React Hook recipe from https://usehooks.com. Demo: https://codesandbox.io/s/01w2zmj010

use-hover-example.js

import { useRef, useState, useEffect } from 'react';

// Usage
function App() {
  const [hoverRef, isHovered] = useHover();

  return (
    <div ref={hoverRef}>
      {isHovered ? '😁' : '☹️'}
    </div>
  );
}

// Hook
function useHover() {
  const [value, setValue] = useState(false);

  const ref = useRef(null);

  useEffect(
    () => {
      const node = ref.current;
      if (node) {
        const handleMouseOver = () => setValue(true);
        const handleMouseOut = () => setValue(false);

        node.addEventListener('mouseover', handleMouseOver);
        node.addEventListener('mouseout', handleMouseOut);

        return () => {
          node.removeEventListener('mouseover', handleMouseOver);
          node.removeEventListener('mouseout', handleMouseOut);
        };
      }
    },
    [ref.current] // Recall only if ref changes
  );

  return [ref, value];
}