text: importScripts("https://www.gstatic.com/firebasejs/7.14.5/firebase-app.js");
  importScripts("https://www.gstatic.com/firebasejs/7.14.5/firebase-messaging.js");
  
  // Your web app's Firebase configuration
  var firebaseConfig = {
  	apiKey: "AIzaSyCLFQbE-OvUvsyjZprBqu7K9I8QroA8B80",
  	authDomain: "web-notification-37dfe.firebaseapp.com",
  	databaseURL: "https://web-notification-37dfe.firebaseio.com",
  	projectId: "web-notification-37dfe",
  	storageBucket: "web-notification-37dfe.appspot.com",
  	messagingSenderId: "1033144298619",
  	appId: "1:1033144298619:web:9120de536ae026157a86de",
  	measurementId: "G-RW3E5DC3NY"
  };
  // Initialize Firebase
  firebase.initializeApp(firebaseConfig);
  // Retrieve Firebase Messaging object.
  const messaging = firebase.messaging();