/**
 * 获取指定元素的 rect 值
 * @param id  格式为： `#id`
 */
export declare function getElementBoundingClientRect(id: any): Promise<{
    left: any;
    bottom: any;
    top: any;
    right: any;
    width: any;
    height: any;
    x: any;
    y: any;
}>;
/**
 * 根据指定 Id 获取元素宽度
 * @param id
 */
export declare function getWidth(id: any): Promise<any>;
export declare function isNumber(num: any): boolean;
/**
 * 是否为字符串
 * @param str
 */
export declare function isString(str: any): boolean;
export declare const isStrictWechatMiniProgram: boolean;
export declare const isStrictMiniApp: boolean;
/**
 * 简单实现 lodash.get 的取值方式
 * eg: a[3].b -> a.3.b
 * @param source
 * @param path
 * @param defaultValue
 */
export declare function get(source: any, path: any, defaultValue?: string): any;
export declare function guid(prefix?: string): string;
export declare function useGuid(prefix?: string): string;