import { UtilObject } from '../types/utils';
export declare function isNumber(val: unknown): val is number;
export declare function isObject(val: unknown): val is UtilObject;
export declare function isDate(val: unknown): val is UtilObject;
export declare function isFunc<T = string>(val: unknown): val is (...arg: any) => T;
export declare function isString(val: unknown): val is string;
export declare function isBoolean(val: unknown): val is boolean;
export declare function isArray<T = unknown>(val: unknown): val is T[];
export declare function has(target: string | string[], val: string | string[]): boolean;
export declare function not(target: string | string[], val: string | string[]): boolean;