Damn, history web API really sucks for SPAs that have a hierarchical navigation structure.

For example there's no built-in way to know whether the back or forwards button were clicked, only that one of them was clicked.

And if you reload the page, any state you pushed remains in the history stack. So the user might not be able to go back in your application anymore, but they can still press the browser back button and all those states you pushed will be fucking up your navigation system