<!DOCTYPE html>
<html>
<head>
<script src="/js-test-resources/js-test.js"></script>
</head>
<body>
<script>
description("Checks that trying to do a synchronous XHR in a beforeunload event handler is not allowed.");
jsTestIsAsync = true;

onload = () => {
    w = open("resources/sync-xhr-in-beforeunload-window.html");
    w.onload = () => {
        setTimeout(() => {
            w.close();
        }, 0);
    };
}
</script>
</body>
</html>