1739294 - BroadcastChannel: Ignore messages from detached iframes / closing workers

Status: RESOLVED FIXED

(Core :: DOM: postMessage, enhancement)

Description

[Andrew Williams]

User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/95.0.4638.69 Safari/537.36

Steps to reproduce:

Pending an update to the spec [1], calling postMessage on BroadcastChannel objects associated with detached iframes or closing workers should have no effect.

See new tests in [2] for more details.

Related: https://bugzilla.mozilla.org/show_bug.cgi?id=1738161

[1] https://github.com/whatwg/html/issues/7219
[2] https://github.com/web-platform-tests/wpt/pull/31290

Actual results:

BroadcastChannel messages get delivered from detached iframe / closing worker contexts in certain cases.

Expected results:

BroadcastChannel messages get ignored went sent from detached iframe / closing worker contexts.

Comment 1

[Eden Chuang[:edenchuang]]

This would be fixed with bug 1800659.

Comment 2

[Andrew Sutherland [:asuth] (he/him)]

(In reply to Eden Chuang[:edenchuang] from comment #1)

This would be fixed with bug 1800659.

Landed, marking fixed.