<!DOCTYPE html>
<html>
<head>
  <script type="text/javascript">
    // Demonstrates how the navigator.serviceWorker api can be used
    const serviceWorker = navigator.serviceWorker;
    serviceWorker.register().then(registration => {
        console.log("success!");
    }, err => {
        console.error("Installing the worker failed!", err);
    });
  </script>
</head>

<body>
</body>
</html>