/**
 * createTOC(options)
 *
 * A small, dependency-free TOC builder for static/dynamically inserted HTML.
 */
export type TOCOptions = {
    contentSelector: string;
    tocSelector: string;
    headingSelector?: string;
    excludeHeadingLevels?: number[];
    addNumbers?: boolean;
    activeClass?: string;
    linkClass?: string;
    scrollBehavior?: ScrollIntoViewOptions;
};
/**
 * Attach an IntersectionObserver to all anchor links inside the provided
 * TOC container. The function will lookup each link's target id
 * (from data-target-id or href) and observe the corresponding element in
 * the document. When a heading becomes visible, the corresponding link
 * inside the container will receive the `active` class by default (or a
 * custom class provided via options.activeClass). Returns the observer and
 * a destroy() helper to disconnect it when no longer needed.
 */
export declare function attachObserverToTOCLinks(tocId: string, options?: {
    activeClass?: string;
    root?: Element | null;
    rootMargin?: string;
    threshold?: number | number[];
}): {
    observer: IntersectionObserver;
    destroy: () => void;
};
type HeadingData = {
    id: string;
    text: string;
    level: number;
};
/**
 * Render TOC as an HTML string from HeadingData array.
 * This does not touch the DOM — it simply returns the HTML so you can insert it
 * into your renderer or manipulate it as you wish.
 */
export declare function renderTOCHTML(headingsData: HeadingData[], opts?: {
    addNumbers?: boolean;
    linkClass?: string;
}): string;
export {};
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