关于使用jquery导航跟随置顶的插件，在之前已经分享过几个了：
2、jQuery 智能判断跟随页面滚动的导航、菜单、广告，下拉后跟随置顶特效代码
3、jQuery - 多个菜单导航滚动跟随，全部积累固定在顶端
而今天要分享的，是带锚点定位自动跟随！
这是一个插件，所以JS：nav.zip
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>导航滚动到一定高底后吸顶，锚点定位自动跟随</title>
<style type="text/css">
*{margin: 0; padding: 0;}
.topbox{ height: 500px; background-color: #313131; }
.section-content{ border-bottom: 5px solid #0000FF; min-height: 500px; background: #eee; width: 1200px; margin: auto; line-height: 500px; text-align: center; }
.nav-height{ position:relative; height: 50px;}
.nav-wrap { width: 100%;height: 50px;background: #fff;}
.nav-wrap.navFix{position: fixed;top: 0;left: 0; box-shadow: 0 0 5px rgba(0,0,0, 0.2);border-bottom:1px solid #e3e3e3\9; z-index: 99999;}
.nav-wrap ul {padding: 0;margin: 0 auto; width: 1200px; display: block; border-bottom: 2px solid #eee;}
.nav-wrap.navFix ul{ border-bottom: 0;}
.nav-wrap li { display: inline-block; text-align: left;height: 50px; line-height: 50px; float: left;}
.nav-wrap li a {display: block;padding: 0 20px;font-size:20px; color: #333; text-decoration: none;}
.nav-wrap li a:hover{color: #4680d1;}
.nav-wrap li a.active {border-bottom:2px solid #4680d1;color: #4680d1;}
.nav-mobile {display: none;font-weight: bold;width: 100%;}
.click-me {width: 150px;height: 30px; background: #4680d1;color: white; text-align: center;line-height: 30px;}
.click-me a {display: block;color: white;}
</style>
<script type="text/javascript" src="http://apps.bdimg.com/libs/jquery/2.1.4/jquery.min.js"></script>
<script src='nav.js'></script><!----------文章中提供了JS，请下载使用------------>
</head>
<body>
<div class="topbox"></div>
<div class="nav-height" id="navHeight">
<nav class="nav-wrap" id="nav-wrap">
<div class="nav-mobile">Click</div>
<ul class="clearfix">
<li><a class="active" href="#section1">nav1</a></li>
<li><a class="" href="#section2">nav2</a></li>
<li><a class="" href="#section3">nav3</a></li>
<li><a class="" href="#section4">nav4</a></li>
</ul>
</nav>
</div>
<div id="section1" class="section-content">
1
</div>
<div id="section2" class="section-content">
2
</div>
<div id="section3" class="section-content">
3
</div>
<div id="section4" class="section-content">
4
</div>
<div style="height: 1000px;background: #f5f5f5;">footer</div>
<!--内容信息导航吸顶及锚点引入JS-->
<script>
//内容信息导航吸顶
$(document).ready(function(){
var navHeight= $("#navHeight").offset().top;
var navFix=$("#nav-wrap");
$(window).scroll(function(){
if($(this).scrollTop()>navHeight){
navFix.addClass("navFix");
}
else{
navFix.removeClass("navFix");
}
})
})
//内容信息导航锚点
$('.nav-wrap').navScroll({
mobileDropdown: true,
mobileBreakpoint: 768,
scrollSpy: true
});
$('.click-me').navScroll({
navHeight: 0
});
$('.nav-wrap').on('click', '.nav-mobile', function (e) {
e.preventDefault();
$('.nav-wrap ul').slideToggle('fast');
});
</script>
</body>
</html>