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Test Info:

<!DOCTYPE html>
<title>
Document#fullscreenEnabled when the document is not the active document
</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<div id="log"></div>
<iframe allowfullscreen></iframe>
<script>
promise_test(async (t) => {
const iframe = document.querySelector("iframe");
const documentBeforeNav = iframe.contentDocument;
await new Promise((resolve) => {
iframe.onload = resolve;
iframe.src = "/common/blank.html";
});
assert_false(documentBeforeNav.fullscreenEnabled)
});
</script>