import { AfterViewInit, ElementRef, OnDestroy, OnInit } from '@angular/core';
import { Subject } from 'rxjs/Subject';
import { ScrollbarService } from '../services/scrollbar.service';
import { WindowService } from '../services/window.service';
export declare class ManageVisibility implements OnInit, AfterViewInit, OnDestroy {
    el: ElementRef;
    scroll: ScrollbarService;
    window: WindowService;
    eivVisible: boolean;
    offsetTop: number;
    ngUnsubscribe: Subject<void>;
    constructor(el: ElementRef, scroll: ScrollbarService, window: WindowService);
    ngOnInit(): void;
    ngAfterViewInit(): void;
    ngOnDestroy(): void;
    /**
     * check for visibility of element
     */
    manageVisibility(): void;
}