Does anyone have a working SSR solution with JVM backend? What’s the current state of the art.

I tried with Nashorn (won’t load, complains about Map an ES6 feature), Rhino (NPE while compiling the JS source), J2V8 and clj-chrome-devtools require external native components

Node works, no idea about JVM solutions. Probably doesn't work currently. Best solution could be to implement Reagent-hiccup renderer in Clojure, similar to what Rum does: https://github.com/tonsky/rum/blob/gh-pages/src/rum/server_render.clj, that would require trying to run React in JVM.

Yes, but that doesn’t work if you use 3rd party JS React components

Oh right.

how would a server side renderer know what markup they generate?

Nashorn should have ES6 features in Java 9 or 10, so maybe that would help with running React there

Yes, I think I’ll try a later JDK… if I get it working, I’ll blog something about it

And React 15 might work, I think they started using those features in React 16

Oh, ok… I’ll try that too

Anyone played around with proton-native? Wonder how it fairs with Reagent https://proton-native.js.org/#/?id=proton-native