html（＆＃39; blabla＆＃39;）jquery方法在生产环境时不起作用

Question

下面是我的代码并不复杂，我的问题在注释中解释。 您正在阅读的此代码在开发环境中完全没问题

function click($button) 
{
     // blablabla
     $('#core').fadeOut(300, function () {
            that = this;
            $('.element').fadeIn(300, function () {
                  $(that).empty();
            });
      });
      $.ajax({
           type: 'GET',
           url: some_variable,
           success: function (data) {
                // ----------------------------
                // ----------------------------
                // ----------------------------
                // ----------------------------
                // the line below works well in the development
                // environment, which means data is injected into $('#core')
                // ----------------------------
                // In production environment, the line below does not work
                // which means that my jquery object $('#core') is empty as if 
                // $('#core').html(data) is skipped and
                // of course I checked that data is not empty
                // ----------------------------
                $('#core').html(data);
                $('.element').fadeOut(300, function () {
                        $('#core').fadeIn(500);
                 });
            }
       });
}

jQuery(function () {
     $(document).on('click', '#button', function () {
         click(this);
     }
});

提前致谢，