--- a/rollup.config.js	Wed Jan 01 12:55:35 2020 -0800
+++ b/rollup.config.js	Wed Jan 01 19:39:57 2020 -0800
@@ -2,19 +2,24 @@
 import commonjs from '@rollup/plugin-commonjs';
 import resolve from "@rollup/plugin-node-resolve";
 import typescript from "rollup-plugin-typescript2";
+import replace from '@rollup/plugin-replace';
 
 export default {
     input: "src/index.ts",
     output: {
         file: "build/bundle.js",
-        format: "esm",
-        intro: "const global = window;"
+        format: "cjs", // just for the namedExports hack
+        intro: "const global = window;",
+        
     },
+    // only for final build. demo page does need these modules, so I guess this file should observe some kind of build mode.
+    external: ['@polymer/polymer','lit-html','@polymer/decorators','n3','jsonld'],
     plugins: [
         builtins(),
         resolve({
             extensions: [".js", ".ts"],
-            browser: true
+            browser: true,
+            only: ['streamed-graph']
         }),
         typescript(),
         commonjs({
@@ -22,5 +27,6 @@
                 'jsonld': ['expand'], // fixes "expand is not exported by node_modules/jsonld/lib/index.js"
             }
         }),
+      
     ]
 };