Bootstrap · The world's most popular mobile-first and responsive front-end framework.

<!DOCTYPE html> <html lang=en> <head> <meta charset=utf-8> <meta content="IE=edge" http-equiv=X-UA-Compatible> <meta content="width=device-width,initial-scale=1" name=viewport> <meta content="Bootstrap, a sleek, intuitive, and powerful mobile first front-end framework for faster and easier web development." name=description> <meta content="Mark Otto, Jacob Thornton, and Bootstrap contributors" name=author> <title> Bootstrap · The world's most popular mobile-first and responsive front-end framework. </title> <link href=dist/css/bootstrap.min.css rel=stylesheet> <link href=assets/css/docs.min.css rel=stylesheet>  <script src=assets/js/ie-emulation-modes-warning.js></script>  <link href=/docs/3.3/apple-touch-icon.png rel=apple-touch-icon> <link href=/docs/3.3/favicon.ico rel=icon> <link rel="canonical" href="https://getbootstrap.com/docs/3.3/"> <script defer src="https://cdn.usefathom.com/script.js" data-site="ITUSEYJG"></script> <script> ! function(e, t, a, n, c, o, s) { e.GoogleAnalyticsObject = c, e[c] = e[c] || function() { (e[c].q = e[c].q || []).push(arguments) }, e[c].l = 1 * new Date, o = t.createElement(a), s = t.getElementsByTagName(a)[0], o.async = 1, o.src = n, s.parentNode.insertBefore(o, s) }(window, document, "script", "https://www.google-analytics.com/analytics.js", "ga"), ga("create", "UA-146052-10", "getbootstrap.com"), ga("set", "anonymizeIp", true), ga("send", "pageview") </script> </head> <body class=bs-docs-home> <a href=#content class="sr-only sr-only-focusable" id=skippy> <div class=container><span class=skiplink-text>Skip to main content</span></div> </a> <a href=https://getbootstrap.com/ class=v4-tease>There's a newer version of Bootstrap!</a> <header class="bs-docs-nav navbar navbar-static-top" id=top> <div class=container> <div class=navbar-header> <button aria-controls=bs-navbar aria-expanded=false class="collapsed navbar-toggle" data-target=#bs-navbar data-toggle=collapse type=button> <span class=sr-only>Toggle navigation</span> <span class=icon-bar></span> <span class=icon-bar></span> <span class=icon-bar></span> </button> <a href=../ class=navbar-brand>Bootstrap</a> </div> <nav class="collapse navbar-collapse" id=bs-navbar> <ul class="nav navbar-nav"> <li> <a href=getting-started/ >Getting started</a> </li> <li> <a href=css/ >CSS</a> </li> <li> <a href=components/ >Components</a> </li> <li> <a href=javascript/ >JavaScript</a> </li> <li> <a href=customize/ >Customize</a> </li> </ul> <ul class="nav navbar-nav navbar-right"> <li><a href=https://themes.getbootstrap.com/ onclick='ga("send","event","Navbar","Community links","Themes")'>Themes</a></li> <li><a href=https://expo.getbootstrap.com/ onclick='ga("send","event","Navbar","Community links","Expo")'>Expo</a></li> <li><a href=https://blog.getbootstrap.com/ onclick='ga("send","event","Navbar","Community links","Blog")'>Blog</a></li> </ul> </nav> </div> </header> <main class=bs-docs-masthead id=content tabindex=-1> <div class=container> <span class="bs-docs-booticon bs-docs-booticon-lg bs-docs-booticon-outline">B</span> <p class=lead>Bootstrap is the most popular HTML, CSS, and JS framework for developing responsive, mobile first projects on the web.</p> <p class=lead> <a href=getting-started/#download class="btn btn-outline-inverse btn-lg" onclick='ga("send","event","Jumbotron actions","Download","Download 3.3.7")'>Download Bootstrap</a> </p> <p class=version>Currently v3.3.7</p> <script async src="https://cdn.carbonads.com/carbon.js?serve=CKYIKKJL&placement=getbootstrapcom" id="_carbonads_js"></script> </div> </main> <div class=bs-docs-featurette> <div class=container> <h2 class=bs-docs-featurette-title>Designed for everyone, everywhere</h2> <p class=lead>Bootstrap makes front-end web development faster and easier. It's made for folks of all skill levels, devices of all shapes, and projects of all sizes.</p> <hr class=half-rule> <div class=row> <div class=col-sm-4> <img alt="Sass and Less support" src=assets/img/sass-less.png class=img-responsive> <h3>Preprocessors</h3> <p>Bootstrap ships with vanilla CSS, but its source code utilizes the two most popular CSS preprocessors, <a href=css/#less>Less</a> and <a href=css/#sass>Sass</a>. Quickly get started with precompiled CSS or build on the source.</p> </div> <div class=col-sm-4> <img alt="Responsive across devices" src=assets/img/devices.png class=img-responsive> <h3>One framework, every device.</h3> <p>Bootstrap easily and efficiently scales your websites and applications with a single code base, from phones to tablets to desktops with CSS media queries.</p> </div> <div class=col-sm-4> <img alt=Components src=assets/img/components.png class=img-responsive> <h3>Full of features</h3> <p>With Bootstrap, you get extensive and beautiful documentation for common HTML elements, dozens of custom HTML and CSS components, and awesome jQuery plugins.</p> </div> </div> <hr class=half-rule> <p class=lead>Bootstrap is open source. It's hosted, developed, and maintained on GitHub.</p> <a href=https://github.com/twbs/bootstrap class="btn btn-outline btn-lg">View the GitHub project</a> </div> </div> <div class="bs-docs-featurette"> <div class="container"> <h2 class="bs-docs-featurette-title">Premium Bootstrap Themes</h2> <p class="lead"> Take Bootstrap 4 to the next level with premium themes from our official marketplace鈥攁ll built on Bootstrap with new components and plugins, docs, and build tools. </p> <p class="lead"> <a href="https://themes.getbootstrap.com/" class="btn btn-outline btn-lg">Browse themes</a> </p> <img class="img-responsive" src="assets/img/bs-themes.png" alt="Bootstrap Themes" width="1024" height="388" style="margin-left: auto; margin-right: auto;"> </div> </div> <div class=bs-docs-featurette> <div class=container> <h2 class=bs-docs-featurette-title>Built with Bootstrap</h2> <p class=lead>Millions of amazing sites across the web are being built with Bootstrap. Get started on your own with our growing <a href=../getting-started/#examples>collection of examples</a> or by exploring some of our favorites.</p> <hr class=half-rule> <div class="row bs-docs-featured-sites"> <div class="col-xs-6 col-sm-3"> <a href=https://expo.getbootstrap.com/2014/10/29/lyft/ rel=noopener target=_blank title=Lyft> <img alt=Lyft src=assets/img/expo-lyft.jpg class=img-responsive> </a> </div> <div class="col-xs-6 col-sm-3"> <a href=https://expo.getbootstrap.com/2014/09/30/vogue/ rel=noopener target=_blank title=Vogue> <img alt=Vogue src=assets/img/expo-vogue.jpg class=img-responsive> </a> </div> <div class="col-xs-6 col-sm-3"> <a href=https://expo.getbootstrap.com/2014/03/13/riot-design/ rel=noopener target=_blank title="Riot Design"> <img alt="Riot Design" src=assets/img/expo-riot.jpg class=img-responsive> </a> </div> <div class="col-xs-6 col-sm-3"> <a href=https://expo.getbootstrap.com/2014/02/12/newsweek/ rel=noopener target=_blank title=Newsweek> <img alt=Newsweek src=assets/img/expo-newsweek.jpg class=img-responsive> </a> </div> </div> <hr class=half-rule> <p class=lead>We showcase dozens of inspiring projects built with Bootstrap on the Bootstrap Expo.</p> <a href=https://expo.getbootstrap.com/ class="btn btn-outline btn-lg">Explore the Expo</a> </div> </div> <footer class=bs-docs-footer> <div class=container> <ul class=bs-docs-footer-links> <li><a href=https://github.com/twbs/bootstrap>GitHub</a></li> <li><a href=https://twitter.com/getbootstrap>Twitter</a></li> <li><a href=getting-started/#examples>Examples</a></li> <li><a href=about/ >About</a> </li> </ul> <p>Designed and built with all the love in the world by <a href=https://twitter.com/mdo rel=noopener target=_blank>@mdo</a> and <a href=https://twitter.com/fat rel=noopener target=_blank>@fat</a>. Maintained by the <a href=https://github.com/orgs/twbs/people>core team</a> with the help of <a href=https://github.com/twbs/bootstrap/graphs/contributors>our contributors</a>.</p> <p>Code licensed <a href=https://github.com/twbs/bootstrap/blob/main/LICENSE target=_blank rel="license noopener">MIT</a>, docs <a href=https://creativecommons.org/licenses/by/3.0/ target=_blank rel="license noopener">CC BY 3.0</a>.</p> </div> </footer> <script src=https://ajax.googleapis.com/ajax/libs/jquery/1.12.4/jquery.min.js></script> <script> window.jQuery || document.write('<script src="../assets/js/vendor/jquery.min.js"><\/script>') </script> <script src=dist/js/bootstrap.min.js></script> <script src=assets/js/docs.min.js></script> <script src=assets/js/ie10-viewport-bug-workaround.js></script>

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Bootstrap · The world's most popular mobile-first and responsive front-end framework.