coffeescript/documentation/sections/classes.md

Classes

CoffeeScript 1 provided the class and extends keywords as syntactic sugar for working with prototypal functions. With ES2015, JavaScript has adopted those keywords; so CoffeeScript 2 compiles its class and extends keywords to ES2015 classes.

codeFor('classes', true)

Static methods can be defined using @ before the method name:

codeFor('static', 'Teenager.say("Are we there yet?")')

Finally, class definitions are blocks of executable code, which make for interesting metaprogramming possibilities. In the context of a class definition, this is the class object itself; therefore, you can assign static properties by using @property: value.