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<!DOCTYPE html>
<title>Element#requestFullscreen() twice</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");
await trusted_click(document.body);
const p = div.requestFullscreen();
assert_equals(
document.fullscreenElement,
null,
"fullscreenElement after first requestFullscreen()"
);
const rejectedPromises = [
promise_rejects_js(t, TypeError, div.requestFullscreen()),
promise_rejects_js(t, TypeError, div.requestFullscreen()),
];
await Promise.all([p, fullScreenChange()]);
assert_equals(
document.fullscreenElement,
div,
"fullscreenElement after entering fullscreen"
);
// Ensure that there's are not more changes fullscreenchange event.
document.onfullscreenchange = t.unreached_func(
"second fullscreenchange event"
);
await Promise.all(rejectedPromises);
await new Promise((r) => requestAnimationFrame(r));
}, "requestFullscreen() multiple times after going fullscreen");
</script>
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