javascript-pour-les-jedis-episode-3-snippet-13.js

const force = Klass(function Force(name) {
  this.me = name || 'Force';
  this.print = function () {
    return this.me + ' Force';
  };
});

const jedi = Klass(force, function Jedi(name) {
  this.me = name || 'Jedi';
  this.print = function () {
    return this.me + ' POWA!!';
  };
});

const yoda = new jedi('Yoda');
console.log(yoda instanceof jedi); //=> true
console.log(yoda instanceof force); //=> true
console.log(yoda.print()); //=> Yoda POWA!!