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<!DOCTYPE html>
<title>Element#requestFullscreen() for dialog element</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/resources/testdriver.js"></script>
<script src="/resources/testdriver-vendor.js"></script>
<div id="log"></div>
<dialog></dialog>
<script>
promise_test(async (t) => {
const dialog = document.querySelector("dialog");
assert_true(dialog instanceof HTMLDialogElement);
document.onfullscreenchange = t.unreached_func(
"fullscreenchange event"
);
const errorEventPromise = new Promise(
(resolve) => (document.onfullscreenerror = resolve)
);
Promise.all([
promise_rejects_js(t, TypeError, dialog.requestFullscreen()),
errorEventPromise,
]);
});
</script>
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