Menu bar in Angualr JS

We are using Angular’s directives to set and read the active variable

<style>
*{
margin:0;
padding:0;
}

body{
font:15px/1.3 'Open Sans', sans-serif;
color: #5e5b64;
text-align:center;
}

a, a:visited {
outline:none;
color:#389dc1;
}

a:hover{
text-decoration:none;
}

section, footer, header, aside, nav{
display: block;
}

/*-------------------------
The menu
--------------------------*/

nav{
display:inline-block;
margin:60px auto 45px;
background-color:#5597b4;
box-shadow:0 1px 1px #ccc;
border-radius:2px;
}

nav a{
display:inline-block;
padding: 18px 30px;
color:#fff !important;
font-weight:bold;
font-size:16px;
text-decoration:none !important;
line-height:1;
text-transform: uppercase;
background-color:transparent;

-webkit-transition:background-color 0.25s;
-moz-transition:background-color 0.25s;
transition:background-color 0.25s;
}

nav a:first-child{
border-radius:2px 0 0 2px;
}

nav a:last-child{
border-radius:0 2px 2px 0;
}

nav.home .home,
nav.projects .projects,
nav.services .services,
nav.contact .contact{
background-color:#e35885;
}

p{
font-size:22px;
font-weight:bold;
color:#7d9098;
}

p b{
color:#ffffff;
display:inline-block;
padding:5px 10px;
background-color:#c4d7e0;
border-radius:2px;
text-transform:uppercase;
font-size:18px;
}
</style>
<script src="http://ajax.googleapis.com/ajax/libs/angularjs/1.4.8/angular.min.js"></script>

HTML

 It replaces it with the contents of the variable.

<div id="main" ng-app>


<nav class="{{active}}" ng-click="$event.preventDefault()">



<a href="#" class="home" ng-click="active='home'">Home</a>
<a href="#" class="projects" ng-click="active='Hardware'">Hardware</a>
<a href="#" class="services" ng-click="active='Software'">Software</a>
<a href="#" class="contact" ng-click="active='contact'">Contact</a>
</nav>



<p ng-hide="active">Please click a menu item</p>
<p ng-show="active">You chose <b>{{active}}</b></p>
</div>