chromium/third_party/blink/renderer/core/testing/data/touch-event-handler-both.html

<!DOCTYPE html>
<html>
<head>
  <script type="text/javascript">
      window.addEventListener('touchstart', function(event) {
      }, {passive: true} );
      window.addEventListener('touchstart', function(event) {
      }, {passive: false} );
  </script>
</head>

</html>