Uikit lightbox on wordpress block galleries

uk-lightbox.js

(function($) {
  if( $('.wp-block-gallery, .wp-block-image').length ) {
    $(ukLightboxGallery);
  }

  function ukLightboxGallery() {
    $('.wp-block-gallery, .wp-block-image').attr('data-uk-lightbox', true);

    $('figure').each(function() {
      var src = $(this).find('img').attr('src');
      var alt = $(this).find('img').attr('alt');

      if( $(this).find('figcaption').length > 0 ) {
        alt = $(this).find('figcaption').text();
      }

      if( $(this).find('a').length > 0 ) {
        $(this).find('a').attr('data-caption', alt);
      }
      
      else {
        $(this).find('img').wrap('<a href="'+src+'" data-caption="'+alt+'">');
      }
    });
  }
})(jQuery)