Bootstrap

Intro

Bootstrap is a free and open-source CSS framework directed at responsive, mobile-first front-end web development. It contains CSS- and JavaScript-based design templates for typography, forms, buttons, navigation, and other interface components.

Build fast, responsive sites with Bootstrap

Quickly design and customize responsive mobile-first sites with Bootstrap, the world’s most popular front-end open source toolkit, featuring Sass variables and mixins, responsive grid system, extensive prebuilt components, and powerful JavaScript plugins.

BootstrapCDN

When you only need to include Bootstrap’s compiled CSS or JS, you can use BootstrapCDN.

See it in action with our simple starter template, or browse the examples to jumpstart your next project.

Bootstrap Icons

For the first time ever, Bootstrap has its own open source SVG icon library, designed to work best with our components and documentation.

Bootstrap Icons are designed to work best with Bootstrap components, but they’ll work in any project. They’re SVGs, so they scale quickly and easily, can be implemented in several ways, and can be styled with CSS.

Official 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.

Team

Bootstrap is maintained by a small team of developers on GitHub. We’re actively looking to grow this team and would love to hear from you if you’re excited about CSS at scale, writing and maintaining vanilla JavaScript plugins, and improving build tooling processes for frontend code.

  • Andres Galante

  • Bardi Harborow

  • Connor Sears

  • Chris Rebert

  • fat

  • Johann-S Johann-S

  • Martijn Cuppens

  • Mark Otto mdo

  • Patrick H. Lauke

  • Thomas McDonald

  • XhmikosR

  • Shohei Yoshida

History

Originally created by a designer and a developer at Twitter, Bootstrap has become one of the most popular front-end frameworks and open source projects in the world.

Bootstrap was created at Twitter in mid-2010 by @mdo and @fat. Prior to being an open-sourced framework, Bootstrap was known as Twitter Blueprint. A few months into development, Twitter held its first Hack Week and the project exploded as developers of all skill levels jumped in without any external guidance. It served as the style guide for internal tools development at the company for over a year before its public release, and continues to do so today.

Originally released on Friday, August 19, 2011, we’ve since had over twenty releases, including two major rewrites with v2 and v3. With Bootstrap 2, we added responsive functionality to the entire framework as an optional stylesheet. Building on that with Bootstrap 3, we rewrote the library once more to make it responsive by default with a mobile first approach.

With Bootstrap 4, we once again rewrote the project to account for two key architectural changes: a migration to Sass and the move to CSS’s Flexbox. Our intention is to help in a small way to move the web development community forward by pushing for newer CSS properties, fewer dependencies, and new technologies across more modern browsers.

official getbootstrap.com


src en.wikipedia.org