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<!DOCTYPE html>
<title>Document#fullscreenElement</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="/fullscreen/trusted-click.js"></script>
<section id="old_parent">
<div id="item"></div>
</section>
<section id="new_parent">
<div id="item"></div>
</section>
<script>
promise_test(async function (t) {
const item = document.querySelector("#item");
await trusted_click();
assert_equals(
document.fullscreenElement,
null,
"fullscreenElement before requestFullscreen()"
);
await item.requestFullscreen();
assert_equals(
document.fullscreenElement,
item,
"fullscreenElement before moveBefore()"
);
document.querySelector("#new_parent").moveBefore(item, null);
assert_equals(
document.fullscreenElement,
item,
"fullscreenElement after moveBefore()"
);
await Promise.all([document.exitFullscreen(), fullScreenChange()]);
assert_equals(
document.fullscreenElement,
null,
"fullscreenElement after exiting fullscreen"
);
});
</script>
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