Bootstrap is a sleek, intuitive, and powerful front-end framework for faster and easier web development, created by Mark Otto and Jacob Thornton, and maintained by the core team with the massive support and involvement of the community.

To get started, check out https://getbootstrap.com!

• Quick start
• Bugs and feature requests
• Documentation
• Compiling CSS and JavaScript
• Contributing
• Community
• Versioning
• Authors
• Copyright and license

Three quick start options are available:

• Download the latest release.
• Clone the repo: git clone https://github.com/twbs/bootstrap.git.
• Install with Bower: bower install bootstrap.

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

Within the download you'll find the following directories and files, logically grouping common assets and providing both compiled and minified variations. You'll see something like this:

bootstrap/
├── css/
│   ├── bootstrap.css
│   ├── bootstrap.min.css
│   ├── bootstrap-theme.css
│   └── bootstrap-theme.min.css
├── js/
│   ├── bootstrap.js
│   └── bootstrap.min.js
└── fonts/
    ├── glyphicons-halflings-regular.eot
    ├── glyphicons-halflings-regular.svg
    ├── glyphicons-halflings-regular.ttf
    └── glyphicons-halflings-regular.woff

We provide compiled CSS and JS (bootstrap.*), as well as compiled and minified CSS and JS (bootstrap.min.*). Fonts from Glyphicons are included, as is the optional Bootstrap theme.

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 Jekyll and publicly hosted on GitHub Pages at https://getbootstrap.com. The docs may also be run locally.

1. If necessary, install Jekyll (requires v1.x).

• Windows users: Read this unofficial guide to get Jekyll up and running without problems. We use Pygments for syntax highlighting, so make sure to read the sections on installing Python and Pygments.

2. From the root /bootstrap directory, run jekyll serve in the command line.

• Windows users: While we use Jekyll's encoding setting, you might still need to change the command prompt's character encoding (code page) to UTF-8 so Jekyll runs without errors. For Ruby 2.0.0, run chcp 65001 first. For Ruby 1.9.3, you can alternatively do SET LANG=en_EN.UTF-8.

3. Open https://localhost:9001 in your browser, and voilà.

Learn more about using Jekyll by reading its documentation.

Documentation for v2.3.2 has been made available for the time being at https://getbootstrap.com/2.3.2/ while folks transition to Bootstrap 3.

Previous releases and their documentation are also available for download.

Bootstrap uses Grunt with convenient methods for working with the framework. It's how we compile our code, run tests, and more. To use it, install the required dependencies as directed and then run some Grunt commands.

From the command line:

1. Install grunt-cli globally with npm install -g grunt-cli.
2. Navigate to the root /bootstrap directory, then run npm install. npm will look at package.json and automatically install the necessary local dependencies listed there.

When completed, you'll be able to run the various Grunt commands provided from the command line.

Unfamiliar with npm? Don't have node installed? That's a-okay. npm stands for node packaged modules and is a way to manage development dependencies through node.js. Download and install node.js before proceeding.

Run grunt to run tests locally and compile the CSS and JavaScript into /dist. Uses Less and UglifyJS.

grunt dist creates the /dist directory with compiled files. Uses Less and UglifyJS.

Runs JSHint and QUnit tests headlessly in PhantomJS (used for CI).

This is a convenience method for watching just Less files and automatically building them whenever you save.

Should you encounter problems with installing dependencies or running Grunt commands, uninstall all previous dependency versions (global and local). Then, rerun npm install.

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.

Editor preferences are available in the editor config for easy use in common text editors. Read more and download plugins at https://editorconfig.org.

Keep track of development and community news.

• Follow @twbootstrap on Twitter.
• Read and subscribe to The Official Bootstrap Blog.
• Chat with fellow Bootstrappers in IRC. On the irc.freenode.net server, in the ##twitter-bootstrap channel.
• Implementation help may be found at Stack Overflow (tagged twitter-bootstrap-3).

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'll adhere to these rules whenever possible.

Releases will be numbered with the following format:

<major>.<minor>.<patch>

And constructed with the following guidelines:

• Breaking backward compatibility bumps the major while resetting minor and patch
• New additions without breaking backward compatibility bumps the minor while resetting the patch
• Bug fixes and misc changes bumps only the patch

For more information on SemVer, please visit https://semver.org/.

Mark Otto

• https://twitter.com/mdo
• https://github.com/mdo

Jacob Thornton

• https://twitter.com/fat
• https://github.com/fat

Code and documentation copyright 2011-2014 Twitter, Inc. Code released under the MIT license. Docs released under Creative Commons.