Does not work in IE10

[SerjoPepper]

Hello, your library doesn't work in IE10

[Axnyff]

It indeed looks like document.documentElement has a doScroll function on IE9 IE10 so the regex will not match an interactive readyState but IE9 and IE10 both have an interactive ready state which means the callback will never be called.

I can do a PR to try and fix that issue

[dlin-me]

I can confirm that it does not work in IE10.