20535 2012-12-31 00:28:03 +0000 consider removing indexed property setters, creators and deleters 2017-12-06 11:15:23 +0000 1 1 1 Unclassified WebAppsWG WebIDL unspecified All All RESOLVED MOVED [v1] P2 normal --- 1 cam cam annevk bzbarsky mike public-script-coord robin tatj11 public-webapps-bugzilla oldest_to_newest 80741 0 cam 2012-12-31 00:28:03 +0000 Array-like interfaces defined using indexed property setters, creators and/or deleters don't behave nicely. They can't be used in conjunction with Array.prototype functions unless we require the interface to support sparse array indexes. They also don't seem to be used (there are plenty of indexed property getters on the other hand). There is at least this use of an indexed property deleter: http://www.whatwg.org/specs/web-apps/current-work/multipage/dnd.html#the-datatransferitemlist-interface but that is pretty weird and bad design anyway IMO. If we can remove indexed property setters, creators and deleters then we can think about a solution for mutable array-like objects that work better with JS Arrays. 80742 1 cam 2012-12-31 00:29:13 +0000 See also https://mail.mozilla.org/pipermail/es-discuss/2012-December/027688.html for problems with [ArrayClass], which is related. 80783 2 bzbarsky 2012-12-31 06:48:07 +0000 HTMLOptionsCollection has an indexed setter/creator, and that's required for web compat. I agree it's weird and bad design and generally crappy, but we can't get rid of it... I'm not sure offhand whether anything needs deleters for backwards compat, but I doubt it. 80790 3 annevk 2012-12-31 11:13:48 +0000 I missed HTMLOptionsCollection as it is not using the terms from IDL. 80798 4 bzbarsky 2012-12-31 17:47:23 +0000 Which terms, out of curiosity? 80800 5 annevk 2012-12-31 18:57:51 +0000 "indexed property setters" and friends. 80801 6 bzbarsky 2012-12-31 19:03:11 +0000 For what it's worth, HTMLSelectElement also has an indexed setter/creator, also required for web compat. I missed it in my scan last night because we haven't converted it to WebIDL yet. 80868 7 robin 2013-01-03 13:06:32 +0000 (In reply to comment #2) > HTMLOptionsCollection has an indexed setter/creator, and that's required for > web compat. I agree it's weird and bad design and generally crappy, but we > can't get rid of it... > > I'm not sure offhand whether anything needs deleters for backwards compat, > but I doubt it. We can't get rid of what's needed for compat, but if we agree that they're bad design (which seems to be the case) we can rename them legacy* to flag the fact that they shouldn't be used for new APIs. 80933 8 annevk 2013-01-05 11:54:06 +0000 Filed bug 20570 and bug 20571 on HTML. 117335 9 cam 2015-01-20 06:48:38 +0000 I removed indexed property deleters: https://github.com/heycam/webidl/commit/291dcc397f48029ac3954b2b0e511f4c14c7631d Leaving this open for potentially renaming the rest to legacy*. 129000 10 annevk 2017-12-06 11:15:23 +0000 Above comment is now tracked by https://github.com/heycam/webidl/issues/100.