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.
When you only need to include Bootstrap’s compiled CSS or JS, you can use BootCDN. 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.
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";
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.
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.
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.
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.
<ulclass="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);"><liclass="nav-item"role="presentation"><buttonclass="nav-link active rounded-5"id="home-tab2"data-bs-toggle="tab"type="button"role="tab"aria-selected="true">Home</button></li><liclass="nav-item"role="presentation"><buttonclass="nav-link rounded-5"id="profile-tab2"data-bs-toggle="tab"type="button"role="tab"aria-selected="false">Profile</button></li><liclass="nav-item"role="presentation"><buttonclass="nav-link rounded-5"id="contact-tab2"data-bs-toggle="tab"type="button"role="tab"aria-selected="false">Contact</button></li></ul>
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.
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.
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.
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.
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.
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