export interface NodeType {
    el: Element | null;
    id: string | null;
    attribute: string;
    content: string;
    level: number;
    children: NodeType[];
    prev?: NodeType;
}
export interface OptionsType {
    attributes?: ("h1" | "h2" | "h3" | "h4" | "h5")[];
    containerClassName?: string;
    ordered?: boolean;
    containerSelector?: string;
    containerElement?: HTMLElement;
    contentSelector?: string;
    contentElement?: HTMLElement;
    returnObject?: boolean;
}
export default class TableOfContents {
    content: HTMLElement | null;
    nodeList: NodeType[] | undefined;
    nodeObject: NodeType | null;
    markup: HTMLElement | null;
    options?: OptionsType;
    settings: OptionsType;
    constructor(options?: OptionsType);
    init: () => void | NodeType | null;
    private findAllHeaders;
    private createHierarchy;
    private generateMarkup;
}