核心js代码
$("#list li").on({
mouseover:function(){
$(this).children(".task-side").css("left","0");
$(this).children(".task-main").css("margin-left","27px");
},
mouseout:function(){
$(this).children(".task-side").css("left","-27px");
$(this).children(".task-main").css("margin-left","0");
}
})