Future of javascript

ES6 classes.js

class Coupon {
  constructor(options) {
    this.title = options.title;
    this.desc = options.desc;
    this.code = options.code;
    this.link = options.link;
    this.expiry = options.expiry;
  }
}

class OnlineCoupon extends Coupon {
  constructor(options) {
    super(options);
    this.merchantLandingURL = options.merchantLandingURL;
  }
}

class RestaurantCoupon extends Coupon {
  constructor(options) {
    super(options);
    this.phone = options.phone;
    this.timings = options.timings;
    this.outlets = options.outlets; 
  }
}

var foodpandaCoupon = new OnlineCoupon({
    title: "Flat 33% Off on Rs. 450+ (All Users)",
    desc: "Get flat 33% discount on orders of Rs. 450 and above. Maximum discount value is Rs. 150. Offer valid on online payments only.",
    code: "CDAUPUSH",
    link: "http://www.coupondunia.in/foodpanda/flat-33-percent-off-on-orders-all-users-108693",
    expiry: "1441993991672",
    merchantLandingURL: "https://www.foodpanda.in/"
});

console.log(foodpandaCoupon);

native observable examples.js

Object.observe(object, function(changeRecords) {
    changeRecords.forEach(function(cr) {
        console.log(cr.name + ' ' + cr.type);
    });
});

object.a = 1; // a add

object.a = 1; // prints nothing in console

object.b = 1; // b add

delete object.a ; // a delete

template strings.js

(function () {
  "use strict";
  let fname = 'sandesh';
  let lname = 'damkondwar';
  console.log(`${fname}` + ` ` + `${lname}`); // "sandesh damkondwar"
})();