jQuery导航滚动到一定高底后吸顶,锚点定位自动跟随

使用方法：

引入CSS

.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;}

引入jQuery库文件、JS文件

<script type="text/javascript" src="js/jquery-1.js"></script>
<script src='js/nav.js'></script>

初始化、参数配置

//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');
});

HTML结构

<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>