Home

Welcome to the CoffeeScript Wiki!

Want to help CoffeeScript? Read about contributing!

How-To's

• Compiling, Concatenating and Setting Up Build Tools Using cake

Extensibility

• Hooking into the Command-Line Compiler

FAQs

(these will be separated in a new page as content gets added)

• Q: Will you support multiple inheritance/mixins/imports/interfaces/traits or any other fancy class extensions?

  A: The short answer is no. You can do any of the above using helpers.

Solution (1) courtesy of jashkenas:

extend = (obj, mixin) ->
  for name, method of mixin
    obj[name] = method

include =  (klass, mixin) ->
  extend klass.prototype, mixin

class Button
  onClick: -> # do stuff

include Button, Options
include Button, Events

Solution (2) courtesy of sethaurus:

implementing = (mixins..., classReference) ->
  for mixin in mixins
    for key, value of mixin::
      (classReference::)[key] = value
  classReference

Button = implementing Options, Events, class _Button
  onClick: -> # do stuff

If you want to learn more, please read these issues on the tracker: #218, #327, #344, #452 and #636. They should have all the pros and cons and why mixins are not part of the core language.