vue.js怎么點擊li取得索引添加class名字樣式

<li v-for="(children,index) in item.list" :class="index==1?'one':'two'"></li>

index==1這一塊對索引進行判斷如果滿足條件添加one樣式，不滿足則是two，判斷語句和樣式換成自己想要的效果

<li v-for="(children,index) in item.list" :key="index" :class="{one: index == 1,two: index != 1}"></li>

<li v-for="(children,i) in item.list" @click='getIndex($event)' :index="i"></li>

getIndex(e){
    let index  = e.target.getAttribute('index');//點擊的li的索引
    e.target.className = 'selected';//設置該li的class
}