Hi, 1) What's the reason for preserving whitespace when a DOMTokenList method is changing the attribute?
2) If preserving whitespace is not important, what about normalizing whitespace during mutation? By normalizing whitespace, I mean splitting tokens (keeping unique ones), doing the DOMTokenList add/remove/toggle operation, and joining tokens together separated by a whitespace. I've already implemented the current spec algorithm in Mozilla [1], but normalizing whitespace should simplify things a bit. It would be interesting to have other implementor's opinion on this. (Note: this was previously raised in [2], but it should have been a new thread.) Sylvain [1] https://bugzilla.mozilla.org/show_bug.cgi?id=501257 [2] http://lists.whatwg.org/htdig.cgi/whatwg-whatwg.org/2009-July/021018.html
