16487 2012-03-23 07:53:12 +0000 EventTarget constructor 2017-04-13 03:33:57 +0000 1 1 1 Unclassified WebAppsWG DOM unspecified PC Windows 3.1 RESOLVED MOVED P2 normal --- 18780 1 annevk annevk bugs erik.arvidsson mike odinho waldron.rick www-dom public-webapps-bugzilla oldest_to_newest 65970 0 annevk 2012-03-23 07:53:12 +0000 Define a way to construct an EventTarget with a modifiable parent chain. Suggestion from smaug: [Constuctor] interface EventReceiver : EventTarget { attribute EventTarget parent; } 75841 1 annevk 2012-10-10 16:24:11 +0000 How were we going to deal with cycles here? 80091 2 annevk 2012-12-13 10:59:19 +0000 Modifying the event parent seems problematic. If we instead pass the parent to the constructor there will never be a problem as far as I can tell. 80093 3 bugs 2012-12-13 13:08:30 +0000 Why is modifying the parent problematic? Nodes can be moved around and that isn't problematic. 80094 4 bugs 2012-12-13 13:09:31 +0000 Though, I'm not sure we need to support modifying .parent. 80176 5 annevk 2012-12-14 11:00:07 +0000 The problem is that when you do event dispatch you need to compute the ancestor chain. If parent becomes settable, A can be a parent of B and B can be a parent of A, which thus far has been impossible and would require the introduction of cycle detection. 80180 6 bugs 2012-12-14 13:27:26 +0000 Of course there would have to be cycle detection. Nodes have it too. 82923 7 annevk 2013-02-11 21:06:16 +0000 My suggestion is that we make it more explicit in the specification that EventTarget has an associated "event parent" concept (we need that anyway). We then allow that concept to be set through the constructor: [Constructor(optional EventTarget = null)] interface EventTarget ... If we want we could expose that concept on the interface, but I don't think we need to do that right away. For nodes this is already covered by parentNode, for custom EventTarget objects this could be manually managed. 100506 8 annevk 2014-02-13 11:41:21 +0000 This does not seem high priority given the other things we have going on. JavaScript will prolly provide this in due course. 128531 9 annevk 2017-04-13 03:33:57 +0000 https://github.com/whatwg/dom/issues/441