From 6799bd113a1c3ee4306316d612aeb30d1d1b9b75 Mon Sep 17 00:00:00 2001
From: Mike Cao <moocao@gmail.com>
Date: Tue, 9 Sep 2025 15:23:49 -0700
Subject: [PATCH] Allow async beforeSend function. Closes #3584

---
 src/tracker/index.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/tracker/index.js b/src/tracker/index.js
index 2d9dd18e..b2899e8b 100644
--- a/src/tracker/index.js
+++ b/src/tracker/index.js
@@ -143,7 +143,7 @@
     const callback = window[beforeSend];
 
     if (typeof callback === 'function') {
-      payload = callback(type, payload);
+      payload = await Promise.resolve(callback(type, payload));
     }
 
     if (!payload) return;