import { Environment } from '../downshift.types';
/**
 * Checks if event target is within the downshift elements.
 *
 * @param target Target to check.
 * @param downshiftElements The elements that form downshift (list, toggle button etc).
 * @param environment The window context where downshift renders.
 * @param checkActiveElement Whether to also check activeElement.
 *
 * @returns Whether or not the target is within downshift elements.
 */
export declare function targetWithinDownshift(target: EventTarget | undefined | null, downshiftElements: (HTMLElement | undefined | null)[], environment: Environment | undefined, checkActiveElement?: boolean): boolean;