With the help of Bootstrap we can create a Scrollspy function.The Scrollspy plugin is used to automatically update links in a navigation list based on scroll position. According to the below example, i am using data-spy=scroll it is used to scolling element, after then I have used data-target attribute. The Target data attribute is used to make id or class name of the navigation bar.
<!DOCTYPE html>
<html>
<head>
<title>Evon-tec</title>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="http://maxcdn.bootstrapcdn.com/bootstrap/3.3.5/css/bootstrap.min.css">
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.3/jquery.min.js"></script>
<script src="http://maxcdn.bootstrapcdn.com/bootstrap/3.3.5/js/bootstrap.min.js"></script>
<style>
.test {
position: relative;
top: 50px;
height: 240px;
overflow: auto;
font-size: 28px;
}
#section1 {color: #fff; background-color: #1E88E5;}
#section2 {color: #fff; background-color: #673ab7;}
#section3 {color: #fff; background-color: #ff9800;}
#section41 {color: #fff; background-color: #00bcd4;}
#section42 {color: #fff; background-color: #009688;}
</style>
</head>
<body>
<nav class="navbar navbar-inverse navbar-fixed-top">
<div class="container-fluid">
<div class="navbar-header">
<button type="button" class="navbar-toggle" data-toggle="collapse" data-target="#myNavbar">
<span class="icon-bar"></span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
</button>
<a class="navbar-brand" href="#">IT & network Company </a>
</div>
<div>
<div class="collapse navbar-collapse" id="myNavbar">
<ul class="nav navbar-nav">
<li><a href="#section1">Box-1</a></li>
<li><a href="#section2">Box-2</a></li>
<li><a href="#section3">Box-3</a></li>
<li class="dropdown"><a class="dropdown-toggle" data-toggle="dropdown" href="#">Section 4 <span class="caret"></span></a>
<ul class="dropdown-menu">
<li><a href="#section41">Text 4-1</a></li>
<li><a href="#section42">Text 4-2</a></li>
</ul>
</li>
</ul>
</div>
</div>
</div>
</nav>
<div data-spy="scroll" data-target=".navbar" data-offset="12" class="test">
<div id="section1">
<div class="container-fluid">
<h1>Evon</h1>
<p>We are a team of 200+ technology evangelists, simply in love with the town we are headquartered in. </p>
<p>Try to scroll this section and look at the navigation bar while scrolling!</p>
</div>
</div>
<div id="section2">
<div class="container-fluid">
<h1>Ericsson-network</h1>
<p>Like most of our kind, we are a custom software development company. </p>
<p>The company's offerings comprise services, software and infrastructure</p>
</div>
</div>
<div id="section3">
<div class="container-fluid">
<h1>Ericsson-pvt</h1>
<p>Ericsson is a Swedish multinational provider of communication technology and services. in information and communications technology </p>
<p>We believe that the Project Requirement Document is just a small part of contribution from your side on the road to success</p>
</div>
</div>
<div id="section41">
<div class="container-fluid">
<h1>Microsoft</h1>
<p>We need you there at every step of project execution. We require long meetings with you. </p>
<p>At Microsoft our mission and values are to help people and businesses </p>
</div>
</div>
<div id="section42">
<div class="container-fluid">
<h1>Apple</h1>
<p>Try to scroll this section and look at the navigation bar while scrolling!</p>
<p>At Microsoft our mission and values are to help people and businesses throughout</p>
</div>
</div>
</div>
</body>
</html>
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