Cheerio

HTML/XML Parsing Library C Integrations & Community

Basic Information

Product Description

Cheerio is the industry-standard library for handling HTML in the JavaScript ecosystem, offering a fast, flexible, and lightweight implementation of jQuery's core subset for server-side use. Cheerio parses raw HTML markup and provides a jQuery-like API to traverse and manipulate the resulting data structure, enabling DOM manipulation on the server side without requiring a browser environment. Cheerio uses parse5 for HTML parsing under the hood, with the option to use the more lenient htmlparser2.

Core Features/Characteristics

  • jQuery-style API: Utilizes familiar jQuery selectors and manipulation methods
  • Blazing Fast Parsing: Extremely high performance in parsing, manipulation, and rendering
  • Server-side Execution: Directly usable in Node.js without a browser environment
  • HTML/XML Support: Supports parsing of both HTML and XML documents
  • Cross-environment: Compatible with both browser and server-side environments
  • Flexible Parser: Supports both parse5 and htmlparser2 parsing engines
  • DOM Traversal: Full DOM traversal and manipulation capabilities (finding, filtering, modifying, etc.)

Usage Limitations

  • Static HTML Only: Cheerio is solely an HTML parser and cannot execute JavaScript
  • No Dynamic Page Support: Cannot handle SPAs and JavaScript-driven dynamic content
  • Requires HTTP Library: Typically used in conjunction with HTTP libraries like axios or fetch to retrieve HTML

Business Model

  • Completely Free and Open Source: MIT License
  • Community Maintained: Continuously maintained by the open-source community

Suitable Scenarios

  • Static web page data scraping
  • HTML template processing and transformation
  • Server-side HTML manipulation
  • Web content extraction and cleaning

Relationship with the OpenClaw Ecosystem

Cheerio serves as the web parsing tool within the OpenClaw ecosystem. When AI agents need to extract structured data from web pages, OpenClaw utilizes Cheerio to parse HTML content, leveraging jQuery-style selectors to quickly locate and extract the required information. Cheerio's lightweight and efficient nature makes it ideal for batch parsing tasks involving large volumes of web pages. When used in conjunction with Playwright/Puppeteer, it can cover both static and dynamic web page data extraction needs.