javascript-pour-les-jedis-episode-3-snippet-14.js

class Force {
  constructor(name = 'Force'){
    this.me = name;
  }
  print(){
    return `${this.me} Force`;
  }
}

class Jedi extends Force {
  constructor(name = 'Jedi'){
    super();
    this.me = name;
  }
  print(){
    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!!