import { NgZone } from '@angular/core';
import * as i0 from "@angular/core";
export declare class InfiniteScrollService {
    private ngZone;
    private threshold;
    private debounceTime;
    private complete;
    private thrPx;
    private thrPc;
    private destroyed$;
    private selectItemHeightPx;
    private panel;
    constructor(ngZone: NgZone);
    initialize(panel: Element, selectItemHeightPx: number, config: {
        threshold: string;
        debounceTime: number;
        complete: boolean;
    }): void;
    evaluateThreshold(): void;
    registerScrollListener(infiniteScrollCallback: () => void): void;
    handleScrollEvent(event: any, infiniteScrollCallback: () => void): void;
    destroy(): void;
    static ɵfac: i0.ɵɵFactoryDeclaration<InfiniteScrollService, never>;
    static ɵprov: i0.ɵɵInjectableDeclaration<InfiniteScrollService>;
}