/**
 * Static utility methods for blog content processing.
 *
 * @example
 * ```ts
 * import BlogUtils from '@leafpad/blogs';
 *
 * BlogUtils.calculateReadTime(post.htmlContent); // '4 min read'
 * BlogUtils.formatDate(post.createdAt);          // 'January 15, 2024'
 * BlogUtils.slugify('Hello World!');             // 'hello-world'
 * ```
 */
export default class BlogUtils {
    /**
   * Utility: Calculate reading time for content
   */
    static calculateReadTime(content: string): string;
    /**
     * Utility: Format date for display
     */
    static formatDate(dateString: string, options?: Intl.DateTimeFormatOptions): string;
    /**
     * Utility: Extract text content from HTML
     */
    static extractTextFromHtml(html: string, maxLength?: number): string;
    /**
     * Convert text to a URL-safe slug.
     * Lowercases, removes special characters, replaces spaces/underscores with hyphens.
     * @example `"Hello World!"` → `"hello-world"`
     */
    static slugify(text: string): string;
    /**
     * Attach an IntersectionObserver to a TOC element by id.
     * Call this client-side after the page has rendered.
     * @param tocId - The id of the TOC container element (default: 'toc')
     * @returns `{ observer, destroy }` — call `destroy()` on component unmount
     */
    static attachTocListener(tocId?: string): {
        observer: IntersectionObserver;
        destroy: () => void;
    };
}
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