import { ElementRef, Renderer2, AfterViewChecked } from '@angular/core';
export declare class AtxAffixDirective implements AfterViewChecked {
    private readonly el;
    private readonly render;
    offset: number;
    addClass: string;
    readonly isOffsetParentTop: boolean;
    private sticked;
    private selectedOffset;
    private windowOffsetTop;
    constructor(el: ElementRef, render: Renderer2);
    ngAfterViewChecked(): void;
    private addSticky();
    private removeSticky();
    onWindowScroll(): void;
}