Console prints dart:ui_web warnings in a new Flutter project #133069
Description
Running a brand new Flutter web app shows these warnings:
The webOnlyWarmupEngine API is deprecated and will be removed in a future release. Please use `bootstrapEngine` from `dart:ui_web` instead.
The debugEmulateFlutterTesterEnvironment getter is deprecated and will be removed in a future release. Please use `debugEmulateFlutterTesterEnvironment` from `dart:ui_web` instead.
I am also seeing this warning in a separate project, even though the app is using the correct (non-deprecated) API:
The platformViewRegistry getter is deprecated and will be removed in a future release. Please import it from `dart:ui_web` instead.
Is there an existing issue for this?
- I have searched the existing issues
- I have read the guide to filing a bug
Steps to reproduce
- Create a new Flutter project
- Run the app in Chrome
- Observe warnigns
Expected results
Warnings should not be printed.
Actual results
Warnings are printed
Code sample
Code sample
import 'package:flutter/material.dart';
void main() {
runApp(const MyApp());
}
class MyApp extends StatelessWidget {
const MyApp({super.key});
// This widget is the root of your application.
@override
Widget build(BuildContext context) {
return MaterialApp(
title: 'Flutter Demo',
theme: ThemeData(
// This is the theme of your application.
//
// TRY THIS: Try running your application with "flutter run". You'll see
// the application has a blue toolbar. Then, without quitting the app,
// try changing the seedColor in the colorScheme below to Colors.green
// and then invoke "hot reload" (save your changes or press the "hot
// reload" button in a Flutter-supported IDE, or press "r" if you used
// the command line to start the app).
//
// Notice that the counter didn't reset back to zero; the application
// state is not lost during the reload. To reset the state, use hot
// restart instead.
//
// This works for code too, not just values: Most code changes can be
// tested with just a hot reload.
colorScheme: ColorScheme.fromSeed(seedColor: Colors.deepPurple),
useMaterial3: true,
),
home: const MyHomePage(title: 'Flutter Demo Home Page'),
);
}
}
class MyHomePage extends StatefulWidget {
const MyHomePage({super.key, required this.title});
// This widget is the home page of your application. It is stateful, meaning
// that it has a State object (defined below) that contains fields that affect
// how it looks.
// This class is the configuration for the state. It holds the values (in this
// case the title) provided by the parent (in this case the App widget) and
// used by the build method of the State. Fields in a Widget subclass are
// always marked "final".
final String title;
@override
State<MyHomePage> createState() => _MyHomePageState();
}
class _MyHomePageState extends State<MyHomePage> {
int _counter = 0;
void _incrementCounter() {
setState(() {
// This call to setState tells the Flutter framework that something has
// changed in this State, which causes it to rerun the build method below
// so that the display can reflect the updated values. If we changed
// _counter without calling setState(), then the build method would not be
// called again, and so nothing would appear to happen.
_counter++;
});
}
@override
Widget build(BuildContext context) {
// This method is rerun every time setState is called, for instance as done
// by the _incrementCounter method above.
//
// The Flutter framework has been optimized to make rerunning build methods
// fast, so that you can just rebuild anything that needs updating rather
// than having to individually change instances of widgets.
return Scaffold(
appBar: AppBar(
// TRY THIS: Try changing the color here to a specific color (to
// Colors.amber, perhaps?) and trigger a hot reload to see the AppBar
// change color while the other colors stay the same.
backgroundColor: Theme.of(context).colorScheme.inversePrimary,
// Here we take the value from the MyHomePage object that was created by
// the App.build method, and use it to set our appbar title.
title: Text(widget.title),
),
body: Center(
// Center is a layout widget. It takes a single child and positions it
// in the middle of the parent.
child: Column(
// Column is also a layout widget. It takes a list of children and
// arranges them vertically. By default, it sizes itself to fit its
// children horizontally, and tries to be as tall as its parent.
//
// Column has various properties to control how it sizes itself and
// how it positions its children. Here we use mainAxisAlignment to
// center the children vertically; the main axis here is the vertical
// axis because Columns are vertical (the cross axis would be
// horizontal).
//
// TRY THIS: Invoke "debug painting" (choose the "Toggle Debug Paint"
// action in the IDE, or press "p" in the console), to see the
// wireframe for each widget.
mainAxisAlignment: MainAxisAlignment.center,
children: <Widget>[
const Text(
'You have pushed the button this many times:',
),
Text(
'$_counter',
style: Theme.of(context).textTheme.headlineMedium,
),
],
),
),
floatingActionButton: FloatingActionButton(
onPressed: _incrementCounter,
tooltip: 'Increment',
child: const Icon(Icons.add),
), // This trailing comma makes auto-formatting nicer for build methods.
);
}
}Screenshots or Video
No response
Logs
Logs
The webOnlyWarmupEngine API is deprecated and will be removed in a future release. Please use `bootstrapEngine` from `dart:ui_web` instead.
The debugEmulateFlutterTesterEnvironment getter is deprecated and will be removed in a future release. Please use `debugEmulateFlutterTesterEnvironment` from `dart:ui_web` instead.Flutter Doctor output
Doctor output
flutter doctor -v
[✓] Flutter (Channel stable, 3.13.0, on macOS 13.5 22G74 darwin-arm64, locale
en)
• Flutter version 3.13.0 on channel stable at
/Users/ryjohn/code/sdks/flutter
• Upstream repository https://github.com/flutter/flutter.git
• Framework revision efbf63d9c6 (7 days ago), 2023-08-15 21:05:06 -0500
• Engine revision 1ac611c64e
• Dart version 3.1.0
• DevTools version 2.25.0
[✓] Android toolchain - develop for Android devices (Android SDK version
32.1.0-rc1)
• Android SDK at /Users/ryjohn/Library/Android/sdk
• Platform android-33, build-tools 32.1.0-rc1
• Java binary at: /Users/ryjohn/Library/Application
Support/JetBrains/Toolbox/apps/AndroidStudio/ch-0/222.4459.24.2221.1012163
9/Android Studio.app/Contents/jbr/Contents/Home/bin/java
• Java version OpenJDK Runtime Environment (build
17.0.6+0-17.0.6b802.4-9586694)
• All Android licenses accepted.
[✓] Xcode - develop for iOS and macOS (Xcode 14.2)
• Xcode at /Applications/Xcode.app/Contents/Developer
• Build 14C18
• CocoaPods version 1.12.1
[✓] Chrome - develop for the web
• Chrome at /Applications/Google Chrome.app/Contents/MacOS/Google Chrome
[✓] Android Studio (version 2021.1)
• Android Studio at /Applications/Android Studio.app/Contents
• Flutter plugin can be installed from:
🔨 https://plugins.jetbrains.com/plugin/9212-flutter
• Dart plugin can be installed from:
🔨 https://plugins.jetbrains.com/plugin/6351-dart
• Java version OpenJDK Runtime Environment (build 11.0.11+0-b60-7772763)
[✓] Android Studio (version 2022.2)
• Android Studio at /Users/ryjohn/Library/Application
Support/JetBrains/Toolbox/apps/AndroidStudio/ch-0/222.4459.24.2221.1012163
9/Android Studio.app/Contents
• Flutter plugin can be installed from:
🔨 https://plugins.jetbrains.com/plugin/9212-flutter
• Dart plugin can be installed from:
🔨 https://plugins.jetbrains.com/plugin/6351-dart
• Java version OpenJDK Runtime Environment (build
17.0.6+0-17.0.6b802.4-9586694)
[✓] Android Studio (version 2022.1)
• Android Studio at /Users/ryjohn/Library/Application
Support/JetBrains/Toolbox/apps/AndroidStudio/ch-0/221.6008.13.2211.9619390
/Android Studio.app/Contents
• Flutter plugin can be installed from:
🔨 https://plugins.jetbrains.com/plugin/9212-flutter
• Dart plugin can be installed from:
🔨 https://plugins.jetbrains.com/plugin/6351-dart
• Java version OpenJDK Runtime Environment (build
11.0.15+0-b2043.56-8887301)
[✓] IntelliJ IDEA Ultimate Edition (version 2023.1.3)
• IntelliJ at /Users/ryjohn/Applications/JetBrains Toolbox/IntelliJ IDEA
Ultimate.app
• Flutter plugin version 74.0.4
• Dart plugin version 231.9161.14
[✓] IntelliJ IDEA Ultimate Edition (version 2023.1.3)
• IntelliJ at /Users/ryjohn/Library/Application
Support/JetBrains/Toolbox/apps/IDEA-U/ch-0/231.9161.38/IntelliJ IDEA.app
• Flutter plugin can be installed from:
🔨 https://plugins.jetbrains.com/plugin/9212-flutter
• Dart plugin can be installed from:
🔨 https://plugins.jetbrains.com/plugin/6351-dart
[✓] IntelliJ IDEA Ultimate Edition (version 2023.1)
• IntelliJ at /Users/ryjohn/Library/Application
Support/JetBrains/Toolbox/apps/IDEA-U/ch-0/231.8109.175/IntelliJ IDEA.app
• Flutter plugin can be installed from:
🔨 https://plugins.jetbrains.com/plugin/9212-flutter
• Dart plugin can be installed from:
🔨 https://plugins.jetbrains.com/plugin/6351-dart
[✓] VS Code (version 1.81.1)
• VS Code at /Applications/Visual Studio Code.app/Contents
• Flutter extension version 3.70.0
[✓] Connected device (2 available)
• macOS (desktop) • macos • darwin-arm64 • macOS 13.5 22G74 darwin-arm64
• Chrome (web) • chrome • web-javascript • Google Chrome 116.0.5845.96
[✓] Network resources
• All expected network resources are available.
• No issues found!Metadata
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High-priority issues at the top of the work listEmbedding Android/iOS views in Flutter appsFound to occur in 3.14The issue has been confirmed reproducible and is ready to work onWeb applications specificallyIssue is closed as already fixed in a newer versionOwned by Web platform teamTriaged by Web platform team