object.js

var Talkable = {
  talk: function(){
    return this.name + ': ' + this.speech()
  }
}

var Animal = Object |> {
  trait Talkable,
  name: 'Animal',
  get speech() '...'
}

var Cat = Animal |> {
  name: 'Cat',
  get speech() 'meow'
}

var nyan = Cat |> { name: 'Nyan nyan nyan' }