Write Concise Declarative Functions with ES6

• When defining functions within objects in ES5, we have to use the keyword function as follows:

const bicycle = {  gear: 2,  setGear: function(newGear) {    this.gear = newGear;  }};

With ES6, you can remove the function keyword and colon altogether when defining functions in objects. Here's an example of this syntax: Here we just refactored the function setGear inside the object bicycle and used the shorthand syntax.

const bicycle = {  gear: 2,  setGear(newGear) {    this.gear = newGear;  }};bicycle.setGear(3);console.log(bicycle.gear); will display 3