[Webkit-unassigned] [Bug 86896] New: background elements render poorly below foreground content

Fri May 18 13:52:50 PDT 2012

https://bugs.webkit.org/show_bug.cgi?id=86896

           Summary: background elements render poorly below foreground
                    content
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Unspecified
               URL: http://letmespellitoutforyou.com/t/
        OS/Version: Unspecified
            Status: UNCONFIRMED
          Severity: Normal
          Priority: P2
         Component: Layout and Rendering
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: mike.sierra at nokia.com

Steps:

#1. Go to URL

#2. Open _bkPos and _bkPosXtra in new tabs

#3. Scroll to bottom of _bkPos page

#4. Choose last item in list; observe

#5. Choose 2nd-last item; observe

#6. Choose 3rd-last item; observe

#7. Go to _bkPosXtra tab

#8. Repeat #3-#6

#9. Go back to _bkPos tab; observe

Bug: Initial steps #4-#6 display various rendering artifacts for
background elements that drop below bottom-most rendering foreground
content.  Click handler modifies background CSS properties on <body>
element.  Overall list has generous margin-bottom space, within which
area the rendering bugs appear.

The second page fixes the problem by placing an extra element at the
very bottom of the page.

Note that at #9, navigating back to the original page causes any
rendering artifact to disappear.

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