[Webkit-unassigned] [Bug 130910] New: width: fit-content fails to adjust for height resizing of content that keeps aspect ratio

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=130910

           Summary: width: fit-content fails to adjust for height resizing
                    of content that keeps aspect ratio
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Unspecified
        OS/Version: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: CSS
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: bugmenot at mailinator.com


Created an attachment (id=228078)
 --> (https://bugs.webkit.org/attachment.cgi?id=228078&action=review)
testcase - red must not be visible to pass the test

When the aspect ratio of content such as an image is preserved and the height is changed via CSS animations, transitions or drag resizing, -webkit-fit-content on the parent element doesn't update to widen or narrow the width of the parent to match the new content width.

In the attached testcase the red background becomes visible in the top circle with preserved aspect ratio. The bottom circle without aspect ratio kept behaves as expected.
I've run the testcase in Gecko browsers and both circles behave correctly.

I tested width: intrinsic instead but that also failed in webkit similarly to fit-content

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