= !CoffeeScript A language compiling into JavaScript, with a nice syntax close to Python (with some flavors of Ruby as well ;-) ). See http://coffeescript.org/. The easiest way to install a ready-to-use !CoffeeScript compiler is to first install [https://nodejs.org nodejs], then: {{{#!shell npm install -g coffee-script }}} We're not using !CoffeeScript in the Trac code base yet, but this may change in the future (see [TracDev/PortingFromGenshiToJinja#ReplacingITemplateStreamFilter alternatives to ITemplateStreamFilter]). In the meantime, nothing prevents you to use it in your plugins!