import { ObjectType } from '../common/type';
import { DisabledOption } from '../components/use-tree/use-tree.type';
import { UnMatchedData } from '../common/use-list-select/use-list.type';
import React from 'react';
export declare function isBrowser(): boolean;
export declare const isArray: (arg: any) => arg is any[];
export declare const isObject: (val: unknown) => val is ObjectType;
export declare const isDate: (val: unknown) => val is Date;
export declare const isBoolean: (val: unknown) => val is boolean;
export declare const isError: (val: unknown) => boolean;
export declare const isNumber: (n: unknown) => n is number;
export declare const isRegexp: (val: unknown) => boolean;
export declare const isString: (s: unknown) => s is string;
export declare const isUndefined: (obj: any) => obj is undefined;
export declare const isMap: (val: unknown) => boolean | null;
export declare const isSet: (val: unknown) => boolean | null;
export declare const isBuffer: (val: unknown) => boolean;
export declare const isUnMatchedData: (val: unknown) => val is UnMatchedData;
export declare const isMergeable: (val: unknown) => boolean;
export declare const isFunc: (f: unknown) => f is Function;
export declare const isPromise: (p: unknown) => unknown;
export declare const isNan: (a: unknown) => boolean;
export declare const isEmpty: (val: unknown) => boolean;
export declare const isLink: (el: unknown) => el is React.ReactElement<any, string | React.JSXElementConstructor<any>>;
export declare function isNamedComponent(type: any): type is React.ForwardRefExoticComponent<unknown>;
export declare const isMacOS: () => boolean;
export declare const isFirefox: () => boolean;
export declare function isDomElement(element: any): element is HTMLElement;
export declare const isOptionalDisabled: <DataItem>(disabled: unknown) => disabled is DisabledOption<DataItem>;
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