1.CSS样式

  <style>
    * {
      margin: 0;
      padding: 0;
    }

    .tab {
      width: 590px;
      height: 340px;
      margin: 20px;
      border: 1px solid #e4e4e4;
      margin-left: 300px;
    }

    .tab-nav {
      width: 100%;
      height: 60px;
      line-height: 60px;
      display: flex;
      justify-content: space-between;
    }

    .tab-nav h3 {
      font-size: 24px;
      font-weight: normal;
      margin-left: 20px;
    }

    .tab-nav ul {
      list-style: none;
      display: flex;
      justify-content: flex-end;
    }

    .tab-nav ul li {
      margin: 0 20px;
      font-size: 14px;
    }

    .tab-nav ul li a {
      text-decoration: none;
      border-bottom: 2px solid transparent;
      color: #333;
    }

    .tab-nav ul li a.active {
      border-color: #e1251b;
      color: #e1251b;
    }

    .tab-content {
      padding: 0 16px;
    }

    .tab-content .item {
      display: none;
    }

    .tab-content .item.active {
      display: block;
    }

    .tab-content img{
      width: 100%;
      height: 580px;
      /* width: 100%; */
      /* height: 100%; */
    }


  </style>

2.Html+JavaScript

  <div class="tab">
    <div class="tab-nav">
      <h3>惜君</h3>
      <ul>
        <li><a class="active" href="javascript:;">精选1</a></li>
        <li><a href="javascript:;">精选2</a></li>
        <li><a href="javascript:;">精选3</a></li>
        <li><a href="javascript:;">精选4</a></li>
        <li><a href="javascript:;">精选5</a></li>
      </ul>
    </div>
    <div class="tab-content">
      <div class="item active"><img src="./images/6.png" alt="" /></div>
      <div class="item"><img src="./images/11.webp" alt="" /></div>
      <div class="item"><img src="./images/3.png" alt="" /></div>
      <div class="item"><img src="./images/4.jpg" alt="" /></div>
      <div class="item"><img src="./images/10.jpg" alt="" /></div>
    </div>


    <script>
      
      //1.a模块制作  要给5个链表绑定鼠标经过事件
      //1.1 获取a元素

      const as = document.querySelectorAll('.tab-nav a')
      // console.log(as)
      for(let i = 0;i<as.length ;i++){
        // console.log(as[i]);
        as[i].addEventListener('mouseenter',function(){
          console.log('鼠标经过');

          //移除active
          document.querySelector('.tab-nav .active').classList.remove('active')

          //添加类 active
          this.classList.add('active')

          //下面5个大盒子 一一对应 .item
          //移除
          document.querySelector('.tab-content .active').classList.remove('active')

          //对应序号的那个item 显示添加 active类
          document.querySelector(`.tab-content .item:nth-child(${i+1})`).classList.add('active')


        })
      }
    </script>





  </div>