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<!DOCTYPE html>
<title>Document#onfullscreenchange</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>
<script src="../trusted-click.js"></script>
<div id="log"></div>
<script>
promise_test(async (t) => {
const div = document.querySelector("div");
assert_equals(
document.onfullscreenchange,
null,
"initial onfullscreenchange"
);
const [, event] = await Promise.all([
trusted_request(div),
new Promise((r) =>
document.addEventListener("fullscreenchange", r)
),
]);
assert_true(event instanceof Event);
assert_equals(event.target, div);
}, "Checks that the fullscreenchange event is fired when entering fullscreen");
</script>
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