Add Inline Field Error Notifications WooCommerce Checkout

**
Add Inline Field Error Notifications  WooCommerce Checkout
 */
 
add_filter( 'woocommerce_form_field', 'bbloomer_checkout_fields_in_label_error', 10, 4 );
 
function bbloomer_checkout_fields_in_label_error( $field, $key, $args, $value ) {
   if ( strpos( $field, '</label>' ) !== false && $args['required'] ) {
      $error = '<span class="error" style="display:none">';
      $error .= sprintf( __( '%s is a required field.', 'woocommerce' ), $args['label'] );
      $error .= '</span>';
      $field = substr_replace( $field, $error, strpos( $field, '</label>' ), 0);
   }
   return $field;
}