src/app/hook/useLocalStorage.ts

import { useEffect, useState } from 'react';

// export const useLocalStorage = <T>(key: string): T | null => {
//   const [value, setValue] = useState<T | null>(null);

//   useEffect(() => {
//     if (typeof window !== 'undefined') {
//       const item = localStorage.getItem(key);
//       if (item) {
//         try {
//           setValue(JSON.parse(item));
//           console.log(JSON.parse(item));
//         } catch (e) {
//           console.error(`解析 localStorage ${key} 失败`, e);
//         }
//       }
//     }
//   }, [key]);

//   return value;
// };

export const useLocalStorage = <T>(key: string): T | null => {
  const isClient = typeof window !== 'undefined';
  const [value, setValue] = useState<T | null>(() => {
    if (isClient) {
      const item = localStorage.getItem(key);
      if (item) {
        try {
          return JSON.parse(item);
        } catch (e) {
          console.error(`解析 localStorage ${key} 失败`, e);
        }
      }
    }
    return null;
  });

  useEffect(() => {
    if (!isClient) return;
    const item = localStorage.getItem(key);
    if (item) {
      try {
        setValue(JSON.parse(item));
      } catch (e) {
        console.error(`解析 localStorage ${key} 失败`, e);
      }
    }
  }, [key]);

  return value;
};