use esm script

front/views/layout.hbs

@@ -82,9 +82,13 @@
       = window.dataLayer || []; function gtag(){dataLayer.push(arguments);}
       gtag('js', new Date()); gtag('config', 'G-56Y0W3EPT3'); }
     </script>
-    <script async src="https://esm.sh/@huggingface/space-header"></script>
-    <script>
-      window.init("banana-projects/transformer-autocomplete") })();
+    <script type="importmap">
+      { "imports": { "space-header": "https://esm.sh/@huggingface/space-header"
+      } }
+    </script>
+    <script type="module">
+      import {init} from 'space-header';
+      init("banana-projects/transformer-autocomplete")
     </script>
   </body>
 </html>