flutter form
final GlobalKey<FormState> _formKey = GlobalKey<FormState>();
Form(
key: _formKey,
child: Column(
crossAxisAlignment: CrossAxisAlignment.center,
children: <Widget>[
TextFormField(
decoration: const InputDecoration(
hintText: 'Enter your email',
),
),
ElevatedButton(
onPressed: () { },
child: const Text('Submit'),
),
],
),
),