When you view a WebView control in Interactive mode in Microsoft Blend for Visual Studio 2013 Preview, the control is read-only. It doesn't accept keyboard or mouse input as expected.
Currently, there is no resolution or workaround for this problem.
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
Article ID: 2858357 - Last Review: Jun 26, 2013 - Revision: 1