679582 - DOMSubtreeModified fires too early

Status: NEW

(Core :: DOM: Events, defect, P5)

Description

[Phil]

User Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:6.0) Gecko/20100101 Firefox/6.0
Build ID: 20110811165603

Steps to reproduce:

Removed a DOM element.


Actual results:

DOMSubtreeModified fired on an ancestor element before the element was removed.


Expected results:

Per the specification, DOMSubtreeModified should fire after the element is removed, the same way it does in Gecko versions < 6

Comment 1

[Phil]

Attachment: Testcase

Attaching testcase.

Reports the number of childnodes after a DOMSubtreeModified event. Firefox 4 and 5 both report 0, while Firefox 6 reports 1.

Comment 2

[Alice0775 White]

Regression window(cached m-c hourly)
Works:
http://hg.mozilla.org/mozilla-central/rev/cc57061c1258
Mozilla/5.0 (Windows NT 6.1; WOW64; rv:6.0a1) Gecko/20110509 Firefox/6.0a1 ID:20110509120627
Fails:
http://hg.mozilla.org/mozilla-central/rev/0abb7330c64c
Mozilla/5.0 (Windows NT 6.1; WOW64; rv:6.0a1) Gecko/20110509 Firefox/6.0a1 ID:20110509130856
Pushlog:
http://hg.mozilla.org/mozilla-central/pushloghtml?fromchange=cc57061c1258&tochange=0abb7330c64c
Triggered by:
Bug 650493 - Simplify mutation events and userdata handlers

Comment 3

[Kanchan Kumari QA]

Is this something that is still being investigated or fixed?

Comment 4

[Jonas Sicking (:sicking) No longer reading bugmail consistently]

I'd rather not make any changes to mutation events until there is a proper spec agreed upon by all major browsers. Right now there's lots of subtle differences and it's not clear who's right since the spec is very vague.

Comment 5

[Jonas Sicking (:sicking) No longer reading bugmail consistently]

Any changes that we make at this point is likely to break more content than it fixes, so we should only do it if we're confident that we won't have to change it again, and that it aligns with other browsers so that everyone is pulling in the same direction.

Comment 6

[Jens Stutte [:jstutte]]

Bulk-downgrade of unassigned, 4 years untouched DOM/Storage bugs' priority.

If you have reason to believe this is wrong (especially for the severity), please write a comment and ni :jstutte.