Vue简简单单实现淡入淡出轮播图效果，不依赖任何第三方插件或组件，开箱即用，欢迎C+V。

主页里还有无缝滚动、跑马灯轮播图，地址如下：https://blog.csdn.net/m0_59224033/article/details/126675569?spm=1001.2014.3001.5501

<template>
  <div id="app">
      <div class="SwiperBox" @mouseenter="MouseFun('移入')" @mouseleave="MouseFun('移出')">
          <!-- 图片 -->
          <img :class="['imgCss',ShowImg==index?'ShowCss':'']"
          :src="item.imgUrl" v-for="(item,index) in imgList" :key="index" />
          <!-- 左箭头按钮 -->
          <div class="leftBtn" @click="throttle(PrevFun)">&larr;</div>
          <!-- 右箭头按钮 -->
          <div class="rightBtn" @click="throttle(NextFun)">&rarr;</div>
          <!-- 下方指示点容器 -->
          <div class="instBox">
            <div v-for="(item,index) in imgList.length" :key="index"
            @click="ShowImg=index" :class="['inst',ShowImg==index?'instActv':'']">
            </div>
          </div>
      </div>
  </div>
</template>

<script>
  export default {
    components: {},
    data() {
      return {
        imgList: [
          {imgUrl: "https://img14.360buyimg.com/pop/s590x470_jfs/t1/107362/20/24177/90602/6233decdE5627d944/b7194e538e3c8c7a.jpg"},
          {imgUrl: "https://img12.360buyimg.com/pop/s590x470_jfs/t1/204028/36/25480/101429/62f507a7Ec62b0cd3/db5984ae24ce0212.jpg"},
          {imgUrl: "https://imgcps.jd.com/ling4/100022552927/5Lqs6YCJ5aW96LSn/5L2g5YC85b6X5oul5pyJ/p-5f3a47329785549f6bc7a6e6/075268d0/cr/s/q.jpg"},
          {imgUrl: "https://imgcps.jd.com/ling4/100026667910/5Lqs6YCJ5aW96LSn/5L2g5YC85b6X5oul5pyJ/p-5f3a47329785549f6bc7a6e3/d7b3695b/cr/s/q.jpg"},
          {imgUrl: "https://img30.360buyimg.com/pop/s590x470_jfs/t1/201288/25/23710/64955/62f070fdE95cb4f47/22b916d938a43bb5.jpg"}
        ],
        ShowImg:0,  // 表示当前显示的图片
        flag:true, // 用来节流防止重复点击
        start:null, // 自动执行下一张定时器
      };
    },
    mounted() {
      this.setTimeoFun()
    },
    methods: {
      // 这里定义一个鼠标移入移出事件，鼠标悬停时停止自动轮播，鼠标移出则重新执行自动轮播
      MouseFun(type){// 停止定时器            // 重新执行定时器
        type=='移入'?clearTimeout(this.start):this.setTimeoFun()
      },
      setTimeoFun(){
          this.start = setInterval(()=>{
          this.NextFun()
        },1500)
      },
      // 这里通过额外封装的节流函数触发 PrevFun() 和 NextFun(),以达到防止重复点击的效果
      throttle(fun) {
      	if (this.flag) {
      		this.flag = false;
      		fun(); // 此为模板中传递进来的PrevFun()或NextFun()函数
      	  setTimeout(() => {
      			this.flag = true;
      		}, 1200); // 节流间隔时间
      	}
      },
      // 上一张
      PrevFun(){
        if(this.ShowImg!==0){
           this.ShowImg--
        }else{
           this.ShowImg=this.imgList.length-1
        }
      },
      // 下一张
      NextFun(){
        if(this.ShowImg!==this.imgList.length-1){
           this.ShowImg++
        }else{
           this.ShowImg=0
        }
      },
    }
  };
</script>

<style>
   /* 图片容器样式 */
  .SwiperBox {
    position: relative;
    width: 500px;
    height: 300px;
    border: 1px solid #ccc;
    box-sizing: border-box;
    cursor: pointer;
  }
  /* 图片默认样式 */
  .imgCss {
    position: absolute;
    left: 0px;
    top: 0px;
    width: 500px;
    height: 300px;
    opacity: 0;
    transition: 0.8s;  /* 淡入淡出过渡时间 */
  }
  /* 图片选中样式(继承上方默认样式) */
  .ShowCss {
    opacity: 1;
  }
   /* 两个按钮共有的样式,也可直接使用箭头图片替代 */
  .leftBtn,
  .rightBtn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 30px;
    height: 30px;
    display: flex;
    justify-content: center;
    align-items: center;
    background: rgba(109, 109, 109, 0.445);
    color: #fff;
    border-radius: 50%;
    cursor: pointer;
    font-size: 12px;
    font-weight: 500;
  }
  .leftBtn {
    left: 10px;
  }
  .rightBtn {
    right: 10px;
  }
  /* 下方指示器盒子 */
  .instBox{
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    bottom: 10px;
    display: flex;
  }
   /* 小圆点 */
  .inst{
    width: 10px;
    height: 10px;
    border: 1px solid #ccc;
    margin-right: 8px;
    background: #fff;
    border-radius: 50%;
    cursor: pointer;
  }
  .inst:last-child{
    margin-right: 0px;
  }
  .instActv{
    border: 1px solid #ff0000;
    background: #ff0000;
  }
  #app{
    width: 100%;
    padding: 120px;
    display: flex;
    justify-content: center;
  }
</style>