Vue 动态绑定多个class 带上三元运算或其他条件

例子

设置第一条数据的样式为one

<li v-for="(item,index) in items" :key="index">
    <span :class="index==0?'one':''">{{index+1}}</span>
</li>

设置样式并判断

<li v-for="(item,index) in items" :key="index">
    <span :class="[index==0?'one':'','select-active':items.istrue]">{{index+1}}</span>
</li>

实现

<li v-for="(item,index) in items" :key="index">
    <span :class="[index==0?'one':'',index==1?'two':'',index==2?'three':'']">{{index+1}}</span>
</li>