React.js ~useState 反模式~

  const [x, setX] = useState(0);
  const [y, setY] = useState(0);

  const handlePointerMove = (e) => {
    setX(e.clientX);
    setY(e.clientY);
  };
  return (
      <div
        onPointerMove={handlePointerMove}
        style={{
          width: "100vw",
          height: "100vh",
        }}
      />
  );

 const [position, setPosition] = useState({ x: 0, y: 0 });

 const handlePointerMove = (e) => {
    setPosition({
      x: e.clientX,
      y: e.clientY,
    });
  };
  return (...
  );

const [userName, setUserName] <

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