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10 lines
411 B
HTML
10 lines
411 B
HTML
<!DOCTYPE html>
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<script src="/resources/testharness.js"></script>
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<script src="/resources/testharnessreport.js"></script>
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<script>
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promise_test(async t => {
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assert_implements("HTMLPortalElement" in self);
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let activatePromise = document.createElement('portal').activate();
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await promise_rejects_dom(t, 'InvalidStateError', activatePromise);
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}, "A portal with nothing in it cannot be activated");
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</script>
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