[Webkit-unassigned] [Bug 260425] New: Unexpected behavior with the `quotes` property when custom properties are applied to pseudo-elements

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=260425

            Bug ID: 260425
           Summary: Unexpected behavior with the `quotes` property when
                    custom properties are applied to pseudo-elements
           Product: WebKit
           Version: Safari 16
          Hardware: Mac (Apple Silicon)
                OS: macOS 13
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: CSS
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: yuhei.yasuda1003 at gmail.com

Created attachment 467339

  --> https://bugs.webkit.org/attachment.cgi?id=467339&action=review

For none, the open quote is hidden and the close quote is ”; for string, the open quote has a custom value applied but the close quote is ”

When using either `none` or a string for the `quotes` property, and if custom properties are applied to pseudo-elements, the result is the same as if `auto` was specified for the `quotes` property.

span {
  quotes: "«" "»";
}

span::before {
  content: open-quote;
}

span::after {
  --x: ; /* this line reverts the quote */
  content: close-quote;
}

Demo: https://codepen.io/yuheiy/pen/oNJNQzw

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