变异观测器产生无穷环

我正在编写一个函数,使用带有jquery的变异观察者来注册对dom的更改,特别是在添加新节点时,这样我就可以更改其内容:

$("SELeCTOR GOOD" ).click(function(){
  var targetNode = $(this).find('.content').get(0);
  var config = { attributes: true, childList: true, subtree: true, attributeOldValue: true };

  // Callback function to execute when mutations are observed
  var callback = function(mutationsList) {
      for(var mutation of mutationsList) {
          if (mutation.type == 'childList') {
              var courses = $(targetNode).find('.courses').get(0);
              $(courses).find('.coursebox.clearfix').each(function( index,item ) {
                var attacherURL = $(item).find('.coursename a').attr('href');
                var moreInfoURL = '<a class="btn btn-outline-primary pull-right" href="'+attacherURL+'">More info</a>';

                var oldHTML = $(item).find('div.moreinfo').html();
                var newHTML = moreInfoURL + oldHTML;
                //this following line is supposed to replace the html, but it creates an infinite loop
                $(item).find('div.moreinfo').html(newHTML);
                //end
              });
          }
          else if (mutation.type == 'attributes') {
              console.log('The ' + mutation.attributeName + ' attribute was modified.');
          }
      }
  };

我也尝试过append/prepend,但是所有的东西都创建了相同的无限循环。像往常一样,我们非常感谢您的帮助。

当做