HTML Code

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <title>movementY — log</title>
</head>
<body>
  <p id="log">Move your mouse around.</p>
  <script>
    var log = document.getElementById("log");
    function logMovement(event) {
      log.innerText =
        "movement: " + event.movementX + ", " + event.movementY + "\n" + log.innerText;
    }
    document.addEventListener("mousemove", logMovement);
  </script>
</body>
</html>

Lines: 0 | Characters: 0

Live Preview Auto-refresh on Run

MouseEvent.movementY — mousemove log (Try It)