mouse.js

import { useState, useEffect } from 'react';
import { createHook } from 'hookleton';

const useMousePosition = createHook(() => {
  const [position, setPosition] = useState({ x: null, y: null });

  const handleMouseMove = e => setPosition({ x: e.pageX, y: e.pageY });

  useEffect(() => {
    window.addEventListener('mousemove', handleMouseMove);
    return () => window.removeEventListener('mousemove', handleMouseMove);
  }, []);

  return [position];
});

const MouseHost = () => (useMousePosition.use(), null);

const Mouse = () => {
  const [mousePosition] = useMousePosition();
  return (
    <div style={{ borderStyle: 'solid' }}>
      x: {mousePosition.x}, y: {mousePosition.y}
    </div>
  );
};

// put <Mouse /> in a table of 1x12 cells
const TableMouse = () => (
  <table>
    <tbody>
      <tr>
        {Array.from({ length: 12 }).map((_, idx) => (
          <td key={idx}>
            <Mouse />
          </td>
        ))}
      </tr>
    </tbody>
  </table>
);

// repeat <TableMouse /> 100 times
export default () => (
  <>
    <MouseHost />
    <ul style={{ listStyle: 'none' }}>
      {Array.from({ length: 100 }).map((_, idx) => (
        <li key={idx}>
          <TableMouse />
        </li>
      ))}
    </ul>
  </>
);