index.html

<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8" />
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title>spammy.permission.site</title>
  <link rel="stylesheet" href="style.css">
  <script src="index.js"></script>
</head>
<body>
  <div class="content">
    This is a testing domain that is classified by client-side preload data as one that is known to have an acceptable notification permission request flow.
  </div>
  <div class="content">
    <button id="notifications">Notifications</button>
  </div>
</body>
</html>