Over three decades of development, JavaScript has grown faster, sleeker, more capable, and much more complex. That’s good and bad. It was 30 years ago today, Sgt. JavaScript taught the web to play.

JavaScript is the future, in part thanks to CoffeeScript. Now that it has served its purpose, it's time to move on. Convert your CoffeeScript source to modern JavaScript with decaffeinate. Complete.

This is a library to define sum type constructors and open values by matching against different constructors. The package will help you to write more readable, robust, and expressive Javascript code.