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.

packages/csx-custom-elements/rollup.config.js

@@ -0,0 +1,30 @@
+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 json from "rollup-plugin-json";
+
+// `npm run build` -> `production` is true
+// `npm run dev` -> `production` is false
+const production = !process.env.ROLLUP_WATCH;
+
+export default {
+    input: 'src/index.js',
+    output: {
+        file: 'dist/index.js',
+        format: 'cjs', // immediately-invoked function expression — suitable for <script> tags
+        sourcemap: true
+    },
+    plugins: [
+        json(), // Add json support (sadly in rollup we have to do this explicity, despite the NodeJS algorithm supporitng this by defulat
+        babel(), // babel (the reason we're doing all of this, babel transpiling)
+        resolve({// node_modules (again we have to add support in rollup for something that is NodeJS default)
+        }),
+        commonjs({ // CJS-modules (require-style bundle support, again something rollup doesnt handle by default)
+        }),
+        production && terser() // minify, but only in production
+    ],
+    external: [
+    
+    ]
+};