diff --git a/packages/core/evaluate.mjs b/packages/core/evaluate.mjs
index e2a4585f..1434de22 100644
--- a/packages/core/evaluate.mjs
+++ b/packages/core/evaluate.mjs
@@ -4,8 +4,6 @@ Copyright (C) 2022 Strudel contributors - see <https://github.com/tidalcycles/st
 This program is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Affero General Public License for more details. You should have received a copy of the GNU Affero General Public License along with this program.  If not, see <https://www.gnu.org/licenses/>.
 */
 
-import { isPattern } from './index.mjs';
-
 export const evalScope = async (...args) => {
   const results = await Promise.allSettled(args);
   const modules = results.filter((result) => result.status === 'fulfilled').map((r) => r.value);
@@ -39,10 +37,7 @@ function safeEval(str, options = {}) {
 
 export const evaluate = async (code, transpiler, transpilerOptions) => {
   let meta = {};
-  //post to iframe parent (like Udels) if it exists...
-  if (typeof window !== 'undefined') {
-    window.parent?.postMessage(code);
-  }
+ 
   if (transpiler) {
     // transform syntactically correct js code to semantically usable code
     const transpiled = transpiler(code, transpilerOptions);
diff --git a/website/src/components/Udels/UdelsHeader.tsx b/website/src/components/Udels/UdelsHeader.jsx
similarity index 100%
rename from website/src/components/Udels/UdelsHeader.tsx
rename to website/src/components/Udels/UdelsHeader.jsx
diff --git a/website/src/repl/Repl.jsx b/website/src/repl/Repl.jsx
index dc7cf338..3b536c2f 100644
--- a/website/src/repl/Repl.jsx
+++ b/website/src/repl/Repl.jsx
@@ -90,6 +90,9 @@ export function Repl({ embedded = false }) {
       beforeEval: () => audioReady,
       afterEval: (all) => {
         const { code } = all;
+        //post to iframe parent (like Udels) if it exists...
+        window.parent?.postMessage(code);
+
         setLatestCode(code);
         window.location.hash = '#' + code2hash(code);
         setDocumentTitle(code);