onReadyStateChange not firing in IE for XHR Request

Question

I have this code that I am using and it works fine in chrome, but in IE, it looks like that onreadystatechenge is not firing.

How do I get this to work cross browser. I

Answer 1

Apparently IE 11 (which I assume is what you are testing is broken) removed script.onreadystatechange in favor of script.onload.

Here is the compatibility for xhr.onload.

Source of IE11 removing it