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<!DOCTYPE html>
<title>Document#exitFullscreen() called 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 once = { once: true };
const div = document.querySelector("div");
document.onfullscreenerror = t.unreached_func("fullscreenerror event");
await Promise.all([
fullScreenChange(),
trusted_request(div),
]);
// We are now in fullscreen.
assert_equals(document.fullscreenElement, div);
// Exit fullscreen twice.
const firstPromise = document.exitFullscreen();
assert_equals(
document.fullscreenElement,
div,
"fullscreenElement after first exitFullscreen()"
);
const secondPromise = document.exitFullscreen();
assert_equals(
document.fullscreenElement,
div,
"fullscreenElement after second exitFullscreen()"
);
const eventChange = new Promise((resolve) => {
document.addEventListener("fullscreenchange", () => {
document.addEventListener("fullscreenchange", t.unreached_func("second event fired"), once);
resolve();
}, once);
});
await Promise.all([
fullScreenChange,
firstPromise,
secondPromise,
eventChange,
]);
assert_equals(document.fullscreenElement, null);
});
</script>
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