From 059dfb7371dcd10dbce97f28c869ee94067a030b Mon Sep 17 00:00:00 2001
From: Ryan Hefner <hi@ryanhefner.com>
Date: Sun, 25 Aug 2019 13:36:49 -0400
Subject: [PATCH] Wrap all window references in type check for SSR useage

---
 src/GoogleMap.js | 18 +++++++++++-------
 1 file changed, 11 insertions(+), 7 deletions(-)

diff --git a/src/GoogleMap.js b/src/GoogleMap.js
index f87359dd..6cb17986 100644
--- a/src/GoogleMap.js
+++ b/src/GoogleMap.js
@@ -36,16 +36,18 @@ const CALLBACK_MAP = {
   'zoom_changed': 'onZoomChange',
 };
 
-window['reactMapsGoogleInstances'] = [];
-window['reactMapsGoogleInit'] = () => {
-  window['reactMapsGoogleInstances'].forEach(instance => instance());
-};
+if (typeof window !== 'undefined') {
+  window['reactMapsGoogleInstances'] = [];
+  window['reactMapsGoogleInit'] = () => {
+    window['reactMapsGoogleInstances'].forEach(instance => instance());
+  };
+}
 
 class GoogleMap extends Component {
   constructor(props) {
     super(props);
 
-    const scriptLoaded = window.google && window.google.maps && window.google.maps.Map
+    const scriptLoaded = typeof window !== 'undefined' && window.google && window.google.maps && window.google.maps.Map
       ? true
       : false;
 
@@ -56,11 +58,13 @@ class GoogleMap extends Component {
 
     this.onScriptLoad = this.onScriptLoad.bind(this);
     this.onScriptInit = this.onScriptInit.bind(this);
-
-    window['reactMapsGoogleInstances'].push(this.onScriptInit);
   }
 
   componentDidMount() {
+    if (typeof window !== 'undefined') {
+      window['reactMapsGoogleInstances'].push(this.onScriptInit);
+    }
+
     this.renderMap();
   }