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

If you use server-side javascript it is possible. You should take a look at node.js

And an example of a crawler can be found in the link bellow:

http://www.colourcoding.net/blog/archive/2010/11/20/a-node.js-web-spider.aspx