<!DOCTYPE html>
<html>
<head>
  <script src="resources/ensure-hidpi.js"></script>
  <style>
    div {
      width: 120px;
      height: 120px;
      margin: 10px 10px 10px 10px;
      border: none;
      display: inline-block;
      background-color: lime;
    }
  </style>
</head>
<body>
  <div></div>
</body>
</html>