import { DoCheck, ElementRef, Injector, OnDestroy } from '@angular/core';
export declare class SmoothScrollDirective implements DoCheck, OnDestroy {
    private readonly _$el;
    private _isEnabled;
    private _smoothScrollInstance;
    private _lastScrollY;
    private _waitRefreshTill;
    constructor(inj: Injector, elRef: ElementRef);
    ngDoCheck(): void;
    ngOnDestroy(): void;
    wmSmoothscroll: string;
    private applySmoothScroll;
    private refreshIScroll;
}