diff --git a/_javascript/modules/components/toc/toc-mobile.js b/_javascript/modules/components/toc/toc-mobile.js
index 48b372d..8d717dd 100644
--- a/_javascript/modules/components/toc/toc-mobile.js
+++ b/_javascript/modules/components/toc/toc-mobile.js
@@ -62,7 +62,11 @@ export class TocMobile {
     activeItem.scrollIntoView({ block: 'center' });
   }
 
-  static hidePopup() {
+  static hidePopup(event) {
+    if (event?.type === 'cancel') {
+      event.preventDefault();
+    }
+
     if (!$popup.open) {
       return;
     }