Bootstrap · The most popular HTML, CSS, and JS library in the world.

Get started any way you want

Jump right into building with Bootstrap—use the CDN, install it via package manager, or download the source code. Read installation docs

Install via package manager

Install Bootstrap’s source Sass and JavaScript files via npm, RubyGems, Composer, or Meteor. Package-managed installs don’t include documentation or our full build scripts. You can also use any demo from our Examples repo to quickly jumpstart Bootstrap projects.

npm install bootstrap@5.3.6

gem install bootstrap -v 5.3.6

Read our installation docs for more info and additional package managers.

Include via CDN

When you only need to include Bootstrap’s compiled CSS or JS, you can use jsDelivr . See it in action with our simple quick start , or browse the examples to jumpstart your next project. You can also choose to include Popper and our JS separately .

<link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.6/dist/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-4Q6Gf2aSP4eDXB8Miphtr37CMZZQ5oXLH2yaXMJ2w8e2ZtHTl7GptT4jmndRuHDT" crossorigin="anonymous">

<script src="https://cdn.jsdelivr.net/npm/bootstrap@5.3.6/dist/js/bootstrap.bundle.min.js" integrity="sha384-j1CDi7MgGQ12Z7Qab0qlWQ/Qqz24Gc6BM0thvEMVjHnfYGF0rmFCozFSxQBxwHKO" crossorigin="anonymous"></script>

Read our getting started guides

Get a jump on including Bootstrap's source files in a new project with our official guides.

Webpack

Parcel

Vite

Customize everything with Sass

Bootstrap utilizes Sass for a modular and customizable architecture. Import only the components you need, enable global options like gradients and shadows, and write your own CSS with our variables, maps, functions, and mixins. Learn more about customizing

Include all of Bootstrap’s Sass

Import one stylesheet and you're off to the races with every feature of our CSS.

// Variable overrides first
$primary: #900;
$enable-shadows: true;
$prefix: "mo-";
// Then import Bootstrap
@import "../node_modules/bootstrap/scss/bootstrap";

Learn more about our global Sass options .

Include what you need

The easiest way to customize Bootstrap—include only the CSS you need.

// Functions first
@import "../node_modules/bootstrap/scss/functions";
// Variable overrides second
$primary: #900;
$enable-shadows: true;
$prefix: "mo-";
// Required Bootstrap imports
@import "../node_modules/bootstrap/scss/variables";
@import "../node_modules/bootstrap/scss/variables-dark";
@import "../node_modules/bootstrap/scss/maps";
@import "../node_modules/bootstrap/scss/mixins";
@import "../node_modules/bootstrap/scss/root";
// Optional components
@import "../node_modules/bootstrap/scss/utilities";
@import "../node_modules/bootstrap/scss/reboot";
@import "../node_modules/bootstrap/scss/containers";
@import "../node_modules/bootstrap/scss/grid";
@import "../node_modules/bootstrap/scss/helpers";
@import "../node_modules/bootstrap/scss/utilities/api";

Learn more about using Bootstrap with Sass .

Build and extend in real-time with CSS variables

Bootstrap 5 is evolving with each release to better utilize CSS variables for global theme styles, individual components, and even utilities. We provide dozens of variables for colors, font styles, and more at a :root level for use anywhere. On components and utilities, CSS variables are scoped to the relevant class and can easily be modified. Learn more about CSS variables

Using CSS variables

Use any of our global :root variables to write new styles. CSS variables use the var(--bs-variableName) syntax and can be inherited by children elements.

.component {
  color: var(--bs-gray-800);
  background-color: var(--bs-gray-100);
  border: 1px solid var(--bs-gray-200);
  border-radius: .25rem;
.component-header {
  color: var(--bs-purple);
}

Customizing via CSS variables

Override global, component, or utility class variables to customize Bootstrap just how you like. No need to redeclare each rule, just a new variable value.

body {
  --bs-body-font-family: var(--bs-font-monospace);
  --bs-body-line-height: 1.4;
  --bs-body-bg: var(--bs-gray-100);
.table {
  --bs-table-color: var(--bs-gray-600);
  --bs-table-bg: var(--bs-gray-100);
  --bs-table-border-color: transparent;
}

Components, meet the Utility API

New in Bootstrap 5, our utilities are now generated by our Utility API . We built it as a feature-packed Sass map that can be quickly and easily customized. It's never been easier to add, remove, or modify any utility classes. Make utilities responsive, add pseudo-class variants, and give them custom names.

Quickly customize components

Apply any of our included utility classes to our components to customize their appearance, like the navigation example below. There are hundreds of classes available—from positioning and sizing to colors and effects . Mix them with CSS variable overrides for even more control.

<ul class="nav nav-pills nav-fill gap-2 p-1 small bg-primary rounded-5 shadow-sm" id="pillNav2" role="tablist" style="--bs-nav-link-color: var(--bs-white); --bs-nav-pills-link-active-color: var(--bs-primary); --bs-nav-pills-link-active-bg: var(--bs-white);">
  <li class="nav-item" role="presentation">
    <button class="nav-link active rounded-5" id="home-tab2" data-bs-toggle="tab" type="button" role="tab" aria-selected="true">Home</button>
  <li class="nav-item" role="presentation">
    <button class="nav-link rounded-5" id="profile-tab2" data-bs-toggle="




    
tab" type="button" role="tab" aria-selected="false">Profile</button>
  <li class="nav-item" role="presentation">
    <button class="nav-link rounded-5" id="contact-tab2" data-bs-toggle="tab" type="button" role="tab" aria-selected="false">Contact</button>
Explore customized components


          
           
            Create and extend utilities
           
           
            Use Bootstrap's utility API to modify any of our included utilities or create your own custom utilities for any
        project. Import Bootstrap first, then use Sass map functions to modify, add, or remove utilities.
           
           
            
             
            
            
             @import "bootstrap/scss/bootstrap";
$utilities: map-merge(
  $utilities,
    "cursor": (
      property: cursor,
      class: cursor,
      responsive: true,
      values: auto pointer grab,
Explore the utility API


      
       
        
         
          
         
         
          Powerful JavaScript plugins without jQuery
         
         
          Add toggleable hidden elements, modals and offcanvas menus, popovers and tooltips, and so much more—all without
      jQuery. Bootstrap's JavaScript is HTML-first, meaning most plugins are added with
          
           data
          
          attributes in your
      HTML. Need more control? Include individual plugins programmatically.
Learn more about Bootstrap JavaScript
          
         
        
        
         
          
           Data attribute API
          
          
           Why write more JavaScript when you can write HTML? Nearly all of Bootstrap's JavaScript plugins feature a
        first-class data API, allowing you to use JavaScript just by adding
           
            data
           
           attributes.
Dropdown
          
          
           
            
           
           
            
           
           
            
           
          
         
        
        
         
          
         
         
          <div class="dropdown">
  <button class="btn btn-primary dropdown-toggle" type="button" data-bs-toggle="dropdown" aria-expanded="false">
    Dropdown
  </button>
  <ul class="dropdown-menu">
    <li><button class="dropdown-item" type="button">Dropdown item</button></li>
    <li><button class="dropdown-item" type="button">Dropdown item</button></li>
    <li><button class="dropdown-item" type="button">Dropdown item</button></li>
</div>
         
        
        
         Learn more about
         
          our JavaScript as modules
         
         and
         
          using the programmatic API
         
         .


     
      
       
        Comprehensive set of plugins
       
       
        Bootstrap features a dozen plugins that you can drop into any project. Drop them in all at once, or choose just
        the ones you need.
       
       
       
        
         
          
           Alert
          
          
           Show and hide alert messages to your users.
          
         
        
        
         
          
           Button
          
          
           Programmatically control the active state for buttons.
          
         
        
        
         
          
           Carousel
          
          
           Add slideshows to any page, including support for crossfade.
          
         
        
        
         
          
           Collapse
          
          
           Expand and collapse areas of content, or create accordions.
          
         
        
        
         
          
           Dropdown
          
          
           Create menus of links, actions, forms, and more.
          
         
        
        
         
          
           Modal
          
          
           Add flexible and responsive dialogs to your project.
          
         
        
        
         
          
           Offcanvas
          
          
           Build and toggle hidden sidebars into any page.
          
         
        
        
         
          
           Popover
          
          
           Create custom overlays. Built on Popper.
          
         
        
        
         
          
           Scrollspy
          
          
           Automatically update active nav links based on page scroll.
          
         
        
        
         
          
           Tab
          
          
           Allow Bootstrap nav components to toggle contents.
          
         
        
        
         
          
           Toast
          
          
           Show and hide notifications to your visitors.
          
         
        
        
         
          
           Tooltip
          
          
           Replace browser tooltips with custom ones. Built on Popper.
          
         
        
       
      
      
       
        
         
        
        
         Personalize it with Bootstrap Icons
        
        
         
          Bootstrap Icons
         
         is an open source SVG icon library featuring over 1,800 glyphs, with
      more added every release. They're designed to work in any project, whether you use Bootstrap itself or not. Use them
      as SVGs or icon fonts—both options give you vector scaling and easy customization via CSS.
Get Bootstrap Icons
         
        
       
       
        
       
      
      
       
        
         
        
        
         Make it yours with official Bootstrap Themes
        
        
         Take Bootstrap to the next level with premium themes from the
         
          official Bootstrap Themes marketplace
         
         . Themes are built on Bootstrap as their own extended frameworks, rich with new components and plugins,
      documentation, and powerful build tools.

v5 releases

Previous releases

Build fast, responsive sites with Bootstrap