24741 2014-02-20 06:33:55 +0000 CustomEvent inherits from Event 2014-03-31 17:37:32 +0000 1 1 1 Unclassified WebAppsWG HISTORICAL - DOM3 Events unspecified All All RESOLVED FIXED P2 normal --- 1 vmatva travil crimsteam mike www-dom public-webapps-bugzilla oldest_to_newest 100944 0 vmatva 2014-02-20 06:33:55 +0000 On this diagram ( https://dvcs.w3.org/hg/dom3events/raw-file/tip/html/DOM3-Events.html#event-interfaces ) CustomEvent inherits from Event interface. But IDL says that it doesn't (https://dvcs.w3.org/hg/dom3events/raw-file/tip/html/DOM3-Events.html#interface-CustomEvent). If CustomEvent inherits from Event then dictionary CustomEventInit should inherits from EventInit. 103154 1 crimsteam 2014-03-31 01:43:03 +0000 Looks like bug in D3E interface definition, in DOM4 is correctly http://dom.spec.whatwg.org/#interface-customevent 103187 2 travil 2014-03-31 17:37:32 +0000 Fixed in changelist: https://dvcs.w3.org/hg/dom3events/rev/eab211d2898a Thanks for the report!