code: function(mescroll, downwarp) {
  				//初始化完毕的回调,可缓存dom
  				mescroll.downProgressDom = downwarp.getElementsByClassName("downwarp-progress")[0];
  				mescroll.downLoadingDom = downwarp.getElementsByClassName("downwarp-loading")[0];
  			}
docs: 布局内容