Скопировать объект JavaScript
var x = {myProp: "value"};
var y = Object.assign({}, x);
Evil Eel
var x = {myProp: "value"};
var y = Object.assign({}, x); // es6
const obj = {name: 'john', surname: 'smith'};
const objCopy = {...obj};var x = {key: 'value'}
var y = JSON.parse(JSON.stringify(x))
//this method actually creates a reference-free version of the object, unlike the other methods
//If you do not use Dates, functions, undefined, regExp or Infinity within your objectvar 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