HTML Code

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title>touchmove drag</title>
  <style>
    #pad {
      width: 280px; height: 180px; border: 2px solid #333;
      touch-action: none; background: #f0f0f0; position: relative;
    }
    #dot {
      width: 24px; height: 24px; border-radius: 50%; background: #06c;
      position: absolute; left: 20px; top: 20px;
      transform: translate(-50%, -50%); pointer-events: none;
    }
  </style>
</head>
<body>
  <div id="pad"><div id="dot"></div></div>
  <p>Drag on the pad</p>
  <script>
    var pad = document.getElementById("pad");
    var dot = document.getElementById("dot");
    function moveDot(clientX, clientY) {
      var r = pad.getBoundingClientRect();
      dot.style.left = (clientX - r.left) + "px";
      dot.style.top = (clientY - r.top) + "px";
    }
    pad.addEventListener("touchmove", function (event) {
      var t = event.changedTouches[0];
      if (t) moveDot(t.clientX, t.clientY);
    }, { passive: true });
    pad.addEventListener("mousemove", function (event) {
      if (event.buttons === 1) moveDot(event.clientX, event.clientY);
    });
  </script>
</body>
</html>

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Element touchmove — drag a dot (Try It)