clone an object in javascript

1var student = {name: "Rahul", age: "16", hobby: "football"};
2
3//using ES6
4var studentCopy1 = Object.assign({}, student);
5//using spread syntax
6var studentCopy2 = {...student}; 
7//Fast cloning with data loss
8var studentCopy3 = JSON.parse(JSON.stringify(student));

1let clone = Object.assign({}, objToClone);

1var x = {myProp: "value"};
2var xClone = Object.assign({}, x);
3
4//Obs: nested objects are still copied as reference.

1const first = {'name': 'alka', 'age': 21} 
2const another = Object.assign({}, first);

1var sheep={"height":20,"name":"Melvin"};
2var clonedSheep=JSON.parse(JSON.stringify(sheep));
3
4//note: cloning like this will not work with some complex objects such as:  Date(), undefined, Infinity
5// For complex objects try: lodash's cloneDeep() method or angularJS angular.copy() method

1const person = {
2    firstName: 'John',
3    lastName: 'Doe'
4};
5
6
7// using spread ...
8let p1 = {
9    ...person
10};
11
12// using  Object.assign() method
13let p2 = Object.assign({}, person);
14
15// using JSON
16let p3 = JSON.parse(JSON.stringify(person));