16 lines
807 B
HTML
16 lines
807 B
HTML
<!doctype html>
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<title>CSS Test: :host in DOM APIs</title>
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<script src="/resources/testharness.js"></script>
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<script src="/resources/testharnessreport.js"></script>
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<link rel="author" title="Emilio Cobos Álvarez" href="mailto:emilio@crisal.io">
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<link rel="help" href="https://drafts.csswg.org/css-scoping/#host-selector">
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<div id="host"></div>
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<script>
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test(function() {
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let root = host.attachShadow({ mode: "open" });
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root.innerHTML = `<div></div>`;
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assert_false(host.matches(":host"), ":host shouldn't match from CSSOM from outside the shadow tree");
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assert_true(root.firstElementChild.matches(":host div"), ":host should match from within the shadow tree");
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assert_equals(root.querySelector(":host div"), root.firstElementChild, ":host should match from within the shadow tree");
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})
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</script>
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