interface BackToTopProps {
    /** Pixels scrolled before the button appears. */
    threshold?: number;
    smooth?: boolean;
    label?: string;
    position?: 'bottom-right' | 'bottom-left';
    /**
     * Scroll container to watch. Defaults to the window.
     * Pass an element (e.g. an overflow panel) when the page itself doesn't scroll.
     */
    target?: HTMLElement | null;
    /**
     * `fixed` = viewport (default for window).
     * `absolute` = relative to nearest positioned ancestor (use with a local `target`).
     */
    mode?: 'fixed' | 'absolute';
    class?: string;
}
declare const BackToTop: import("svelte").Component<BackToTopProps, {}, "">;
type BackToTop = ReturnType<typeof BackToTop>;
export default BackToTop;