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<!DOCTYPE html>
<title>Element#requestFullscreen() on the current fullscreen element</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="target"></div>
<script>
promise_test(async (t) => {
const target = document.getElementById("target");
document.onfullscreenerror = t.unreached_func("fullscreenerror event");
await Promise.all([
fullScreenChange(),
trusted_request(target),
]);
assert_equals(document.fullscreenElement, target);
// The next requestFullscreen() should fire no events due to "If element is
// doc's fullscreen element, terminate these subsubsteps."
document.onfullscreenchange = t.unreached_func(
"fullscreenchange event"
);
await trusted_click(target);
await target.requestFullscreen();
assert_equals(document.fullscreenElement, target);
// Wait until after the next animation frame.
await new Promise((r) => requestAnimationFrame(r));
}, "Element#requestFullscreen() on the current fullscreen element");
</script>
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