558640 - Inconsistent/misleading behavior with misplaced FORM tag in TABLE

Status: RESOLVED FIXED

(Core :: DOM: HTML Parser, defect)

Description

[grahamj42]

User-Agent:       Mozilla/5.0 (Windows; U; Windows NT 5.1; en-GB; rv:1.9.2.3) Gecko/20100401 Firefox/3.6.3 (.NET CLR 3.5.30729)
Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-GB; rv:1.9.2.3) Gecko/20100401 Firefox/3.6.3 (.NET CLR 3.5.30729)

It seems not uncommon to find pages where <FORM...> is inserted between <TR> and <TD> in a table, contrary to the standards.
Firefox (in common with other browsers) renders the form correctly in this situation when the page is loaded.
If the table and form are added to the DOM by assignment to innerHTML, the form is not rendered and no error or warning is issued (Firebug confirms that the form is loaded).

Reproducible: Always

Steps to Reproduce:
Load test page dummyloader.html (supplied)
 Or load test page dummyform.html using XMLHttpRequest() and assign it to a div etc.

Actual Results:  
Page (dummyform.html) renders correctly when loaded normally.
Same HTML is silently ignored when assigned to innerHTML (see dummyloader.html).

Expected Results:  
Either:

(a) The same behaviour is exhibited by assignment to innerHTML as when the page is loaded (this is the behaviour exhibited by Internet Explorer).

(b) The fact that the form is not rendered is signalled by an exception, error or warning.

As noted, the expected behaviour is exhibited by Internet Explorer. I do not consider it acceptable that the form is not rendered without warning. This problem was reported by another user in June 2008 under bug 439950 but has not been progressed.

Comment 1

[grahamj42]

Attachment: Minimal example - page loads

Comment 2

[grahamj42]

Attachment: Minimal example - HTML loaded by assignment to innerHTML

Comment 3

[grahamj42]

Attachment: As dummyloader but with correct placement of <TABLE>

Comment 4

[Nickolay_Ponomarev]

Thanks for the testcases! I can reproduce this on a trunk build, but this works fine with the HTML5 parser <http://hsivonen.iki.fi/test-html5-parsing/>

Comment 5

[Henri Sivonen (:hsivonen)]

Marking FIXED per comment 4.