Reference a Javascript variable by a text alias

Question

Is it possible to reference a JavaScript variable by a text alias? For example:

var x = 2;
var y = convertToVariableRef("x");

After calling the above function: "y would be the same reference as x and not just simply copying the value of x into y".

Answer 1

if you declare an object with out any scope of function its a property of window object, so you can get it reference like this

function convertToVariableRef (ref) {
  return window[ref];
}

var x = 2;
var y = convertToVariableRef("x");

but it just copy the value for primitives , and reference only for non-primitives.

array,objects etc are non-primitives.

var x = [1];
var y = convertToVariableRef("x");
y[0] = 2;

// log: x -->  [2]