/**
 * Directive to show/hide element based on scroll offset.
 *
 * @author Joaquin Volpe <joaquin.volpe@woopasoft.com>
 * @export
 */
export declare class ScrollVisibleDirective {
    /**
     * Scroll offset.
     */
    scrollOffsetVisible: number;
    /**
     * Flag to mantain if element should has hidden class or not.
     */
    display: string;
    /**
     * Bind window scroll event
     */
    scroll(target: any): void;
    /**
     * Check current element visibility.
     *
     * @author Joaquin Volpe <joaquin.volpe@woopasoft.com>
     * @memberof ScrollVisibleDirective
     */
    private checkVisibility($event);
}