<!DOCTYPE html>
<html dir="ltr" lang="en">
<head>
  <meta charset="utf-8">
  <title>Jakes Stencil App</title>

  <meta name="viewport" content="width=device-width, initial-scale=1.0, minimum-scale=1.0, maximum-scale=5.0">
  <meta name="theme-color" content="#16161d">
  <meta name="apple-mobile-web-app-capable" content="yes">

  <script src="build/app.js"></script>

  <link rel="apple-touch-icon" href="assets/icon/icon.png">
  <link rel="icon" type="image/x-icon" href="assets/icon/favicon.ico">
  <link rel="manifest" href="manifest.json">
</head>
<body>

  <p>- - -</p>
  <p>- - -</p>
  <my-name first="Jake" last="The Snake"></my-name>
  <img src="assets/icon/icon.png" width="256px" />

  <script>
    if ('serviceWorker' in navigator && location.protocol !== 'file:') {
      // auto-unregister service worker during dev mode
      navigator.serviceWorker.ready.then(registration => {
        registration.unregister().then(() => {
          location.reload(true);
        });
      });
    }
  </script>

</body>
</html>

<!DOCTYPE html>
<html dir="ltr" lang="en">
<head>
  <meta charset="utf-8">
  <title>Jakes Stencil App</title>

  <meta name="viewport" content="width=device-width, initial-scale=1.0, minimum-scale=1.0, maximum-scale=5.0">
  <meta name="theme-color" content="#16161d">
  <meta name="apple-mobile-web-app-capable" content="yes">

  <script src="build/app.js"></script>

  <link rel="apple-touch-icon" href="assets/icon/icon.png">
  <link rel="icon" type="image/x-icon" href="assets/icon/favicon.ico">
  <link rel="manifest" href="manifest.json">
</head>
<body>

  <p>- - -</p>
  <p>- - -</p>
  <my-name first="Jake" last="The Snake"></my-name>
  <img src="assets/icon/icon.png" width="256px" />

  <!--<script>
    if ('serviceWorker' in navigator && location.protocol !== 'file:') {
      // auto-unregister service worker during dev mode
      navigator.serviceWorker.ready.then(registration => {
        registration.unregister().then(() => {
          location.reload(true);
        });
      });
    }
  </script>-->

</body>
</html>

Comment out service worker unregister script
Comment out service worker unregister script