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16 lines
669 B
HTML
16 lines
669 B
HTML
<!DOCTYPE html>
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<title>HTMLUnknownElement</title>
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<link rel="author" title="Ms2ger" href="mailto:ms2ger@gmail.com">
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<link rel="help" href="https://html.spec.whatwg.org/multipage/#htmlunknownelement">
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<script src="/resources/testharness.js"></script>
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<script src="/resources/testharnessreport.js"></script>
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<div id="log"></div>
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<script>
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test(function() {
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var elt = document.createElement("xxx");
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assert_true(window.HTMLUnknownElement && elt instanceof HTMLUnknownElement,
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"not an instance of HTMLUnknownElement");
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assert_true(window.HTMLSpanElement && !(elt instanceof HTMLSpanElement),
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"an instance of HTMLSpanElement");
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});
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</script>
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