From 995cb5c43b7e0e7b9925e30597722d3a9cda9cdc Mon Sep 17 00:00:00 2001
From: vivgoodrich <vivian.goodrich@gmail.com>
Date: Thu, 17 Aug 2023 13:48:01 -0600
Subject: [PATCH] initial

---
 libs/features/personalization/preview.js | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/libs/features/personalization/preview.js b/libs/features/personalization/preview.js
index 73767d2898..edc7050cc2 100644
--- a/libs/features/personalization/preview.js
+++ b/libs/features/personalization/preview.js
@@ -234,9 +234,11 @@ function createPreviewPill(manifests) {
 function addMarkerData(manifests) {
   manifests.forEach((manifest) => {
     manifest?.selectedVariant.useblockcode?.forEach((item) => {
-      document.querySelectorAll(`.${item.selector}`).forEach((el) => {
-        el.dataset.codeManifestId = manifest.manifest;
-      });
+      if (item.selector) {
+        document.querySelectorAll(`.${item.selector}`).forEach((el) => {
+          el.dataset.codeManifestId = manifest.manifest;
+        });
+      }
     });
     manifest?.selectedVariant.updatemetadata?.forEach((item) => {
       if (item.selector === 'gnav-source') {