import { Observable } from 'rxjs/Observable';
/**
 * Service to scroll to element.
 *
 * @author Joaquin Volpe <joaquin.volpe@woopasoft.com>
 * @export
 */
export declare class ScrollToService {
    /**
     * Scroll to element.
     *
     * @author Joaquin Volpe <joaquin.volpe@woopasoft.com>
     * @memberof ScrollToService
     */
    scrollTo(element: string | HTMLElement, duration?: number, offset?: number): Observable<any>;
    /**
     * Scroll to top of the page.
     *
     * @author Joaquin Volpe <joaquin.volpe@woopasoft.com>
     * @memberof ScrollToService
     */
    scrollToTop(duration?: number, offset?: number): Observable<any>;
    /**
     * Scroll to element.
     *
     * @author Joaquin Volpe <joaquin.volpe@woopasoft.com>
     * @memberof ScrollToService
     */
    private scrollToElement(el, duration, offset, subject);
    /**
     * Do scrolling.
     *
     * @author Joaquin Volpe <joaquin.volpe@woopasoft.com>
     * @memberof ScrollToService
     */
    private doScrolling(elementY, duration, subject);
}