<!DOCTYPE html>
<html>
<head>
<title>Contains a nested (hopefully OOPIF) iframe</title>
</head>
<body>
<script>
document.body.onload = () => {
let iframe = document.getElementsByTagName('iframe')[0];
pathname = window.location.pathname.replace('cross_domain_iframe', 'outer');
iframe.src = (window.location.protocol + '//' + 'localhost' +
':' + window.location.port + pathname);
}
</script>
<p><a href="#one">One</a></p>
<iframe>
</body>
</html>