<!DOCTYPE html>
<html>
<body>
<a id="href" href="simple.html">download</a>
<script>
    var element = document.getElementById("href");
    var data = "fake data";
    var blob = new Blob([data], {type: "model/vnd.usdz+zip"});
    var url = window.URL.createObjectURL(blob);

    element.href = url;
    element.click();
</script>
</body>
</html>