notification.php

  <!-- Insert these scripts at the bottom of the HTML, but before you use any Firebase services -->

  <!-- Firebase App (the core Firebase SDK) is always required and must be listed first -->
  <script src="https://www.gstatic.com/firebasejs/7.12.0/firebase-app.js"></script>
  <script src="https://www.gstatic.com/firebasejs/7.12.0/firebase-messaging.js"></script>

  <!-- If you enabled Analytics in your project, add the Firebase SDK for Analytics -->
  <!--<script src="https://www.gstatic.com/firebasejs/7.12.0/firebase-analytics.js"></script>
-->
  <!-- Add Firebase products that you want to use -->
  <script src="https://www.gstatic.com/firebasejs/7.12.0/firebase-auth.js"></script>
  <script src="https://www.gstatic.com/firebasejs/7.12.0/firebase-firestore.js"></script>
  <script>
    // Your web app's Firebase configuration
    var firebaseConfig = {
      apiKey: "AIzaSyCmIr87Ihp8nXtHrKWZyeH1GcvFrHxmtJw",
      authDomain: "alnahr-3a32e.firebaseapp.com",
      databaseURL: "https://alnahr-3a32e.firebaseio.com",
      projectId: "alnahr-3a32e",
      storageBucket: "alnahr-3a32e.appspot.com",
      messagingSenderId: "410160983978",
      appId: "1:410160983978:web:22a64081a20724ec9185d3",
      measurementId: "G-QYSFSMTB8R"
    };
    // Initialize Firebase
    firebase.initializeApp(firebaseConfig);
    //  firebase.analytics();
    const messaging = firebase.messaging();
    messaging.requestPermission()
      .then(function() {
        console.log("Ture");
        return messaging.getToken();
      })
      .then(function(token) {
        console.log(token);
      })
      .catch(function(err) {
        console.log("error")
      });
    messaging.onMessage(function(payload) {
      console.log('onmessage', payload);
    });
  </script>