From 57a940afac0bdd14cd82937915d53110b5311673 Mon Sep 17 00:00:00 2001
From: Francesco Novy <francesco.novy@sentry.io>
Date: Fri, 13 Oct 2023 13:05:26 +0200
Subject: [PATCH] fix: Fix checking for `patchTarget` in
 `initAdoptedStyleSheetObserver` (#1327)

---
 .changeset/calm-oranges-sin.md        |  5 +++++
 packages/rrweb/src/record/observer.ts | 10 ++++++----
 2 files changed, 11 insertions(+), 4 deletions(-)
 create mode 100644 .changeset/calm-oranges-sin.md

diff --git a/.changeset/calm-oranges-sin.md b/.changeset/calm-oranges-sin.md
new file mode 100644
index 0000000000..a1449698e4
--- /dev/null
+++ b/.changeset/calm-oranges-sin.md
@@ -0,0 +1,5 @@
+---
+'rrweb': patch
+---
+
+fix: Fix checking for `patchTarget` in `initAdoptedStyleSheetObserver`
diff --git a/packages/rrweb/src/record/observer.ts b/packages/rrweb/src/record/observer.ts
index 02a9ae8669..c6b38cbb96 100644
--- a/packages/rrweb/src/record/observer.ts
+++ b/packages/rrweb/src/record/observer.ts
@@ -900,10 +900,12 @@ export function initAdoptedStyleSheetObserver(
     host.nodeName === '#document'
       ? (host as Document).defaultView?.Document
       : host.ownerDocument?.defaultView?.ShadowRoot;
-  const originalPropertyDescriptor = Object.getOwnPropertyDescriptor(
-    patchTarget?.prototype,
-    'adoptedStyleSheets',
-  );
+  const originalPropertyDescriptor = patchTarget?.prototype
+    ? Object.getOwnPropertyDescriptor(
+        patchTarget?.prototype,
+        'adoptedStyleSheets',
+      )
+    : undefined;
   if (
     hostId === null ||
     hostId === -1 ||