Q:

Showing an error under a TextField in Flutter

Material design allows a text field to indicate an error via a small red label under the input box: https://material.io/components/text-fields (see screenshot below).
Is there a way to achieve this for a TextField field in Flutter? I expected this to be a property of either TextField or TextEditingController, but haven't found anything like it.

A:

It is present in the decoration property in TextField, also you can style it using it's style property.
     TextField(
        decoration: InputDecoration(
          errorStyle: TextStyle(),
          errorText: 'Please enter something'
        ),
      ),

