import { ElementRef, AfterViewInit, OnDestroy, Renderer2, EventEmitter } from '@angular/core';
/**
 * The `ngxHideOnScroll` directive allows you to hide an html element (e.g. navbar) on scroll down and show it again on scroll up.
 */
export declare class NgxHideOnScrollDirective implements AfterViewInit, OnDestroy {
    private elementRef;
    private renderer2;
    private platformId;
    /**
     * `'Down'`: The element will be hidden on scroll down and it will be shown again on scroll up.<br/>`Up`: The element will be hidden on scroll up and it will be shown again on scroll down.
     */
    hideOnScroll: 'Down' | 'Up';
    /**
     * CSS class name added to the element to hide it. When this property is set, `propertyUsedToHide`, `valueWhenHidden`, and `valueWhenShown` have not effect.
     */
    classNameWhenHidden: string;
    /**
     * The CSS property used to hide/show the element.
     *
     * @default
     * 'transform'
     */
    propertyUsedToHide: 'transform' | 'top' | 'bottom' | 'height';
    /**
     * The value of `propertyUsedToHide` when the element is hidden.
     *
     * @default
     * 'translateY(-100%)'
     */
    valueWhenHidden: string;
    /**
     * The value of `propertyUsedToHide` when the element is shown.
     *
     * @default
     * 'translateY(0)'
     */
    valueWhenShown: string;
    /**
     * The selector of the element you want to listen the scroll event, in case it is not the default browser scrolling element (`document.scrollingElement` or `document.documentElement`). For example [` .mat-sidenav-content`]( https://stackoverflow.com/a/52931772/12954396) if you are using [Angular Material Sidenav]( https://material.angular.io/components/sidenav)
     */
    scrollingElementSelector: string;
    /**
     * Emitted when the element is hidden.
     */
    eventElementHidden: EventEmitter<void>;
    /**
     * Emitted when the element is shown.
     */
    eventElementShown: EventEmitter<void>;
    private unsubscribeNotifier;
    constructor(elementRef: ElementRef<HTMLElement>, renderer2: Renderer2, platformId: string);
    ngAfterViewInit(): void;
    ngOnDestroy(): void;
    private hideElement;
    private showElement;
    private getDefaultScrollingElement;
}