td_official/src/plugins/cache.ts

const sessionCache = {
  set(key: string, value: any) {
    if (!sessionStorage || key == null || value == null) return;

    try {
      const str = typeof value === 'string' ? value : JSON.stringify(value);

      // 限制：如果数据超过 1MB，就不存
      if (str.length > 1024 * 1024) {
        console.warn(`sessionStorage.setItem(${key}) 跳过，数据过大（${(str.length / 1024).toFixed(2)} KB）`);
        return;
      }

      sessionStorage.setItem(key, str);
    } catch (e) {
      console.error(`sessionStorage.setItem(${key}) 失败:`, e);
    }
  },

  get(key: string) {
    if (!sessionStorage) {
      return null;
    }
    if (key == null) {
      return null;
    }
    return sessionStorage.getItem(key);
  },
  setJSON(key: string, jsonValue: any) {
    if (jsonValue != null) {
      this.set(key, JSON.stringify(jsonValue));
    }
  },
  getJSON(key: string) {
    const value = this.get(key);
    if (value != null) {
      return JSON.parse(value);
    }
    return null;
  },
  remove(key: string) {
    sessionStorage.removeItem(key);
  }
};
const localCache = {
  set(key: string, value: any) {
    if (!localStorage) {
      return;
    }
    if (key != null && value != null) {
      localStorage.setItem(key, value);
    }
  },
  get(key: string) {
    if (!localStorage) {
      return null;
    }
    if (key == null) {
      return null;
    }
    return localStorage.getItem(key);
  },
  setJSON(key: string, jsonValue: any) {
    if (jsonValue != null) {
      this.set(key, JSON.stringify(jsonValue));
    }
  },
  getJSON(key: string) {
    const value = this.get(key);
    if (value != null) {
      return JSON.parse(value);
    }
    return null;
  },
  remove(key: string) {
    localStorage.removeItem(key);
  }
};

export default {
  /**
   * 会话级缓存
   */
  session: sessionCache,
  /**
   * 本地缓存
   */
  local: localCache
};