<!DOCTYPE html>
<html lang="zh-cn">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
<title>纯CSS实现内凹导航栏</title>
<link href="https://at.alicdn.com/t/c/font_179247_uja3277echo.css" type="text/css" rel="stylesheet" />
<style type="text/css">
*{
margin: 0;
padding: 0;
box-sizing: border-box;
}
body{
display: flex;
justify-content: center;
align-items: center;
min-height: 100vh;
background-color: #f0f0f0;
}
.nav{
width: 375px;
height: 70px;
padding: 0 15px;
border-radius: 5px;
background-color: #fff;
position: relative;
display: flex;
}
.nav dd{
width: 70px;
height: 70px;
position: relative;
list-style: none;
cursor: pointer;
display: flex;
flex-direction: column;
justify-content: center;
align-items: center;
z-index: 10;
}
.nav dd i{
display: block;
position: relative;
height: 70px;
line-height: 70px;
text-align: center;
font-size: 24px;
transition: all 0.5s;
}
.nav dd span{
position:absolute;
font-size: 12px;
letter-spacing: 2px;
transition: all 0.5s;
opacity: 0;
transform: translateY(20px);
}
.nav dd.on i{
transform: translateY(-35px);
color: #ffffff;
}
.nav dd.on span{
opacity: 1;
transform: translateY(10px);
}
.indicator{
position:absolute;
top: -50%;
width: 70px;
height: 70px;
background-color: #ff6a00;
border-radius: 50%;
transition: all 0.5s;
border: 6px solid #f0f0f0;
}
.indicator::before{
content: '';
position: absolute;
top: 50%;
left: -23px;
width: 21px;
height: 21px;
border-top-right-radius: 20px;
box-shadow: 1px -10px 0 0 #f0f0f0;
}
.indicator::after{
content: '';
position: absolute;
top: 50%;
right: -23px;
width: 21px;
height: 21px;
border-top-left-radius: 20px;
box-shadow: -1px -10px 0 0 #f0f0f0;
}
dd:nth-child(1).on~.indicator{
transform: translateX(calc(70px * 0));
}
dd:nth-child(2).on~.indicator{
transform: translateX(calc(70px * 1));
}
dd:nth-child(3).on~.indicator{
transform: translateX(calc(70px * 2));
}
dd:nth-child(4).on~.indicator{
transform: translateX(calc(70px * 3));
}
dd:nth-child(5).on~.indicator{
transform: translateX(calc(70px * 4));
}
</style>
</head>
<body>
<dl class="nav">
<dd class="on"><i class="iconfont icon-shouye1"></i><span>首页</span></dd>
<dd><i class="iconfont icon-zixun"></i><span>资讯</span></dd>
<dd><i class="iconfont icon-fabu"></i><span>发布</span></dd>
<dd><i class="iconfont icon-xiaoxi"></i><span>消息</span></dd>
<dd><i class="iconfont icon-wode"></i><span>我的</span></dd>
<dt class="indicator"></dt>
</dl>
<script>
const $dd = document.querySelectorAll('.nav dd');
$dd.forEach((item,index)=>{
item.addEventListener('click',function(){
$dd.forEach((_dd,_index)=>{
_dd.classList.remove('on');
this.classList.add('on');
})
})
})
</script>
</body>
</html>
