On Tue, May 13, 2014 at 5:44 PM, Boris Zbarsky <bzbar...@mit.edu> wrote: > I slightly worry about the performance implications of this and the number > of changes to UAs this will require: any place inside a UA that examines > attribute values (only for global attributes?) would need to consult this > reservation information, right?
Yes. Though maybe not for styling? I suspect if we're going to allow genuine subclassing of existing elements, you would want to potentially override attributes there too. -- http://annevankesteren.nl/
