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<!DOCTYPE html>
<title>Document#onfullscreenerror</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<div id="log"></div>
<script>
promise_test(async (t) => {
assert_equals(
document.onfullscreenerror,
null,
"initial onfullscreenerror"
);
const [, event] = await Promise.all([
promise_rejects_js(
t,
TypeError,
document.documentElement.requestFullscreen()
),
new Promise((r) => document.addEventListener("fullscreenerror", r)),
]);
assert_equals(event.target, document.documentElement);
assert_true(event instanceof Event);
}, "Checks that the fullscreenerror event is fired when entering fullscreen fails");
</script>
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