v-bind v-bind<li class="clearfix" v-for="(lists,index) in list" :key="index" v-bind:class="{'left':Id!=lists.id,'right':Id==lists.id ,'notice':lists.id == '' }"></li>遍历 li ,并通过判断Id与循环出来的id 进行判断，以此来绑定样式
