Persist React State to Local Storage

import { useState, useEffect } from 'react';

function useLocalStorage(key, initialValue) {
  const [storedValue, setStoredValue] = useState(() => {
    try {
      const item = window.localStorage.getItem(key);
      return item ? JSON.parse(item) : initialValue;
    } catch (error) {
      console.error(error);
      return initialValue;
    }
  });

  useEffect(() => {
    try {
      window.localStorage.setItem(key, JSON.stringify(storedValue));
    } catch (error) {
      console.error(error);
    }
  }, [key, storedValue]);

  return [storedValue, setStoredValue];
}

export default useLocalStorage;

// Example Usage:
// function ThemeToggler() {
//   const [theme, setTheme] = useLocalStorage('appTheme', 'light');
//
//   const toggleTheme = () => {
//     setTheme(prevTheme => prevTheme === 'light' ? 'dark' : 'light');
//   };
//
//   return (
//     <div>
//       <p>Current theme: {theme}</p>
//       <button onClick={toggleTheme}>Toggle Theme</button>
//     </div>
//   );
// }