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<!doctype html>
<meta charset="utf-8" />
<title>CSS Selectors: part pseudo selectors</title>
<link rel="help" href="https://drafts.csswg.org/css-shadow-parts/#part" />
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/css/support/parsing-testcommon.js"></script>
<script>
test_valid_selector("::part(--foo)");
test_valid_selector("::part(bar)");
test_valid_selector("::part(--)");
test_valid_selector("::part(--0)");
test_valid_selector("::part(foo bar)");
test_valid_selector("::part(-foo bar)");
test_valid_selector("::part(foo):focus");
test_valid_selector("::part(foo):hover");
test_valid_selector("::part(foo):focus-within");
test_valid_selector("::part(foo)::before");
test_valid_selector("::part(foo)::after");
test_valid_selector("::part(foo)::placeholder");
test_valid_selector("::part(foo)::first-line");
test_valid_selector("::part(foo)::first-letter");
test_valid_selector("::part(foo)::file-selector-button");
test_valid_selector("::part(foo):is(:focus)");
test_valid_selector(":lang(en)::part(foo)");
test_valid_selector(":dir(ltr)::part(foo)");
test_valid_selector("::part(foo):lang(en)");
test_valid_selector("::part(foo):dir(ltr)");
test_valid_selector("::part(foo):disabled");
test_valid_selector("::part(foo):checked");
test_invalid_selector(":part()");
test_invalid_selector(":part(0)");
test_invalid_selector(":part('foo')");
test_invalid_selector(":part([foo])");
test_invalid_selector('::part(foo) + ::part(bar)');
// Note: the serialization behavior of the following is as resolved in
// https://github.com/w3c/csswg-drafts/issues/8356 but it has not yet been
// specified.
test_valid_forgiving_selector("::part(foo):is(ul)");
test_valid_forgiving_selector("::part(foo):is(nav ul)");
test_valid_forgiving_selector("::part(foo):where(ul)");
test_valid_forgiving_selector("::part(foo):where(nav ul)");
test_invalid_selector("::part(foo):has(li)");
</script>
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