predrag Reporter
	Description • 11 years ago

User Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:26.0) Gecko/20100101 Firefox/26.0 (Beta/Release)
Build ID: 20131205075310

Steps to reproduce:

From https://github.com/gimite/web-socket-js:
...
var event = document.createEvent("MessageEvent");
event.initMessageEvent("message", false, false, data, null, null, window, null);
return event;
...


Actual results:

Firefox 26 throws an error: TypeError: event.initMessageEvent is not a function
and crashes the web application.

Firefox 25 works just fine.


Expected results:

The event should have been created, like it is in Firefox 25.

	predrag Reporter
	Comment 1 • 11 years ago

https://bugzilla.mozilla.org/show_bug.cgi?id=848294

	predrag Reporter
	Comment 2 • 11 years ago

fixed by replacing event.initMessageEvent with:
var event = new MessageEvent('message', {
	'view': window,
	'bubbles': false,
	'cancelable': false,
	'data': data
});

	:Ms2ger (he/him; ⌚ UTC+1/+2)
	Comment 3 • 9 years ago

It's back.

https://www.w3.org/Bugs/Public/show_bug.cgi?id=25907

	:Ms2ger (he/him; ⌚ UTC+1/+2)
	Comment 4 • 9 years ago

Though note I just filed https://github.com/whatwg/html/issues/228

	Olli Pettay [:smaug][bugs@pettay.fi]
	Comment 6 • 9 years ago

Comment on attachment 8669643 [details] [diff] [review]
ms.patch

>+
>+    nsCOMPtr<nsIDOMMessageEvent> event = this;
>+    mPorts = new MessagePortList(event, ports);
This looks a bit ugly.
Why can't the first param be just
static_cast<Event*>(this) or so?

	Andrea Marchesini [:baku] Assignee
	Comment 7 • 9 years ago

https://hg.mozilla.org/integration/mozilla-inbound/rev/7ce1d1bada46

	Wes Kocher (:KWierso) (Not reading bugmail; email directly if needed)
	Comment 8 • 9 years ago

Backed out in https://hg.mozilla.org/integration/mozilla-inbound/rev/4edbfdc54d3d for wpt failures like:
https://treeherder.mozilla.org/logviewer.html#?job_id=15332505&repo=mozilla-inbound

	Andrea Marchesini [:baku] Assignee
	Comment 9 • 9 years ago

https://hg.mozilla.org/integration/mozilla-inbound/rev/e04c59fd01c4

	Carsten Book [:Tomcat]
	Comment 10 • 9 years ago

https://hg.mozilla.org/mozilla-central/rev/e04c59fd01c4

	Kohei Yoshino [:kohei]
	Comment 11 • 9 years ago

Updated the site compatibility doc: https://www.fxsitecompat.com/en-US/docs/2013/messageevent-has-been-updated/