From 8ec265492c01798b52b007a1be94658f3420a3eb Mon Sep 17 00:00:00 2001
From: Oleg Korshul <Oleg.Korshul@onlyoffice.com>
Date: Tue, 7 Feb 2023 15:11:46 +0300
Subject: [PATCH] Fix bug with double messages from editor

---
 apps/api/documents/api.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/apps/api/documents/api.js b/apps/api/documents/api.js
index a918760138..96c9dfed50 100644
--- a/apps/api/documents/api.js
+++ b/apps/api/documents/api.js
@@ -388,7 +388,7 @@
             if ( msg ) {
                 if ( msg.type === "onExternalPluginMessage" ) {
                     _sendCommand(msg);
-                } else if (msg.type === "onExternalPluginMessageCallback") {
+                } else if ((window.parent !== window) && msg.type === "onExternalPluginMessageCallback") {
                     postMessage(window.parent, msg);
                 } else
                 if ( msg.frameEditorId == placeholderId ) {