feat: add offline/online events

Author: Jacob Klapwijk

src/__tests__/events.js

@@ -76,6 +76,11 @@ const eventTypes = [
     events: ['load', 'error'],
     elementType: 'img',
   },
+  {
+    type: '',
+    events: ['offline', 'online'],
+    elementType: 'window',
+  },
   {
     type: '',
     events: ['load', 'error'],

src/event-map.js

@@ -363,6 +363,15 @@ export const eventMap = {
     EventType: 'PopStateEvent',
     defaultInit: {bubbles: true, cancelable: false},
   },
+  // window events
+  offline: {
+    EventType: 'Event',
+    defaultInit: {bubbles: false, cancelable: false},
+  },
+  online: {
+    EventType: 'Event',
+    defaultInit: {bubbles: false, cancelable: false},
+  },
 }
 
 export const eventAliasMap = {