BuddyPress.org

I think that I want to change only activities about like “Smith and Jon are now friends” to background: pink;

But in the following code error that “targetTxt is undefined”.

(function($){
  var url = location.href	
  var urlSplit_activity = url.split('/')[5];	
  if (urlSplit_activity == 'activity'){		
    var observer = new MutationObserver(function (MutationRecords, MutationObserver) {
      $('.activity-header a:nth-child(2)').each(function() {
        var targetTxt = this.nextSibling.data; //error
        if (targetTxt.indexOf('are now friends') >= 0) {
          $(this).closest('li').css('background','pink');
        }
      });	
    });
    observer.observe($('#activity-stream').get(0), {
      childList: true,
      attributes: true,
      subtree: true
    });		
  }
})(jQuery);

Would you mind teaching me how to do that?

Thanks.