cheerio vs dom-serializer vs domutils vs htmlparser2 vs jsdom vs parse5
HTML Parsing and Manipulation Libraries
cheeriodom-serializerdomutilshtmlparser2jsdomparse5Similar Packages:

HTML Parsing and Manipulation Libraries

These libraries are designed for parsing, manipulating, and serializing HTML documents in JavaScript environments. They provide various functionalities for working with HTML structures, enabling developers to easily extract information, modify content, and create new HTML documents. Each library has its own strengths and use cases, making them suitable for different scenarios in web development, such as web scraping, DOM manipulation, and server-side rendering.

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cheerio030,2381.01 MB442 months agoMIT
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Feature Comparison: cheerio vs dom-serializer vs domutils vs htmlparser2 vs jsdom vs parse5

Parsing Capability

  • cheerio:

    Cheerio provides a fast and efficient way to parse HTML documents using a jQuery-like syntax. It is optimized for performance, making it ideal for web scraping tasks where speed is crucial.

  • dom-serializer:

    dom-serializer does not parse HTML but is used to serialize DOM nodes back into HTML strings, ensuring that the output is valid and well-formed.

  • domutils:

    domutils does not provide parsing capabilities but offers utility functions to manipulate and traverse DOM structures, which can be used in conjunction with other parsing libraries.

  • htmlparser2:

    htmlparser2 is a powerful HTML parser that can handle both well-formed and malformed HTML documents, making it suitable for a wide range of web scraping and parsing tasks.

  • jsdom:

    jsdom parses HTML and creates a DOM representation that closely mimics a browser environment, allowing developers to manipulate the DOM as if they were in a browser context.

  • parse5:

    parse5 is a fast and standards-compliant HTML parser that adheres to the HTML5 specification, capable of parsing HTML documents accurately, including malformed HTML.

Serialization

  • cheerio:

    Cheerio allows for easy manipulation of the DOM and provides methods to serialize the modified DOM back into HTML. It is straightforward and efficient for generating HTML from manipulated structures.

  • dom-serializer:

    dom-serializer specializes in converting DOM nodes into HTML strings. It ensures that the output is valid and can be customized based on the needs of the application.

  • domutils:

    domutils does not handle serialization directly but can be used alongside other libraries to manipulate DOM nodes before serialization.

  • htmlparser2:

    htmlparser2 does not provide serialization capabilities directly, but it can be used in conjunction with other libraries for this purpose.

  • jsdom:

    jsdom allows for serialization of the DOM back into HTML, enabling developers to extract the final HTML representation after manipulation.

  • parse5:

    parse5 includes serialization capabilities that convert parsed HTML back into a string format, ensuring compliance with HTML5 standards.

Performance

  • cheerio:

    Cheerio is designed for high performance, making it suitable for tasks that require fast parsing and manipulation of HTML documents, especially in server-side environments.

  • dom-serializer:

    dom-serializer is lightweight and efficient, focusing solely on serialization without the overhead of parsing, ensuring quick conversion of DOM nodes to HTML.

  • domutils:

    domutils is efficient for low-level DOM manipulation tasks, providing utility functions that are optimized for performance when working with DOM nodes.

  • htmlparser2:

    htmlparser2 is known for its speed and efficiency in parsing large HTML documents, making it a preferred choice for performance-sensitive applications.

  • jsdom:

    jsdom, while comprehensive, may have performance overhead due to its full DOM implementation. It is best used when a complete browser-like environment is necessary.

  • parse5:

    parse5 is optimized for speed and can handle large documents efficiently, making it suitable for high-performance applications that require strict compliance with HTML standards.

Use Cases

  • cheerio:

    Cheerio is ideal for web scraping, server-side HTML manipulation, and any scenario where a lightweight, jQuery-like interface is beneficial for DOM manipulation.

  • dom-serializer:

    dom-serializer is best used in conjunction with other libraries that manipulate the DOM and require a reliable way to serialize the resulting structure into valid HTML.

  • domutils:

    domutils is useful for building custom HTML processing solutions where low-level DOM manipulation and querying are needed.

  • htmlparser2:

    htmlparser2 is suitable for web scraping, data extraction, and any application that needs to handle both well-formed and malformed HTML documents.

  • jsdom:

    jsdom is perfect for testing, simulating browser behavior, and applications that require a complete DOM API, making it a great choice for unit tests and server-side rendering.

  • parse5:

    parse5 is ideal for projects that require strict compliance with HTML standards, such as web crawlers, validators, and any application that needs to parse and serialize HTML documents accurately.

Learning Curve

  • cheerio:

    Cheerio has a gentle learning curve, especially for developers familiar with jQuery, making it easy to get started with HTML manipulation.

  • dom-serializer:

    dom-serializer is straightforward to use, with a simple API focused on serialization, making it easy to integrate into existing projects.

  • domutils:

    domutils may require some familiarity with DOM manipulation concepts, but its utility functions are easy to understand and use.

  • htmlparser2:

    htmlparser2 has a moderate learning curve due to its flexibility and options, but it is well-documented, which aids in the learning process.

  • jsdom:

    jsdom may have a steeper learning curve due to its comprehensive API that mimics browser behavior, but it is well-suited for developers needing a full DOM implementation.

  • parse5:

    parse5 has a moderate learning curve, especially for those familiar with HTML parsing concepts, and is well-documented to assist developers.

How to Choose: cheerio vs dom-serializer vs domutils vs htmlparser2 vs jsdom vs parse5

  • cheerio:

    Choose Cheerio if you need a fast and lightweight library for server-side DOM manipulation, especially for web scraping. It implements a jQuery-like syntax, making it easy to use for those familiar with jQuery, and is optimized for performance with a focus on speed and simplicity.

  • dom-serializer:

    Select dom-serializer when you need to convert DOM nodes back into HTML strings. This library is particularly useful when working with other libraries that manipulate the DOM and require a reliable way to serialize the resulting structure into valid HTML.

  • domutils:

    Use domutils if you require a set of utility functions for working with DOM structures. It provides low-level operations for manipulating and querying DOM nodes, making it a good choice for building custom HTML processing solutions or when you need fine-grained control over the DOM.

  • htmlparser2:

    Opt for htmlparser2 when you need a robust and flexible HTML parser that can handle malformed HTML. It is designed for high performance and can parse large documents quickly, making it suitable for web scraping and other applications where performance is critical.

  • jsdom:

    Choose jsdom if you need a full-fledged DOM implementation for Node.js that closely resembles a browser environment. It is ideal for testing and simulating browser behavior, making it a great choice for applications that require a complete DOM API and event handling.

  • parse5:

    Select parse5 when you need a fast and standards-compliant HTML parser that adheres to the HTML5 specification. It is particularly useful for projects that require strict compliance with HTML standards and need to parse and serialize HTML documents accurately.

README for cheerio

cheerio

The fast, flexible, and elegant library for parsing and manipulating HTML and XML.

中文文档 (Chinese Readme)

import * as cheerio from 'cheerio';
const $ = cheerio.load('<h2 class="title">Hello world</h2>');

$('h2.title').text('Hello there!');
$('h2').addClass('welcome');

$.html();
//=> <html><head></head><body><h2 class="title welcome">Hello there!</h2></body></html>

Installation

Install Cheerio using a package manager like npm, yarn, or bun.

npm install cheerio
# or
bun add cheerio

Features

❤ Proven syntax: Cheerio implements a subset of core jQuery. Cheerio removes all the DOM inconsistencies and browser cruft from the jQuery library, revealing its truly gorgeous API.

ϟ Blazingly fast: Cheerio works with a very simple, consistent DOM model. As a result parsing, manipulating, and rendering are incredibly efficient.

❁ Incredibly flexible: Cheerio wraps around parse5 for parsing HTML and can optionally use the forgiving htmlparser2. Cheerio can parse nearly any HTML or XML document. Cheerio works in both browser and server environments.

API

Loading

First you need to load in the HTML. This step in jQuery is implicit, since jQuery operates on the one, baked-in DOM. With Cheerio, we need to pass in the HTML document.

// ESM or TypeScript:
import * as cheerio from 'cheerio';

// In other environments:
const cheerio = require('cheerio');

const $ = cheerio.load('<ul id="fruits">...</ul>');

$.html();
//=> <html><head></head><body><ul id="fruits">...</ul></body></html>

Selectors

Once you've loaded the HTML, you can use jQuery-style selectors to find elements within the document.

$( selector, [context], [root] )

selector searches within the context scope which searches within the root scope. selector and context can be a string expression, DOM Element, array of DOM elements, or cheerio object. root, if provided, is typically the HTML document string.

This selector method is the starting point for traversing and manipulating the document. Like in jQuery, it's the primary method for selecting elements in the document.

$('.apple', '#fruits').text();
//=> Apple

$('ul .pear').attr('class');
//=> pear

$('li[class=orange]').html();
//=> Orange

Rendering

When you're ready to render the document, you can call the html method on the "root" selection:

$.root().html();
//=>  <html>
//      <head></head>
//      <body>
//        <ul id="fruits">
//          <li class="apple">Apple</li>
//          <li class="orange">Orange</li>
//          <li class="pear">Pear</li>
//        </ul>
//      </body>
//    </html>

If you want to render the outerHTML of a selection, you can use the outerHTML prop:

$('.pear').prop('outerHTML');
//=> <li class="pear">Pear</li>

You may also render the text content of a Cheerio object using the text method:

const $ = cheerio.load('This is <em>content</em>.');
$('body').text();
//=> This is content.

The "DOM Node" object

Cheerio collections are made up of objects that bear some resemblance to browser-based DOM nodes. You can expect them to define the following properties:

  • tagName
  • parentNode
  • previousSibling
  • nextSibling
  • nodeValue
  • firstChild
  • childNodes
  • lastChild

Screencasts

https://vimeo.com/31950192

This video tutorial is a follow-up to Nettut's "How to Scrape Web Pages with Node.js and jQuery", using cheerio instead of JSDOM + jQuery. This video shows how easy it is to use cheerio and how much faster cheerio is than JSDOM + jQuery.

Cheerio in the real world

Are you using cheerio in production? Add it to the wiki!

Sponsors

Does your company use Cheerio in production? Please consider sponsoring this project! Your help will allow maintainers to dedicate more time and resources to its development and support.

Headlining Sponsors

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Other Sponsors

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Backers

Become a backer to show your support for Cheerio and help us maintain and improve this open source project.

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License

MIT