From 22d7fa0f575802c9efe1578721d7f5207eabe904 Mon Sep 17 00:00:00 2001
From: Ian Mckay <contact@ianmckay.com.au>
Date: Sun, 17 Mar 2024 16:34:33 +1100
Subject: [PATCH] Throw away errors from unrelated window messages #361

---
 js/app.js | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/js/app.js b/js/app.js
index b929e4ec..a44fa836 100755
--- a/js/app.js
+++ b/js/app.js
@@ -1398,7 +1398,9 @@ $(document).ready(function(){
     });
 
     window.addEventListener('message', (message) => {
-        var evt = JSON.parse(message.data);
+        try {
+            var evt = JSON.parse(message.data);
+        } catch(err) {};
         if (evt['event'] == "init") {
             clearDiagram();
         } else if (evt['event'] == "export") {