Experimental

A Sprockets transformer that converts ES6 code into vanilla ES5 with Babel JS.

# Gemfile
gem 'sprockets', '>= 3.0.0'
gem 'sprockets-es6'

# application.rb
# [...]
require "action_view/railtie"
require "sprockets/railtie"
# require "rails/test_unit/railtie"
require 'sprockets/es6'
# [...]

// app.es6

let square = (x) => x * x

class Animal {
  constructor(name) {
    this.name = name
  }
}

This plugin is primarily experimental and will never reach a stable 1.0. The purpose is to test out BabelJS features on Sprockets 3.x and include it by default in Sprockets 4.x.

.es6 won't work directly with config.assets.precompile = %w( foo.es6 ) for annoying compatibility reasons with Sprockets 2.x. Besides, you should look into moving away from config.assets.precompile and using manifests instead. See Sprockets 3.x UPGRADING guide.