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<!DOCTYPE html>
<title>Remove the first element on the fullscreen element stack</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>
<div id="first">
<div id="last"></div>
</div>
<script>
promise_test(async (t) => {
t.add_cleanup(() => {
if (document.fullscreenElement) {
return document.exitFullscreen();
}
});
const first = document.getElementById("first");
const [, firstEvent] = await Promise.all([
trusted_request(first),
fullScreenChange(),
]);
assert_equals(document.fullscreenElement, first, "fullscreen element after first request");
assert_equals(firstEvent.target, first, "first fullscreenchange event target");
const last = document.getElementById("last");
const [, secondEvent] = await Promise.all([
trusted_request(last),
fullScreenChange(),
]);
assert_equals(document.fullscreenElement, last, "fullscreen element after second request");
assert_equals(secondEvent.target, last, "second fullscreenchange event target");
first.remove();
// Both /first/ and /last/ were removed from the top layer and
// thus the fullscreen element synchronously becomes null.
assert_equals(document.fullscreenElement, null, "fullscreen element immediately after removal");
const thirdEvent = await fullScreenChange();
assert_equals(document.fullscreenElement, null, "fullscreen element after third event");
assert_equals(thirdEvent.target, document, "third fullscreenchange event target");
});
</script>
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