将 firebase 添加到 flutter web 时出现问题，TypeError:无法读取未定义的属性（读取“app”）
我正尝试将 Firebase 添加到将用于 Android 和 Web 的 Flutter 项目中，与 Android 的集成成功，但我无法完成 Web 安装，我已经阅读并尝试了 stackoverflow 和其他地方与此类似问题的所有答案，但对我没有任何作用，不知道我错过了什么。
我的 pubspec.yaml 中添加的软件包
dependencies:
...
firebase_core: ^1.6.0
firebase_storage: ^10.0.3
cloud_firestore: ^2.5.1
Firebase 应用在
main.dart
index.html
文件中的初始化
当我开始调试时，我在
web_entrypoint.dart
文件中收到此异常
main() async {
WidgetsFlutterBinding.ensureInitialized();
Firebase.initializeApp();
runApp(MyApp());
}
<body>
<script src="https://www.gstatic.com/firebasejs/9.0.1/firebase-app.js"></script>
<script src="https://www.gstatic.com/firebasejs/9.0.1/firebase-storage.js"></script>
<script src="https://www.gstatic.com/firebasejs/9.0.1/firebase-firestore.js"></script>
<script type="module">
import { getAnalytics } from "https://www.gstatic.com/firebasejs/9.0.1/firebase-analytics.js";
// 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
// For Firebase JS SDK v7.20.0 and later, measurementId is optional
const firebaseConfig = {
apiKey: "XXXXXXXXXXXXXXXXX",
authDomain: "XXXXXXXXXXXXX",
projectId: "XXXXXXXXXXXX",
storageBucket: "XXXXXXXXXXXX",
messagingSenderId: "XXXXXXXXXX",
appId: "XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX",
measurementId: "XXXXXXXX"
};
// Initialize Firebase
firebase.initializeApp(firebaseConfig);
const analytics = getAnalytics(app);
</script>
<!-- This script installs service_worker.js to provide PWA functionality to
application. For more information, see:
https://developers.google.com/web/fundamentals/primers/service-workers -->
<script>
var serviceWorkerVersion = null;
var scriptLoaded = false;
function loadMainDartJs() {
if (scriptLoaded) {
return;
}
scriptLoaded = true;
var scriptTag = document.createElement('script');
scriptTag.src = 'main.dart.js';
scriptTag.type = 'application/javascript';
document.body.append(scriptTag);
}
if ('serviceWorker' in navigator) {
// Service workers are supported. Use them.
window.addEventListener('load', function () {
// Wait for registration to finish before dropping the <script> tag.
// Otherwise, the browser will load the script multiple times,
// potentially different versions.
var serviceWorkerUrl = 'flutter_service_worker.js?v=' + serviceWorkerVersion;
navigator.serviceWorker.register(serviceWorkerUrl)
.then((reg) => {
function waitForActivation(serviceWorker) {
serviceWorker.addEventListener('statechange', () => {
if (serviceWorker.state == 'activated') {
console.log('Installed new service worker.');
loadMainDartJs();
}
});
}
if (!reg.active && (reg.installing || reg.waiting)) {
// No active web worker and we have installed or are installing
// one for the first time. Simply wait for it to activate.
waitForActivation(reg.installing ?? reg.waiting);
} else if (!reg.active.scriptURL.endsWith(serviceWorkerVersion)) {
// When the app updates the serviceWorkerVersion changes, so we
// need to ask the service worker to update.
console.log('New service worker available.');
reg.update();
waitForActivation(reg.installing);
} else {
// Existing service worker is still good.
console.log('Loading app from service worker.');
loadMainDartJs();
}
});
// If service worker doesn't succeed in a reasonable amount of time,
// fallback to plaint <script> tag.
setTimeout(() => {
if (!scriptLoaded) {
console.warn(
'Failed to load app from service worker. Falling back to plain <script> tag.',
);
loadMainDartJs();
}
}, 4000);
});
} else {
// Service workers not supported. Just drop the <script> tag.
loadMainDartJs();
}
</script>
</body>
TypeError: Cannot read properties of undefined (reading 'app')
at Object.app$ [as app] (http://localhost:59554/packages/firebase_core_web/src/interop/core.dart.lib.js:31:101)
at new cloud_firestore_web.FirebaseFirestoreWeb.new (http://localhost:59554/packages/cloud_firestore_web/src/write_batch_web.dart.lib.js:819:64)
at Function.registerWith (http://localhost:59554/packages/cloud_firestore_web/src/write_batch_web.dart.lib.js:731:73)
at Object.registerPlugins (http://localhost:59554/packages/PROJECT_NAME/generated_plugin_registrant.dart.lib.js:20:46)
at main (http://localhost:59554/web_entrypoint.dart.lib.js:31:35)
at main.next (<anonymous>)
at runBody (http://localhost:59554/dart_sdk.js:37422:34)
at Object._async [as async] (http://localhost:59554/dart_sdk.js:37453:7)
at main$ (http://localhost:59554/web_entrypoint.dart.lib.js:30:18)
at http://localhost:59554/main_module.bootstrap.js:19:10
at Array.forEach (<anonymous>)
at window.$dartRunMain (http://localhost:59554/main_module.bootstrap.js:18:32)
at <anonymous>:1:8
at Object.runMain (http://localhost:59554/dwds/src/injected/client.js:8825:21)
at http://localhost:59554/dwds/src/injected/client.js:22713:19
at _wrapJsFunctionForAsync_closure.$protected (http://localhost:59554/dwds/src/injected/client.js:3851:15)
at _wrapJsFunctionForAsync_closure.call$2 (http://localhost:59554/dwds/src/injected/client.js:11063:12)
在 index.html 中使用版本 8.6.1 而不是这个：
https://www.gstatic.com/firebasejs/9.0.1/firebase-storage.js
对所有 9.0.1 库使用此版本