On Mon, Jan 13, 2025 at 7:38 PM Keith Cirkel <[email protected]>
wrote:
> > I don't see that the spec says anything about querySelector, but its
> evaluation depends on slot assignments. Should dirty slot assignments be
> updated before running querySelector?
>
> Thanks Rune, I think you're right, we should definitely fix this so it is
> not observable.
>
FWIW, the slot assignments are made up-to-date for querySelector with
:dir() and auto directionality (tested with Chrome and Firefox), but I
cannot find anything in the spec calling this out specifically:
<!DOCTYPE html>
<div id="host">
<template shadowrootmode="open">
<style>
slot:dir(rtl) { background-color: green; }
</style>
<slot dir="auto"></slot>
</template>
<div id="auto_div" slot="no">‏</div>
</div>
<script>
const root = host.shadowRoot;
const slot = root.querySelector("slot");
console.log(root.querySelector("slot:dir(rtl)"));
console.log(getComputedStyle(slot).backgroundColor);
auto_div.removeAttribute("slot");
console.log(root.querySelector("slot:dir(rtl)"));
console.log(getComputedStyle(host.shadowRoot.querySelector("slot")).backgroundColor);
</script>
> > Looking at wpt.fyi all tests are tentative, so they need to be made
> non-tentative with proper spec references if they match the spec.
>
> Thanks for mentioning this, I've got a PR for this:
> https://github.com/web-platform-tests/wpt/pull/50056
>
Remember to also update the rel=help links to actual spec references.
--
Rune Lillesveen
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