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Official Sass port of Bootstrap 2 and 3.

12.8K Stars 3.7K Forks Last release: over 1 year ago (v3.4.1) MIT License 1.0K Commits 61 Releases

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Bootstrap 3 for Sass

Gem Versionnpm versionBower VersionBuild Status


is a Sass-powered version of Bootstrap 3, ready to drop right into your Sass powered applications.

This is Bootstrap 3. For Bootstrap 4 use the Bootstrap rubygem if you use Ruby, and the main repo otherwise.


Please see the appropriate guide for your environment of choice:

a. Ruby on Rails


is easy to drop into Rails with the asset pipeline.

In your Gemfile you need to add the


gem, and ensure that the


gem is present - it is added to new Rails applications by default.

gem 'bootstrap-sass', '~\> 3.4.1' gem 'sassc-rails', '\>= 2.1.0'
bundle install

and restart your server to make the files available through the pipeline.

Import Bootstrap styles in



// "bootstrap-sprockets" must be imported before "bootstrap" and "bootstrap/variables" @import "bootstrap-sprockets"; @import "bootstrap";

must be imported before


for the icon fonts to work.

Make sure the file has


extension (or


for Sass syntax). If you have just generated a new Rails app, it may come with a


file instead. If this file exists, it will be served instead of Sass, so rename it:

$ mv app/assets/stylesheets/application.css app/assets/stylesheets/application.scss

Then, remove all the

\*= require\_self


\*= require\_tree .

statements from the sass file. Instead, use


to import Sass files.

Do not use

\*= require

in Sass or your other stylesheets will not be able to access the Bootstrap mixins or variables.

Bootstrap JavaScript depends on jQuery. If you're using Rails 5.1+, add the


gem to your Gemfile:

gem 'jquery-rails'
$ bundle install

Require Bootstrap Javascripts in



//= require jquery //= require bootstrap-sprockets



should not both be included in




provides individual Bootstrap Javascript files (




, for example), while


provides a concatenated file containing all Bootstrap Javascripts.

Bower with Rails

When using bootstrap-sass Bower package instead of the gem in Rails, configure assets in



# Bower asset paths root.join('vendor', 'assets', 'bower\_components').to\_s.tap do |bower\_path| config.sass.load\_paths \<\< bower\_path config.assets.paths \<\< bower\_path end # Precompile Bootstrap fonts config.assets.precompile \<\< %r(bootstrap-sass/assets/fonts/bootstrap/[\w-]+\.(?:eot|svg|ttf|woff2?)$) # Minimum Sass number precision required by bootstrap-sass ::Sass::Script::Value::Number.precision = [8, ::Sass::Script::Value::Number.precision].max

Replace Bootstrap


statements in



$icon-font-path: "bootstrap-sass/assets/fonts/bootstrap/"; @import "bootstrap-sass/assets/stylesheets/bootstrap-sprockets"; @import "bootstrap-sass/assets/stylesheets/bootstrap";

Replace Bootstrap


directive in



//= require bootstrap-sass/assets/javascripts/bootstrap-sprockets

Rails 4.x

Please make sure


is at least v2.1.4.

Rails 3.2.x

bootstrap-sass is no longer compatible with Rails 3. The latest version of bootstrap-sass compatible with Rails 3.2 is v3.1.1.0.

b. Bower

bootstrap-sass Bower package is compatible with node-sass 3.2.0+. You can install it with:

$ bower install bootstrap-sass

Sass, JS, and all other assets are located at assets.

By default,


main field list only the main


and all the static assets (fonts and JS). This is compatible by default with asset managers such as wiredep.

Node.js Mincer

If you use mincer with node-sass, import Bootstrap like so:



(NB .css.ejs.scss):

// Import mincer asset paths helper integration @import "bootstrap-mincer"; @import "bootstrap";




//= require bootstrap-sprockets

See also this example manifest.js for mincer.

c. npm / Node.js

$ npm install bootstrap-sass



By default all of Bootstrap is imported.

You can also import components explicitly. To start with a full list of modules copy[


]( file into your assets as


. Then comment out components you do not want from


. In the application Sass file, replace

@import 'bootstrap'


@import 'bootstrap-custom';

Sass: Number Precision

bootstrap-sass requires minimum Sass number precision of 8 (default is 5).

Precision is set for Ruby automatically when using the


gem. When using the npm or Bower version with Ruby, you can set it with:

::Sass::Script::Value::Number.precision = [8, ::Sass::Script::Value::Number.precision].max

Sass: Autoprefixer

Bootstrap requires the use of Autoprefixer.Autoprefixer adds vendor prefixes to CSS rules using values from Can I Use.

To match upstream Bootstrap's level of browser compatibility, set Autoprefixer's


option to:

json ["Android 2.3", "Android \>= 4", "Chrome \>= 20", "Firefox \>= 24", "Explorer \>= 8", "iOS \>= 6", "Opera \>= 12", "Safari \>= 6"]




]( contains all of Bootstrap's JavaScript, concatenated in the correct order.

JavaScript with Sprockets or Mincer

If you use Sprockets or Mincer, you can require


instead to load the individual modules:

// Load all Bootstrap JavaScript //= require bootstrap-sprockets

You can also load individual modules, provided you also require any dependencies. You can check dependencies in the Bootstrap JS documentation.

//= require bootstrap/scrollspy //= require bootstrap/modal //= require bootstrap/dropdown


The fonts are referenced as:


defaults to


if asset path helpers are used, and



When using bootstrap-sass with Compass, Sprockets, or Mincer, you must import the relevant path helpers before Bootstrap itself, for example:

@import "bootstrap-compass"; @import "bootstrap";



Import Bootstrap into a Sass file (for example,


) to get all of Bootstrap's styles, mixins and variables!

@import "bootstrap";

You can also include optional Bootstrap theme:

@import "bootstrap/theme";

The full list of Bootstrap variables can be found here. You can override these by simply redefining the variable before the


directive, e.g.:

$navbar-default-bg: #312312; $light-orange: #ff8c00; $navbar-default-color: $light-orange; @import "bootstrap";


Bootstrap is available as an Eyeglass module. After installing Bootstrap via NPM you can import the Bootstrap library via:

@import "bootstrap-sass/bootstrap"

or import only the parts of Bootstrap you need:

@import "bootstrap-sass/bootstrap/variables"; @import "bootstrap-sass/bootstrap/mixins"; @import "bootstrap-sass/bootstrap/carousel";


Bootstrap for Sass version may differ from the upstream version in the last number, known asPATCH. The patch version may be ahead of the corresponding upstream minor. This happens when we need to release Sass-specific changes.

Before v3.3.2, Bootstrap for Sass version used to reflect the upstream version, with an additional number for Sass-specific changes. This was changed due to Bower and npm compatibility issues.

The upstream versions vs the Bootstrap for Sass versions are:

| Upstream | Sass | |---------:|--------:| | 3.3.4+ | same | | 3.3.2 | 3.3.3 | | <= 3.3.1 | 3.3.1.x |

Always refer to when upgrading.

Development and Contributing

If you'd like to help with the development of bootstrap-sass itself, read this section.

Upstream Converter

Keeping bootstrap-sass in sync with upstream changes from Bootstrap used to be an error prone and time consuming manual process. With Bootstrap 3 we have introduced a converter that automates this.

Note: if you're just looking to use Bootstrap 3, see the installation section above.

Upstream changes to the Bootstrap project can now be pulled in using the


rake task.

Here's an example run that would pull down the master branch from the main twbs/bootstrap repo:

rake convert

This will convert the latest LESS to Sass and update to the latest JS. To convert a specific branch or version, pass the branch name or the commit hash as the first task argument:

rake convert[e8a1df5f060bf7e6631554648e0abde150aedbe4]

The latest converter script is located here and does the following:

  • Converts upstream Bootstrap LESS files to its matching SCSS file.
  • Copies all upstream JavaScript into
    , a Sprockets manifest at
    , and a concatenation at
  • Copies all upstream font files into
  • Sets
    in version.rb to the branch sha.

This converter fully converts original LESS to SCSS. Conversion is automatic but requires instructions for certain transformations (see converter output). Please submit GitHub issues tagged with




bootstrap-sass has a number of major contributors:

and a significant number of other contributors.

You're in good company

bootstrap-sass is used to build some awesome projects all over the web, includingDiaspora, rails_admin, Michael Hartl's Rails Tutorial, gitlabhq andkandan.

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