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Enabling accessibility semantics causes errors on Flutter web #173239

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#175876
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Enabling accessibility semantics causes errors on Flutter web#173239
#175876
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flutter-zl
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P1High-priority issues at the top of the work lista: accessibilityAccessibility, e.g. VoiceOver or TalkBack. (aka a11y)a: text inputEntering text in a text field or keyboard related problemsc: crashStack traces logged to the consolec: regressionIt was better in the past than it is nowfound in release: 3.32Found to occur in 3.32found in release: 3.33Found to occur in 3.33fyi-accessibilityFor the attention of Framework Accessibility teamhas reproducible stepsThe issue has been confirmed reproducible and is ready to work onplatform-webWeb applications specificallyr: fixedIssue is closed as already fixed in a newer versionteam-webOwned by Web platform teamtriaged-webTriaged by Web platform team
@dmitry-fbm

Description

@dmitry-fbm
dmitry-fbm
opened on Aug 4, 2025

Steps to reproduce

These are two separate bugs but reporting together as both concern the same input field type.

Cursor wouldn't move when typing in

This looks like a regression, hadn't been noticed in previous versions. When changing to keyboardType: TextInputType.text, the issue is gone.

Repositioning cursor into field that already has text triggers error:

InvalidStateError: The input element's type ('email') does not support selection.

Log entries
Details 
dart://_internal/js_shared/lib/js_util_patch.dart 173:10            DomHTMLInputElement|setSelectionRange
org-dartlang-sdk:///lib/_engine/engine/text_editing/text_editing.dart 1438:21                 DefaultTextEditingStrategy.setEditingState
org-dartlang-sdk:///lib/_engine/engine/text_editing/text_editing.dart 1559:7                  DefaultTextEditingStrategy.enable
org-dartlang-sdk:///lib/_engine/engine/semantics/text_field.dart 81:11                        SemanticsTextEditingStrategy.activate
org-dartlang-sdk:///lib/_engine/engine/semantics/semantics.dart 2008:9                        SemanticsObject._updateRole
org-dartlang-sdk:///lib/_engine/engine/semantics/semantics.dart 1692:5                        EngineSemanticsOwner.updateSemantics
org-dartlang-sdk:///lib/_engine/engine/window.dart 109:15                                     RenderView.updateSemantics
../../../../../../flutter/packages/flutter/lib/src/semantics/semantics.dart 4246:5            SemanticsOwner.sendSemanticsUpdate
../../../../../../flutter/packages/flutter/lib/src/rendering/object.dart 1502:7               PipelineOwner.flushSemantics
../../../../../../flutter/packages/flutter/lib/src/rendering/object.dart 1504:9               PipelineOwner.flushSemantics
../../../../../../flutter/packages/flutter/lib/src/rendering/binding.dart 325:22              RendererBinding.rootPipelineOwner
../../../../../../flutter/packages/flutter/lib/src/widgets/binding.dart 1242:13               _WidgetsFlutterBinding&BindingBase&GestureBinding&SchedulerBinding&ServicesBinding&PaintingBinding&SemanticsBinding&RendererBinding&WidgetsBinding.drawFrame
../../../../../../flutter/packages/flutter/lib/src/rendering/binding.dart 495:5               RendererBinding._handlePersistentFrameCallback
dart://_internal/js_runtime/lib/js_helper.dart 2621:9               Closure.cspForwardCall
../../../../../../flutter/packages/flutter/lib/src/scheduler/binding.dart 1438:7              SchedulerBinding._invokeFrameCallback
../../../../../../flutter/packages/flutter/lib/src/scheduler/binding.dart 1351:9              SchedulerBinding.handleDrawFrame
../../../../../../flutter/packages/flutter/lib/src/scheduler/binding.dart 1204:5              SchedulerBinding._handleDrawFrame
dart://_internal/js_runtime/lib/js_helper.dart 2610:9               Closure.cspForwardCall
org-dartlang-sdk:///lib/_engine/engine/platform_dispatcher.dart 1312:5                        invoke
org-dartlang-sdk:///lib/_engine/engine/platform_dispatcher.dart 255:5                         FrameService._renderFrame
dart://async/zone.dart 1546:12                                      _rootRunUnary
dart://async/zone.dart 1428:34                                      _CustomZone.runUnary
dart://_internal/js_runtime/lib/js_allow_interop_patch.dart 363:27  _callDartFunctionFast1

Expected results

Cursor should follow typed in chars; there should be no error when returning focus to a prefilled field.

Actual results

See above.

Code sample

Code sample 
keyboardType: TextInputType.emailAddress

Screenshots or Video

Screenshots / Video demonstration Image

Logs

Logs 
dart://_internal/js_shared/lib/js_util_patch.dart 173:10            DomHTMLInputElement|setSelectionRange
org-dartlang-sdk:///lib/_engine/engine/text_editing/text_editing.dart 1438:21                 DefaultTextEditingStrategy.setEditingState
org-dartlang-sdk:///lib/_engine/engine/text_editing/text_editing.dart 1559:7                  DefaultTextEditingStrategy.enable
org-dartlang-sdk:///lib/_engine/engine/semantics/text_field.dart 81:11                        SemanticsTextEditingStrategy.activate
org-dartlang-sdk:///lib/_engine/engine/semantics/semantics.dart 2008:9                        SemanticsObject._updateRole
org-dartlang-sdk:///lib/_engine/engine/semantics/semantics.dart 1692:5                        EngineSemanticsOwner.updateSemantics
org-dartlang-sdk:///lib/_engine/engine/window.dart 109:15                                     RenderView.updateSemantics
../../../../../../flutter/packages/flutter/lib/src/semantics/semantics.dart 4246:5            SemanticsOwner.sendSemanticsUpdate
../../../../../../flutter/packages/flutter/lib/src/rendering/object.dart 1502:7               PipelineOwner.flushSemantics
../../../../../../flutter/packages/flutter/lib/src/rendering/object.dart 1504:9               PipelineOwner.flushSemantics
../../../../../../flutter/packages/flutter/lib/src/rendering/binding.dart 325:22              RendererBinding.rootPipelineOwner
../../../../../../flutter/packages/flutter/lib/src/widgets/binding.dart 1242:13               _WidgetsFlutterBinding&BindingBase&GestureBinding&SchedulerBinding&ServicesBinding&PaintingBinding&SemanticsBinding&RendererBinding&WidgetsBinding.drawFrame
../../../../../../flutter/packages/flutter/lib/src/rendering/binding.dart 495:5               RendererBinding._handlePersistentFrameCallback
dart://_internal/js_runtime/lib/js_helper.dart 2621:9               Closure.cspForwardCall
../../../../../../flutter/packages/flutter/lib/src/scheduler/binding.dart 1438:7              SchedulerBinding._invokeFrameCallback
../../../../../../flutter/packages/flutter/lib/src/scheduler/binding.dart 1351:9              SchedulerBinding.handleDrawFrame
../../../../../../flutter/packages/flutter/lib/src/scheduler/binding.dart 1204:5              SchedulerBinding._handleDrawFrame
dart://_internal/js_runtime/lib/js_helper.dart 2610:9               Closure.cspForwardCall
org-dartlang-sdk:///lib/_engine/engine/platform_dispatcher.dart 1312:5                        invoke
org-dartlang-sdk:///lib/_engine/engine/platform_dispatcher.dart 255:5                         FrameService._renderFrame
dart://async/zone.dart 1546:12                                      _rootRunUnary
dart://async/zone.dart 1428:34                                      _CustomZone.runUnary
dart://_internal/js_runtime/lib/js_allow_interop_patch.dart 363:27  _callDartFunctionFast1

Flutter Doctor output

Doctor output 
[✓] Flutter (Channel stable, 3.32.8, on macOS 15.3.2 24D81 darwin-arm64, locale en-US) [220ms]
  • Flutter version 3.32.8 on channel stable at /Users/ilija/flutter
  • Upstream repository https://github.com/flutter/flutter.git
  • Framework revision edada7c56e (10 days ago), 2025-07-25 14:08:03 +0000
  • Engine revision ef0cd00091
  • Dart version 3.8.1
  • DevTools version 2.45.1

[✓] Android toolchain - develop for Android devices (Android SDK version 36.0.0) [807ms]
  • Android SDK at /Users/ilija/Library/Android/sdk
  • Platform android-36, build-tools 36.0.0
  • Java binary at: /opt/homebrew/opt/openjdk@17/bin/java
   This JDK is specified in your Flutter configuration.
   To change the current JDK, run: `flutter config --jdk-dir="path/to/jdk"`.
  • Java version OpenJDK Runtime Environment Homebrew (build 17.0.14+0)
  • All Android licenses accepted.

[✓] Xcode - develop for iOS and macOS (Xcode 16.2) [440ms]
  • Xcode at /Applications/Xcode.app/Contents/Developer
  • Build 16C5032a
  • CocoaPods version 1.16.2

[✓] Chrome - develop for the web [7ms]
  • Chrome at /Applications/Google Chrome.app/Contents/MacOS/Google Chrome

[✓] Android Studio (version 2025.1) [7ms]
  • Android Studio at /Applications/Android Studio.app/Contents
  • Flutter plugin can be installed from:
   :hammer: https://plugins.jetbrains.com/plugin/9212-flutter
  • Dart plugin can be installed from:
   :hammer: https://plugins.jetbrains.com/plugin/6351-dart
  • Java version OpenJDK Runtime Environment (build 21.0.6+-13391695-b895.109)

[✓] Connected device (2 available) [5.6s]
  • macOS (desktop) • macos • darwin-arm64  • macOS 15.3.2 24D81 darwin-arm64
  • Chrome (web)  • chrome • web-javascript • Google Chrome 134.0.6998.166

[✓] Network resources [321ms]
  • All expected network resources are available.

• No issues found!

[✓] Flutter (Channel stable, 3.32.8, on macOS 15.3.2 24D81 darwin-arm64, locale en-US) [220ms]
  • Flutter version 3.32.8 on channel stable at /Users/ilija/flutter
  • Upstream repository https://github.com/flutter/flutter.git
  • Framework revision edada7c56e (10 days ago), 2025-07-25 14:08:03 +0000
  • Engine revision ef0cd00091
  • Dart version 3.8.1
  • DevTools version 2.45.1

[✓] Android toolchain - develop for Android devices (Android SDK version 36.0.0) [807ms]
  • Android SDK at /Users/ilija/Library/Android/sdk
  • Platform android-36, build-tools 36.0.0
  • Java binary at: /opt/homebrew/opt/openjdk@17/bin/java
   This JDK is specified in your Flutter configuration.
   To change the current JDK, run: `flutter config --jdk-dir="path/to/jdk"`.
  • Java version OpenJDK Runtime Environment Homebrew (build 17.0.14+0)
  • All Android licenses accepted.

[✓] Xcode - develop for iOS and macOS (Xcode 16.2) [440ms]
  • Xcode at /Applications/Xcode.app/Contents/Developer
  • Build 16C5032a
  • CocoaPods version 1.16.2

[✓] Chrome - develop for the web [7ms]
  • Chrome at /Applications/Google Chrome.app/Contents/MacOS/Google Chrome

[✓] Android Studio (version 2025.1) [7ms]
  • Android Studio at /Applications/Android Studio.app/Contents
  • Flutter plugin can be installed from:
   :hammer: https://plugins.jetbrains.com/plugin/9212-flutter
  • Dart plugin can be installed from:
   :hammer: https://plugins.jetbrains.com/plugin/6351-dart
  • Java version OpenJDK Runtime Environment (build 21.0.6+-13391695-b895.109)

[✓] Connected device (2 available) [5.6s]
  • macOS (desktop) • macos • darwin-arm64  • macOS 15.3.2 24D81 darwin-arm64
  • Chrome (web)  • chrome • web-javascript • Google Chrome 134.0.6998.166

[✓] Network resources [321ms]
  • All expected network resources are available.

• No issues found!

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Labels

P1High-priority issues at the top of the work lista: accessibilityAccessibility, e.g. VoiceOver or TalkBack. (aka a11y)a: text inputEntering text in a text field or keyboard related problemsc: crashStack traces logged to the consolec: regressionIt was better in the past than it is nowfound in release: 3.32Found to occur in 3.32found in release: 3.33Found to occur in 3.33fyi-accessibilityFor the attention of Framework Accessibility teamhas reproducible stepsThe issue has been confirmed reproducible and is ready to work onplatform-webWeb applications specificallyr: fixedIssue is closed as already fixed in a newer versionteam-webOwned by Web platform teamtriaged-webTriaged by Web platform team

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