popstate event handler seems not to work
javascript
Solution
`pushState` do not trigger the `popstate` event, only clicking back / forward button (or use backspace) or invoking `history.back()` / `history.go(n)` would trigger this event.
Also, in webkit browsers, a `popstate` event would be triggered after page's `onload` event, but Firefox and IE do not have this behavior.
Problem
I'm having a problem with a 'popstate' event handler, this is my code: ``` window.addEventListener("popstate", function (event){ if (event.state) { alert('abc') } }); // The data object is arbitrary and is passed with the popstate event. var dataObject = { createdAt: '2011-10-10', author: 'donnamoss' }; var url = '/posts/new-url'; history.pushState(dataObject, document.title, url); ``` I expected this code will pop up an alert box when it's executed but, nothing happens. Is there anything wrong here? Thank you.