binding popstate event not working

Question

I have tried to type this code into the browser's console:

window.onpopstate = function() {alert(1);}

and then click the back button. No alert has shown. Am I doing something wrong? Or is it not allowed to bind popstate event to a page from console?

Using Chrome 24 and Firefox 18

Answer 1

Type this into the console

window.onpopstate = function() {alert(1);}; history.pushState({}, '');

then click the back button.

Answer 2

I prefer adding the popstate listener as follows, to prevent overwriting of what's already in window.onpopstate:

window.addEventListener('popstate', function(){alert(1);});