本文实例给大家分享了一个用原生JS实现的比较实用的网页导航条特效，当页面滚动时，导航条会发生变化，效果如下：
以下是代码实现，欢迎大家复制粘贴和收藏。
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>原生JS实现网页导航条特效</title>
<style>
* {
margin: 0;
padding: 0;
box-sizing: border-box;
word-wrap: break-word;
font-family: '微软雅黑', sans-serif;
}
body {
background: #000;
min-height: 200vh;
}
header {
position: fixed;
top: 0;
left: 0;
width: 100%;
display: flex;
align-items: center;
justify-content: space-between;
transition: 0.6s;
padding: 40px 100px;
z-index: 2;
}
header.sticky {
padding: 5px 100px;
background: #fff;
}
header .logo {
position: relative;
font-weight: 700;
color: #fff;
text-decoration: none;
font-size: 2em;
text-transform: uppercase;
letter-spacing: 2px;
transition: 0;
}
header ul {
position: relative;
display: flex;
justify-content: center;
align-items: center;
}
header ul li {
position: relative;
list-style: none;
}
header ul li a {
position: relative;
margin: 0 15px;
text-decoration: none;
color: #fff;
letter-spacing: 2px;
font-weight: 500px;
transition: 0.5s;
}
.banner {
position: relative;
width: 100%;
height: 100vh;
background: url(bg.jpg);
background-size: cover;
}
header.sticky .logo,
header.sticky ul li a {
color: #000;
}
</style>
</head>
<body>
<header>
<a href="#" class="logo">Logo</a>
<ul>
<li><a href="#" >首页</a></li>
<li><a href="#" >关于</a></li>
<li><a href="#" >服务</a></li>
<li><a href="#" >作品</a></li>
<li><a href="#" >联系</a></li>
</ul>
</header>
<section class="banner"></section>
<script>
window.addEventListener('scroll', () => {
let header = document.querySelector('header')
// 重要属性
header.classList.toggle('sticky', window.scrollY > 0)
})
</script>
</body>
</html>
以下是代码中所引用的图片 bg.jpg
