markdownParser = Parser.builder().extensions(extensions).build();

        htmlRenderer = HtmlRenderer.builder().extensions(extensions).softbreak("<br/>").build();

        // Configure OWASP HTML Sanitizer with allowed tags
        htmlSanitizer = new HtmlPolicyBuilder()
                // Headings
                .allowElements("h1", "h2", "h3", "h4", "h5", "h6")

        if (typeof marked === 'undefined' || typeof DOMPurify === 'undefined') {
            return escapeHtml(text);
        }
        initMarkdownSanitizer();
        // breaks: true to match server-side softbreak("<br/>")
        var html = marked.parse(text, { gfm: true, breaks: true });
        return DOMPurify.sanitize(html, markdownSanitizeConfig);
    }

    /**
     * Escape HTML characters
     */