获取_flutter在颤振网络中是未定义的，仅在生产中。
获取_flutter在颤振网络中是未定义的，仅在生产中。
提问于 2022-07-01 19:12:10
我在上几次部署中出现了一个错误，我无法跟踪它。只有当我部署到firebase网站时，调试工作才会发生，没有任何问题。
Uncaught SyntaxError: Unexpected token '<' (at flutter.js:1:1)
(index):50 Uncaught ReferenceError: _flutter is not defined
at (index):50:7这将显示在浏览器控制台中。
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.
For more details:
* https://developer.mozilla.org/en-US/docs/Web/HTML/Element/base
This is a placeholder for base href that will be replaced by the value of
the `--base-href` argument provided to `flutter build`.
-->
<base href="$FLUTTER_BASE_HREF">
<meta charset="UTF-8">
<meta content="IE=Edge" http-equiv="X-UA-Compatible">
<meta name="description" content="Trading made easy">
<meta name="google-signin-client_id"
content="xxx.apps.googleusercontent.com">
<!-- 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="tornmarket">
<link rel="apple-touch-icon" href="icons/Icon-192.png">
<!-- Favicon -->
<link rel="icon" type="image/png" href="favicon.png" />
<title>Torn Market</title>
<link rel="manifest" href="manifest.json">
<!-- <script>self.FIREBASE_APPCHECK_DEBUG_TOKEN = true;</script> -->
<script>
// The value below is injected by flutter build, do not touch.
var serviceWorkerVersion = null;
</script>
<!-- This script adds the flutter initialization JS code -->
<script src="flutter.js" defer></script>
</head>
<body>
<script>
window.addEventListener('load', function (ev) {
// Download main.dart.js
_flutter.loader.loadEntrypoint({
serviceWorker: {
serviceWorkerVersion: serviceWorkerVersion,
}
}).then(function (engineInitializer) {
return engineInitializer.initializeEngine();
}).then(function (appRunner) {
return appRunner.runApp();
});
});
</script>
</body>
</html>回答 4
Stack Overflow用户
发布于 2022-10-31 16:48:13
您应该尝试使用以下方法重新构建应用程序：
flutter clean然后
flutter build web我尝试手动删除build文件夹，但它没有工作。最好使用flutter clean。
Stack Overflow用户
发布于 2022-10-01 20:08:30
您很可能丢失了build/web文件夹中的flutter.js文件
Stack Overflow用户
发布于 2022-10-12 16:14:04
不知道下面的代码是否有效。尝试实现相同的方法，然后还原回。请将您的身体标签更改如下
<body>
<script src="main.dart.js" type="application/javascript"></script>
<script>
if ('serviceWorker' in navigator) {
window.addEventListener('flutter-first-frame', function () {
navigator.serviceWorker.register('flutter_service_worker.js');
navigator.serviceWorker.register('flutter_service_worker.js');
});
}
window.addEventListener('load', function(ev) {
// Download main.dart.js
_flutter.loader.loadEntrypoint({
serviceWorker: {
serviceWorkerVersion: serviceWorkerVersion,
}
}).then(function(engineInitializer) {
return engineInitializer.initializeEngine();
}).then(function(appRunner) {
return appRunner.runApp();
});
});
</script>
</body>页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/72833719
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