CoffeeScript is a little language that compiles into JavaScript. Underneath that awkward Java-esque patina, JavaScript has always had a gorgeous heart. CoffeeScript is an attempt to expose the good parts of JavaScript in a simple way.

The golden rule of CoffeeScript is: “It’s just JavaScript.” The code compiles one-to-one into the equivalent JS, and there is no interpretation at runtime. You can use any existing JavaScript library seamlessly from CoffeeScript (and vice-versa). The compiled output is readable, pretty-printed, and tends to run as fast or faster than the equivalent handwritten JavaScript.

Latest Version: 2.7.0

# Install locally for a project:
npm install --save-dev coffeescript

# Install globally to execute .coffee files anywhere:
npm install --global coffeescript

Overview

CoffeeScript on the topleft, compiled JavaScript output on the bottomright. The CoffeeScript is editable!