[Solved] Infinite scroll always pull nextSelector url

by 


  var data_next = $(".previous-issue").attr("href");

  var fetchDataNext = function() {
    console.log(data_next);
    return data_next;
  }

  mindful_matter.infinitescroll = function() {
    if ($('.issue-container').length == 0) return false;
    $('.issue-container').infinitescroll({
      navSelector: ".navigation",
      nextSelector: ".previous-issue",
      itemSelector: ".issue",
      extraScrollPx: 250,
      path: function() {
        return fetchDataNext();
      },
      loading: {
        finished: undefined,
        finishedMsg: "",
        img: "data:image/gif;base64,R0lGODlhAQABAHAAACH5BAUAAAAALAAAAAABAAEAAAICRAEAOw==",
        msg: null,
        msgText: "",
        selector: null,
        speed: 'fast',
        start: undefined
      }
    }, function(newElements, data, url) {

      data_next = $(newElements).attr("data-next");

      console.log(data_next);

      if ($("[data-bg-image]") == 0) return false;
      $("[data-bg-image]").each(function() {
        var $this = $(this);
        var img = $this.attr("data-bg-image");
        $this.backstretch(img);
      });
      mindful_matter.masonry();
    });
  }

solved Infinite scroll always pull nextSelector url