Code-Snippets-Functions/Execute a function on a child site/WooCommerce/hide-show-checkout-field-if-field-is-empty.txt

add_action( 'wp_footer', 'wc_conditionally_hide_show_checkout_field', 9999 );
 
function wc_conditionally_hide_show_checkout_field() {
   if ( ! is_checkout() ) return;
   ?>
      <script type="text/javascript">
         jQuery('#billing_company').keyup(function() {
            if (jQuery(this).val().length == 0) {
               jQuery('#billing_phone_test_field').hide();
            } else {
               jQuery('#billing_phone_test_field').show();
            }
         }).keyup();
      </script>
   <?php
}