avoid-border-all

added in: 1.0.0performance

Border.all constructor calls const Border.fromBorderSide constructor under the hood. This rule allows to replace Border.all with const Border.fromBorderSide.

Example

Bad:

class BorderWidget extends StatelessWidget {
  final Widget child;

  const RoundedWidget({
    Key? key,
    required this.child,
  }) : super(key: key);

  @override
  Widget build(BuildContext context) {
    return Container(
      //LINT
      border: Border.all(
        color: const Color(0xFF000000),
        width: 1.0,
        style: BorderStyle.solid,
      ),
      child: child,
    );
  }
}

Good:

class BorderWidget extends StatelessWidget {
  final Widget child;

  const RoundedWidget({
    Key? key,
    required this.child,
  }) : super(key: key);

  @override
  Widget build(BuildContext context) {
    return Container(
      border: const Border.fromBorderSide(BorderSide(
        color: const Color(0xFF000000),
        width: 1.0,
        style: BorderStyle.solid,
      )),
      child: child,
    );
  }
}