Create a special calculation

Hi @tax50

I hope you are doing well today.

By default, this will be not possible as the calculation engine needs to work correctly according to mathematical principles.

I pinged our SLS Team to check if we can do something in this matter. We will post an update here as soon as more information is available.

Kind Regards,
Kris

• This reply was modified 2 years, 11 months ago by Kris - WPMU DEV Support.

Hi again @tax50

• make sure to run full site backup
• follow this guide to implement below code as a mu-plugin on your site https://wpmudev.com/docs/using-wordpress/installing-wordpress-plugins/#installing-mu-plugins

add_action( 'wp_footer', 'wpmudev_fix_calculation_negative_value', 9999 );
function wpmudev_fix_calculation_negative_value() {
	global $post;
    if ( is_a( $post, 'WP_Post' ) && !has_shortcode( $post->post_content, 'forminator_form' ) ) {
        return;
    }
	?>
	<script type="text/javascript">
	jQuery( document ).ready( function($){
		setTimeout(function() {
			$('.forminator-custom-form').trigger('after.load.forminator');
		},100);

		$(document).on('after.load.forminator', function(event, form_id) {
            if ( event.target.id = 'forminator-module-6' ) { //Please change the form ID
                $('#calculation-1 input').on('change', function() { //Please change the field ID
                    var calc_field = $(this);
                    var calc_val = $(this).val();
                    setTimeout(function(){
                        if ( calc_val < 0 ) {
                            calc_field.val(0);
                        }
                    });
                });
            }
        });
    });
    </script>
    <?php
}

Form ID(forminator-module-6) and Calculation field ID(#calculation-1) should be managed in the snippet.

Kind Regards,
Kris