Contents

sort_child_properties_last

Contents
Stable
Flutter
Fix available

Sort child properties last in widget instance creations.

Details

#

Sort child properties last in widget instance creations. This improves readability and plays nicest with UI as Code visualization in IDEs with UI as Code Guides in editors (such as IntelliJ) where Properties in the correct order appear clearly associated with the constructor call and separated from the children.

BAD:

dart
return Scaffold(
  appBar: AppBar(
    title: Text(widget.title),
  ),
  body: Center(
    child: Column(
      children: <Widget>[
        Text(
          'You have pushed the button this many times:',
         ),
        Text(
          '$_counter',
          style: Theme.of(context).textTheme.display1,
         ),
      ],
      mainAxisAlignment: MainAxisAlignment.center,
    ),
    widthFactor: 0.5,
  ),
  floatingActionButton: FloatingActionButton(
    child: Icon(Icons.add),
    onPressed: _incrementCounter,
    tooltip: 'Increment',
  ),
);

GOOD:

dart
return Scaffold(
  appBar: AppBar(
    title: Text(widget.title),
  ),
  body: Center(
    widthFactor: 0.5,
    child: Column(
      mainAxisAlignment: MainAxisAlignment.center,
      children: <Widget>[
        Text(
          'You have pushed the button this many times:',
         ),
        Text(
          '$_counter',
          style: Theme.of(context).textTheme.display1,
         ),
      ],
    ),
  ),
  floatingActionButton: FloatingActionButton(
    onPressed: _incrementCounter,
    tooltip: 'Increment',
    child: Icon(Icons.add),
  ),
);

Exception: It's allowed to have parameter with a function expression after the child property.

Enable

#

To enable the sort_child_properties_last rule, add sort_child_properties_last under linter > rules in your analysis_options.yaml file:

analysis_options.yaml
yaml
linter:
  rules:
    - sort_child_properties_last

If you're instead using the YAML map syntax to configure linter rules, add sort_child_properties_last: true under linter > rules:

analysis_options.yaml
yaml
linter:
  rules:
    sort_child_properties_last: true

Unless stated otherwise, the documentation on this site reflects Dart 3.6.0. Page last updated on 2025-01-27. View source or report an issue.