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htmlparser2vsnokogiri

MIT 12 4 4,263
127.1 million (month) Aug 28 2011 9.1.0(2 months ago)
6,097 21 128 MIT
1.16.3(21 days ago) Jul 25 2009 4.4 million (month)

htmlparser2 is a Node.js library for parsing HTML and XML documents. It works by building a tree of elements, similar to the Document Object Model (DOM) in web browsers. This allows you to easily traverse and manipulate the structure of the document.

htmlparser2 is a low-level html tree parser but it can still be useful in web scraping as it's a powerful tool for HTML restructuring and serialization.

Nokogiri is a Ruby gem that provides a simple and powerful way to parse and search XML and HTML documents. It is built on top of the underlying C library libxml2, which is known for its speed and reliability.

Nokogiri provides a simple and intuitive API for parsing and searching XML and HTML documents, and it is widely used in the Ruby ecosystem for web scraping and data extraction.

One of the main features of Nokogiri is its ability to search and navigate through XML and HTML documents using a CSS or XPath selectors.

Nokogiri also provides a variety of other features that can simplify the process of working with XML and HTML documents. It can automatically handle character encodings and normalize documents, it can parse and search large documents with low memory usage, and it can validate documents against a DTD or schema.

Highlights


css-selectorsxpathpopular

Example Use


const htmlparser = require("htmlparser2");
const parser = new htmlparser.Parser({
    onopentag: (name, attribs) => {
        console.log(`Opening tag: ${name}`);
    },
    ontext: (text) => {
        console.log(`Text: ${text}`);
    },
    onclosetag: (name) => {
        console.log(`Closing tag: ${name}`);
    }
}, {decodeEntities: true});

const html = "<p>Hello, <b>world</b>!</p>";
parser.write(html);
parser.end();
require 'nokogiri'

html_string = '<html><head><title>Page Title</title></head><body><h1 class="header-class">Hello World!</h1><p>This is a sample webpage.</p></body></html>'

# Parse the HTML string
doc = Nokogiri::HTML(html_string)

# Extract the class attribute of h1 tag using CSS selector
h1_class = doc.css("h1")[0]['class']
# or XPath
h1_class = doc.xpath("//h1")[0]['class']
puts "H1 class: #{h1_class}"

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