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Bootstrap for Sass

bootstrap-sass 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 Ruby gem if you use Ruby, and the main repo otherwise.

Installation

Please see the appropriate guide for your environment of choice:

• Ruby on Rails.
• Compass not on Rails.
• Bower.
• npm / Node.js.

a. Ruby on Rails

bootstrap-sass is easy to drop into Rails with the asset pipeline.

In your Gemfile you need to add the bootstrap-sass gem, and ensure that the sass-rails gem is present - it is added to new Rails applications by default.

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

Import Bootstrap styles in app/assets/stylesheets/application.scss:

bootstrap-sprockets must be imported before bootstrap for the icon fonts to work.

Make sure the file has .scss extension (or .sass for Sass syntax). If you have just generated a new Rails app, it may come with a .css file instead. If this file exists, it will be served instead of Sass, so rename it:

Then, remove all the *= require_self and *= require_tree . statements from the sass file. Instead, use @import 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.

Require Bootstrap Javascripts in app/assets/javascripts/application.js:

bootstrap-sprockets and bootstrap should not both be included in application.js.

bootstrap-sprockets provides individual Bootstrap Javascript files (alert.js or dropdown.js, for example), while bootstrap 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 config/application.rb:

Replace Bootstrap @import statements in application.scss with:

Replace Bootstrap require directive in application.js with:

Rails 4.x

Please make sure sprockets-rails 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. Compass without Rails

Install the gem:

If you have an existing Compass project:

1. Require bootstrap-sass in config.rb:

2. Install Bootstrap with:

If you are creating a new Compass project, you can generate it with bootstrap-sass support:

or, alternatively, if you're not using a Gemfile for your dependencies:

This will create a new Compass project with the following files in it:

• styles.sass - main project Sass file, imports Bootstrap and variables.
• _bootstrap-variables.sass - all of Bootstrap variables, override them here.

Some bootstrap-sass mixins may conflict with the Compass ones. If this happens, change the import order so that Compass mixins are loaded later.

c. Bower

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

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

By default, bower.json main field list only the main _bootstrap.scss 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:

In application.css.ejs.scss (NB .css.ejs.scss):

In application.js:

See also this example manifest.js for mincer.

d. npm / Node.js

Configuration

Sass

By default all of Bootstrap is imported.

You can also import components explicitly. To start with a full list of modules copy _bootstrap.scss file into your assets as _bootstrap-custom.scss. Then comment out components you do not want from _bootstrap-custom. In the application Sass file, replace @import 'bootstrap' with:

Sass: Number Precision

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

Precision is set for Rails and Compass automatically. When using Ruby Sass compiler standalone or with the Bower version you can set it with:

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 browsers option to:

JavaScript

correct order.

JavaScript with Sprockets or Mincer

If you use Sprockets or Mincer, you can require bootstrap-sprockets instead to load the individual modules:

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

Fonts

The fonts are referenced as:

$icon-font-path defaults to bootstrap/ if asset path helpers are used, and ../fonts/bootstrap/ otherwise.

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

Usage

Sass

Import Bootstrap into a Sass file (for example, application.scss) to get all of Bootstrap's styles, mixins and variables!

You can also include optional Bootstrap theme:

The full list of Bootstrap variables can be found here. You can override these by simply redefining the variable before the @import directive, e.g.:

Eyeglass

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

or import only the parts of Bootstrap you need:

Version

Bootstrap for Sass version may differ from the upstream version in the last number, known as PATCH. 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:

Always refer to CHANGELOG.md 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 convert 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 assets/javascripts/bootstrap, a Sprockets manifest at assets/javascripts/bootstrap-sprockets.js, and a concatenation at assets/javascripts/bootstrap.js.
• Copies all upstream font files into assets/fonts/bootstrap.
• Sets Bootstrap::BOOTSTRAP_SHA 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 conversion.

Credits

bootstrap-sass has a number of major contributors:

• Thomas McDonald
• Tristan Harward
• Peter Gumeson
• Gleb Mazovetskiy

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, including Diaspora, rails_admin, Michael Hartl's Rails Tutorial, gitlabhq and kandan.