BooJS supports the browser DOM. You can call `document` in BooJS but not NodeJS. You can't import arbitrary browser javascript libraries into NodeJS but you can with BooJS. It's purpose is to assists with unit tests in a sane manner but it's great for other random things; reminiscent of netcat.
It seems to me, that something similar could be constructed with node's PhantomJS bindings, but not sure that there would be much less overhead... it does feel a little awkward having the Ruby dependency...
