<html>
<head></head>
<body>
  <div style="touch-action:auto; width:100px; height:100px;background-color:red; overflow: scroll">
    This div prohibits pinch-zoom.
    <div style="width: 120px; height: 500px; background-color: black">Scrollable content!</div>
  </div>
</body>
</html>