import { OnInit, OnDestroy, ElementRef } from '@angular/core';
import { ScrollSpyService } from './scroll-spy.service';
import * as i0 from "@angular/core";
/**
 * Creates a scroll-spy on this spy targets container (element).
 *
 * Automatically destroys the scroll-spy when the element is destroyed.
 *
 * This is useful:
 *
 * - when you have multiple (independent) scrollable elements on the same page,
 * - or the scrollable element on your page is not the browser default scrollable element, for example `<mat-sidenav-content>` if you are using [Angular Material Sidenav](https://material.angular.io/components/sidenav)
 *
 * where you want to have a scroll-spy.
 */
export declare class SpyTargetContainerDirective implements OnInit, OnDestroy {
    private scrollSpyService;
    private platformId;
    private elementRef;
    /**
     * ID for this spyTargetContainer.
     */
    spyTargetContainerId: string;
    constructor(scrollSpyService: ScrollSpyService, platformId: string, elementRef: ElementRef<Element>);
    ngOnInit(): void;
    ngOnDestroy(): void;
    static ɵfac: i0.ɵɵFactoryDeclaration<SpyTargetContainerDirective, never>;
    static ɵdir: i0.ɵɵDirectiveDeclaration<SpyTargetContainerDirective, "[spyTargetContainer]", never, { "spyTargetContainerId": "spyTargetContainerId"; }, {}, never, never, true>;
}