Non-browser emulation of JavaScript - is it possible?

Question

I have a new project I am working on that involves fetching a webpage, (using PHP and cURL) parsing the HTML and javascript out of it and then handling the data in the resul

Answer 1

Previously asked here: headless internet browser?

At Mozilla we get this question a lot. There's no good answer. What you want is a software library that implements pretty much everything a browser needs to do (at least as far as networking, JavaScript, HTML parsing, and the DOM), but with no display.

The closest thing I know of is HTMLUnit (in Java).