Classes (EcmaScript 6)

classes-es6.js

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

   saysHello() {
      return "Hello, my name is " + this.name;
   }
}

class Employee extends Person {
   constructor(name, title) {
      super.constructor(name);
      this.title = title;
   }

   describe() {
      return super.saysHello() + " (" + this.title + ")";
   }
}