IE Document Mode: IE9 Standards Mode - Input Validation Not Working

[codepj]

In IE 10, when you are in document mode IE9 Standards Mode the input validation does not seem to be working correctly.

Demo on the following page demonstrates issue:
http://docs.angularjs.org/api/ng.directive:input.number

Type in letters and it still says it is valid.

[btford]

Does this happen in Real Actual IE 9™ as well or just IE10 in IE9 mode?

[tautvilas]

I can confirm this issue. My app is in an IFrame, parent document has such meta tag:

<meta http-equiv="X-UA-Compatible" content="IE=9,chrome=1"/>

So when viewed in IE11 iframe document mode is 9. Number input validation for minimum value does not work.

However if I open this app in IE9 validation works properly.