CODE EXAMPLE FOR JAVASCRIPT

js class

const Animal = {
  speak() {
    console.log(`${this.name} makes a noise.`);
  }
};

class Dog {
  constructor(name) {
    this.name = name;
  }
}

// If you do not do this you will get a TypeError when you invoke speak
Object.setPrototypeOf(Dog.prototype, Animal);

let d = new Dog('Mitzie');
d.speak(); // Mitzie makes a noise.