export declare const objectToString: () => string;
export declare const is: (value: unknown, type: string) => boolean;
export declare const isArray: (arg: any) => arg is any[];
export declare const isMap: (val: unknown) => val is Map<any, any>;
export declare const isSet: (val: unknown) => val is Set<any>;
export declare const isBoolean: (val: unknown) => val is Boolean;
export declare const isNumber: (val: unknown) => val is Number;
export declare const isDate: (val: unknown) => val is Date;
export declare const isFunction: (val: unknown) => val is Function;
export declare const isString: (val: unknown) => val is string;
export declare const isSymbol: (val: unknown) => val is symbol;
export declare const isObject: (val: unknown) => val is Record<any, any>;
export declare const isPlainObject: (val: unknown) => val is object;
export declare const isPromise: <T = any>(val: unknown) => val is Promise<T>;
export declare const isDef: (val: any) => val is undefined;
export declare const isUndef: (val: any) => val is undefined;
export declare const isRegExp: (val: unknown) => val is RegExp;
export declare const isEmpty: (val: unknown) => boolean;
export declare const isElement: (e: unknown) => e is Element;
export declare const isPropAbsent: (prop: unknown) => prop is null | undefined;
export declare function isUrl(path: string): boolean;
export declare const isWindow: (val: any) => val is Window;
export declare const isServer: boolean;
export declare const isClient: boolean;