add validation to worker

src/app/home/home.page.ts

@@ -145,6 +145,7 @@ export class HomePage implements OnInit {
 
   ngOnInit() {
 
+    if ("serviceWorker" in navigator) {
       navigator.serviceWorker.onmessage = (event) => {
         console.log('Mensagem recebida do Service Worker:', event.data.data);
         let object = {
@@ -158,6 +159,8 @@ export class HomePage implements OnInit {
           // Implemente ações adicionais conforme necessário
         }
       };
+    }
+
 
     this.logDeviceInfo();