to the caller
carousel.to('2') // !! Will be ignored, as the transition to the slide 1 is not finished !!

Default settings

You can change the default settings for a plugin by modifying the plugin’s Constructor.Default object:

// changes default for the modal plugin's `keyboard` option to false
bootstrap.Modal.Default.keyboard = false

No conflict (only if you use jQuery)

Sometimes it is necessary to use Bootstrap plugins with other UI frameworks. In these circumstances, namespace collisions can occasionally occur. If this happens, you may call .noConflict on the plugin you wish to revert the value of.

const bootstrapButton = $.fn.button.noConflict() // return $.fn.button to previously assigned value
$.fn.bootstrapBtn = bootstrapButton // give $().bootstrapBtn the Bootstrap functionality

Version numbers

The version of each of Bootstrap’s plugins can be accessed via the VERSION property of the plugin’s constructor. For example, for the tooltip plugin:

bootstrap.Tooltip.VERSION // => "5.2.0-beta1"

No special fallbacks when JavaScript is disabled

Bootstrap’s plugins don’t fall back particularly gracefully when JavaScript is disabled. If you care about the user experience in this case, use <noscript> to explain the situation (and how to re-enable JavaScript) to your users, and/or add your own custom fallbacks.

Sanitizer

Tooltips and Popovers use our built-in sanitizer to sanitize options which accept HTML.

The default allowList value is the following:

const ARIA_ATTRIBUTE_PATTERN = /^aria-[\w-]*$/i
const DefaultAllowlist = {
  // Global attributes allowed on any supplied element below.
  '*': ['class', 'dir', 'id', 'lang', 'role', ARIA_ATTRIBUTE_PATTERN],
  a: ['target', 'href', 'title', 'rel'],
  area: [],
  b: [],
  br: [],
  col: [],
  code: [],
  div: [],
  em: [],
  hr: [],
  h1: [],
  h2: [],
  h3: [],
  h4: [],
  h5: [],
  h6: [],
  i: [],
  img: ['src', 'srcset', 'alt', 'title', 'width', 'height'],
  li: [],
  ol: [],
  p: [],
  pre: [],
  s: [],
  small: [],
  span: [],
  sub: [],
  sup: [],
  strong: [],
  u: [],
  ul: []
}

If you want to add new values to this default allowList you can do the following:

const myDefaultAllowList = bootstrap.Tooltip.Default.allowList

// To allow table elements
myDefaultAllowList.table = []

// To allow td elements and data-bs-option attributes on td elements
myDefaultAllowList.td = ['data-bs-option']

// You can push your custom regex to validate your attributes.
// Be careful about your regular expressions being too lax
const myCustomRegex = /^data-my-app-[\w-]+/
myDefaultAllowList['*'].push(myCustomRegex)

If you want to bypass our sanitizer because you prefer to use a dedicated library, for example DOMPurify, you should do the following:

const yourTooltipEl = document.getElementById('yourTooltip')
const tooltip = new bootstrap.Tooltip(yourTooltipEl, {
  sanitizeFn(content) {
    return DOMPurify.sanitize(content)
  }
})