/***
 * @file:
 * @author: caojianping
 * @Date: 2021-06-16 17:42:28
 */
/**
 * 判断是否为IE9
 */
export declare const isIE9: () => boolean;
/**
 * 判断是否为空对象
 */
export declare const isEmptyObject: (obj: any) => boolean;
/**
 * 判断是否为undefined或者null
 */
export declare const isUndefinedOrNull: (obj: any) => boolean;