inheritance.js

// Animal Class
class Animal{
//   A class method
  sayHello(){
    console.log('Hello World');
  }
}
// Goat class
class Cat extends Animal{
  favSport(){
    console.log('Hacking!')
  }
}
// Creating a new object
const jira = new Animal;
jira.sayHello(); // Hello World
jira.favSport(); // Hacking!