vue动态改变样式

<i class="el-icon-arrow-left" :style="{'color': deadColorArr[index]}"  @click="reduceDeadDate(index)"></i>

<li class="box" v-for="(list,index) in dataList" :key="index" :class="{'bor':clicked==index}" @click="changeTab(index)">{{list}}</li>