jQuery extend
JavaScript
const firstObj = {
name: "John Doe",
address: { city: "Mumbai", country: "India" },
age: 25
};
const secondObj = {
address: { country: "United Kingdom" },
phone: "7878954123"
};
console.log($.extend(true, firstObj, secondObj ));
console.log($.extend(false, firstObj, secondObj ));