Inspect focus trees

focus_tree_inspector is a best-effort tool to inspect:

• the focus tree
• current focus manager state
• track primary focus

It is designed for debugging and development workflows, not for production runtime diagnostics guarantees.

How it works

This package consists of two parts:

• a DevTools extension UI
• an app-side bridge that must be registered in the target Flutter app

The DevTools extension reads data through service extensions exposed by the bridge.

Register the bridge in your app

Register the bridge as early as possible (typically in main() before runApp):

import 'package:flutter/material.dart';
import 'package:focus_tree_inspector/focus_tree_inspector.dart';

void main() {
  FocusTreeInspector.instance.registerFocusTreeBridge();
  runApp(const MyApp());
}

Once registered, open DevTools and use the extension to inspect focus tree data, focus manager state, and primary focus.

Contributing

Contributions are welcome! Please feel free to submit a Pull Request.

License

This package is licensed under the MIT License. See LICENSE for details.

Libraries

focus_tree_inspector

DevTools extension bridge for inspecting Flutter focus data.

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