HTML Code

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <title>Pointer lock inspect</title>
  <style>
    body { font-family: system-ui, sans-serif; margin: 1rem; }
    #canvas { width: 320px; height: 180px; background: #312e81; color: #fff; display: grid; place-items: center; border-radius: 8px; cursor: crosshair; }
  </style>
</head>
<body>
  <div id="canvas">Click to lock pointer</div>
  <pre id="out">No locked element (click canvas to test)</pre>
  <script>
    const canvas = document.getElementById("canvas");
    function report() {
      const el = document.pointerLockElement;
      document.getElementById("out").textContent = el
        ? "Locked element: " + el.nodeName + " id=" + (el.id || "(none)")
        : "No locked element (press Esc to unlock)";
    }
    canvas.addEventListener("click", () => {
      canvas.requestPointerLock().catch(console.error);
    });
    document.addEventListener("pointerlockchange", report);
    report();
  </script>
</body>
</html>

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pointerLockElement — inspect element (Try It)