js菜单栏切换
先来看看需要实现的需求:
这是某购物网站上经常看到的效果
我们把网页的模型抽象出来,下面是我实现的效果图:
源代码仅供大家参考,具体如下:
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1, user-scalable=no"/> <meta http-equiv="X-UA-Compatible" content="ie=edge"> <title>Document</title> <style> * { margin: 0; padding: 0; } li { list-style: none; cursor: pointer; } .header { height: 25px; width: 100%; height: 25px; line-height: 25px; padding-bottom: 1px; } /* 控制其显示和隐藏 */ .show { width: 100%; height: 100%; display: block !important; } /* 其子元素为隐藏状态 */ .wrapper > div{ display: none; } .wrapper { height: 600px; width: 100%; margin: 0 auto; } /* 添加下划线 */ .add2line { color: #3385ff; border-bottom: 1px solid #3385ff; } .header-tab { display: flex; justify-content: center; } .header-tab { background-color: pink; } .box1 { width: 100%; height: 100%; background-color: skyblue; } </style> </head> <body> <nav class="header"> <ul class="header-tab" id="box"> <li class="add2line">更新内容</li> <li>使用说明</li> <li>福利中心</li> <li>上架物品</li> <li>我的宠物</li> </ul> </nav> <main class="wrapper"> <div class="content show"> <div class="box1">页面一</div> </div> <div class="content"> <div class="box1">页面二</div> </div> <div class="content"> <div class="box1">页面三</div> </div> <div class="content"> <div class="box1">页面四</div> </div> <div class="content"> <div class="box1">页面五</div> </div> </main> </body> </html> <script> window.onload = function () { isShow() function isShow () { let liArr = document.querySelectorAll('#box > li') let divArr = document.querySelectorAll('.wrapper .content') for (let i = 0; i < liArr.length; i++) { liArr[i].index = i; // onmouseover事件会在鼠标指针移动到指定的对象上时触发事件发生 // 也可以把其改成鼠标点击事件 onclick liArr[i].onmouseover = function () { for (let j = 0; j < liArr.length; j++) { liArr[j].className = '' divArr[j].className = '' } divArr[this.index].className = 'show' liArr[this.index].className = 'add2line' } } } } </script>