import { Options } from '@popperjs/core';
import { PlacementArray } from '../util/positioning';
import * as i0 from "@angular/core";
/**
 * A configuration service for the [`NgbDropdown`](#/components/dropdown/api#NgbDropdown) component.
 *
 * You can inject this service, typically in your root component, and customize the values of its properties in
 * order to provide default values for all the dropdowns used in the application.
 */
export declare class NgbDropdownConfig {
    autoClose: boolean | 'outside' | 'inside';
    placement: PlacementArray;
    popperOptions: (options: Partial<Options>) => Partial<Options>;
    container: null | 'body';
    static ɵfac: i0.ɵɵFactoryDeclaration<NgbDropdownConfig, never>;
    static ɵprov: i0.ɵɵInjectableDeclaration<NgbDropdownConfig>;
}