(function ($) {  var Carousel = function (obj) {    this.poster = obj;    // 默认配置    this.setting = {      width: 1000,      height: 270,      posterWidth: 640,      posterHeight: 270,      scale: 0.9,      verticalAlign: "middle",      speed: 500,    };        console.log(this.getSetting());  };  Carousel.prototype = {    //   获取人工配置参数    getSetting: function () {      var setting = this.poster.attr("data-setting");      if (setting && setting != "") {        return $.parseJSON(setting);      }else{          return {};      };    }  };  Carousel.init = function (posters) {    var _this_ = this;    posters.each(function () {      new _this_($(this));    });  };  window["Carousel"] = Carousel;})(jQuery);

在getsetting方法中return this.setting是可以的，但只要改成return $.parseJSON(setting)就报错