Sprockets ES6


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


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

Asset manifests required for precompiling

.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.