$(window).scroll(function(){
  var WindowHeight = $(window).height();

  if($(window).scrollTop() >= $(document).height() - WindowHeight){

    $("-sharploader").html("<img src="../images/loading_v2.svg">");

    var LastDiv = $(".data-display:last");
    var LastId  = $(".data-display:last").attr("id");
    var ValueToPass = "lastid="+LastId;

    $.ajax({
      type: "POST",
      url:"/module/user/order/lazyload.app",
      data: ValueToPass,
      cache: false,
      success: function(data){
        if(data != ""){
          LastDiv.after(data);
        }else{
          $("-sharploader").html("");
        }
      }
    });
  }
  return false;
});

what a strange image. I don"t know where I wrote
. As long as the scroll goes to the bottom, I won"t keep asking for it, but obviously I don"t have any data, so I have to go up scroll a little bit before I can see that there are no more .
otherwise, he will keep showing "" loading stories, and then disappear, then show loading symptoms, disappear again, and repeat them all the time