Detailed explanation of the use of Vue card-style click-to-switch image component

<template>
 <!-- 
 *Data-driven card-style display of images (no animation)
 * -->
 <div class="cardBanner">
   <ul>
    <li v-for="(item,index) in cardData" :key="index">
     <a href="#">
      <img :src="item.src" alt="">
      <p>Description of this image {{item.order}}</p>
     </a>
    </li>
    <div class="arrow-left" @click="toggleFun(-1)">&lt;</div>
    <div class="arrow-right" @click="toggleFun(1)">&gt;</div>
   </ul>
 </div>
</template>

<script>
 export default {
  data(){
   return {
    cardData: [
     {id:1,src:require('../assets/images/banner.jpg'),},
     {id:2,src:require('../assets/images/text.jpg')},
     {id:3,src:require('../assets/images/[email protected]')},
     {id:4,src:require('../assets/images/text.jpg')},
     {id:5,src:require('../assets/images/banner.jpg')}
    ]
   }
  },
  methods: {
   //Change data through function to achieve view change toggleFun(p){
    this.cardData = this.cardData.map((item,index,array) => {
     if(index===array.length-1&&p===1){
      item = array[0]
     }
     else if(index===0&&p===-1){
      item = array[array.length-1];
     }else{
      item = array[index+p];
     }
     return item;
    })
   }
  }
 }
</script>

<style scoped>
.cardBanner{
 padding: 10px 30px;
 background-color: #fff;
 border: 1px solid #ccc;
 position: relative;
}
.cardBanner ul{
 display: flex;
 overflow: scroll; /*Set scroll bar*/
}
.cardBanner ul::-webkit-scrollbar{ /*Hide scroll bar*/
 display: none;
}
.cardBanner ul>li{ //High-energy part, flex is not easy to explain width: 31.33333%;
 flex-shrink: 0;
 padding-left: 3%;
 text-align: center;
}
.cardBanner ul>li:first-child{
 padding-left: 0;
}
.cardBanner ul>li a{
 display: block;
 width: 100%;
 height: 100%;
}
.cardBanner ul>li img{
 width: 100%;
 height: 170px;
 border-radius: 5px;
}
.cardBanner ul>li p{
 margin: 0;
}
[class^='arrow']{
 font-size: 30px;
 transform: scaleX(.7);
 color: #ddd;
}
.arrow-left{
 position: absolute;
 left: 5px;
 top: 50%;
 margin-top: -17px;
}
.arrow-right
 position: absolute;
 right: 5px;
 top: 50%;
 margin-top: -17px;
}
</style>