import { useEffect, useRef } from 'react';

function useOnClickOutside(ref, handler) {
  useEffect(() => {
    const listener = (event) => {
      // Do nothing if clicking ref's element or descendant elements
      if (!ref.current || ref.current.contains(event.target)) {
        return;
      }
      handler(event);
    };

    document.addEventListener('mousedown', listener);
    document.addEventListener('touchstart', listener);

    return () => {
      document.removeEventListener('mousedown', listener);
      document.removeEventListener('touchstart', listener);
    };
  }, [ref, handler]);
}

// Example Usage:
// function DropdownMenu() {
//   const [isOpen, setIsOpen] = useState(false);
//   const dropdownRef = useRef(null);

//   useOnClickOutside(dropdownRef, () => setIsOpen(false));

//   return (
//     <div ref={dropdownRef}>
//       <button onClick={() => setIsOpen(!isOpen)}>Toggle Menu</button>
//       {isOpen && (
//         <ul>
//           <li>Item 1</li>
//           <li>Item 2</li>
//           <li>Item 3</li>
//         </ul>
//       )}
//     </div>
//   );
// }