<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML//EN">
<html>
<head>
<script src="../../resources/js-test-pre.js"></script>
</head>
<body>
<script>
description('The connected subframe counter should not overflow and make `disconnectSubframes` leave active subframes in a detached DOM node.');

const FRAME_COUNT = 1024;

let container = document.body.appendChild(document.createElement('div'));
for (let i = 0; i < FRAME_COUNT; ++i) {
  let frame = container.appendChild(document.createElement('iframe'));
  frame.style.display = 'none';
}
container.remove();

shouldBeNull('container.firstChild.contentWindow');
</script>
<script src="../../resources/js-test-post.js"></script>
</body>
</html>