React/Nashorn (Java's JavaScript interpreter) proof-of-concept. yarn && yarn build && yarn start

.babelrc

{
  "presets": ["env"],
  "plugins": ["transform-react-jsx"]
}

index.js

import "babel-polyfill";
import React from "react";
import ReactDOMServer from "react-dom/server";

global.console = { log: print };

console.log(ReactDOMServer.renderToString(<div>hi</div>));

package.json

{
  "name": "nashorn-react",
  "version": "1.0.0",
  "main": "index.js",
  "license": "MIT",
  "dependencies": {
    "babel-polyfill": "^6.26.0",
    "react": "^16.2.0",
    "react-dom": "^16.2.0"
  },
  "devDependencies": {
    "babel-core": "^6.26.0",
    "babel-loader": "^7.1.2",
    "babel-plugin-transform-react-jsx": "^6.24.1",
    "babel-preset-env": "^1.6.1",
    "webpack": "^3.10.0"
  },
  "scripts": {
    "build": "webpack",
    "build:watch": "webpack --watch",
    "start": "jjs bundle.js"
  }
}

webpack.config.js

module.exports = {
  entry: "./index.js",
  output: {
    filename: "bundle.js"
  },
  module: {
    rules: [
      { test: /\.js$/, exclude: /node_modules/, loader: "babel-loader" }
    ]
  }
};