Bootstrap is made with LESS at its core, a dynamic stylesheet language created by our good friend, Alexis Sellier. It makes developing systems-based CSS faster, easier, and more fun.
One of Bootstrap's creators wrote a quick blog post about this, summarized here:
As an extension of CSS, LESS includes variables, mixins for reusable snippets of code, operations for simple math, nesting, and even color functions.
Visit the official website at http://lesscss.org to learn more.
Since our CSS is written with Less and utilizes variables and mixins, it needs to be compiled for final production implementation. Here's how.
Follow the instructions in the project readme on GitHub for compiling via command line.
Download the latest Less.js and include the path to it (and Bootstrap) in the
<link rel="stylesheet/less" href="/path/to/bootstrap.less"> <script src="/path/to/less.js"></script>
To recompile the .less files, just save them and reload your page. Less.js compiles them and stores them in local storage.
The unofficial Mac app watches directories of .less files and compiles the code to local files after every save of a watched .less file. If you like, you can toggle preferences in the app for automatic minifying and which directory the compiled files end up in.
Crunch is a great looking LESS editor and compiler built on Adobe Air.
Created by the same guy as the unofficial Mac app, CodeKit is a Mac app that compiles LESS, SASS, Stylus, and CoffeeScript.
Mac, Linux, and Windows app for drag and drop compiling of LESS files. Plus, the source code is on GitHub.
Quickly start any web project by dropping in the compiled or minified CSS and JS. Layer on custom styles separately for easy upgrades and maintenance moving forward.
Download the latest compiled Bootstrap and place into your project. For example, you might have something like this:
app/ layouts/ templates/ public/ css/ bootstrap.min.css js/ bootstrap.min.js img/ glyphicons-halflings.png glyphicons-halflings-white.png
Copy the following base HTML to get started.
<html> <head> <title>Bootstrap 101 Template</title> <!-- Bootstrap --> <link href="public/css/bootstrap.min.css" rel="stylesheet"> </head> <body> <h1>Hello, world!</h1> <!-- Bootstrap --> <script src="public/js/bootstrap.min.js"></script> </body> </html>
Work in your custom CSS, JS, and more as necessary to make Bootstrap your own with your own separate CSS and JS files.
<html> <head> <title>Bootstrap 101 Template</title> <!-- Bootstrap --> <link href="public/css/bootstrap.min.css" rel="stylesheet"> <!-- Project --> <link href="public/css/application.css" rel="stylesheet"> </head> <body> <h1>Hello, world!</h1> <!-- Bootstrap --> <script src="public/js/bootstrap.min.js"></script> <!-- Project --> <script src="public/js/application.js"></script> </body> </html>