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21 lines
981 B
HTML
21 lines
981 B
HTML
<!DOCTYPE html>
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<title>:fullscreen pseudo-class support</title>
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<link rel="help" href="https://fullscreen.spec.whatwg.org/#:fullscreen-pseudo-class">
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<link rel="help" href="https://dom.spec.whatwg.org/#dom-element-matches">
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<link rel="help" href="https://dom.spec.whatwg.org/#dom-parentnode-queryselector">
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<script src="/resources/testharness.js"></script>
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<script src="/resources/testharnessreport.js"></script>
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<body>
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<script>
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// This is a separate test so that support for :fullscreen can be detected
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// without actually going fullscreen. If it were not supported, then this test
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// would fail.
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test(t => {
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// precondition is to throw for unknown pseudo-classes:
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assert_throws_dom("SyntaxError", () => document.body.matches(':halfscreen'));
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assert_throws_dom("SyntaxError", () => document.querySelector(':halfscreen'));
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// the actual test:
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assert_false(document.body.matches(':fullscreen'));
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assert_equals(document.querySelector(':fullscreen'), null);
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});
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</script>
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