[英]Cannot read properties of undefined (reading 'app')
Im trying to implement the firebase SDK to my Flutter web project.我正在尝试将 firebase SDK 实施到我的 Flutter Web 项目中。
But as i try to start to application the following error appear:但是当我尝试开始应用时,出现以下错误:
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 (<anonymous>)
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 (<anonymous>)
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$.next (<anonymous>)
at runBody (http://localhost:49235/dart_sdk.js:39250:34)
at Object._async [as async] (http://localhost:49235/dart_sdk.js:39281:7)
at main$ (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 (<anonymous>)
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
Thats the script I use in the index.html File这就是我在 index.html 文件中使用的脚本
<script type="module">
// Import the functions you need from the SDKs you need
import { initializeApp } from "https://www.gstatic.com/firebasejs/8.10.0/firebase-app.js";
// Your web app's Firebase configuration
const firebaseConfig = {
apiKey: "-----....-----",
authDomain: "-----....-----",
projectId: "-----....-----",
storageBucket: "-----....-----",
messagingSenderId: "-----....-----",
appId: "-----....-----"
};
// Initialize Firebase
const app = initializeApp(firebaseConfig);
</script>
I also init everything properly at the beginning of the app with:我还在应用程序开始时使用以下命令正确初始化所有内容:
void main() async {
WidgetsFlutterBinding.ensureInitialized();
await Firebase.initializeApp();
runApp(MyApp());
}
Does someone now how to fix this error?现在有人如何解决这个错误?
我在 Firebase 9 中遇到了类似的问题。降级到 8.x,看看它是否已解决。
I was having this issue and solved this changing the script in the index.html to this我遇到了这个问题并解决了这个问题,将 index.html 中的脚本更改为此
<script src="https://www.gstatic.com/firebasejs/8.10.0/firebase-app.js"></script>
<script src="https://www.gstatic.com/firebasejs/8.10.0/firebase-auth.js"></script>
<script src="https://www.gstatic.com/firebasejs/8.10.0/firebase-firestore.js"></script>
<script src="https://www.gstatic.com/firebasejs/8.10.0/firebase-storage.js"></script>
<script>
// Import the functions you need from the SDKs you need
// TODO: Add SDKs for Firebase products that you want to use
// https://firebase.google.com/docs/web/setup#available-libraries
// Your web app's Firebase configuration
const firebaseConfig = {
apiKey: "...",
authDomain: "...",
projectId: "...",
storageBucket: "...",
messagingSenderId: "...",
appId: "..."
};
// Initialize Firebase
firebase.initializeApp(firebaseConfig);
</script>
in current version only add this imports在当前版本中仅添加此导入
import firebase from "firebase/compat/app"; import "firebase/compat/auth"; import "firebase/compat/firestore";
in the head the firebase settings file在头部 Firebase 设置文件
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.