173270 - null always returned by getAttribute("checked") on <INPUT> button or checkbox

Status: RESOLVED DUPLICATE of bug 108480

(Core :: DOM: Events, defect)

Description

[Leland M. George]

User-Agent:       Mozilla/5.0 (Windows; U; Win 9x 4.90; en-US; rv:1.2b) Gecko/20021007
Build Identifier: Mozilla/5.0 (Windows; U; Win 9x 4.90; en-US; rv:1.2b) Gecko/20021007

controlName.checked returns correct true/false value, while
controlName.getAttribute("checked") always returns null.

Reproducible: Always

Steps to Reproduce:
1. Open attachment
2 [review]. Operate checkbox/radio button controls
3. Observe values in alert box

Actual Results:  
As described at top.

Expected Results:  
According to the Dom 2 specification, the "Return Value [of getAttribute must be
the] Attr value as a string, or the empty string if that attribute does not have
a specified or default value."  (See
http://www.w3.org/TR/2000/REC-DOM-Level-2-Core-20001113/core.html#ID-745549614.)

Therefore, if the control is checked (controlName.checked reports true),
controlName.getAttribute("checked") must return the string "checked"; otherwise,
it must return the empty string "". 

This may belong under the Dom Core or HTML Form Control component.  However,
since it appears to relate to bug 173244 and bug 173255, and the same attachment
reveals all three, I submit it here under DOM Events.

Search for duplicates:
Failed using string "input event" (criterion: "contains all words..."), turning
up related but distinct bug 97058 and bug 111992.  See my remarks on bug 173244
and bug 173255.

Search also failed using "radio checked" and "checkbox checked" (same
criterion), turning up two others that might be related, though neither of these
seems very likely to be.  Of the two, bug 159617 seems more likely to relate
than 150936, which according to John Keiser's comment #4
(http://bugzilla.mozilla.org/show_bug.cgi?id=150936#c4) may dup bug 14445,
already resolved.

Comment 1

[Leland M. George]

Attachment: Alert box shows incorrect value returned as described.

Comment 2

[Bob Clary [:bc] (inactive)]

setting the presentation value of a form control does not change the source of
the element. This means that if the checked attribute is not set on the control
it will not be returned by getAttribute. The return value of null instead of ''
is a dupe of bug 108480

*** This bug has been marked as a duplicate of 108480 ***

Comment 3

[Leland M. George]

Comment on attachment 102166 [details]
Alert box shows incorrect value returned as described.

See bug 173244 and bug 173255.