New Price - Upload Qty * Qty (WooCommerce)

add_action( 'wp_footer', function(){
    ?>
        <script type="text/javascript">
            jQuery(document).ready(function($) {
                if ( dnd_wc_uploader.update_qty_pdf && dnd_wc_uploader.show_qty ) {

                    // Add minimum on upload quantity to 1.
                    document.addEventListener('dndmfu_on_success', function(event){
                        $('.dnd-upload-qty').attr( 'min', 1 );
                    });

                    // After deleting the item, reset cart quantity.
                    document.addEventListener('dndmfu_after_deleted', function(event){
                        $('input.qty').val(1);
                    });

                    // Prevent user to change cart quantity.
                    $('input.qty').attr('readonly', true);

                    // Update Quantity - Multiply (upload_quantity * total_pdf_pages).
                    $(document).on('change', '.dnd-upload-qty', function() {
                        const indexName = $(this).attr('name').match(/\[(.*?)\]/)[1]
                        const pdfIndex  = $('[pdf-index="'+ indexName +'"]');
                        if ( $('input.qty').val() > 1 && pdfIndex.length > 0 && $(this).val() > 0 ) {
                            $('input.qty').val( $(this).val() * parseInt( pdfIndex.attr('data-pages') ) );
                        } else {
                            $('input.qty').val( parseInt( pdfIndex.attr('data-pages') ) );
                        }
                    });

                }
            });
        </script>
    <?php
});