How to clone an object in javascript?

Question

I want to pass an object per function parameter, but I don’t want that object to be changed. For this I want to pass a clone parameter.

Because in javascript, by the tests I did, the object is always passed by reference.

Example:

a = {}
b = a;

b.nome = 'Wallace';

console.log(a, b); //Object {nome: "Wallace"} Object {nome: "Wallace"}

See that the two objects have been changed.

How to do this assignment of b for a in javascript, without keeping the references?

Answer 1

With Object.create():

Example:

a = {}
b = Object.create(a);
b.nome = 'Gabriel';
a.nome = 'Wallace';
document.write(JSON.stringify(a), JSON.stringify(b))

Answer 2

I was able to clone through the method $.extend jQuery.

Behold:

a = {}

b = $.extend({}, a);

b.nome = 'Teste';


document.write(JSON.stringify(a), JSON.stringify(b))

<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>