Now to take a look at how I scraped reddit in about 20 lines of code. You can do that by either running npm install -save cheerioĪnother option is copying over the dependencies and adding them to a package.json file and then running npm install. To create a new Node.js project with package.json file in it, you need to create a new folder, go to it, then run npm init and give a few details as needed, like in the following screenshot: mkdir web-scrapping cd web-scrapping npm init. You'll need to install just two Node.js dependencies. If you're not familiar with them take a look at the paragraph here.
Make sure you have Node.js and npm installed. Alternatively it's easy to separate each entry with a comma or some other delimiter if you wanted to open the results in Excel or a spreadsheet.
request-promise It is a simple HTTP client that you can use to make quick and easy HTTP calls. It helps to select, edit and view DOM elements. cheerio It is a Javascript technology used for extracting data from websites. txt file named reddit.txt separating each entry on a new line. For web scraping using Node.js, we will be using the following two npm modules. It firsts visits and then collects all the post titles, the score, and the username of the user that submitted each post. Web scraping JavaScript has a number of advantages. Node.js is a fast-growing, easy-to-use runtime environment made for JavaScript, which makes it perfect for web scraping JavaScript efficiently and with a low barrier to entry.
Web Scraping Redditįirst I'll show you what it does and then explain it. The following guide on web scraping with JavaScript and Node.js will enable you to scrape virtually any page.
Web scraping with nodejs how to#
txt file, but in a future post I'll show you how to insert them into a database.Įach scraper takes about 20 lines of code and they're pretty easy to modify if you want to scrape other elements of the site or web page. For now, I'll just append the results of web scraping to a. Following up on my popular tutorial on how to create an easy web crawler in Node.js I decided to extend the idea a bit further by scraping a few popular websites.
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