[Webkit-unassigned] [Bug 271136] New: [css-cascade] revert-layer does not rollback unregistered custom properties

bugzilla-daemon at webkit.org bugzilla-daemon at webkit.org
Sun Mar 17 20:34:53 PDT 2024


            Bug ID: 271136
           Summary: [css-cascade] revert-layer does not rollback
                    unregistered custom properties
           Product: WebKit
           Version: Safari 17
          Hardware: All
                OS: All
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: CSS
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: nathan at knowler.dev

Created attachment 470414

  --> https://bugs.webkit.org/attachment.cgi?id=470414&action=review

Test reduction for custom properties and revert-layer

I expect that using the `revert-layer` keyword for a custom property would roll it back to the previous layer’s specified value, however, for unregistered custom properties it seems to ignore any specified values and computes as nothing. Registered custom properties seem to work as expected whether or not they have an initial value. Chrome and Firefox both work as expected.

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