export declare function isString(data: any): data is string;
export declare function isNumber(data: any): data is number;
export declare function isFunction(data: any): data is Function;
export declare function isUndefined(data: any): data is undefined;
export declare function isPlainObject(data: any): data is Record<string, any>;
export declare function isNull(data: any): data is null;
export declare function isUndef(data: any): data is null | undefined;
export declare function isArray(data: any): data is Array<any>;
export declare function isBoolean(data: any): data is boolean;
export declare function isMobile(): boolean;