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I have an error that has been appearing in my last few deploys and I am unable to trace it. It only happens when I deploy to firebase website, debug works without any issues.
Uncaught SyntaxError: Unexpected token '<' (at flutter.js:1:1)
(index):50 Uncaught ReferenceError: _flutter is not defined
at (index):50:7
This shows up in the browser console.
This is my 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>
663
Here's a solution that worked for me.
In index.html
Change this
<base href="/">
To this
<base href="./">
answered Sep 13 '25 13:09
You should try to rebuild your application with:
flutter clean
and then
flutter build web
I tried to delete build folder manually, but it didn't work. It's preferable to use flutter clean.
23
answered Sep 13 '25 13:09
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