Setup
<nav>
<ul>
<li><a href="#1">First</a></li>
<li><a href="#2">Second</a></li>
<li><a href="#3">Third</a></li>
<li><a href="#4">Fourth</a></li>
<li><a href="#5">Fifth</a></li>
</ul>
</nav>
<div class="sections">
<section id="1"><h1>First</h1></section>
<section id="2"><h1>Second</h1></section>
<section id="3"><h1>Third</h1></section>
<section id="4"><h1>Fourth</h1></section>
<section id="5"><h1>Fifth</h1></section>
</div>
Change Active State on Scroll
var sections = $('section')
, nav = $('nav')
, nav_height = nav.outerHeight();
$(window).on('scroll', function () {
var cur_pos = $(this).scrollTop();
sections.each(function() {
var top = $(this).offset().top - nav_height,
bottom = top + $(this).outerHeight();
if (cur_pos >= top && cur_pos <= bottom) {
nav.find('a').removeClass('active');
sections.removeClass('active');
$(this).addClass('active');
nav.find('a[href="#'+$(this).attr('id')+'"]').addClass('active');
}
});
});
Change Active State on Click
nav.find('a').on('click', function () {
var $el = $(this)
, id = $el.attr('href');
$('html, body').animate({
scrollTop: $(id).offset().top - nav_height
}, 500);
return false;
});
==========
* {
margin: 0;
padding: 0;
box-sizing: border-box;
}
body {
font-family: 'Open Sans', sans-serif;
}
nav {
width: 100%;
height: 60px;
position: fixed;
top: 0;
background: #1ABC9C;
}
nav ul {
padding: 20px;
margin: 0 auto;
list-style: none;
text-align: center;
}
nav ul li {
display: inline-block;
margin: 0 10px;
}
nav ul li a {
padding: 10px 0;
color: #fff;
font-size: 1rem;
text-decoration: none;
font-weight: bold;
transition: all 0.2s ease;
}
nav ul li a:hover {
color: #34495E;
}
a.active {
border-bottom: 2px solid #ecf0f1;
}
h1 {
font-size: 5rem;
color: #34495E;
}
section {
width: 100%;
padding: 50px;
background: #fff;
border-bottom: 1px solid #ccc;
height: 500px;
text-align: center;
}
section:nth-child(even) {
background: #ecf0f1;
}
section:nth-child(odd) {
background: #bdc3c7;
}
.sections section:first-child {
margin-top: 60px;
}
section.active {}
