fix

Author: yangfan36

web-push/example3/index.html

@@ -13,7 +13,7 @@
     </div>
 
     <script src="https://www.gstatic.com/firebasejs/9.14.0/firebase-app-compat.js"></script>
-    <!-- <script src="https://www.gstatic.com/firebasejs/9.14.0/firebase-messaging-compat.js"></script> -->
+    <script src="https://www.gstatic.com/firebasejs/9.14.0/firebase-messaging-compat.js"></script>
     <script src="https://unpkg.com/vconsole@latest/dist/vconsole.min.js"></script>
 
     <script>