- From: Adam Barth <w3c@adambarth.com>
- Date: Tue, 12 Oct 2010 23:21:38 -0700
- To: Maciej Stachowiak <mjs@apple.com>
- Cc: Cameron McCormack <cam@mcc.id.au>, public-html@w3.org
On Tue, Oct 12, 2010 at 10:47 PM, Maciej Stachowiak <mjs@apple.com> wrote: > On Oct 12, 2010, at 9:14 PM, Cameron McCormack wrote: >> Various HTML*Collection interfaces and the HTMLFormElement interface >> define callers. Callers seem unpopular with many people, so I am >> wondering how many can actually be safely removed from the spec. >> >> Here are some tests I ran to see where they’re implemented: >> >> http://people.mozilla.com/~cmccormack/tests/callers.html >> http://people.mozilla.com/~cmccormack/tests/callers-quirks.html >> >> The results are here: >> >> http://people.mozilla.com/~cmccormack/tests/callers-results.html >> >> (I left out the HTMLPropertyCollection ones since nobody implements that >> yet.) >> >> So of all the callers, Firefox has been getting away with only >> implementing document.all("blah"), and only for quirks mode. >> >> For HTMLFormElement, it seems only IE implements them. Are they really >> necessary to have in the spec? >> >> I don’t have any data on any of this. Does anyone else? Any browser >> vendors willing to drop any of these callers? :) > > From your results, it seems like Firefox is the odd man out. I think the case against would have to be pretty compelling for every other browser to change to match Firefox. > > I realize some people find custom call behavior distasteful, but it's not really clear to me what the practical problem is with it. > > Also, I find quirks-mode-only DOM behaviors more distasteful than custom call behavior, so if document.all needs it at all, I'd rather do it everywhere than limit to quirks mode. > > I do agree that it would be better not to propagate custom call behavior to objects that didn't have it before. I don't think there is much need for HTMLPropertyCollection to be an HTMLCollection. Here's a related WebKit bug that's received some recent discussion: https://bugs.webkit.org/show_bug.cgi?id=14547 The question there is what typeof should return for these callable objects (i.e., "object" or "function"). Adam
Received on Wednesday, 13 October 2010 06:22:46 UTC