javascript how to create reference

Question

Could you propose any workarounds to implement a reference to variable using closures or any other tricks?

createReference = function() {
    // TODO: how to         


        

Answer 1

In JavaScript, you can't pass primitive values (numbers, strings, etc) by reference. However, every object you pass will always be by reference. (this includes arrays)

To use your example:

var foo = { x: 5 };
var refFoo = foo;

// foo.x => 5
// refFoo.x => 5

foo.x = 6;

// foo.x => 6
// refFoo.x => 6