index.html

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <meta http-equiv="X-UA-Compatible" content="ie=edge">
  <title>Web Bluetooth Playground</title>
  <link rel="stylesheet" href="./styles.css">
  <script defer src="./main.js"></script>
</head>
<body>
  <button id="requestAllDevices" class="btn-request">&#128269;</button>
</body>
</html>