did a thing, struff works now :o

js/old/admin/index.js

@@ -0,0 +1,18 @@
+import AdminApplication from './AdminApplication';
+
+const app = new AdminApplication();
+
+// Backwards compatibility
+window.app = app;
+
+export { app };
+
+// Export public API
+
+
+// Export compat API
+import compat from './compat';
+
+compat.app = app;
+
+export { compat };