Web scraping with cheerio

Web scraping means extracting data from websites. This post covers extracting data from the page's HTML tags.

Prerequisites

• cheerio package is installed

• HTML page is retrieved via an HTTP client

Usage

• create a scraper object with load method by passing HTML content as an argument
  • set decodeEntities option to false to preserve encoded characters (like &) in their original form

  const $ = load('<div><!-- HTML content --></div>', { decodeEntities: false });

• find DOM elements by using CSS-like selectors

  const items = $('.item');

• iterate through found elements using each method

  items.each((index, element) => {
    // ...
  });

access element content using specific methods

• text $(element).text()
• HTML $(element).html()
• attributes
  • all $(element).attr()
  • specific one $(element).attr('href')
• child elements
  • first $(element).first()
  • last $(element).last()
  • all $(element).children()
  • specific one $(element).find('a')
• siblings
  • previous $(element).prev()
  • next $(element).next()

Disclaimer

Please check the website's terms of service before scraping it. Some websites may have terms of service that prohibit such activity.

Related reading

• Web scraping with jsdom

Demo

The demo with the mentioned examples is available here.