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<!--
Any copyright is dedicated to the Public Domain.
-->
<!DOCTYPE HTML>
<html>
<head>
<title>Test for SharedWorker in 3rd Party Iframes</title>
</head>
<body>
<script>
let url = new URL(window.location);
let frame = document.createElement('iframe');
frame.src =
document.body.appendChild(frame);
window.addEventListener('message', evt => {
frame.remove();
opener.postMessage(evt.data, "*");
}, {once: true});
</script>
</body>
</html>