import { ElementRef, EventEmitter, OnInit } from '@angular/core';
export declare class InfiniteScrollDirective implements OnInit {
    private elementRef;
    initItems: EventEmitter<{}>;
    fetchMore: EventEmitter<{}>;
    eachElementHeightInPx: number;
    fetchThreshold: number;
    pageSize: number;
    lastCheckedHeight: number;
    previousScrollHeight: number;
    constructor(elementRef: ElementRef);
    private element;
    ngOnInit(): void;
    initContentItems(): void;
    onScrollContainer(event: any): void;
}