From 4a91d24c603a3afcf5e23b6760ee68170dd7641e Mon Sep 17 00:00:00 2001
From: Billy Vong <billyvg@users.noreply.github.com>
Date: Mon, 29 Jan 2024 19:12:35 -0500
Subject: [PATCH] fix(replayer): `<style>` node `rules` attr can be undefined

Not sure why this happens.
Fixes JAVASCRIPT-2P6F
---
 packages/rrweb/src/replay/index.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/packages/rrweb/src/replay/index.ts b/packages/rrweb/src/replay/index.ts
index 856a14c782..4df549ca34 100644
--- a/packages/rrweb/src/replay/index.ts
+++ b/packages/rrweb/src/replay/index.ts
@@ -1299,7 +1299,7 @@ export class Replayer {
           else if (d.id)
             (
               this.virtualDom.mirror.getNode(d.id) as RRStyleElement | null
-            )?.rules.push(d);
+            )?.rules?.push(d);
         } else this.applyStyleSheetMutation(d);
         break;
       }