is it possible to write web crawler in javascript?

Question

I want to crawl the page and check for the hyperlinks in that respective page and also follow those hyperlinks and capture data from the page

Answer 1

yes it is possible

1. Use NODEJS (its server side JS)
2. There is NPM (package manager that handles 3rd party modules) in nodeJS
3. Use PhantomJS in NodeJS (third party module that can crawl through websites is PhantomJS)