HTML::Widget::Filter::Callback - Lower Case Filter

       Lyo Kato, "lyo.kato@gmail.com"

       Argument: \&callback

       Define the callback to be used for filter.

       "cb" is an alias for "callback".

   filter

       Callback Filter.

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

perl v5.36.0                                       2023-08-10                HTML::Widget::Filter::Callback(3pm)

       HTML::Widget::Filter::Callback - Lower Case Filter

           my $f = $widget->filter( 'Callback', 'foo' )->callback(sub {
               my $value=shift;
               $value =~ s/before/after/g;
               return $value;
           });