I have a CoffeeScript fork (based on Michael Bolin's work) targeting Google Closure's Advanced mode here: https://github.com/lynaghk/coffee-script https://gith

I have a CoffeeScript fork (based on Michael Bolin's work) targeting Google Closure's Advanced mode here: https://github.com/lynaghk/coffee-script https://github.com/lynaghk/coffee-script The motivating use case for me is that ClojureScript (the Clojure->JS compiler) is built on Closure, and when I've wanted to integrate third party JS into my ClojureScript projects I've found it easier to port JS to CoffeeScript than to annotate the existing JS for use with advanced mode.