HTML::FormFu::Constraint::CallbackOnce - Code Callback Constraint

       Carl Franks <cpan@fireartist.com>

       This software is copyright (c) 2018 by Carl Franks.

       This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5
       programming language system itself.

perl v5.38.2                                       2024-04-10             HTML::FormFu::C...t::CallbackOnce(3pm)

       Unlinke the HTML::FormFu::Constraint::Callback, this callback is only called once, regardless of how many
       values are submitted.

       The first argument passed to the callback is the submitted value for the associated field; this may be a
       single value or an arrayref of value.  The second argument passed to the callback is a hashref of
       name/value pairs for all input fields.

       This constraint doesn't honour the not() value.

       This library is free software, you can redistribute it and/or modify it under the same terms as Perl
       itself.

callback
       Arguments: \&sub_ref

       HTML::FormFu::Constraint::CallbackOnce - Code Callback Constraint

       Is a sub-class of, and inherits methods from HTML::FormFu::Constraint

       HTML::FormFu

           $form->constraint({
               type => 'CallbackOnce',
               name => 'foo',
               callback => \&sfoo,
           );

           sub foo {
               my ( $value, $params ) = @_;

               # return true or false
           }

       version 2.07