doneit-web/src/firebase-messaging-sw.js

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 22 ', payload);

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

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


self.addEventListener('install', function(event) {
  self.skipWaiting();
  console.log('Installed', event);
});

self.addEventListener('activate', function(event) {
  console.log('Activated', event);
});

self.addEventListener('push', function(event) {  

  var uid = "EXISTS_IN_CORE.JS";
  var token = "ALSO_EXISTS_IN_CORE.JS";

  console.log("Push recieved - we need to know the uid and token here, from core.js");
});

self.addEventListener('message', function(event){
  var data = JSON.parse(event.data);

  console.log("SW Received Message:");
  console.log(data);

  self.userID = data.uid;
  self.userToken = data.token;

});

/* self.addEventListener('notificationclick', function(event) {
  console.log("Push Clicked ", event);
  // Enviar uma mensagem para o cliente (componente)
  self.clients.matchAll().then((clients) => {
    console.log("Push Clicked 2", clients);
    if (clients && clients.length) {
      clients.forEach((client) => {
        client.postMessage({ notificationClicked: true });
      });
    }
  });
}); */