949376 - event.initMessageEvent is not a function

Status: RESOLVED FIXED

(Core :: DOM: Core & HTML, defect)

Description

[predrag]

Attachment: initMessageEvent.png

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.

Comment 1

[predrag]

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

Comment 2

[predrag]

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

Comment 3

[:Ms2ger (he/him; ⌚ UTC+1/+2)]

It's back.

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

Comment 4

[:Ms2ger (he/him; ⌚ UTC+1/+2)]

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

Comment 5

[Andrea Marchesini [:baku]]

Attachment: ms.patch

Comment 6

[Olli Pettay [:smaug][[e-mail]]]

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?

Comment 7

[Andrea Marchesini [:baku]]

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

Comment 8

[Wes Kocher (:KWierso) (Not reading bugmail; email directly if needed)]

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

Comment 9

[Andrea Marchesini [:baku]]

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

Comment 10

[Carsten Book [:Tomcat]]

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

Comment 11

[Kohei]

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