tab栏切换

news2024/12/30 1:50:52

效果：
在这里插入图片描述

当鼠标通过上边tab栏时，对应的元素变亮并切换到相应的菜单

<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8" />
  <meta http-equiv="X-UA-Compatible" content="IE=edge" />
  <meta name="viewport" content="width=device-width, initial-scale=1.0" />
  <title>tab栏切换</title>
  <style>
    * {
      margin: 0;
      padding: 0;
    }

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

    .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;
    }
  </style>
</head>

<body>
  <div class="tab">
    <div class="tab-nav">
      <h3>每日特价</h3>
      <ul>
        <li><a class="active" href="javascript:;">精选</a></li>
        <li><a href="javascript:;">美食</a></li>
        <li><a href="javascript:;">百货</a></li>
        <li><a href="javascript:;">个护</a></li>
        <li><a href="javascript:;">预告</a></li>
      </ul>
    </div>
    <div class="tab-content">
      <div class="item active"><img src="./images/tab00.png" alt="" /></div>
      <div class="item"><img src="./images/tab01.png" alt="" /></div>
      <div class="item"><img src="./images/tab02.png" alt="" /></div>
      <div class="item"><img src="./images/tab03.png" alt="" /></div>
      <div class="item"><img src="./images/tab04.png" alt="" /></div>
    </div>
  </div>
  <script>
    // 1. a模块制作  要给5个链接绑定鼠标经过事件
    // 1.1 获取a元素
    const as=document.querySelectorAll('.tab-nav a')

    for(let i=0;i<as.length;i++){
      // 要给5个链接绑定鼠标经过事件
      as[i].addEventListener('mouseenter',function(){
        // 排他思想
        // 干掉别人 移除类active
        document.querySelector('.tab-nav .active').classList.remove('active')
        // 我登基  我添加类active
        this.classList.add('active')

        // 下面5个大盒子一一对应 .item
        // 干掉别人 移除类active
        document.querySelector('.tab-content .active').classList.remove('active')
        // 对应序号的那个item显示  添加类active
        document.querySelector(`.tab-content .item:nth-child(${i+1})`).classList.add('active')
      })
    }
  </script>

</body>

</html>