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预览效果
核心样式代码
若页面中运用了点击锚点以跳转到对应的位置，仅需添加上文提及的样式，即可实现平滑滚动至特定位置。通过这种方式，无需借助 JavaScript 便可达成页面置顶的效果，实用性极强。
源码(直接复制运行看效果)
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title></title>
<style>
html,
body {
/* 核心属性 让页面平滑滚动*/
scroll-behavior: smooth;
}
#one,
#two,
#three {
width: 80%;
height: 700px;
background-color: #eee;
margin: 50px auto;
font-size: 50px;
text-align: center;
line-height: 700px;
}
/* 定位置顶按钮 */
.backToTop {
position: fixed;
right: 20px;
bottom: 100px;
background-color: red;
text-align: center;
line-height: 60px;
width: 60px;
border-radius: 5px;
box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
transition: background-color 0.3s ease;
}
.backToTop:hover {
background-color: darkred;
}
.navigation {
position: fixed;
right: 20px;
bottom: 200px;
}
a {
display: block;
text-align: center;
line-height: 60px;
width: 60px;
color: aliceblue;
text-decoration: none;
margin-bottom: 10px;
background-color: skyblue;
border-radius: 5px;
box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
transition: background-color 0.3s ease;
}
a:hover {
background-color: dodgerblue;
}
</style>
</head>
<body>
<section id="one">模块1</section>
<section id="two">模块2</section>
<section id="three">模块3</section>
<div class="navigation">
<a href="#one">01</a>
<a href="#two">02</a>
<a href="#three">03</a>
</div>
<a href="#one" class="backToTop">
置顶
</a>
</body>
</html>