https://www.trakx.ch/wp-content/plugins/pt-olvi-shortcodes/include/zilla-likes.js

1jQuery(function(jQuery) {
2
3  jQuery('.zilla-likes').on('click', function() {
4    var link = jQuery(this);
5    if (link.hasClass('active')) return false;
6
7    var id = jQuery(this).attr('id'),
8        postfix = link.attr('data-postfix');
9
10    jQuery.ajax({
11      type: 'POST',
12      url: zilla_likes.ajaxurl,
13      data: {
14        action: 'zilla-likes', 
15        likes_id: id, 
16        postfix: postfix, 
17      },
18      xhrFields: { 
19        withCredentials: true, 
20      },
21      success: function(data) {
22        link.addClass('active').attr('title','You already like this').find('span').html(data+postfix);
23      },
24    });
25
26    return false;
27  });
28
29  if (jQuery('body.ajax-zilla-likes').length) {
30    jQuery('.zilla-likes').each(function() {
31      var id = jQuery(this).attr('id');
32      jQuery(this).load(zilla_likes.ajaxurl, {
33        action: 'zilla-likes', 
34        post_id: id,
35      });
36    });
37  }
38});