Manus JS is a client-side JavaScript library that embeds an intelligent research assistant into any web page. It scans and understands HTML content, then uses AI to generate summaries of articles, answer specific questions with references, extract named entities, and produce citation lists in multiple formats. Developers can configure custom prompts, data sources, and UI components to match branding. Manus JS works offline on cached content and connects to AI APIs for live research, making it suitable for academic portfolios, news aggregation sites, or knowledge base platforms seeking to empower users with instant insights.