Practice Yourself - JS Class Inheritance

Code Editor javascript

class Animal {
  constructor(name, sound) {
    this.name = name;
    this.sound = sound;
  }

  speak() {
    return `${this.name} says ${this.sound}`;
  }
}

class Dog extends Animal {
  constructor(name) {
    super(name, 'Woof!');
  }

  fetch(item) {
    return `${this.name} fetches the ${item}`;
  }
}

const dog = new Dog('Rex');
console.log(dog.speak());       // Rex says Woof!
console.log(dog.fetch('ball')); // Rex fetches the ball