vue.js实现点击后动态添加class及删除同级class的实现代码

<div class="weui-mask" id="guige">    <div class="guigeBox">     <p class="guigeTitle">{{guigeName}}</p>     <p class="guigeP guigeP01">规格</p>     <div class="indexGuiGe">      <span v-for="value,index in guigeList" v-on:click="guige(index)" v-bind:class="{on:index==guigeSpan}">{{value.guige_name}}</span>     </div>     <p class="guigeP">口味</p>     <div class="indexKouwie">      <span v-for="value,index in kouweiList" v-on:click="kouwei(index)" v-bind:class="{on:index==kouweiSpan}">{{value.guige_name}}</span>     </div>    </div>   </div>

var guige=new Vue({    el: '#guige',    data:{     guigeSpan:"-1", //控制点亮状态 -1为默认不点亮     kouweiSpan:"-1", //控制点亮状态     },   methods:{     guige:function(index){ //当点击时候点亮，同级的span标签删除Class      this.guigeSpan = index;     },     kouwei:function(index){      this.kouweiSpan = index;     },    }   })