Crate Prototypes with Classes

prototypesWithClasses.js

'use strict';

//New in ES6
class Animal {
  constructor(voice){
    this.voice = voice || "Grunt"
  }
  speak() {
    console.log(this.voice)
  }
}

class Cat extends Animal {
  constructor(name,color) {
    super("Meowww")
    this.name = name
    this.color = color
  }
}

var fluffy = new Cat("Fluffy", "White")
fluffy.speak()

console.log(fluffy.__proto__.constructor.toString())
console.log(fluffy.__proto__.__proto__.constructor.toString())

//Copy and try at http://www.es6fiddle.net