A low-code and lightweight Flutter form library

loform

loform is still experimental, missing features and bugs are to be expected.

loform is a low-code and lightweight flutter form library, inspired by formik — the world’s most popular form library for react, used in production at airbnb, stripe, nasa and more.

features

1. no boilerplate: 90% less code compared to bloc + formz.
2. informational: provides a lot of useful states (touched, status, error) for each field in the form.
3. server-errors friendly: unlike flutter_form_builder which requires external errors to be managed by a separate state.
4. reusable and easy validation: uses the builder pattern for building validations.

simple usage

this is a simple example, for a more complex one see the registerform widget.

class simpleform extends statelesswidget {

  @override
  widget build(buildcontext context) {
    // [1] wrap your form with [loform] widget.
    return loform(
      // [2] choose when the submit button is enabled using form status.
      submittablewhen: (status) => status.isvalid || status.issubmitted,
      // [3] implement what happens when the form is submitted.
      onsubmit: (values) async {
        print('hi, ${values.get('name')}!');
        return true; // successful submission
      },
      builder: (form) {
        return column(
          children: [
            // [4] use [lotextfield] instead of the normal [textfield].
            lotextfield(
              // [5] this name will be used to get the field's value.
              name: 'name',
              // [6] provide a validation scheme using [lovalidation].
              validate: lovalidation().required().build(),
            ),
            const sizedbox(height: 32),
            elevatedbutton(
              // [7] call the [submit] method.
              onpressed: form.submit,
              child: const text('submit'),
            ),
          ],
        );
      },
    );
  }

}