<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <title>JavaScript</title>
  <script>
    async function getMessage() {
      // Asynchronous task goes here
      return "Hello!";
    }
    async function show() {
      const message = await getMessage();
      console.log(message);
    }
    function initiate() {
      const button = document.getElementById("button");
      button.addEventListener("click", show);
    }
    window.addEventListener("DOMContentLoaded", initiate);
  </script>
</head>
<body>
  <section>
    <button type="button" id="button">Run Task</button>
  </section>
</body>
</html>