Have a need for Bootstrap's brand resources? Great! We have only a few guidelines we follow, and in turn ask you to follow as well. These guidelines were inspired by MailChimp's [Brand Assets](http://mailchimp.com/about/brand-assets/).
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](https://twitter.com/mdo) and [@fat](https://twitter.com/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](https://blog.twitter.com/2010/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](https://blog.twitter.com/2011/bootstrap-twitter) on [<time datetime="2011-08-19 11:25">Friday, August 19, 2011</time>](https://twitter.com/mdo/statuses/104620039650557952), we've since had over [twenty releases](https://github.com/twbs/bootstrap/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.
\ No newline at end of file
Originally [released](https://blog.twitter.com/2011/bootstrap-twitter) on [<time datetime="2011-08-19 11:25">Friday, August 19, 2011</time>](https://twitter.com/mdo/statuses/104620039650557952), we've since had over [twenty releases](https://github.com/twbs/bootstrap/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.
Bootstrap is released under the MIT license and is copyright {{ site.time | date: "%Y" }} Twitter. Boiled down to smaller chunks, it can be described with the following conditions.
Bootstrap is maintained by the founding team and a small group of invaluable core contributors, with the massive support and involvement of our community.
Community members have translated Bootstrap's documentation into various languages. None are officially supported and they may not always be up to date.
Group a series of buttons together on a single line with the button group. Add on optional JavaScript radio and checkbox style behavior with [our buttons plugin](../javascript/#buttons).
A **card** is a flexible and extensible content container. It includes options for headers and footers, a wide variety of content, contextual background colors, and powerful display options.
The navbar is a simple wrapper for positioning branding, navigation, and other elements. It's easily extensible and with the help of our collapse plugin it can easily integrate offscreen content.
Navigation available in Bootstrap share general markup and styles, from the base `.nav` class to the active and disabled states. Swap modifier classes to switch between each style.
Part of Bootstrap's job is to provide an elegant, consistent, and simple baseline to build upon. We use Reboot, a collection of element-specific CSS changes in a single file, to kickstart that.
Due to the widespread use of tables across third-party widgets like calendars and date pickers, we've designed our tables to be **opt-in**. Just add the base class `.table` to any `<table>`.
Inspired by the excellent jQuery.tipsy plugin written by Jason Frame; Tooltips are an updated version, which don't rely on images, use CSS3 for animations, and data-attributes for local title storage.
Bootstrap includes simple and easily customized typography for headings, body text, lists, and more. For even more control, check out the [textual utility classes](/components/utilities/).
Bootstrap includes dozens of utilities—classes with a single purpose. They're designed to reduce the frequency of highly repetitive declarations in your CSS down while allowing for quick and easy development.
Bootstrap follows common web standards and—with minimal extra effort—can be used to create sites that are accessible to those using <abbrtitle="Assistive Technology"class="initialism">AT</abbr>.
Bootstrap uses [Grunt](http://gruntjs.com) for its build system, with convenient methods for working with the framework. It's how we compile our code, run tests, and more.
New to Bootstrap 4, variable-based customization is a way for folks to quickly enable or disable global styles across all of Bootstrap's CSS. Simply update a variable's value and recompile using our Gruntfile.
Bootstrap includes a handful of JavaScript to help bring some of our components to life. Learn more about how to include it, our data and programmatic API options, and more.
...
...
@@ -103,4 +104,3 @@ Bootstrap's plugins don't fall back particularly gracefully when JavaScript is d
For simple transition effects, include `transition.js` once alongside the other JS files. If you're using the compiled (or minified) `bootstrap.js`, there is no need to include this—it's already there.
Transition.js is a basic helper for `transitionEnd` events as well as a CSS transition emulator. It's used by the other plugins to check for CSS transition support and to catch hanging transitions.
Quickly add Bootstrap to your project via the [Bootstrap CDN](http://bootstrapcdn.com), graciously provided by the [MaxCDN](http://www.maxcdn.com/) folks.
Quickly add Bootstrap to your project via the Bootstrap CDN, graciously provided by the MaxCDN folks.
Bootstrap is built to work best with the latest techniques. As such, older desktop and mobile browsers may display differently, but should remain fully functional.
Start with this basic HTML template, or modify [these examples](../examples/). We hope you'll customize our templates and examples, adapting them to suit your needs.
Abstract object styles for building custom components (like blog comments, Tweets, etc) that feature a left- or right-aligned image alongside textual content.
For faster mobile-friendly development, use these utility classes for showing and hiding content by device via media query. Also included are utility classes for toggling content when printed.
The scaffolding of Bootstrap refers to our general approach to building the project. It outlines the basic document requirements and project dependencies.
Bootstrap 4 is a major rewrite of almost the entire project. The most notable changes are summarized immediately below, followed by more specific class and behavioral changes to relevant components.
