1   $('.littleTaskBtn li').on('click',function(){ 2             var content=$('.content').html(); 3             $('.layui-timeline-item').css('display','block'); 4             $('#layui-timeline').append(content); 5             var lists = $('.layui-timeline-item'); 6             for (var j = 0; j < lists.length; j++) { 7                 lists.eq(j).j = j; 8                 var list = lists.eq(j).prevAll().length; 9                 $('.layui-timeline-item').eq(j).find('span:eq(0)').text(list + 1);10             }11         })