[Webkit-unassigned] [Bug 111585] New: [CSS Regions] The presence of a flow-from declaration in a CSS rule using :hover effectively disables the rule

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=111585

           Summary: [CSS Regions] The presence of a flow-from declaration
                    in a CSS rule using :hover effectively disables the
                    rule
           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: mibalan at adobe.com
                CC: WebkitBugTracker at adobe.com
            Blocks: 57312


If a CSS rule that uses the :hover pseudo-class tries to change the value of the flow-from property, that rule seems to be effectively ignored. Removing the flow-from declaration from the rule lets all other property changes to apply.

In the attached test-case, try moving the mouse over the green square.

EXPECTED: the green square should turn red (border color changes) and the black square should turn green (content is not flowed anymore and background color - green - is revealed)

ACTUAL: nothing happens

If the -webkit-flow-from: none; declaration is dropped from the #region:hover rule, the green square will turn red (border color changes).

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