Coffeescript is a tool rather than a language. The syntactic conventions of this tool form a sort of "shorthand" for "best practice" javascript which happens to

Coffeescript is a tool rather than a language. The syntactic conventions of this tool form a sort of "shorthand" for "best practice" javascript which happens to be also almost as easy to comprehend as javascript itself, amounting to a net productivity gain. Given that, coffeescript is nothing beyond javascript. It does not have its own ecosystem, its own libraries, its own type system or any of the other baggage that comes with some other compile-to-javascript systems.