Internet Explorer Browser Sniffing Breaks in IE11

[OlduwanSteve]

There are special cases for IE to make block editing work (because IE needs the angle brackets around the tag name, <H1> instead of H1). However, IE11 deliberately breaks browser sniffing so these special cases don't work.

Unfortunately the special cases are still needed, but some replacement browser sniffing is needed, or another method of feature detection. I'm not sure how you would 'feature detect' this - maybe do a one-time hidden edit and check if it actually changes the tag of the element?

[OlduwanSteve]

There's always this for a quick fix:

http://stackoverflow.com/questions/17907445/how-to-detect-ie11