Function.coffee

someFunction
  args: [1, 2, 3]
  success: () ->
    console.log "Success!"
  failure: () ->
    console.log "Failure!"

Function.js

someFunction({
  args: [1, 2, 3],
  success: function() {
    return console.log("Success!");
  },
  failure: function() {
    return console.log("Failure!");
  }
});