Autovalidate of TextFormField is deprecated in Flutter

'autovalidate' is deprecated and shouldn't be used. Use autoValidateMode parameter which provide more specific behaviour related to auto validation. This feature was deprecated after v1.19.0.. Try replacing the use of the deprecated member with the replacement. enter image description here

autovalidate is replaced by autovalidateMode

Auto validation is deprecated and replaced by an enum. So you should migrate to the new version.

All you need to do is replace autovalidate: true with autovalidateMode: AutovalidateMode.always

The different supported modes are

1. AutovalidateMode.always
2. AutovalidateMode.disabled
3. AutovalidateMode.onUserInteraction

Example:

Code before migration:

class MyWidget extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return FormField(
      autovalidate: true,
      builder: (FormFieldState state) {
        return Container();
      },
    );
  }
}

Code after migration:

class MyWidget extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return FormField(
      autovalidateMode: AutovalidateMode.always,
      builder: (FormFieldState state) {
        return Container();
      },
    );
  }
}

More about autovalidateMode