CSS toolkit from Twitter For Rails 3.1 Asset Pipeline
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Less Rails Bootstrap 3.0.0.wip Build Status

This fork is using 3.0.0-wip Twitter Bootstrap branch. You can read about new bootstrap version here.

Bootstrap is Twitter's toolkit for kickstarting your site or app's CSS. It includes base styles for typography, forms, buttons, tables, grid layout, navigation, alerts, and more. To get started -- check out the Bootstrap docs.

The less-rails-bootstrap project hooks into less-rails and less.rb, making Bootstrap's source LESS files, compiled CSS, and JavaScript files available in the Rails 3.1+ asset pipeline.

The benefits:

  • Assets are namespaced in twitter/bootstrap to avoid asset conflicts.
  • Top level requires to get all stylesheets or javascripts.
  • Ability to import or require individually namespaced stylesheets or javascripts.


LESS requires a JavaScript runtime to work. Which one you use depends on your Ruby implementation. Two are shown for Ruby (MRI) and JRuby. Add only the relevant one to your Gemfile. If you want to use Bootstrap's JavaScript plugins, also add the jquery-rails gem. Finally, add less-rails-bootstrap and run bundle install.

# Gemfile

gem 'therubyracer'  # If using Ruby
gem 'therubyrhino'  # If using JRuby
gem 'jquery-rails'  # If using Bootstrap's JS plugins.
gem 'less-rails-bootstrap', '~> 3.0.0.wip', github: 'sinfin/less-rails-bootstrap-3'

Basic CSS Use

Get the full Bootstrap stylesheet with a single line in your application.css.

  *= require twitter/bootstrap

Please see the less-rails-bootstrap-test repo for examples that customize the CSS output by using LESS. The "CSS Tests Suites" section of the README and code is what you want to focus on. Also, check out the LESS syntax.

Basic JavaScript Use

In application.js, require jQuery first. Now you can add all the Bootstrap plugins with a single line.

//= require jquery
//= require jquery_ujs
//= require twitter/bootstrap

Or include plugins individually.

//= require jquery
//= require jquery_ujs
//= require twitter/bootstrap/modal
//= require twitter/bootstrap/alert


This gem will directly track the semantic versioning of the Twitter Bootstrap project. Our major and minor versions will always match to theirs, though we may have tiny patch level releases specific to this gem.


Simple! Just clone the repo, then run bundle install and bundle exec rake. The tests will begin to run. We also use Travis CI to run our tests. The current build status is:

We also have a test rails project setup using all the examples documented above. If you make a github issue and complain about something, I will likely forward you to this project.



Here are the steps to update the version of twitter bootstrap used.

  • Clone this repository.
  • Run the ./scripts/update_bootstrap.sh script with bootstrap repo version tag argument. For example ./scripts/update_bootstrap.sh 3.0.0-wip.


Twitter Bootstrap Project: http://twitter.github.com/bootstrap

Copyright 2011 Twitter, Inc.

Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at


Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.

Less::Rails is Copyright (c) 2011 Ken Collins, ken@metaskills.net and is distributed under the MIT license.