Maybe someone could make Rhino[0] run in this, so we can run Javascript in Java in Javascript! Yo dawg!
[0]: https://developer.mozilla.org/en-US/docs/Mozilla/Projects/Rh...
[0]: https://developer.mozilla.org/en-US/docs/Mozilla/Projects/Rh...
(I'm the primary author of Doppio.)
If that sounds like fun, I take pull requests [0]. :)