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<!DOCTYPE html>
<title>Move the fullscreen element to another document</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="../trusted-click.js"></script>
<div></div>
<iframe></iframe>
<script>
async_test(t => {
t.add_cleanup(() => {
Promise.resolve(document.exitFullscreen()).catch(() => {});
});
const div = document.querySelector("div");
const iframe = document.querySelector("iframe");
document.onfullscreenchange = t.step_func(event => {
assert_equals(document.fullscreenElement, div);
assert_equals(event.target, div);
assert_equals(div.ownerDocument, document);
iframe.contentDocument.body.appendChild(div);
assert_not_equals(div.ownerDocument, document);
// Moving /div/ removes it from the top layer and thus the fullscreen
// element synchronously becomes null.
assert_equals(document.fullscreenElement, null);
div.onfullscreenchange = t.unreached_func("fullscreenchange fired on element");
iframe.contentDocument.onfullscreenchange = t.unreached_func("fullscreenchange fired on other document");
document.onfullscreenchange = t.step_func_done(event => {
assert_equals(document.fullscreenElement, null);
assert_equals(event.target, document);
});
});
trusted_request(t, div);
});
</script>
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