jsdomvssimple-html-dom
jsdom is a pure JavaScript implementation of web standards, notably the WHATWG DOM and HTML standards, for use with Node.js. It simulates a browser environment in Node.js, allowing you to parse HTML, manipulate the DOM, and interact with web pages using the same APIs available in web browsers.
Key features for web scraping:
- Full DOM implementation Provides document.querySelector, document.querySelectorAll, and other standard DOM methods for traversing and manipulating parsed HTML.
- Browser-like environment Simulates window, document, navigator, and other browser globals, enabling code that was written for browsers to run in Node.js.
- JavaScript execution Can execute JavaScript embedded in HTML pages, including external scripts, making it possible to process pages that generate content dynamically (though much slower than a real browser).
- Standards-compliant parsing Uses the same HTML parsing algorithm as web browsers (the WHATWG HTML specification), ensuring accurate handling of malformed HTML.
- Cookie support Implements the tough-cookie library for cookie handling across requests.
For web scraping, jsdom is useful when you need more than simple CSS selector matching (what cheerio provides) but don't need a full browser. It's ideal for parsing complex HTML and running simple inline scripts without the overhead of Playwright or Puppeteer. However, for heavy JavaScript-rendered pages, a real browser automation tool is recommended.
Simple HTML DOM Parser is a lightweight PHP library for parsing and manipulating HTML documents using a jQuery-like syntax. It is one of the most widely used HTML parsers in the PHP ecosystem, known for its simplicity and low learning curve.
Key features include:
- jQuery-like selectors Find elements using CSS selectors similar to jQuery: find('#id'), find('.class'), find('div > p'), etc.
- Easy element access Access element attributes, inner text, and inner HTML with simple property access: $element->plaintext, $element->href, $element->innertext.
- DOM manipulation Modify element attributes, text content, and HTML. Add or remove elements from the document tree.
- File and string parsing Parse HTML from strings, local files, or URLs directly.
- Nested element traversal Navigate parent, child, and sibling elements with built-in traversal methods.
- Memory-friendly Designed to handle large HTML documents efficiently with explicit memory cleanup.
Simple HTML DOM is best suited for quick scraping tasks and small projects where simplicity is more important than performance. For large-scale or performance-critical applications, consider using PHP's built-in DOMDocument or Symfony's DomCrawler which offer better performance and standards compliance.
Highlights
Example Use
Product A
$10.99Product B
$24.99
</body>
`;
const dom = new JSDOM(html); const document = dom.window.document;
// Use standard DOM APIs to extract data
const products = document.querySelectorAll('.product');
products.forEach(product => {
const name = product.querySelector('h2').textContent;
const price = product.querySelector('.price').textContent;
console.log(${name}: ${price});
});
// Fetch and parse a remote page JSDOM.fromURL('https://example.com').then(dom => { const title = dom.window.document.title; console.log('Page title:', title); }); ```
```php
load('https://example.com'); // Or parse from a string $html = new HtmlDocument('Hello World