Pass window variable as parameter in Javascript

Question

Passing a window global variable through JS does not seem to be working. The following code is printing true:

window.nada = true;
tata(window.nada);
console.log(window.nada);

function tata(lala) {
  lala = false;
}

How can I affect the window.nada global variable inside the tata function?

Answer 1

Technically, JavaScript uses call-by-sharing.

In practice, you'll have to pass the entire window object, as well as the name of the property you want to change:

tata(window, 'nada');

function tata(window, prop)
{
  window[prop] = false;
}