Powerful, extensible, and feature-packed frontend toolkit. Build and customize with Sass, utilize prebuilt grid system and components, and bring projects to life with powerful JavaScript plugins.
Jump right into building with Bootstrap—use the CDN, install it via package manager, or download the source code.
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 our npm template repo to quickly generate a Bootstrap project via npm.
npm install [email protected]gem install bootstrap -v 5.2.1Read our installation docs for more info and additional package managers.
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 .
<!-- CSS only -->
<link href="https://cdn.jsdelivr.net/npm/[email protected]/dist/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-iYQeCzEYFbKjA/T2uDLTpkwGzCiq6soy8tYaI1GyVh/UjpbCx/TYkiZhlZB6+fzT" crossorigin="anonymous">
<!-- JavaScript Bundle with Popper -->
<script src="https://cdn.jsdelivr.net/npm/[email protected]/dist/js/bootstrap.bundle.min.js" integrity="sha384-u1OknCvxWvY5kfmNBILK2hRnQC3Pr17a+RTT6rIHI7NnikvbZlHgTPOOmMi466C8" crossorigin="anonymous"></script>
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.
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 .
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/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 .
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 :rootlevel for use anywhere. On components and utilities, CSS variables are scoped to the relevant class and can easily be modified.
Use any of our global :rootvariables 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);
}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;
}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.
// Create and extend utilities with the Utility API
@import "bootstrap/scss/bootstrap";
$utilities: map-merge(
$utilities,
(
"cursor": (
property: cursor,
class: cursor,
responsive: true,
values: auto pointer grab,
)
)
);
Easily add toggleable hidden elements, modals and offcanvas menus, popovers and tooltips, and so much more—all without jQuery. JavaScript in Bootstrap is HTML-first, which means adding plugins is as easy as adding dataattributes. Need more control? Include individual plugins programmatically.
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 dataattributes.
<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><a class="dropdown-item" href="#">Dropdown item</a></li>
<li><a class="dropdown-item" href="#">Dropdown item</a></li>
<li><a class="dropdown-item" href="#">Dropdown item</a></li>
</ul>
</div>
Learn more about our JavaScript as modules and using the programmatic API .
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.
Bootstrap Icons is an open source SVG icon library featuring over 1,500 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.
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.
