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

... another way to do this is to define this relationship in CSS.
So the element itself would be a standard HTML element, and the relationship to the pseudo-element be entirely in CSS:
```css
dialog {
  div.backdrop { display: pseudo(::backdrop) } 
}
```

or using name-matching when it's not a direct child:
```css
::view-transition-group(hero-anim) { pseudo-name: hero-anim; }
.hero-animation { display: pseudo(hero-anim); }
```

... and utilities for deciphering which pseudo-element received an events etc. can be added to CSSOM or wherever is needed.

This can probably be improved a lot for ergonomics, but the point is that this can probably be done without the DOM knowing about it at all, and using the `display` property indicates that this proxying replaces actual rendering/layout of the element.

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Received on Thursday, 14 August 2025 19:47:16 UTC