HTML Code

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <title>raw fallback</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">(choosing path…)</pre>
  <script>
    var stage = document.getElementById("stage");
    var out = document.getElementById("out");
    var canUseRaw =
      window.isSecureContext && ("onpointerrawupdate" in window);
    function onUpdate(event, label) {
      out.textContent = label + " @" + event.clientX + "," + event.clientY;
    }
    if (canUseRaw) {
      stage.addEventListener("pointerrawupdate", function (e) {
        onUpdate(e, "raw");
      });
      out.textContent = "using pointerrawupdate";
    } else {
      stage.addEventListener("pointermove", function (e) {
        onUpdate(e, "move-fallback");
      });
      out.textContent = "using pointermove fallback";
    }
  </script>
</body>
</html>

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Element pointerrawupdate — secure + fallback (Try It)