[WooCommerce Ninja Forms Product Add-ons] Hide price add-ons equal to zero

wc-ninja-forms-product-add-ons-hide-zero-price-add-ons.php

/*
 * Snippet to hide price add-ons equal to zero.
 * Code goes in the functions.php file in your theme.
*/

add_filter( 'wc_nf_addons_format_cart_item_price' , 'wc_ninja_forms_hide_zero_price' );

function wc_ninja_forms_hide_zero_price( $value ) {

    $hide_price = ' (' . wc_price( '0.00' ) . ')';

    if ( $value == $hide_price ) {
        return '';
    } else {
        return $value;
    }

}