On Sat, Mar 7, 2009 at 4:03 PM, Ian Hickson <i...@hixie.ch> wrote: > On Sat, 7 Mar 2009, Cameron McCormack wrote: >> >> Done: >> >> The value of the internal [[Class]] property of a host object is >> determined as follows: >> * If the host object implements a single interface, then the value >> of the internal [[Class]] property MUST be the identifier of >> that interface. > > I think it would make sense to exclude [NoPrototypeObject] interfaces from > consideration here. > > >> Note that this still technically does not mean you can guarantee that >> the NodeList returned by querySelectorAll() has [[Class]] == "NodeList", >> since it could be that that host object implements another interface, >> which might be required by another spec, or perhaps just because the >> implementation wants to. > > IMHO this is a problem.
What is the problem? I don't think that UA extensions should affect the > [[Class]], and I think that other specs should have a way (e.g. > [NoPrototypeObject]) of always making sure they don't affect the [[Class]] > of existing stuff. An API based on interfaces (the DOM, for example), can only reflect one interface (at most0 in the [[Class]]. What is your use case for designing a program around having to know the [[Class]]? Garrett
