скрипт призрачного захода

Код:
<script type="text/javascript">
//var achieve_sum = 20; 
$(function(){
if (window.location.pathname === '/') {
  const profilesIds = {'Madison': 25, 'game master': 9, 'Blanche Dubois': 11, 'Astoria St.Clair': 7, 'Noa Seymour': 21, 'Tyson Young': 6, 'Derek Bell': 22};
  const profiles = Object.keys(profilesIds);
  let addToOnline = [];
  let onlineHTML = $('.users_24h div span').html();
  let onlineArr = onlineHTML.split(', ');
  onlineArr = onlineArr.map((str) => {
    let start = str.indexOf('>');
    let finish = str.lastIndexOf('<');
    if (start !== -1 && finish !== -1) {
      return str.substring(start + 1, finish);
    }
    else {
      return ''
    }
  });
  profiles.forEach((name) => {
    if (onlineArr.indexOf(name) === - 1) {
      addToOnline.push(name);
    }
  });
  let yesterday = (d => new Date(d.setDate(d.getDate() - 1)) )(new Date).toISOString();
  yesterday = yesterday.substring(yesterday.indexOf('T') + 1, yesterday.indexOf('.'));
  $('.users_24h div span').append(addToOnline.reduce((sum, str) => `${sum}, <a class="group5" title="Вчера ${yesterday}" href="/profile.php?id=${profilesIds[str]}" rel="nofollow">${str}</a>`, ''));
  $('.users_24h div strong:first').html(parseInt($('.users_24h div strong:first').html()) + addToOnline.length);
}
});
</script>