avoid_unnecessary_containers
Unnecessary instance of 'Container'.
Description
#The analyzer produces this diagnostic when a widget tree contains an instance of Container
and the only argument to the constructor is child:
.
Example
#The following code produces this diagnostic because the invocation of the Container
constructor only has a child:
argument:
import 'package:flutter/material.dart';
Widget buildRow() {
return Container(
child: Row(
children: [
Text('a'),
Text('b'),
],
)
);
}
Common fixes
#If you intended to provide other arguments to the constructor, then add them:
import 'package:flutter/material.dart';
Widget buildRow() {
return Container(
color: Colors.red.shade100,
child: Row(
children: [
Text('a'),
Text('b'),
],
)
);
}
If no other arguments are needed, then unwrap the child widget:
import 'package:flutter/material.dart';
Widget buildRow() {
return Row(
children: [
Text('a'),
Text('b'),
],
);
}
Unless stated otherwise, the documentation on this site reflects Dart 3.7.3. Page last updated on 2025-05-08. View source or report an issue.