[Webkit-unassigned] [Bug 248396] New: [MQ4] Disallow negative values

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=248396

            Bug ID: 248396
           Summary: [MQ4] Disallow negative values
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: CSS
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: koivisto at iki.fi

Disallow negative values for now even though they are allowed by the spec (https://www.w3.org/TR/mediaqueries-4/#false-in-the-negative-range). The current WPTs don't yet follow this behavior and no other engine implements it. It is better enabled separately.

Also other parsing and evaluation fixes.

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