Automatically vendor-prefix stylesheets served by Middleman.

Add the following line to Gemfile, then run bundle install:

gem 'middleman-autoprefixer'

After installation, activate (and optionally configure) the extension in config.rb:

activate :autoprefixer

activate :autoprefixer do |config|
  config.browsers = ['last 2 versions', 'Explorer >= 9']
  config.ignore   = ['/stylesheets/hacks.css']
end

The list of targeted browsers. Takes values and uses defaults accordingly to Autoprefixer’s documentation.

Whether to add vendor prefixes: true or false. Enabled by default.

Whether to remove outdated prefixes: true or false. Enabled by default.

The visual cascade of prefixed properties: true or false. Enabled by default.

Whether to process inline styles within HTML files: true or false. Disabled by default.

The array of patterns or paths to exclude from processing. Empty by default.

Middleman Autoprefixer was created by Dominik Porada and is distributed under the MIT license.