Wt

The issue is reproducible with the widgetgalley.wt app, using IE10 or IE11 and Wt (3.3.1-33-g5114f44) or current http://www.webtoolkit.eu/widgets. To drive the problem, click on one of the Navbar menu items, such as "Forms" --- and it will appear as expected. But, subsequent clicks on Navbar entries will not update the page. NOTE: The page remains active and the left-hand menu will continue to respond.

The problem appears to be that portions of the widgetgallery now use progressive boot. Wt relies on a separate code path for initializing the X-UA-Compatible meta header with progressive boot and that code path is setting the compatibility mode to IE9, which does not support the expected animationend events.

I've attached a patch that seems to address the issue, though it has only been lightly tested. Please see comments included in patch header for details.