56809 - Objects with a negative tabIndex should omitted from the tabbing order

Status: VERIFIED INVALID

(Core :: Layout, defect, P3)

Description

[Henrik Gemal]

Objects with a negative tabIndex should be omitted from the tabbing order.
These is not the case in Mozilla.
Check the link:
http://msdn.microsoft.com/workshop/samples/author/dhtml/refs/tabindex1.htm
here tabbing should make the "Submit" button active.

Comment 1

[Antti Näyhä]

http://www.w3.org/TR/REC-html40/interact/forms.html#h-17.11.1 says that 
'tabindex' value "must be a number between 0 and 32767".  Negative values are 
not mentioned.

Most obvious way of error handling here would be that a tabindex with a negative 
value is equivalent to no tabindex attribute at all.  Actually *using* negative 
tabindex values for something (in this case, omitting elements from tabbing 
order) sounds like a standard violation - or a proprietary extension at the very 
least.

Use the HTML 4.0 'disabled' attribute instead for disabling form elements:
http://www.w3.org/TR/REC-html40/interact/forms.html#disabled
(Obviously, this is a bit different thing, since disabled elements can be 
accessed neither from the keyboard *nor* with the mouse.  Still, it's the only 
way for omitting elements from the tabbing order mentioned by the spec.)

Marking Resolved/Invalid.

Comment 2

[Loco]

Marking VERIFIED.

Comment 3

[Heikki Toivonen (remove -bugzilla when emailing directly)]

SPAM. HTML Element component deprecated, changing component to Layout. See bug
88132 for details.

Comment 4

[Jesse Ruderman]

*** Bug 145297 has been marked as a duplicate of this bug. ***

Comment 5

[Patrick]

*** Bug 189306 has been marked as a duplicate of this bug. ***

Comment 6

[Jo Hermans]

*** Bug 218028 has been marked as a duplicate of this bug. ***

Comment 7

[Bill Mason]

*** Bug 244143 has been marked as a duplicate of this bug. ***

Comment 8

[PikeUK]

*** Bug 284424 has been marked as a duplicate of this bug. ***

Comment 9

[gratou]

(In reply to comment #1)
> Use the HTML 4.0 'disabled' attribute instead for disabling form elements:

This is not only about form elements. <A anchors are also concerned.

Comment 10

[mattias.waldau]

The new webform 2 standard has decided to skip controls with negative tabindex:

http://whatwg.org/specs/web-apps/current-work/#negative-tabindex

Comment 11

[Martijn Wargers (dead)]

So this has not become invalid, right?
And it seems that in current Mozilla builds, this is worksforme, regarding tabbing at least.