/**
 * Copyright (c) 2018 - 2022 Dell Inc., or its subsidiaries. All Rights Reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 */
/// <reference types="react" />
export declare const NUMBER_RE: RegExp;
export declare type ReactChildren = React.ReactNode | (React.ReactNode[] & React.ReactNode);
export declare enum KEYBOARD_KEYS {
    ESCAPE = "Escape",
    TAB = "Tab",
    ENTER = "Enter",
    SPACE = " ",
    BACKSPACE = "Backspace",
    DELETE = "Delete"
}
export declare function classNames(classNameList: (false | undefined | null | string)[]): string;
export declare function allTrue(obj: any): boolean;
export declare function allTrueOnKey(obj: any, key: any): boolean;
export declare function allFalseOnKey(obj: any, key: any): boolean;
/**
 * Function to check if input is a number.
 * @param {input} - The input to be checked.
 * @returns True if the input is a number, false otherwise.
 */
export declare function isNumber(input: any): boolean;
/**
 * Function to check if a key event allows only number inputs.
 * @param {evt} - The key event to be checked.
 * @returns True if the event allows only number inputs, false otherwise.
 */
export declare function allowOnlyIntegers(evt: any): boolean;