/**
 * 递归访问嵌套属性
 * @param {object} obj
 * @param {string} path 属性路径字符串，eg: "a.b.c"
 */
export declare function getNestedProperty(obj: object, path: string): any;
/**
 * 转义正则特殊字符
 * @param {string} str
 */
export declare function escapeRegExp(str: string): string;
/**
 * 获取系统主题色
 */
export declare function getOsTheme(): "dark" | "light";
/**
 * 获取rem的px值
 */
export declare function remToPxNumber(rem: number): number;