<html>
<body>
<script>
var scope = "/appcache/resources";
var script = "/appcache/service-worker-proxy.js";

async function registerServiceWorker()
{
    var registration = await navigator.serviceWorker.register(script, { scope : scope });
    await new Promise(resolve => {
        if (registration.active)
            resolve(registration);
        worker = registration.installing;
        worker.addEventListener("statechange", () => {
            if (worker.state === "activated")
                resolve(registration);
        });
    });
}
</script>
</body>
</html>