What is the difference between functions and classes to create reusable widgets?

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I have realized that it is possible to create widgets using plain functions instead of subclassing StatelessWidget. An example would be this: 

Widget function({ String title, VoidCallback callback }) {
  return GestureDetector(
    onTap: callback,
    child: // some widget
  );
}

This is interesting because it requires far less code than a full-blown class. Example:

class SomeWidget extends StatelessWidget {
  final VoidCallback callback;
  final String title;

  const SomeWidget({Key key, this.callback, this.title}) : super(key: key);

  @override
  Widget build(BuildContext context) {
      return GestureDetector(
        onTap: callback,
        child: // some widget
      );
  }
}

So I’ve been wondering: Is there any difference besides syntax between functions and classes to create widgets? And is it a good practice to use functions?

5 Answers
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