ex

class Person {
  constructor(name) {
    this.name = name;
  }
  sayHi() {
    console.log("Hi I am", this.name, " I am a human");
  }
}
class Robot extends Person {
  constructor(name) {
    super(name);
  }
  sayHi() {
    console.log("Hi I am", this.name, " I am a robot");
  }
}

let person = new Person("John smith");
let sofia = new Robot("SOFIA");

person.sayHi(); //Hi I am john smith, I am a human
sofia.sayHi();  //Hi I am SOFIA , I am a robot