From 517c30c246b61274ee37787f512720b4a73b8398 Mon Sep 17 00:00:00 2001
From: Mo Bitar <me@bitar.io>
Date: Thu, 12 Jul 2018 16:28:30 -0500
Subject: [PATCH] Ensure postMessage is for us

---
 app/assets/javascripts/app/services/componentManager.js | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/app/assets/javascripts/app/services/componentManager.js b/app/assets/javascripts/app/services/componentManager.js
index 3564f1d6a..88acc5bb2 100644
--- a/app/assets/javascripts/app/services/componentManager.js
+++ b/app/assets/javascripts/app/services/componentManager.js
@@ -46,7 +46,11 @@ class ComponentManager {
       if(this.loggingEnabled) {
         console.log("Web app: received message", event);
       }
-      this.handleMessage(this.componentForSessionKey(event.data.sessionKey), event.data);
+
+      // Make sure this message is for us
+      if(event.data.sessionKey) {
+        this.handleMessage(this.componentForSessionKey(event.data.sessionKey), event.data);
+      }
     }.bind(this), false);
 
     this.modelManager.addItemSyncObserver("component-manager", "*", (allItems, validItems, deletedItems, source, sourceKey) => {