export declare function isBlank(val: any): boolean;
export declare function isAllBlank(...args: any[]): boolean;
export declare function isAllFull(...args: any[]): boolean;
export declare function isUndef(val: any): boolean;
export declare function isEmptyObject(obj: any): boolean;
export declare function isObject(obj: any): boolean;
export declare function isArray(obj: any): boolean;
export declare function isDate(value: any): boolean;
export declare function isEmptyArray(obj: any): boolean;
export declare function hasHorizontalScrollbar(prevScrollSize?: number): boolean;
export declare function hasVerticalScrollbar(prevScrollSize?: number): boolean;
export declare function hasScrollbar(prevScrollSize?: number): boolean;
export declare const canUseDOM: boolean;
export declare function isTouchScreen(): boolean;