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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>Extend · Twitter Bootstrap</title>
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta name="description" content="">
<meta name="author" content="">
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<li class="">
<a href="./index.html">Home</a>
</li>
<li class="">
<a href="./scaffolding.html">Scaffolding</a>
</li>
<li class="">
<a href="./base-css.html">Base CSS</a>
</li>
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<a href="./components.html">Components</a>
</li>
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<a href="./extend.html">Extend</a>
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</div>
</div>
</div>
<div class="container">
<!-- Subhead
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<header class="jumbotron subhead" id="overview">
<h1>Extending Bootstrap</h1>
<p class="lead">Extend Bootstrap to take advantage of included styles and components, as well as LESS variables and mixins.</p>
</header>
<!-- Docs nav
================================================== -->
<div class="row">
<div class="span3 bs-docs-sidebar">
<ul class="nav nav-list bs-docs-sidenav">
<li><a href="#built-with-less">Built with LESS <i class="icon-chevron-right"></i></a></li>
<li><a href="#compiling">Compiling Bootstrap <i class="icon-chevron-right"></i></a></li>
<li><a href="#static-assets">Use as static assets <i class="icon-chevron-right"></i></a></li>
</ul>
</div>
<div class="span9">
<!-- BUILT WITH LESS
================================================== -->
<section id="built-with-less">
<div class="page-header">
<h1>Built with LESS</h1>
</div>
<h3>Why LESS?</h3>
<p>Bootstrap is made with LESS at its core, a dynamic stylesheet language created by our good friend, <a href="http://cloudhead.io">Alexis Sellier</a>. It makes developing systems-based CSS faster, easier, and more fun.</p>
<h3>What's included?</h3>
<p>As an extension of CSS, LESS includes variables, mixins for reusable snippets of code, operations for simple math, nesting, and even color functions.</p>
<h3>Learn more</h3>
<img style="float: right; height: 36px;" src="assets/img/less-logo-large.png" alt="LESS CSS">
<p>Visit the official website at <a href="http://lesscss.org">http://lesscss.org</a> to learn more.</p>
</section>
<!-- COMPILING LESS AND BOOTSTRAP
================================================== -->
<section id="compiling">
<div class="page-header">
<h1>Compiling Bootstrap with LESS</h1>
</div>
<div class="alert alert-info">
<strong>Note:</strong> If you're submitting a pull request to GitHub with modified CSS, you <strong>must</strong> recompile the CSS via any of these methods.
</div>
<h2>Tools for compiling</h2>
<h3>Node with makefile</h3>
<p>Install the LESS command line compiler, JSHint, Recess, and uglify-js globally with npm by running the following command:</p>
<pre>$ npm install -g less jshint recess uglify-js</pre>
<p>Once installed just run <code>make</code> from the root of your bootstrap directory and you're all set.</p>
<p>Additionally, if you have <a href="https://github.com/mynyml/watchr">watchr</a> installed, you may run <code>make watch</code> to have bootstrap automatically rebuilt every time you edit a file in the bootstrap lib (this isn't required, just a convenience method).</p>
<h3>Command line</h3>
<p>Install the LESS command line tool via Node and run the following command:</p>
<pre>$ lessc ./less/bootstrap.less > bootstrap.css</pre>
<p>Be sure to include <code>--compress</code> in that command if you're trying to save some bytes!</p>
<h3>Javascript</h3>
<p><a href="http://lesscss.org/">Download the latest Less.js</a> and include the path to it (and Bootstrap) in the <code><head></code>.</p>
<pre class="prettyprint">
<link rel="stylesheet/less" href="/path/to/bootstrap.less">
<script src="/path/to/less.js"></script>
</pre>
<p>To recompile the .less files, just save them and reload your page. Less.js compiles them and stores them in local storage.</p>
<h3>Unofficial Mac app</h3>
<p><a href="http://incident57.com/less/">The unofficial Mac app</a> watches directories of .less files and compiles the code to local files after every save of a watched .less file.</p>
<p>If you like, you can toggle preferences in the app for automatic minifying and which directory the compiled files end up in.</p>
<h3>More Mac apps</h3>
<h4><a href="http://crunchapp.net/" target="_blank">Crunch</a></h4>
<p>Crunch is a great looking LESS editor and compiler built on Adobe Air.</p>
<h4><a href="http://incident57.com/codekit/" target="_blank">CodeKit</a></h4>
<p>Created by the same guy as the unofficial Mac app, CodeKit is a Mac app that compiles LESS, SASS, Stylus, and CoffeeScript.</p>
<h4><a href="http://wearekiss.com/simpless" target="_blank">Simpless</a></h4>
<p>Mac, Linux, and PC app for drag and drop compiling of LESS files. Plus, the <a href="https://github.com/Paratron/SimpLESS" target="_blank">source code is on GitHub</a>.</p>
</section>
<!-- Static assets
================================================== -->
<section id="static-assets">
<div class="page-header">
<h1>Use as static assets</h1>
</div>
<p>...</p>
</section>
</div>
</div>
</div>
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<footer class="footer">
<div class="container">
<p class="pull-right"><a href="#">Back to top</a></p>
<p>Designed and built with all the love in the world <a href="http://twitter.com/twitter" target="_blank">@twitter</a> by <a href="http://twitter.com/mdo" target="_blank">@mdo</a> and <a href="http://twitter.com/fat" target="_blank">@fat</a>.</p>
<p>Code licensed under the <a href="http://www.apache.org/licenses/LICENSE-2.0" target="_blank">Apache License v2.0</a>. Documentation licensed under <a href="http://creativecommons.org/licenses/by/3.0/">CC BY 3.0</a>.</p>
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<ul class="footer-links">
<li><a href="http://blog.getbootstrap.com">Read the blog</a></li>
<li><a href="https://github.com/twitter/bootstrap/issues?state=open">Submit issues</a></li>
<li><a href="https://github.com/twitter/bootstrap/wiki">Roadmap and changelog</a></li>
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