Initial version to monorepo-setup to start experimenting with, featuring a fork of @babel JSX-transformation, and a crude VDOM>DOM rendering-step. The Custom-Elements part is just a placeholder at this point but ready to be populated with base-classes and decorators.

rollup.config.js

@@ -0,0 +1,32 @@
+import babel from 'rollup-plugin-babel';
+import resolve from 'rollup-plugin-node-resolve';
+import commonjs from 'rollup-plugin-commonjs';
+import { terser } from 'rollup-plugin-terser';
+import copy from "rollup-plugin-copy";
+import sass from "rollup-plugin-sass";
+
+// `npm run build` -> `production` is true
+// `npm run dev` -> `production` is false
+const production = !process.env.ROLLUP_WATCH;
+
+export default {
+    input: 'test/index.jsx',
+    output: {
+        file: 'public/index.js',
+        format: 'iife', // immediately-invoked function expression — suitable for <script> tags
+        sourcemap: true
+    },
+    plugins: [
+        sass(),
+        babel(), // babel
+        resolve(), // node_modules
+        commonjs(), // CJS-modules
+        production && terser(), // minify, but only in production
+        copy({
+            targets: [
+                { src: 'test/index.html', dest: 'public' }
+            ],
+            copyOnce: true
+        })
+    ]
+};