vue element组件 实现轮播图

<template>
  <el-carousel :interval="2000" type="card" height="4000px">
    <el-carousel-item v-for="item in banners" :key="item">
      <img :src="item.url" alt=""/>
    </el-carousel-item>
  </el-carousel>
</template>

const banners= [
  {url: require("")},
  {url: require("")},
  {url: require("")},
  {url: require("")},
  {url: require("")},
  {url: require("")},
]