FirebaseError：Firebase：未创建 Firebase 应用“[DEFAULT]” - 调用 Firebase App.initializeApp() (app/no-app)。 颤动
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【中文标题】FirebaseError：Firebase：未创建 Firebase 应用“[DEFAULT]” - 调用 Firebase App.initializeApp() (app/no-app)。 颤动网络【英文标题】：FirebaseError: Firebase: No Firebase App '[DEFAULT]' has been created - call Firebase App.initializeApp() (app/no-app). Flutter webFirebaseError：Firebase：未创建 Firebase 应用“[DEFAULT]” - 调用 Firebase App.initializeApp() (app/no-app)。 颤动网络 【发布时间】：2021-12-15 12:43:22 【问题描述】：the problem**
FirebaseError：Firebase：没有创建 Firebase 应用“[DEFAULT]”
调用 Firebase App.initializeApp() (app/no-app)。**
7 多天以来，我一直在尝试解决我的“flutter admin web app”问题。但我做不到。
√ 我的 Firebase 身份验证是：匿名 √ Flutter（频道测试版，2.7.0-3.1.pre √ Dart 2.15 版本 √ android 工具链 - 为 Android 设备开发（Android SDK 版本 31.0.0) √ Chrome - 为网络开发 √ Android Studio（2020.3版）
我该如何解决这个问题？
请帮帮我。谁知道呢，亲爱的导师。
index.html（文件）
<!DOCTYPE html>
<html>
<head>
<!--
If you are serving your web app in a path other than the root, change the
href value below to reflect the base path you are serving from.
The path provided below has to start and end with a slash "/" in order for
it to work correctly.
For more details:
* https://developer.mozilla.org/en-US/docs/Web/HTML/Element/base
-->
<base href="/">
<meta charset="UTF-8">
<meta content="IE=Edge" http-equiv="X-UA-Compatible">
<meta name="description" content="A new Flutter project.">
<!-- ios meta tags & icons -->
<meta name="apple-mobile-web-app-capable" content="yes">
<meta name="apple-mobile-web-app-status-bar-style" content="black">
<meta name="apple-mobile-web-app-title" content="grocery_admin_app_flutter">
<link rel="apple-touch-icon" href="icons/Icon-192.png">
<title>grocery_admin_app_flutter</title>
<link rel="manifest" href="manifest.json">
</head>
<body>
<!-- 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 -->
<!-- The core Firebase JS SDK is always required and must be listed first -->
<script src="https://www.gstatic.com/firebasejs/8.6.1/firebase-app.js"></script>
<script src="https://www.gstatic.com/firebasejs/8.6.1/firebase-analytics.js"></script>
<script src="https://www.gstatic.com/firebasejs/8.6.1/firebase-firestore.js"></script>
<script src="https://www.gstatic.com/firebasejs/8.6.1/firebase-auth.js"></script>
<script src="https://www.gstatic.com/firebasejs/8.6.1/firebase-storage.js"></script>
<script type="text/javascript">
let useHtml = // ...
if(useHtml)
window.flutterWebRenderer = "html";
else
window.flutterWebRenderer = "canvaskit";
</script>
<script src="main.dart.js" type="application/javascript"></script>
<script>
// Your web app's Firebase configuration
// For Firebase JS SDK v7.20.0 and later, measurementId is optional
const firebaseConfig =
apiKey: "AIzaSyAgoXpOjiZntQBEMqt7ZDrcFpLRmH1ZwCM",
authDomain: "jaituncshop.firebaseapp.com",
databaseURL: "https://jaituncshop-default-rtdb.firebaseio.com",
projectId: "jaituncshop",
storageBucket: "jaituncshop.appspot.com",
messagingSenderId: "338592147861",
appId: "1:338592147861:web:14315ce1d827ad50c1ee9c",
measurementId: "G-TG69GZ1VSX"
;
// Initialize Firebase
const app = initializeApp(firebaseConfig);
const analytics = getAnalytics(app);
</script>
<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>
</html>
【问题讨论】：
【参考方案1】：我昨天遇到了同样的问题，大多数解决方案都没有解决问题。我终于解决了它，并将发布我的整个 index.html 以便您可以使用它。如果可能，请逐字使用它，当它起作用时，您就可以开始编辑了。
<!DOCTYPE html>
<html>
<head>
<!--
If you are serving your web app in a path other than the root, change the
href value below to reflect the base path you are serving from.
The path provided below has to start and end with a slash "/" in order for
it to work correctly.
Fore more details:
* https://developer.mozilla.org/en-US/docs/Web/HTML/Element/base
-->
<base href="/">
<meta charset="UTF-8">
<meta content="IE=Edge" http-equiv="X-UA-Compatible">
<meta name="description" content="A new Flutter project.">
<!-- iOS meta tags & icons -->
<meta name="apple-mobile-web-app-capable" content="yes">
<meta name="apple-mobile-web-app-status-bar-style" content="black">
<meta name="apple-mobile-web-app-title" content="fiber">
<link rel="apple-touch-icon" href="icons/Icon-192.png">
<!-- Favicon -->
<link rel="icon" type="image/png" href="favicon.png" />
<title>Your title</title>
<link rel="manifest" href="manifest.json">
</head>
<body>
<!-- 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>
if ('serviceWorker' in navigator)
window.addEventListener('flutter-first-frame', function ()
navigator.serviceWorker.register('flutter_service_worker.js');
);
</script>
<script src="https://www.gstatic.com/firebasejs/8.6.1/firebase-app.js"></script>
<script src="https://www.gstatic.com/firebasejs/8.6.1/firebase-firestore.js"></script>
<script src="https://www.gstatic.com/firebasejs/8.6.1/firebase-analytics.js"></script>
<script src="https://www.gstatic.com/firebasejs/8.6.1/firebase-auth.js"></script>
<script src="https://www.gstatic.com/firebasejs/8.6.1/firebase-functions.js"></script>
<script src="https://www.gstatic.com/firebasejs/8.6.1/firebase-messaging.js"></script>
<script src="https://www.gstatic.com/firebasejs/8.6.1/firebase-storage.js"></script>
<script>
const firebaseConfig =
apiKey: "...",
authDomain: "...",
databaseURL: "...,
projectId: "...",
storageBucket: "...",
messagingSenderId: "...",
appId: "...",
measurementId: "..."
;
firebase.initializeApp(firebaseConfig);
</script>
<script src="main.dart.js" type="application/javascript"></script>
</body>
</html>
但只要看看你的代码，我可以告诉你这一行 <script src="main.dart.js" type="application/javascript"></script> 必须排在最后，因为它使用了 'app'
【讨论】：
W0W。谢谢，亲爱的，它正在工作，但 firebase 身份验证不起作用，没有记录。 对我来说，身份验证有效。 auth 给你什么错误信息？ 没有错误，但没有记录。 （用户名无效）。我将与您的导师分享我的代码或回购。 github repo link 用户名无效。你能确认用户名在android上登录吗？这应该是您的代码的问题，而不是 Firebase Auth。以上是关于FirebaseError：Firebase：未创建 Firebase 应用“[DEFAULT]” - 调用 Firebase App.initializeApp() (app/no-app)。 颤动的主要内容，如果未能解决你的问题，请参考以下文章
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