[Webkit-unassigned] [Bug 11386] New: CSS: :only-child, :only-of-type is applied to all first children

[bugzilla-daemon at webkit.org]

http://bugs.webkit.org/show_bug.cgi?id=11386

           Summary: CSS: :only-child, :only-of-type is applied to all first
                    children
           Product: WebKit
           Version: 420+ (nightly)
          Platform: Macintosh
               URL: http://www.css3.info/selectors-test/
        OS/Version: Mac OS X 10.4
            Status: UNCONFIRMED
          Severity: Normal
          Priority: P2
         Component: CSS
        AssignedTo: webkit-unassigned at opendarwin.org
        ReportedBy: niels.leenheer at gmail.com


Current behavoir:
The :only-child matches every first child and the :only-of-type selector
matches every first child of a new type.

Reason:
The reason for this is that every time a new element is added to the DOM, it is
checked to see if it matches one of the CSS selectors. Because the DOM is build
one element at a time, every first child is at least for a moment the only
child. The same applies to the first element of a certain type. It is at least
for a moment the only of that type. 

Proper behavoir:
The :only-child selector should only match elements that are *really* the only
child. The :only-of-type selector should only match elements that are *really*
the only child of a certain type. Once an element is no longer the only, or the
only of a certain type, it should no longer match these selectors.


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