This is a fantastic video from Smitha Milli, which will help you get started with web scraping using Node.js.
Also, there are a few interesting projects that might need to check out in the future.
1. Nokogiri in Ruby
I also modified her code a little bit and pushed my own code to my github account. It will save the raw html along with other interesting attributes to a plain file in json format. And people can extract the part they want in the future.