HTML Code

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <title>pointermove coords</title>
  <style>
    #stage {
      height: 140px; border: 2px solid #333; display: grid; place-items: center;
      user-select: none; touch-action: none;
    }
  </style>
</head>
<body>
  <div id="stage">Move pointer here</div>
  <pre id="out">x=? y=? moves=0</pre>
  <script>
    var stage = document.getElementById("stage");
    var out = document.getElementById("out");
    var count = 0;
    stage.addEventListener("pointermove", function (event) {
      count++;
      out.textContent =
        "x=" + event.clientX +
        " y=" + event.clientY +
        " moves=" + count;
    });
  </script>
</body>
</html>

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Element pointermove — live coordinates (Try It)