Flutter Web 应用程序在部署到 Firebase 托管后返回空白页面
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【中文标题】Flutter Web 应用程序在部署到 Firebase 托管后返回空白页面【英文标题】：Flutter web app is returning blank page after being deployed to firebase hosting 【发布时间】：2021-07-23 01:20:57 【问题描述】：我已成功将我的 Flutter Web 应用部署到 Firebase 托管。但是当我访问链接空白页时返回 这是我的 firebase.json
"database":
"rules": "database.rules.json"
,
"firestore":
"rules": "firestore.rules",
"indexes": "firestore.indexes.json"
,
"hosting":
"public": "build/web",
"ignore": [
"firebase.json",
"**/.*",
"**/node_modules/**"
]
,
"storage":
"rules": "storage.rules"
,
"emulators":
"auth":
"port": 9099
,
"functions":
"port": 5001
,
"firestore":
"port": 8080
,
"database":
"port": 9000
,
"hosting":
"port": 5000
,
"pubsub":
"port": 8085
,
"ui":
"enabled": true
,
"remoteconfig":
"template": "remoteconfig.template.json"
这是我的 index.html
<!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 soicial network.">
<!-- 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="lycread">
<link rel="apple-touch-icon" href="icons/Icon-192.png">
<!-- Favicon -->
<link rel="icon" type="image/png" href="favicon.png" />
<title>LycRead Web</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?v=2330050811');
);
</script>
<script src="main.dart.js" type="application/javascript"></script>
<!-- The core Firebase JS SDK is always required and must be listed first -->
<script src="https://www.gstatic.com/firebasejs/8.4.1/firebase-app.js"></script>
<!-- TODO: Add SDKs for Firebase products that you want to use
https://firebase.google.com/docs/web/setup#available-libraries -->
<script src="https://www.gstatic.com/firebasejs/8.4.1/firebase-analytics.js"></script>
<script src="https://www.gstatic.com/firebasejs/8.4.1/firebase-auth.js"></script>
<script src="https://www.gstatic.com/firebasejs/8.4.1/firebase-firestore.js"></script>
<script src="https://www.gstatic.com/firebasejs/8.4.1/firebase-messaging.js"></script>
<script src="https://www.gstatic.com/firebasejs/8.4.1/firebase-storage.js"></script>
<script>
// Your web app's Firebase configuration
// For Firebase JS SDK v7.20.0 and later, measurementId is optional
var firebaseConfig =
apiKey: "my config",
authDomain: "my config",
projectId: "my config",
storageBucket: "my config",
messagingSenderId: "my config",
appId: "my config",
measurementId: "my config"
;
// Initialize Firebase
firebase.initializeApp(firebaseConfig);
firebase.analytics();
</script>
</body>
</html>
此外，当我使用 Chrome 打开 index.html 时，它也会返回空白页。但是，当我使用控制台运行项目时，一切正常。
这是我部署后的终端输出
【问题讨论】：
【参考方案1】：我发现了问题 它在 index.html 中 这部分代码
<script>
if ('serviceWorker' in navigator)
window.addEventListener('flutter-first-frame', function ()
navigator.serviceWorker.register('flutter_service_worker.js?v=2330050811');
);
</script>
<script src="main.dart.js" type="application/javascript"></script>
应该在body标签的末尾
【讨论】：
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