index.html

<!DOCTYPE html>
<html>

<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>MyApp</title>
  <style>
    #bar {
      -webkit-app-region: drag;
      height: 30px;
      width: 100%;
    }
    pear-ctrl[data-platform=darwin] {
      padding: 12px;
    }
  </style>
</head>

<body>
  <div id="bar"><pear-ctrl></pear-ctrl></div>
  <div id="app"></div>
  <script type="module" src="./build/src/index.js" defer></script>
</body>

</html>