import React from 'react';
export declare const isArray: (arg: any) => arg is any[];
export declare const isObject: (val: any) => val is Record<any, any>;
export declare const isDate: (val: any) => boolean;
export declare const isFunc: (f: any) => f is (...args: any[]) => any;
export declare const isString: (s: any) => s is string;
export declare const isNumber: (n: any) => n is number;
export declare const isBoolean: (b: any) => b is boolean;
export declare const isError: (val: any) => val is Error;
export declare const isNull: (val: any) => val is null;
export declare const isNan: (val: any) => boolean;
export declare const isRegexp: (val: any) => boolean;
export declare const isMap: any;
export declare const isSet: any;
export declare const isSymbol: any;
export declare const isPromise: (p: any) => p is Promise<any>;
export declare const isSyntheticEvent: (event: any) => event is React.SyntheticEvent<Element, Event>;
export declare const isBuffer: (val: any) => any;
export declare const isBlob: (val: any) => val is Blob;
export declare const isEmpty: (val: any) => boolean;
export declare function isEmptyStr(str: string): boolean;
export declare function isZero(num: number): boolean;
export declare const isMergeable: (val: any) => boolean;
export declare const isOne: (val: any) => boolean;
export declare const isPercent: (n: any) => boolean;
export declare const isInseparable: (val: any) => any;
export declare const isLink: (el: React.ReactElement<{
    to?: string;
}>) => boolean;
export declare const isEnterPress: (e: React.KeyboardEvent) => boolean;
export declare const isPrimitive: (val: any) => boolean;