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Table of contents

Quick start

Several quick start options are available:

  • Download the latest release.
  • Clone the repo: git clone
  • Install with npm: npm install bootstrap
  • Install with yarn: yarn add bootstrap@4.6.2
  • Install with Composer: composer require twbs/bootstrap:4.6.2
  • Install with NuGet: CSS: Install-Package bootstrap Sass: Install-Package bootstrap.sass

Read the Getting started page for information on the framework contents, templates and examples, and more.


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What's included

Within the download you'll find the following directories and files, logically grouping common assets and providing both compiled and minified variations.

Download contents
└── dist/
    ├── css/
    │   ├── bootstrap-grid.css
    │   ├──
    │   ├── bootstrap-grid.min.css
    │   ├──
    │   ├── bootstrap-reboot.css
    │   ├──
    │   ├── bootstrap-reboot.min.css
    │   ├──
    │   ├── bootstrap.css
    │   ├──
    │   ├── bootstrap.min.css
    │   └──
    └── js/
        ├── bootstrap.bundle.js
        ├── bootstrap.bundle.min.js
        ├── bootstrap.js
        ├── bootstrap.min.js

We provide compiled CSS and JS (bootstrap.*), as well as compiled and minified CSS and JS (bootstrap.min.*). Source maps (bootstrap.*.map) are available for use with certain browsers' developer tools. Bundled JS files (bootstrap.bundle.js and minified bootstrap.bundle.min.js) include Popper, but not jQuery.

Bugs and feature requests

Have a bug or a feature request? Please first read the issue guidelines and search for existing and closed issues. If your problem or idea is not addressed yet, please open a new issue.


Bootstrap's documentation, included in this repo in the root directory, is built with Hugo and publicly hosted on GitHub Pages at The docs may also be run locally.

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Running documentation locally

  1. Run npm install to install the Node.js dependencies, including Hugo (the site builder).
  2. Run npm run test (or a specific npm script) to rebuild distributed CSS and JavaScript files, as well as our docs assets.
  3. Run npm start to compile CSS and JavaScript files, generate our docs, and watch for changes.
  4. Open http://localhost:9001/ in your browser, and voilà.

Learn more about using Hugo by reading its documentation.

Documentation for previous releases

You can find all our previous releases docs on

Previous releases and their documentation are also available for download.


Please read through our contributing guidelines. Included are directions for opening issues, coding standards, and notes on development.

Moreover, if your pull request contains JavaScript patches or features, you must include relevant unit tests. All HTML and CSS should conform to the Code Guide, maintained by Mark Otto.

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Get updates on Bootstrap's development and chat with the project maintainers and community members.

  • Follow @getbootstrap on Twitter.
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  • Implementation help may be found at Stack Overflow (tagged bootstrap-4).
  • Developers should use the keyword bootstrap on packages which modify or add to the functionality of Bootstrap when distributing through npm or similar delivery mechanisms for maximum discoverability.


For transparency into our release cycle and in striving to maintain backward compatibility, Bootstrap is maintained under the Semantic Versioning guidelines. Sometimes we screw up, but we adhere to those rules whenever possible.

See the Releases section of our GitHub project for changelogs for each release version of Bootstrap. Release announcement posts on the official Bootstrap blog contain summaries of the most noteworthy changes made in each release.


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