<!DOCTYPE html>
<html>
<head>
<title>Bootstrap实例</title>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="https://apps.bdimg.com/libs/bootstrap/3.3.0/css/bootstrap.min.css">
<script src="https://libs.baidu.com/jquery/2.1.4/jquery.min.js"></script>
<script src="https://apps.bdimg.com/libs/bootstrap/3.3.0/js/bootstrap.min.js"></script>
<style>
body { position: relative;
}
.affix { top:0;
width: 100%;
z-index: 9999 !important;
}
.navbar { margin-bottom: 0px;
}
.affix ~ .container-fluid { position: relative;
top: 50px;
}
#section1 {padding-top:50px;height:500px;color: #fff; background-color: #1E88E5;} #section2 {padding-top:50px;height:500px;color: #fff; background-color: #673ab7;} #section3 {padding-top:50px;height:500px;color: #fff; background-color: #ff9800;} #section41 {padding-top:50px;height:500px;color: #fff; background-color: #00bcd4;} #section42 {padding-top:50px;height:500px;color: #fff; background-color: #009688;} </style>
</head>
<body data-spy="scroll" data-target=".navbar" data-offset="50">
<div class="container-fluid" style="background-color:#F44336;color:#fff;height:200px;">
<h1>Scrollspy & Affix实例</h1>
<h3>附加导航条</h3>
<p>滚动页面查看使用 data-spy="affix" 与 data-spy="scrollspy" 后导航条的行为</p>
<p>滚动指定数量的像素后，导航栏会附加到页面顶部，导航栏中的链接会根据滚动位置自动更新。</p>
</div>