hooks/useLocalStorage.ts

// FIX: Import `React` to use for type annotations like `React.Dispatch`.
import React, { useState, useEffect } from 'react';

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

  useEffect(() => {
    try {
      const valueToStore =
        typeof storedValue === 'function'
          ? storedValue(storedValue)
          : storedValue;
      window.localStorage.setItem(key, JSON.stringify(valueToStore));
    } catch (error) {
      console.error(error);
    }
  }, [key, storedValue]);

  return [storedValue, setStoredValue];
}