IE 11 - Menu Pop-up

[mcorkum]

All pop-up items work in IE11 if the main container is an a href. The button element doesn't work properly in IE11.

If I change the button element to input type=button, it works - but the style is off.

Need to make a markup choice here. Do we stay with button? If so not sure IE11 will work.

[troychaplin]

These work fine when used in the masthead, there's currently an example in develop now using the "submenu" top nav item