import React from 'react';
import type { CnNumberPickerProps } from './types';
export declare function getValueFromEvents(e: any): any;
/**
 * 用于表单中判断无效值
 * eg:
 *   isInvalidValue('') : true
 *   isInvalidValue(undefined) : true
 *   isInvalidValue(null) : true
 */
export declare function isInvalidValue(val: any): boolean;
declare const CnNumberPicker: React.ForwardRefExoticComponent<CnNumberPickerProps & React.RefAttributes<any>>;
export { CnNumberPicker };