Follow site changes?

Question

Parsing

Basically, I want to create a javascript script to keep track of changes to another site, let's say a news site. Run the script through the command line. Not through a browser.
How to do it ? Make requests to the site every N seconds ? Or is there some kind of script that monitors the site? Socket s suitable for this? I'm simple in sockets 0

Answer 1

setInterval + cheerio + XMLHttpRequest