CoffeeScript Paradigm Multi-paradigm: prototype-based, functional, imperative, scripting Designed by Jeremy Ashkenas Developer Jeremy Ashkenas, Colin Runciman, et al. First appeared December 13, 2009 (2009-12-13) Stable release 1.12.2 / December 16, 2016 (2016-12-16) OS Cross-platform License MIT License Filename extensions .coffee, .litcoffee Website coffeescript.org Influenced by Haskell, JavaScript, Perl, Python,[1] Ruby, YAML[2] Influenced MoonScript, LiveScript