[Flutter Web] TypeError JSArray

[tpucci]

Which packages are you using?

stream_chat_flutter

On what platforms did you experience the issue?

Web

What version are you using?

stream_chat_flutter_core 8.3.0
stream_chat 8.3.0
stream_chat_persistence 8.0.0
stream_channel 2.1.4

What happened?

Hello there :)

I have an issue on the web that pollutes the console.

errors.dart:307 Uncaught (in promise) DartError: TypeError: Instance of 'JSArray<dynamic>': type 'List<dynamic>' is not a subtype of type 'Iterable<User>'
    at Object.throw_ [as throw] (errors.dart:307:3)
    at Object._failedAsCheck (profile.dart:117:39)
    at dart_rti.Rti.new._generalAsCheckImplementation (rti.dart:1554:3)
    at [dartx.addAll] (operations.dart:266:9)
    at channel.dart:2519:31
    at channel$.ChannelClientState.new.updateChannelState (channel.dart:2519:31)
    at channel.dart:2642:15
    at _RootZone.runUnaryGuarded (zone.dart:1778:9)
    at [_sendData] (stream_impl.dart:381:5)
    at [_add] (stream_impl.dart:312:7)
    at [_add] (stream_pipe.dart:154:11)
    at [_handleData] (stream_pipe.dart:229:11)
    at [_handleData] (stream_pipe.dart:184:5)
    at _RootZone.runUnaryGuarded (zone.dart:1778:9)
    at [_sendData] (stream_impl.dart:381:5)
    at [_add] (stream_impl.dart:312:7)
    at [_add] (stream_pipe.dart:154:11)
    at [_handleData] (stream_pipe.dart:229:11)
    at [_handleData] (stream_pipe.dart:184:5)
    at _RootZone.runUnaryGuarded (zone.dart:1778:9)
    at [_sendData] (stream_impl.dart:381:5)
    at [_add] (stream_impl.dart:312:7)
    at async._MultiStreamController.new.addSync (stream_impl.dart:1194:36)
    at forwarding_stream._MultiControllerSink.new.add (forwarding_stream.dart:135:35)
    at start_with._StartWithStreamSink.new.onData (start_with.dart:12:31)
    at _RootZone.runUnaryGuarded (zone.dart:1778:9)
    at [_sendData] (stream_impl.dart:381:5)
    at async._DelayedData.new.perform (stream_impl.dart:573:13)
    at async._PendingEvents.new.handleNext (stream_impl.dart:678:10)
    at async._AsyncCallbackEntry.new.callback (stream_impl.dart:649:7)
    at Object._microtaskLoop (schedule_microtask.dart:40:11)
    at _startMicrotaskLoop (schedule_microtask.dart:49:5)
    at async_patch.dart:186:7

Steps to reproduce

Run the example project on the web.

Supporting info to reproduce

No response

Relevant log output

Flutter analyze output

Flutter doctor output

❯ flutter doctor -v
[✓] Flutter (Channel stable, 3.29.2, on macOS 15.3.2 24D81 darwin-arm64, locale en-FR) [1,753ms]
    • Flutter version 3.29.2 on channel stable at /Users/thomaspucci/.asdf/installs/flutter/3.29.2-stable
    • Upstream repository https://github.com/flutter/flutter.git
    • Framework revision c236373904 (3 weeks ago), 2025-03-13 16:17:06 -0400
    • Engine revision 18b71d647a
    • Dart version 3.7.2
    • DevTools version 2.42.3

[✓] Android toolchain - develop for Android devices (Android SDK version 35.0.1) [1,939ms]
    • Android SDK at /Users/thomaspucci/Library/Android/sdk
    • Platform android-35, build-tools 35.0.1
    • ANDROID_HOME = /Users/thomaspucci/Library/Android/sdk
    • ANDROID_SDK_ROOT = /Users/thomaspucci/Library/Android/sdk
    • Java binary at: /Applications/Android Studio.app/Contents/jbr/Contents/Home/bin/java
      This is the JDK bundled with the latest Android Studio installation on this machine.
      To manually set the JDK path, use: `flutter config --jdk-dir="path/to/jdk"`.
    • Java version OpenJDK Runtime Environment (build 21.0.5+-13047016-b750.29)
    • All Android licenses accepted.

[✓] Xcode - develop for iOS and macOS (Xcode 16.3) [1,584ms]
    • Xcode at /Applications/Xcode.app/Contents/Developer
    • Build 16E140
    • CocoaPods version 1.16.2

[✓] Chrome - develop for the web [32ms]
    • Chrome at /Applications/Google Chrome.app/Contents/MacOS/Google Chrome

[✓] Android Studio (version 2024.2) [31ms]
    • 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 21.0.5+-13047016-b750.29)

[✓] IntelliJ IDEA Ultimate Edition (version 2024.3.4) [30ms]
    • IntelliJ at /Applications/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 1.98.2) [11ms]
    • VS Code at /Applications/Visual Studio Code.app/Contents
    • Flutter extension version 3.108.0

[✓] Connected device (4 available) [6.1s]
    • iPhone 16 (mobile)              • FC0BA2B6-3BB3-4C7A-9FA7-752251001687 • ios            •
      com.apple.CoreSimulator.SimRuntime.iOS-18-3 (simulator)
    • macOS (desktop)                 • macos                                • darwin-arm64   • macOS 15.3.2 24D81
      darwin-arm64
    • Mac Designed for iPad (desktop) • mac-designed-for-ipad                • darwin         • macOS 15.3.2 24D81
      darwin-arm64
    • Chrome (web)                    • chrome                               • web-javascript • Google Chrome 134.0.6998.166

[✓] Network resources [261ms]
    • All expected network resources are available.

• No issues found!

Code of Conduct

• I agree to follow this project's Code of Conduct

[xsahil03x]

Hey @tpucci , should be fixed in stream_chat: 8.3.1

[river2202]

@xsahil03x I have same issue in 9.x version, should the same fix to to there?

[river2202]

I see it has been merged to master and released since 9.7.0, the problem seems there still more JSArray Error. I will see if I can fix them in 9.8

[river2202]

#2224