export type MenuElement = string | HTMLElement;
export type SmoothScroll = boolean | ScrollIntoViewOptions;
export type Options = {
    sectionClass: string;
    menuActiveTarget: string;
    offset: number;
    hrefAttribute: string;
    activeClass: string;
    scrollContainer: string | HTMLElement;
    smoothScroll: SmoothScroll;
    smoothScrollBehavior?: (targetElement: HTMLElement, smoothScrollOptions: SmoothScroll) => void;
    onActive?: (activeItem: HTMLElement) => void;
};
export declare class ScrollSpy {
    menuList: HTMLElement | null;
    options: Options;
    scroller: HTMLElement | Window | null;
    sections: NodeListOf<HTMLElement>;
    protected activeItem: HTMLElement | null;
    constructor(menu: MenuElement, options?: Partial<Options>);
    attachEventListeners(): void;
    onClick(event: MouseEvent): void;
    onScroll(): void;
    scrollTo(targetElement: HTMLElement): void;
    getMenuItemBySection(section?: HTMLElement): HTMLElement | null | undefined;
    getSectionInView(): HTMLElement | undefined;
    setActive(menuItem: HTMLElement): void;
    removeCurrentActive({ ignore }?: {
        ignore?: HTMLElement;
    }): void;
}