Re: [csswg-drafts] [css-values] attr() and part() / slotted() / element backed pseudo-elements behave inconsistently. (#12721)

• From: Rune Lillesveen via GitHub <noreply@w3.org>
• Date: Wed, 03 Sep 2025 11:15:49 +0000
• To: public-css-archive@w3.org
• Message-ID: <issue_comment.created-3248807801-1756898147-noreply@w3.org>

For `::slotted([foo]) { width: attr(foo, px) }`, I would be surprised if the `attr()` looked up the originating element.

I can see the leakage issue with `::part()`.

When the spec reads "if applied to a pseudo-element", does that mean that it depends on the selector being used, not what the actual backing is?


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Received on Wednesday, 3 September 2025 11:15:50 UTC