For questions about CoffeeScript - a little language that compiles into JavaScript.
"CoffeeScript is a little language that compiles into JavaScript" (source: http://coffeescript.org/).
CoffeScript is one of the mini-languages that produce JavaScript code. The main difference with other implementations is that it does not try to "hide" or substitute actual JavaScript, just to fill in some gaps and ensure best practices. There are plugins for many programming frameworks as well as a stand alone and on-line compilers. It's syntax borrows popular ideas from Ruby and Python.