Call by reference with JavaScript

var globalVariable = {};
globalVariable.arrayOne = [1, 2, 3];
var referenceVariable = globalVariable.arrayOne;
 
console.log('Size of arrayOne: '+globalVariable.arrayOne.length);
console.log('Size of referenceVariable: '+referenceVariable.length);
 
// Add something to the referenceVariable...
referenceVariable.push(72);
 
console.log('EFFECT OF CALL BY REFERENCE');
console.log('Size of referenceVariable: '+referenceVariable.length);
console.log('Size of arrayOne: '+globalVariable.arrayOne.length);