Merge pull request #65 from nik0kin/feature/check-for-window

check for existence of window before using it

Author: dkanada

src/apiClient.js

@@ -3872,7 +3872,7 @@ function getRemoteImagePrefix(instance, options) {
 }
 
 function normalizeImageOptions(instance, options) {
-    let ratio = window.devicePixelRatio || 1;
+    let ratio = window && window.devicePixelRatio || 1;
 
     if (ratio) {
         if (options.minScale) {

src/appStorage.js

@@ -17,7 +17,7 @@ function onCacheOpened(result) {
 class AppStore {
     constructor() {
         try {
-            if (self.caches) {
+            if (self && self.caches) {
                 caches.open('embydata').then(onCacheOpened.bind(this));
             }
         } catch (err) {

src/connectionManager.js

@@ -524,7 +524,7 @@ export default class ConnectionManager {
                     resolve(servers);
                 };
 
-                if (window.NativeShell && typeof window.NativeShell.findServers === 'function') {
+                if (window && window.NativeShell && typeof window.NativeShell.findServers === 'function') {
                     window.NativeShell.findServers(1e3).then(onFinish, function () {
                         onFinish([]);
                     });