There are other ways to run live js on a page. It just has to do with how you load the pages. If it's just an http request to get the body it won't work, but using a headless browser will do the trick just fine, and without too much async headache.

Maybe in the future by implementing a basic DOM structure.

https://github.com/rc0x03/node-osmosis/issues/4

nope, you need something like PhantomJS for that.