Re: [csswg-drafts] [css-pseudo-4] Proxying pseudo-elements as "real" (`<slot>`) elements (#12575)

• From: Rune Lillesveen via GitHub <noreply@w3.org>
• Date: Wed, 13 Aug 2025 08:14:24 +0000
• To: public-css-archive@w3.org
• Message-ID: <issue_comment.created-3182689107-1755072862-noreply@w3.org>

I'm also skeptical to re-using `<slot>`. Even if you introduce a new attribute, for instance `pseudo`, there is an interaction issue with shadow dom slotting if the pseudo element is in a shadow tree:

```html
<div id="host">
  <template shadowrootmode="open">
    <menu>
      <slot pseudo="::before"></slot> <!-- Is this the default slot for the <div>Slotted</div> below? -->
    </menu>
  </template>
  <div>Slotted</div>
</div>
```


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Received on Wednesday, 13 August 2025 08:14:25 UTC