From 981fe22cd49b2502c050ac90f5e187e67e3ca972 Mon Sep 17 00:00:00 2001
From: "sentry[bot]" <39604003+sentry[bot]@users.noreply.github.com>
Date: Tue, 8 Sep 2026 22:47:22 +0000
Subject: [PATCH] fix(browser): Guard ResizeObserver for older Safari versions

---
 src/ui/TruncatedMessage/hooks/useTruncation.ts | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/ui/TruncatedMessage/hooks/useTruncation.ts b/src/ui/TruncatedMessage/hooks/useTruncation.ts
index 2b790fa567..eb489081ee 100644
--- a/src/ui/TruncatedMessage/hooks/useTruncation.ts
+++ b/src/ui/TruncatedMessage/hooks/useTruncation.ts
@@ -24,7 +24,11 @@ export const useTruncation = () => {
     }
   }, [])
 
-  const [resizeObs] = useState(() => new ResizeObserver(handleResize))
+  const [resizeObs] = useState<ResizeObserver | null>(() =>
+    typeof ResizeObserver !== 'undefined'
+      ? new ResizeObserver(handleResize)
+      : null
+  )
 
   useLayoutEffect(() => {
     if (!resizeObs) return