vue v-for的列表,点击某个li添加样式

1 <template>
 2  <div>
 3   <ul class="resultList" v-for="(item,index) in standardData">
 4    <li @click="setCenter(index)" :class="{selectedColor:selectIndex === index}" ></li>
 5   </ul>
 6 </div>
 7 </template>
 8 <script>
 9 export default {
10     data(){
11       return{
12         standardData:[],
13         selectIndex:null  //搜索结果,被选中的li index
14       }
15     },
16  methods:{ 
17    setCenter(index) {
18       this.selectIndex = index;
19    }
20 }
21 </script>
22 <style lang="scss">
23    .selectedColor{
24         color:#4b7dff;
25         background-color: #f6f6f6;
26    }
27 </style>