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next gen js - copying by reference & real copy
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| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <meta charset="utf-8"> | |
| <meta name="viewport" content="width=device-width"> | |
| <title>JS Bin</title> | |
| </head> | |
| <body> | |
| <script id="jsbin-javascript"> | |
| 'use strict'; | |
| var _extends = Object.assign || function (target) { for (var i = 1; i < arguments.length; i++) { var source = arguments[i]; for (var key in source) { if (Object.prototype.hasOwnProperty.call(source, key)) { target[key] = source[key]; } } } return target; }; | |
| var person = { | |
| name: 'Max' | |
| }; | |
| var secondPerson = person; | |
| person.name = 'Manu'; | |
| console.log(secondPerson); | |
| var thirdPerson = { | |
| name: 'Max' | |
| }; | |
| var fourthPerson = _extends({}, thirdPerson); | |
| thirdPerson.name = 'Manu'; | |
| console.log(fourthPerson); | |
| </script> | |
| <script id="jsbin-source-javascript" type="text/javascript">const person = { | |
| name: 'Max' | |
| }; | |
| const secondPerson = person; | |
| person.name = 'Manu'; | |
| console.log(secondPerson); | |
| const thirdPerson = { | |
| name: 'Max' | |
| }; | |
| const fourthPerson = { | |
| ...thirdPerson | |
| }; | |
| thirdPerson.name = 'Manu'; | |
| console.log(fourthPerson);</script></body> | |
| </html> |
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| 'use strict'; | |
| var _extends = Object.assign || function (target) { for (var i = 1; i < arguments.length; i++) { var source = arguments[i]; for (var key in source) { if (Object.prototype.hasOwnProperty.call(source, key)) { target[key] = source[key]; } } } return target; }; | |
| var person = { | |
| name: 'Max' | |
| }; | |
| var secondPerson = person; | |
| person.name = 'Manu'; | |
| console.log(secondPerson); | |
| var thirdPerson = { | |
| name: 'Max' | |
| }; | |
| var fourthPerson = _extends({}, thirdPerson); | |
| thirdPerson.name = 'Manu'; | |
| console.log(fourthPerson); |
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