Static content in website - while URL changes [closed]

Question

Please correct me if my title is not understandable, but I don't understand how this site functions. The URL changes but header is static, and the music plays without interruption.

(url removed)

I'm aware of hash tags, but as I can see here the entire URL changes.

Answer 1

In a nutshell, HTML5.

You can change the URL to anything you like using window.history.pushState()

Have a read of http://diveintohtml5.info/history.html