It has been 3 weeks since I have been trying to set up firebase with a flutter web app. I have been following tutorials all over the internet but none of them have been able to help me. Every time I get the same errors.
This is my main.dart
import 'package:flutter/material.dart';
import 'package:firebase_core/firebase_core.dart';
void main() async {
WidgetsFlutterBinding.ensureInitialized();
await Firebase.initializeApp();
runApp(const MyApp());
}
class MyApp extends StatelessWidget {
const MyApp({Key? key}) : super(key: key);
@override
Widget build(BuildContext context) {
return MaterialApp(
title: 'Flutter Demo',
theme: ThemeData(
primarySwatch: Colors.blue,
),
home: const MyHomePage(title: 'Flutter Demo Home Page'),
);
}
}
class MyHomePage extends StatefulWidget {
const MyHomePage({Key? key, required this.title}) : super(key: key);
final String title;
@override
State<MyHomePage> createState() => _MyHomePageState();
}
class _MyHomePageState extends State<MyHomePage> {
int _counter = 0;
void _incrementCounter() {
setState(() {
_counter ;
});
}
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text(widget.title),
),
body: Center(
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
children: <Widget>[
const Text(
'You have pushed the button this many times:',
),
Text(
'$_counter',
style: Theme.of(context).textTheme.headline4,
),
],
),
),
floatingActionButton: FloatingActionButton(
onPressed: _incrementCounter,
tooltip: 'Increment',
child: const Icon(Icons.add),
), // This trailing comma makes auto-formatting nicer for build methods.
);
}
}
This is my index.html
<!DOCTYPE html>
<html>
<head>
<!--
If you are serving your web app in a path other than the root, change the
href value below to reflect the base path you are serving from.
The path provided below has to start and end with a slash "/" in order for
it to work correctly.
For more details:
* https://developer.mozilla.org/en-US/docs/Web/HTML/Element/base
This is a placeholder for base href that will be replaced by the value of
the `--base-href` argument provided to `flutter build`.
-->
<base href="$FLUTTER_BASE_HREF">
<meta charset="UTF-8">
<meta content="IE=Edge" http-equiv="X-UA-Compatible">
<meta name="description" content="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="quiz_app_4">
<link rel="apple-touch-icon" href="icons/Icon-192.png">
<!-- Favicon -->
<link rel="icon" type="image/png" href="favicon.png"/>
<title>quiz_app_4</title>
<link rel="manifest" href="manifest.json">
</head>
<body>
<script type="module">
// Import the functions you need from the SDKs you need
import { initializeApp } from "https://www.gstatic.com/firebasejs/9.6.8/firebase-app.js";
import { getAnalytics } from "https://www.gstatic.com/firebasejs/9.6.8/firebase-analytics.js";
// TODO: Add SDKs for Firebase products that you want to use
// https://firebase.google.com/docs/web/setup#available-libraries
import { } from 'firebase/auth';
import { } from 'firebase/database';
// Your web app's Firebase configuration
// For Firebase JS SDK v7.20.0 and later, measurementId is optional
const firebaseConfig = {
apiKey: "...",
authDomain: "...",
projectId: "...",
storageBucket: "...",
messagingSenderId: "...",
appId: "...",
measurementId: "..."
};
// Initialize Firebase
const app = initializeApp(firebaseConfig);
</script>
<!-- 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>
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) {
window.addEventListener('load', function () {
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();
}
});
setTimeout(() => {
if (!scriptLoaded) {
console.warn(
'Failed to load app from service worker. Falling back to plain <script> tag.',
);
loadMainDartJs();
}
}, 4000);
});
} else {
loadMainDartJs();
}
</script>
</body>
</html>
These are my pubspec.yaml dependencies.
...
dependencies:
flutter:
sdk: flutter
cupertino_icons: ^1.0.2
firebase_core: ^1.13.1
firebase_database: ^9.0.8
firebase_auth: ^3.3.9
# firebase_core_web: ^1.6.1
dev_dependencies:
flutter_test:
sdk: flutter
flutter_lints: ^1.0.0
...
These are the errors I get.
Launching lib\main.dart on Chrome in debug mode...
Error: Couldn't resolve the package 'http' in 'package:http/http.dart'.
../../flutter/.pub-cache/hosted/pub.dartlang.org/firebase_core_web-1.6.1/lib/firebase_core_web.dart:10:8: Error: Not found:
'package:http/http.dart'
import 'package:http/http.dart' as http;
^
../../flutter/packages/flutter_web_plugins/lib/src/navigation/js_url_strategy.dart:48:14: Error: Method not found: 'allowInterop'.
getPath: allowInterop(strategy.getPath),
^^^^^^^^^^^^
../../flutter/packages/flutter_web_plugins/lib/src/navigation/js_url_strategy.dart:49:15: Error: Method not found: 'allowInterop'.
getState: allowInterop(strategy.getState),
^^^^^^^^^^^^
../../flutter/packages/flutter_web_plugins/lib/src/navigation/js_url_strategy.dart:50:26: Error: Method not found: 'allowInterop'.
addPopStateListener: allowInterop(strategy.addPopStateListener),
^^^^^^^^^^^^
../../flutter/packages/flutter_web_plugins/lib/src/navigation/js_url_strategy.dart:51:25: Error: Method not found: 'allowInterop'.
prepareExternalUrl: allowInterop(strategy.prepareExternalUrl),
^^^^^^^^^^^^
../../flutter/packages/flutter_web_plugins/lib/src/navigation/js_url_strategy.dart:52:16: Error: Method not found: 'allowInterop'.
pushState: allowInterop(strategy.pushState),
^^^^^^^^^^^^
../../flutter/packages/flutter_web_plugins/lib/src/navigation/js_url_strategy.dart:53:19: Error: Method not found: 'allowInterop'.
replaceState: allowInterop(strategy.replaceState),
^^^^^^^^^^^^
../../flutter/packages/flutter_web_plugins/lib/src/navigation/js_url_strategy.dart:54:9: Error: Method not found: 'allowInterop'.
go: allowInterop(strategy.go),
^^^^^^^^^^^^
../../flutter/.pub-cache/hosted/pub.dartlang.org/firebase_core_web-1.6.1/lib/firebase_core_web.dart:48:15: Error: Method not found: 'getProperty'. if (js_util.getProperty(e, 'name') == 'FirebaseError') {
^^^^^^^^^^^
../../flutter/.pub-cache/hosted/pub.dartlang.org/firebase_core_web-1.6.1/lib/firebase_core_web.dart:49:20: Error: Method not found: 'getProperty'. return js_util.getProperty(e, 'code') ?? '';
^^^^^^^^^^^
../../flutter/.pub-cache/hosted/pub.dartlang.org/firebase_core_web-1.6.1/lib/firebase_core_web.dart:61:15: Error: Method not found: 'getProperty'. if (js_util.getProperty(e, 'name') == 'FirebaseError') {
^^^^^^^^^^^
../../flutter/.pub-cache/hosted/pub.dartlang.org/firebase_core_web-1.6.1/lib/firebase_core_web.dart:62:30: Error: Method not found: 'getProperty'. String rawCode = js_util.getProperty(e, 'code');
^^^^^^^^^^^
../../flutter/.pub-cache/hosted/pub.dartlang.org/firebase_core_web-1.6.1/lib/firebase_core_web.dart:64:30: Error: Method not found: 'getProperty'. String message = js_util.getProperty(e, 'message') ?? '';
^^^^^^^^^^^
../../flutter/.pub-cache/hosted/pub.dartlang.org/firebase_core_web-1.6.1/lib/src/firebase_core_web.dart:36:12: Error: The getter 'context' isn't
defined for the class 'FirebaseCoreWeb'.
- 'FirebaseCoreWeb' is from 'package:firebase_core_web/firebase_core_web.dart'
('../../flutter/.pub-cache/hosted/pub.dartlang.org/firebase_core_web-1.6.1/lib/firebase_core_web.dart').
Try correcting the name to the name of an existing getter, or defining a getter or field named 'context'.
return context['require'] != null;
^^^^^^^
../../flutter/.pub-cache/hosted/pub.dartlang.org/firebase_core_web-1.6.1/lib/src/firebase_core_web.dart:45:12: Error: The getter 'context' isn't
defined for the class 'FirebaseCoreWeb'.
- 'FirebaseCoreWeb' is from 'package:firebase_core_web/firebase_core_web.dart'
('../../flutter/.pub-cache/hosted/pub.dartlang.org/firebase_core_web-1.6.1/lib/firebase_core_web.dart').
Try correcting the name to the name of an existing getter, or defining a getter or field named 'context'.
return context['flutterfire_web_sdk_version'] ??
^^^^^^^
../../flutter/.pub-cache/hosted/pub.dartlang.org/firebase_core_web-1.6.1/lib/src/firebase_core_web.dart:61:7: Error: 'JsObject' isn't a type.
JsObject ignored =
^^^^^^^^
../../flutter/.pub-cache/hosted/pub.dartlang.org/firebase_core_web-1.6.1/lib/src/firebase_core_web.dart:62:11: Error: The getter 'JsObject' isn't
defined for the class 'FirebaseCoreWeb'.
- 'FirebaseCoreWeb' is from 'package:firebase_core_web/firebase_core_web.dart'
('../../flutter/.pub-cache/hosted/pub.dartlang.org/firebase_core_web-1.6.1/lib/firebase_core_web.dart').
Try correcting the name to the name of an existing getter, or defining a getter or field named 'JsObject'.
JsObject.fromBrowserObject(context['flutterfire_ignore_scripts']);
^^^^^^^^
../../flutter/.pub-cache/hosted/pub.dartlang.org/firebase_core_web-1.6.1/lib/src/firebase_core_web.dart:62:38: Error: The getter 'context' isn't
defined for the class 'FirebaseCoreWeb'.
- 'FirebaseCoreWeb' is from 'package:firebase_core_web/firebase_core_web.dart'
('../../flutter/.pub-cache/hosted/pub.dartlang.org/firebase_core_web-1.6.1/lib/firebase_core_web.dart').
Try correcting the name to the name of an existing getter, or defining a getter or field named 'context'.
JsObject.fromBrowserObject(context['flutterfire_ignore_scripts']);
^^^^^^^
../../flutter/.pub-cache/hosted/pub.dartlang.org/firebase_core_web-1.6.1/lib/src/firebase_core_web.dart:79:5: Error: 'ScriptElement' isn't a type. ScriptElement script = ScriptElement();
^^^^^^^^^^^^^
../../flutter/.pub-cache/hosted/pub.dartlang.org/firebase_core_web-1.6.1/lib/src/firebase_core_web.dart:79:28: Error: The method 'ScriptElement'
isn't defined for the class 'FirebaseCoreWeb'.
- 'FirebaseCoreWeb' is from 'package:firebase_core_web/firebase_core_web.dart'
('../../flutter/.pub-cache/hosted/pub.dartlang.org/firebase_core_web-1.6.1/lib/firebase_core_web.dart').
Try correcting the name to the name of an existing method, or defining a method named 'ScriptElement'.
ScriptElement script = ScriptElement();
^^^^^^^^^^^^^
../../flutter/.pub-cache/hosted/pub.dartlang.org/firebase_core_web-1.6.1/lib/src/firebase_core_web.dart:83:12: Error: The getter 'document' isn't
defined for the class 'FirebaseCoreWeb'.
- 'FirebaseCoreWeb' is from 'package:firebase_core_web/firebase_core_web.dart'
('../../flutter/.pub-cache/hosted/pub.dartlang.org/firebase_core_web-1.6.1/lib/firebase_core_web.dart').
Try correcting the name to the name of an existing getter, or defining a getter or field named 'document'.
assert(document.head != null);
^^^^^^^^
../../flutter/.pub-cache/hosted/pub.dartlang.org/firebase_core_web-1.6.1/lib/src/firebase_core_web.dart:84:5: Error: The getter 'document' isn't
defined for the class 'FirebaseCoreWeb'.
- 'FirebaseCoreWeb' is from 'package:firebase_core_web/firebase_core_web.dart'
('../../flutter/.pub-cache/hosted/pub.dartlang.org/firebase_core_web-1.6.1/lib/firebase_core_web.dart').
Try correcting the name to the name of an existing getter, or defining a getter or field named 'document'.
document.head!.append(script);
^^^^^^^^
../../flutter/.pub-cache/hosted/pub.dartlang.org/firebase_core_web-1.6.1/lib/src/firebase_core_web.dart:93:9: Error: The getter 'context' isn't
defined for the class 'FirebaseCoreWeb'.
- 'FirebaseCoreWeb' is from 'package:firebase_core_web/firebase_core_web.dart'
('../../flutter/.pub-cache/hosted/pub.dartlang.org/firebase_core_web-1.6.1/lib/firebase_core_web.dart').
Try correcting the name to the name of an existing getter, or defining a getter or field named 'context'.
if (context['firebase'] != null) {
^^^^^^^
../../flutter/.pub-cache/hosted/pub.dartlang.org/firebase_core_web-1.6.1/lib/src/firebase_core_web.dart:134:5: Error: 'JsObject' isn't a type.
JsObject require = JsObject.fromBrowserObject(context['require']);
^^^^^^^^
../../flutter/.pub-cache/hosted/pub.dartlang.org/firebase_core_web-1.6.1/lib/src/firebase_core_web.dart:126:9: Error: The getter 'context' isn't
defined for the class 'FirebaseCoreWeb'.
- 'FirebaseCoreWeb' is from 'package:firebase_core_web/firebase_core_web.dart'
('../../flutter/.pub-cache/hosted/pub.dartlang.org/firebase_core_web-1.6.1/lib/firebase_core_web.dart').
Try correcting the name to the name of an existing getter, or defining a getter or field named 'context'.
if (context['firebase'] != null) {
^^^^^^^
../../flutter/.pub-cache/hosted/pub.dartlang.org/firebase_core_web-1.6.1/lib/src/firebase_core_web.dart:134:24: Error: The getter 'JsObject' isn'tdefined for the class 'FirebaseCoreWeb'.
- 'FirebaseCoreWeb' is from 'package:firebase_core_web/firebase_core_web.dart'
('../../flutter/.pub-cache/hosted/pub.dartlang.org/firebase_core_web-1.6.1/lib/firebase_core_web.dart').
Try correcting the name to the name of an existing getter, or defining a getter or field named 'JsObject'.
JsObject require = JsObject.fromBrowserObject(context['require']);
^^^^^^^^
../../flutter/.pub-cache/hosted/pub.dartlang.org/firebase_core_web-1.6.1/lib/src/firebase_core_web.dart:134:51: Error: The getter 'context' isn't
defined for the class 'FirebaseCoreWeb'.
- 'FirebaseCoreWeb' is from 'package:firebase_core_web/firebase_core_web.dart'
('../../flutter/.pub-cache/hosted/pub.dartlang.org/firebase_core_web-1.6.1/lib/firebase_core_web.dart').
Try correcting the name to the name of an existing getter, or defining a getter or field named 'context'.
JsObject require = JsObject.fromBrowserObject(context['require']);
^^^^^^^
../../flutter/.pub-cache/hosted/pub.dartlang.org/firebase_core_web-1.6.1/lib/src/firebase_core_web.dart:136:7: Error: The getter 'JsObject' isn't
defined for the class 'FirebaseCoreWeb'.
- 'FirebaseCoreWeb' is from 'package:firebase_core_web/firebase_core_web.dart'
('../../flutter/.pub-cache/hosted/pub.dartlang.org/firebase_core_web-1.6.1/lib/firebase_core_web.dart').
...
(package:frontend_server/src/javascript_bundle.dart:164:65)
<asynchronous suspension>
#2 FrontendCompiler.writeJavascriptBundle (package:frontend_server/frontend_server.dart:665:32)
<asynchronous suspension>
#3 FrontendCompiler.compile (package:frontend_server/frontend_server.dart:573:9)
<asynchronous suspension>
#4 listenAndCompile.<anonymous closure> (package:frontend_server/frontend_server.dart:1154:11)
<asynchronous suspension>
the Dart compiler exited unexpectedly.
Waiting for connection from debug service on Chrome... 26.1s
Failed to compile application.
Adding http to my dependencies eliminates
Error: Couldn't resolve the package 'http' in 'package:http/http.dart'.
I need only the firebase authentication and firebase realtime database for my project.
I am new to flutter and have already built my app and it works fine on android but I need it as a web app to host it on a server.
It would really make my life alot easier if anyone helped me. Thank you.
CodePudding user response：
Did you do a flutter clean? your code looks pretty straightforward. The only thing I spotted was that in your Firebase.initializeApp you are not providing the options properties you get from Firebase:
void main() async {
WidgetsFlutterBinding.ensureInitialized();
await Firebase.initializeApp(
// pass the options from the Firebase SDK configuration
options: const FirebaseOptions(
apiKey: "XXX",
authDomain: "XXX",
databaseURL: "XXX",
projectId: "XXX",
storageBucket: "XXX",
messagingSenderId: "XXX",
appId: "XXX"
));
runApp(const MyApp());
}
CodePudding user response：
Reinstalling flutter fixed my issue.