How to client-side detect when a page is bookmarked?

Question

Is it possible to detect when a page is bookmarked within the browser, using Javascript?

Answer 1

I found this question when searching for something similar. Here's how I'm doing it:

When the user uses one of the awesome features of the site I run this code

var bm=confirm("How great is this site? Would you like to bookmark it?");
if (bm==true){
  window.external.AddFavorite(location.href,document.title);
  // and then don't show this again and record that they bookmarked
}

The beautiful part is I'll keep bugging the user to bookmark the page until they do...