title: Cannot read properties of undefined (reading 'app')
body: <p>Im trying to implement the firebase SDK to my Flutter web project.</p>
  <p>But as i try to start to application the following error appear:</p>
  <pre><code>TypeError: Cannot read properties of undefined (reading 'app')
      at Object.app$ [as app] (http://localhost:49235/packages/firebase_core_web/src/interop/core.dart.lib.js:31:101)
      at initializeApp (http://localhost:49235/packages/firebase_core_web/firebase_core_web.dart.lib.js:108:25)
      at initializeApp.next (&lt;anonymous&gt;)
      at runBody (http://localhost:49235/dart_sdk.js:39250:34)
      at Object._async [as async] (http://localhost:49235/dart_sdk.js:39281:7)
      at firebase_core_web.FirebaseCoreWeb.new.initializeApp (http://localhost:49235/packages/firebase_core_web/firebase_core_web.dart.lib.js:85:20)
      at initializeApp (http://localhost:49235/packages/firebase_core/firebase_core.dart.lib.js:104:59)
      at initializeApp.next (&lt;anonymous&gt;)
      at runBody (http://localhost:49235/dart_sdk.js:39250:34)
      at Object._async [as async] (http://localhost:49235/dart_sdk.js:39281:7)
      at Function.initializeApp (http://localhost:49235/packages/firebase_core/firebase_core.dart.lib.js:103:20)
      at main$ (http://localhost:49235/packages/oikos_web_ec/src/widgets/modals/links/delteLink.dart.lib.js:26076:36)
      at main$.next (&lt;anonymous&gt;)
      at runBody (http://localhost:49235/dart_sdk.js:39250:34)
      at Object._async [as async] (http://localhost:49235/dart_sdk.js:39281:7)
      at main$ (http://localhost:49235/packages/oikos_web_ec/src/widgets/modals/links/delteLink.dart.lib.js:26074:18)
      at main (http://localhost:49235/web_entrypoint.dart.lib.js:39:29)
      at main.next (&lt;anonymous&gt;)
   at http://localhost:49235/dart_sdk.js:39230:33
      at _RootZone.runUnary (http://localhost:49235/dart_sdk.js:39087:58)
      at _FutureListener.thenAwait.handleValue (http://localhost:49235/dart_sdk.js:34073:29)
      at handleValueCallback (http://localhost:49235/dart_sdk.js:34633:49)
      at Function._propagateToListeners (http://localhost:49235/dart_sdk.js:34671:17)
      at _Future.new.[_completeWithValue] (http://localhost:49235/dart_sdk.js:34513:23)
      at http://localhost:49235/dart_sdk.js:33724:46
      at _RootZone.runUnary (http://localhost:49235/dart_sdk.js:39087:58)
      at _FutureListener.then.handleValue (http://localhost:49235/dart_sdk.js:34073:29)
      at handleValueCallback (http://localhost:49235/dart_sdk.js:34633:49)
      at Function._propagateToListeners (http://localhost:49235/dart_sdk.js:34671:17)
      at _Future.new.[_completeWithValue] (http://localhost:49235/dart_sdk.js:34513:23)
      at async._AsyncCallbackEntry.new.callback (http://localhost:49235/dart_sdk.js:34536:35)
      at Object._microtaskLoop (http://localhost:49235/dart_sdk.js:39374:13)
      at _startMicrotaskLoop (http://localhost:49235/dart_sdk.js:39380:13)
      at http://localhost:49235/dart_sdk.js:34887:9
  </code></pre>
  <p>Thats the script I use in the index.html File</p>
  <pre><code> &lt;script type=&quot;module&quot;&gt;
          // Import the functions you need from the SDKs you need
          import { initializeApp } from &quot;https://www.gstatic.com/firebasejs/8.10.0/firebase-app.js&quot;;
  
          // Your web app's Firebase configuration
          const firebaseConfig = {
              apiKey: &quot;-----....-----&quot;,
              authDomain: &quot;-----....-----&quot;,
              projectId: &quot;-----....-----&quot;,
              storageBucket: &quot;-----....-----&quot;,
              messagingSenderId: &quot;-----....-----&quot;,
              appId: &quot;-----....-----&quot;
          };
  
          // Initialize Firebase
          const app = initializeApp(firebaseConfig);
      &lt;/script&gt;
  </code></pre>
  <p>I also init everything properly at the beginning of the app with:</p>
  <pre><code>void main() async {
    WidgetsFlutterBinding.ensureInitialized();
    await Firebase.initializeApp();
    runApp(MyApp());
  }
  </code></pre>
  <p>Does someone now how to fix this error?</p>