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'),
),
],
),
),validator flutter
final passwordValidator = MultiValidator([
RequiredValidator(errorText: 'password is required'),
MinLengthValidator(8, errorText: 'password must be at least 8 digits long'),
PatternValidator(r'(?=.*?[#?!@$%^&*-])', errorText: 'passwords must have at least one special character')
]);
String password;
Form(
key: _formKey,
child: Column(children: [
TextFormField(
obscureText: true,
onChanged: (val) => password = val,
// assign the the multi validator to the TextFormField validator
validator: passwordValidator,
),
// using the match validator to confirm password
TextFormField(
validator: (val) => MatchValidator(errorText: 'passwords do not match').validateMatch(val, password),
)
]),
);Copyright © 2021 Codeinu
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