import type { MutableRefObject } from 'react';
/**
 *
 * @param classes
 * @description Join multiple classNames
 * @returns {string}
 */
export declare const classNameGenerator: (classes: Array<string | boolean | undefined | null>) => string;
/**
 *
 * @param value
 * @description Keeps the previous value
 * @returns {value}
 */
export declare function usePrevious<T>(value: T): MutableRefObject<T | undefined>['current'];