<script src="include.js"></script>
<script>
    asyncTest(done => {
        globalThis.done = done;

        let link = document.createElement("link");
        link.setAttribute("rel", "preload");
        link.setAttribute("href", "valid.css");
        link.setAttribute("as", "style");
        link.setAttribute("onload", "println('link element onload'); done();");
        document.head.appendChild(link);
    });
</script>