How to access global variable in function hook in javascript?

Question

I want to use global variable \'x\' in the below hook funcion.

var x = 10; //global variable

var oldA = a;    

a = function a(param){

    alert(x);                


        

Answer 1

To access global Js variable inside function, don't use Var in function scope and mention var in global scope. Eg.