From b436f331c79fd5c2d6b3d1e670a6df22f97625e2 Mon Sep 17 00:00:00 2001
From: Sahitya Chandra <sahityajb@gmail.com>
Date: Fri, 27 Mar 2026 17:20:35 +0530
Subject: [PATCH] fix: guard against document being undefined in embed-iframe
 informAboutScroll (#28596)

* fix: guard against document being undefined in informAboutScroll to fix flaky test

* fix: update comment to not reference test environment
---
 packages/embeds/embed-core/src/embed-iframe/lib/utils.ts | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/packages/embeds/embed-core/src/embed-iframe/lib/utils.ts b/packages/embeds/embed-core/src/embed-iframe/lib/utils.ts
index 1884b95225..f8a70d68eb 100644
--- a/packages/embeds/embed-core/src/embed-iframe/lib/utils.ts
+++ b/packages/embeds/embed-core/src/embed-iframe/lib/utils.ts
@@ -66,6 +66,10 @@ export function keepParentInformedAboutDimensionChanges({ embedStore }: { embedS
   let isInitialDimensionPass = true;
   let isWindowLoadComplete = false;
   runAsap(function informAboutScroll() {
+    // Can't inform parent about dimensions if document doesn't exist
+    if (typeof document === "undefined") {
+      return;
+    }
     if (document.readyState !== "complete") {
       // Wait for window to load to correctly calculate the initial scroll height.
       runAsap(informAboutScroll);