/**
 * localstorage操作工具
 */
/**
 * 设置localstorage数据
 *
 * @param key
 * @param value
 */
export declare const localStorageSet: (key: string, value: string) => void;
/**
 * 获取localstorage数据
 *
 * @param key
 */
export declare const localStorageGet: (key: string) => string | null;
/**
 * 删除localstorage数据
 *
 * @param key
 */
export declare const localStorageRemove: (key: string) => void;
/**
 * 设置具有有效过期时间的localstorage数据
 *
 * @param key
 * @param value
 * @param ttl ms
 */
export declare const localStorageSetItem: (key: string, value: any, ttl: number | null) => void;
/**
 * 获取具有有效过期时间的localstorage数据
 *
 * @param key
 */
export declare const localStorageGetItem: (key: string) => string | null;