v-for给img的src动态赋值问题

<el-carousel-item v-for="(item, index) in carouselImgs" :key="index">
        <img  :src="item.url" alt="一张宣传图片" height="400">
          <!-- <img src="../../assets/images/home/banner-04.6b52be3.png" alt=""> --> // 注释
      </el-carousel-item>=