Flutter Failed to register a ServiceWorker for scope with script, The script has an unsupported MIME type
Found solution: https://stackoverflow.com/a/63800226/3486691
I had to create the file and provide the default settings so the app can work without throwing errors.
ForestG
Hungarian Frontend developer, currently working in Angular on multiple projects. Has some experience with Datamining, backend Java, cross-platform and JS based full stack. While not debugging buttons, I love to jog, hike, and videogames (told you mom it would stick).
Updated on December 28, 2022Comments
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ForestG over 1 year
I have a fully functioning Flutter app with FlutterFire, where the android bundle works just fine, but the web client gives a strange error upon start. I cannot call any firebase function with flutterfire with it either. (simple firebase queries works just fine)
The error message upon startup or when I try to call
FirebaseFunctions.instance.httpsCallabe('...::1337/dart_sdk.js:7025 Uncaught (in promise) Error: [firebase_messaging/failed-service-worker-registration] Messaging: We are unable to register the default service worker. Failed to register a ServiceWorker for scope ('http://localhost:1337/firebase-cloud-messaging-push-scope') with script ('http://localhost:1337/firebase-messaging-sw.js'): The script has an unsupported MIME type ('text/html'). . at Object.throw_ [as throw] (:1337/dart_sdk.js:5334) at firebase_messaging_web.FirebaseMessagingWeb.new.getToken (:1337/packages/firebase_messaging_web/firebase_messaging_web.dart.lib.js:112) at getToken.throw (<anonymous>) at :1337/dart_sdk.js:39038 at _RootZone.runBinary (:1337/dart_sdk.js:38894) at _FutureListener.thenAwait.handleError (:1337/dart_sdk.js:33887) at handleError (:1337/dart_sdk.js:34451) at Function._propagateToListeners (:1337/dart_sdk.js:34477) at _Future.new.[_completeError] (:1337/dart_sdk.js:34323) at async._AsyncCallbackEntry.new.callback (:1337/dart_sdk.js:34362) at Object._microtaskLoop (:1337/dart_sdk.js:39176) at _startMicrotaskLoop (:1337/dart_sdk.js:39182) at :1337/dart_sdk.js:34689I don't have a firebase-messaging-sw.js file. I only did what the documentation recommended https://firebase.flutter.dev/docs/messaging/overview/#5-web-only-add-the-sdk.
My index.html:
<!DOCTYPE html> <html> <head> ... <!-- The core Firebase JS SDK is always required and must be listed first --> <script src="https://www.gstatic.com/firebasejs/7.20.0/firebase-app.js"></script> <script src="https://www.gstatic.com/firebasejs/7.20.0/firebase-auth.js"></script> <script src="https://www.gstatic.com/firebasejs/7.20.0/firebase-firestore.js"></script> <script src="https://www.gstatic.com/firebasejs/7.20.0/firebase-messaging.js"></script> <script src="https://www.gstatic.com/firebasejs/7.20.0/firebase-functions.js"></script> <script> // Your web app's Firebase configuration var firebaseConfig = { apiKey: "****", authDomain: "*****", databaseURL: "*****", projectId: "*****", storageBucket: "*****", messagingSenderId: "*****", appId: "*****" }; // Initialize Firebase firebase.initializeApp(firebaseConfig); </script> </head> <body> <script > if ('serviceWorker' in navigator) { window.addEventListener('flutter-first-frame', function () { navigator.serviceWorker.register('flutter_service_worker.js'); }); } </script> <script src="main.dart.js" type="application/javascript"></script> </body> </html>Flutter doctor:
$ flutter doctor Doctor summary (to see all details, run flutter doctor -v): [✓] Flutter (Channel stable, 2.0.3, on Linux, locale en_US.UTF-8)