const app = function () {
  function init() {
    console.log('init ready');
  }
  return {
    init: init
  }
}();



index

<!doctype html>
<html>

<head>
  <title>JavaScript BlackJack Game</title>
</head>

<body>
  <div id="game"></div>
  <script src="script.js"></script>
  <script>
  document.addEventListener('DOMContentLoaded',app.init)
  
  </script>
</body>

</html>