jquery后加Dom绑定事件

$('#musicCategoryListContainer').on('click', '.musicCategoryItem', function () {
                    $(this).siblings().removeClass("musicCategoryChecked");
                    $(this).addClass("musicCategoryChecked");
                    //alert($(($(this).find(".data"))[0]).attr("ItemId"));
                });

<ul class="site-doc-icon site-doc-anim margin15" >
            <!--<li class="musicCategoryChecked musicCategoryItem">
                <div class="layui-anim" data-anim="layui-anim-scaleSpring">弹簧式放大</div>
                <div class="code">layui-anim-scaleSpring</div>
            </li>-->
        </ul>