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<!DOCTYPE html>
<title>Document#exitFullscreen() for nested fullscreen inside an iframe</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>
<iframe allowfullscreen></iframe>
<script>
promise_test(async (t) => {
const iframe = document.querySelector("iframe");
await new Promise((resolve) => {
iframe.onload = resolve;
iframe.srcdoc = "<div id='outer'><div id='inner'></div></div>";
});
const iframeDoc = iframe.contentDocument;
const outer = iframeDoc.getElementById("outer");
const inner = iframeDoc.getElementById("inner");
// First request fullscreen for the outer element.
await Promise.all([fullScreenChange(), trusted_request(outer)]);
assert_equals(document.fullscreenElement, iframe);
assert_equals(iframeDoc.fullscreenElement, outer);
// Then request fullscreen for the inner element.
await Promise.all([fullScreenChange(), trusted_request(inner)]);
assert_equals(document.fullscreenElement, iframe);
assert_equals(iframeDoc.fullscreenElement, inner);
// Now exit fullscreen for the iframe's content document.
await Promise.all([fullScreenChange(), iframeDoc.exitFullscreen()]);
assert_equals(document.fullscreenElement, null);
assert_equals(iframeDoc.fullscreenElement, null);
}, "Exit fullscreen for nested fullscreen inside an iframe");
</script>
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