101316 2012-11-06 00:28:15 -0800 ShadowRoot::insertedInto is called many times without calling removedFrom when parsing <video controls> 2019-10-04 22:48:34 -0700 1 1 1 Unclassified WebKit DOM 528+ (Nightly build) Unspecified Unspecified RESOLVED CONFIGURATION CHANGED P2 Normal --- 72352 1 shinyak webcomponents-bugzilla dglazkov dominicc eric.carlson morrita rniwa webcomponents-bugzilla oldest_to_newest 759344 0 shinyak 2012-11-06 00:28:15 -0800 I noticed this when I was working for Bug 100922. This might cause mysterious errors in future. 760338 1 shinyak 2012-11-06 20:26:44 -0800 The root cause seems HTMLMediaElement creates Shadow subtree in insertedInto(). This seems a bad signal... 762576 2 morrita 2012-11-08 22:31:55 -0800 (In reply to comment #1) > The root cause seems HTMLMediaElement creates Shadow subtree in insertedInto(). > This seems a bad signal... It sounds reasonable to get rid of the shadow construction from insertedInto(). I'm not sure where is the best place though. It needs further investigation. 763079 3 dglazkov 2012-11-09 09:18:23 -0800 Yeah, this is crufty. insertedInto is a really low-level hook, and it's tempting to use it various convenient purposes. However, being a low-level hook, it's also a minefield in situations like this. 1577184 4 rniwa 2019-10-04 22:48:34 -0700 configureMediaControls() is now called in HTMLMediaElement::didFinishInsertingNode() so this is no longer happening.