which of these method of object can clone an object code example

Example 1: how to clone an object

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

Example 2: javascript clone object

var sheep={"height":20,"name":"Melvin"};
var clonedSheep=JSON.parse(JSON.stringify(sheep));

//note: cloning like this will not work with some complex objects such as:  Date(), undefined, Infinity
// For complex objects try: lodash's cloneDeep() method or angularJS angular.copy() method