[Webkit-unassigned] [Bug 252536] New: Regression: CSS opacity doesn't work on dialog::backdrop

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=252536

            Bug ID: 252536
           Summary: Regression: CSS opacity doesn't work on
                    dialog::backdrop
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: iPhone / iPad
                OS: iOS 16
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: New Bugs
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: martiminchev at gmail.com

Since iOS 16.4 Beta 1, using the `opacity` CSS attribute together with a `background` on `dialog::backdrop` no longer works. Instead, there is always no transparency.

See this demo: https://jsfiddle.net/marto55555/yktr52hw/

Expected behavior: When the dialog is open, the button in the background should be slightly visible.

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