Formidable Validator — Formdator is a fully object-oriented package for validating form fields before they get processed. Its key benefits, compared to all other similar packages, include:
Trim(ReqEmail())
for a “trimmed-required-email”, it trims the entered email before trying to validate it.Rules
class.Req
for a required (non-blank) field; ReqEmail
for a non-blank and well-formed email; MinLen
for a minimum number of characters.call()
method.For easier integration with the fields of a Flutter form, each validator implements the call()
method; therefore, any validator can be treated as an ordinary function.
A flexible package provides components that can be selected and grouped in various combinations so that user requirements can be fulfilled.
As a demonstration of such combinations of components, the code below shows how you can easily group Trim
and Email
to form a trimmed-email field with a custom error message in case of a malformed email.
@override
Widget build(BuildContext context) {
return TextFormField(
onSaved: _onSaved,
validator: Trim(Email(mal: 'malformed email.')),
keyboardType: TextInputType.emailAddress,
);
}
The demo application provides a fully working example, focused on demonstrating exactly four validators in action — Rules, ReqEmail and Equal. You can take the code in this demo and experiment with it.
To run the demo application:
git clone https://github.com/dartoos-dev/formdator.git
cd formdator/example/
flutter run -d chrome
This should launch the demo application on Chrome in debug mode.
Author: dartoos-dev
Download Link: Download The Source Code
Official Website: https://github.com/dartoos-dev/formdator
License: MIT
#dart #flutter