If you want an open-source text editor based on Node.js, Light Table might interest you. (Light Table itself is written in ClojureScript, which is a bit idiosy

If you want an open-source text editor based on Node.js, Light Table might interest you. (Light Table itself is written in ClojureScript, which is a bit idiosyncratic, but it's hardly worse than Elisp, and anyway you can write plugins in normal JavaScript.)