JSFiddle - React, Tailwind, and code Playground

JavaScript

console.log("start");
var a = [
{
	firstName: "taranath",
  lastName: "chebrolu"
},
{
  firstName: "saurabh",
  lastName: "bajpai"
}];

var b = [{
  firstName: "rohit",
  lastName: "lal"
}];

var values = $.extend(true, a, b);
console.log(values);