Simple SprocketsCoffeeReact replacement for Sprockets 3.0+

coffee_react.rb

# lib/sprockets/coffee_react.rb
require "sprockets"
require "coffee-react"
require "coffee-script"

module Sprockets

  # Transforms cjsx to javascript
  module CoffeeReactTransformer
    def self.call(input)
      coffeescript = CoffeeReact.transform(input[:data])
      javascript   = CoffeeScript.compile(coffeescript)
      { data: javascript }
    end
  end

  # Postprocessing adds displayname to components
  module CoffeeReactPostprocessor
    def self.call(input)
      { data: CoffeeReact.jstransform(input[:data]) }
    end
  end
end

Sprockets.register_mime_type 'text/x-cjsx', extensions: ['.js.cjsx', '.js.coffee.cjsx']
Sprockets.register_transformer 'text/x-cjsx', 'application/javascript', Sprockets::CoffeeReactTransformer
Sprockets.register_postprocessor 'application/javascript', Sprockets::CoffeeReactPostprocessor

Gemfile

gem "coffee-react"

sprockets_extensions.rb

# initializers/sprockets_extensions.rb
Dir[Rails.root + 'lib/sprockets/*.rb'].each do |file|
  require file
end