how to keep a copy of an object without it changing in js code example

Example 1: copy object javascript

var x = {myProp: "value"};
var y = Object.assign({}, x);

Example 2: copy object javascript

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 object

Example 3: make copy of object javascript

var x = {key: 'value'}
var y = JSON.parse(JSON.stringify(x))

//If you do not use Dates, functions, undefined, regExp or Infinity within your object