class.js

class Vegetable {
  constructor(name) {
    this.name = name;
  }
  sayHey(){
    console.log("Sup' I'm a #{@name}")
  }
}

class Tomato extends Vegetable {
  constructor(){
    this.name = "Tomato"
  }
}

tomato = new Tomato;
tomato.sayHey();