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LibWeb/CSS: Parse the ::slotted pseudo-element

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This commit is contained in:
Shannon Booth
2025-07-12 16:15:06 +12:00
committed by Sam Atkins
parent 0151a088ad
commit 9054ff29f0
Notes: github-actions[bot] 2025-07-15 12:55:25 +00:00 
Author: https://github.com/shannonbooth
Commit: https://github.com/LadybirdBrowser/ladybird/commit/9054ff29f05
Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/5414
Reviewed-by: https://github.com/AtkinsSJ ✅
10 changed files with 141 additions and 21 deletions
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51
Tests/LibWeb/Text/input/wpt-import/css/css-scoping/slotted-parsing.html Normal file
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<!DOCTYPE html>
<meta charset="utf-8">
<title>CSS Scoping: ::slotted pseudo parsing</title>
<link rel="author" title="Rune Lillesveen" href="mailto:rune@opera.com">
<link rel="help" href="https://drafts.csswg.org/css-scoping/#slotted-pseudo">
<script src="../../resources/testharness.js"></script>
<script src="../../resources/testharnessreport.js"></script>
<script src="../../css/support/parsing-testcommon.js"></script>
<style id="styleElm">
</style>
<script>
test_invalid_selector("::slotted");
test_invalid_selector("::slotted()");
test_invalid_selector("::slotted(*).class");
test_invalid_selector("::slotted(*)#id {}");
test_invalid_selector("::slotted(*)[attr]");
test_invalid_selector("::slotted(*):host");
test_invalid_selector("::slotted(*):host(div)");
test_invalid_selector("::slotted(*):hover");
test_invalid_selector("::slotted(*):read-only");
test_invalid_selector("::slotted(*)::slotted(*)");
test_invalid_selector("::slotted(*)::before::slotted(*)");
test_invalid_selector("::slotted(*) span");
test_valid_selector("::slotted(*)");
test_valid_selector("::slotted(div)");
test_valid_selector("::slotted([attr]:hover)");
test_valid_selector("::slotted(:not(.a))");
test_valid_forgiving_selector("::slotted(*):is()");
test_valid_forgiving_selector("::slotted(*):is(:hover)");
test_valid_forgiving_selector("::slotted(*):is(#id)");
test_valid_forgiving_selector("::slotted(*):where()");
test_valid_forgiving_selector("::slotted(*):where(:hover)");
test_valid_forgiving_selector("::slotted(*):where(#id)");
test_valid_forgiving_selector("::slotted(*):where(::before)");
// Allow tree-abiding pseudo elements after ::slotted
test_valid_selector("::slotted(*)::before");
test_valid_selector("::slotted(*)::after");
test_valid_selector("::slotted(*)::details-content");
test_valid_selector("::slotted(*)::file-selector-button");
test_valid_selector("::slotted(*)::placeholder");
test_valid_selector("::slotted(*)::marker");
// Other pseudo elements not valid after ::slotted
test_invalid_selector("::slotted(*)::first-line");
test_invalid_selector("::slotted(*)::first-letter");
test_invalid_selector("::slotted(*)::selection");
</script>