doneit-web/firebase-messaging-sw.js

if ("serviceWorker" in navigator) {
  navigator.serviceWorker
    .register("./firebase-messaging-sw.js")
    .then(function(registration) {
      console.log("Registration successful, scope is:", registration.scope);
      messaging.getToken({vapidKey: 'BEuyzkUKcx4FSs-6GaIz_si2oV5Ut7e5ZEtcrVvr5L_tMVWZtS1NTqdtQkih5QCt2FZKuRUxZIaLm5GaxI6nJEw', serviceWorkerRegistration : registration })
        .then((currentToken) => {
          if (currentToken) {
            console.log('current token for client: ', currentToken);
  
            // Track the token -> client mapping, by sending to backend server
            // show on the UI that permission is secured
          } else {
            console.log('No registration token available. Request permission to generate one.');
  
            // shows on the UI that permission is required 
          }
        }).catch((err) => {
          console.log('An error occurred while retrieving token. ', err);
          // catch error while creating client token
        });  
      })
      .catch(function(err) {
        console.log("Service worker registration failed, error:"  , err );
    }); 
  }
// Scripts for firebase and firebase messaging


/* importScripts('https://www.gstatic.com/firebasejs/8.2.0/firebase-app.js');
importScripts('https://www.gstatic.com/firebasejs/8.2.0/firebase-messaging.js');

// Initialize the Firebase app in the service worker by passing the generated config
var firebaseConfig = {
    apiKey: "AIzaSyAAdHmTFznCMerdT99nrewJgISRvtxPqoY",
    authDomain: "gabinete-digital-2020.firebaseapp.com",
    databaseURL: "https://gabinete-digital-2020.firebaseio.com",
    projectId: "gabinete-digital-2020",
    storageBucket: "gabinete-digital-2020.appspot.com",
    messagingSenderId: "800733765231",
    appId: "1:800733765231:web:28e7792ab150006513779a",
    measurementId: "G-8QN4BLZ8XK"
};

firebase.initializeApp(firebaseConfig);

// Retrieve firebase messaging
const messaging = firebase.messaging();

messaging.onBackgroundMessage(function(payload) {
  console.log('Received background message ', payload);

  const notificationTitle = payload.notification.title;
  const notificationOptions = {
    body: payload.notification.body,
  };

  self.registration.showNotification(notificationTitle,
    notificationOptions);
}); */