Comment by QuicksilverJohn

Basically, only the root record parsing is done in JS and then passed to unbound for resolution. Though it is possible to run a pure JS resolver, it's not really recommended.

There's also a more portable authoritative & recursive [resolver in C](https://github.com/handshake-org/hnsd).

Plus, the whole protocol for node communication and name resolution & proofs is so simple, that it's pretty easy to reimplement in any language.