diff --git a/frontend/my-materials.html b/frontend/my-materials.html
index e0f58e8..1bbee43 100644
--- a/frontend/my-materials.html
+++ b/frontend/my-materials.html
@@ -79,6 +79,7 @@
 <script src="/js/svg-sanitize.js"></script>
 <script src="/js/svg-draw.js"></script>
 <script>
+(function () {
   const _ip = LS.initPage() || {};
   const _canShare = !!(_ip.isTeacher || _ip.isAdmin);
 
@@ -412,6 +413,7 @@
   window.openShareModal = openShareModal;
 
   load();
+})();
 </script>
 </body>
 </html>