Following is the code to add a search box inside a responsive navigation menu −
Example
<!DOCTYPE html>
<html lang="en" >
<head>
<meta charset="UTF-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<title>Document</title>
<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/font-awesome/4.7.0/css/font-wesome.min.css" />
<style>
body {
margin: 0px;
margin-top: 10px;
padding: 0px;
}
nav {
width: 100%;
background-color: rgb(39, 39, 39);
overflow: auto;
height: auto;
}
.links {
display: inline-block;
text-align: center;
padding: 14px;
color: rgb(178, 137, 253);
text-decoration: none;
font-size: 17px;
}
.links:hover {
background-color: rgb(100, 100, 100);
}
input[type="text"] {
float: right;
padding: 6px;
margin-top: 8px;
margin-right: 8px;
font-size: 17px;
}
.selected {
background-color: rgb(0, 18, 43);
}
@media screen and (max-width: 830px) {
.links {
display: block;
}
input[type="text"] {
display: block;
width: 100%;
margin: 0px;
border-bottom: 2px solid rgb(178, 137, 253);
text-align: center;
}
}
</style>
</head>
<body>
<nav>
<a class="links selected" href="#">
<i class="fa fa-fw fa-home"></i> Home
</a>
<a class="links" href="#">
<i class="fa fa-fw fa-user"></i> Login
</a>
<a class="links" href="#">
<i class="fa fa-user-circle-o" aria-hidden="true"></i> Register
</a>
<a class="links" href="#">
<i class="fa fa-fw fa-envelope"></i> Contact Us
</a>
<a class="links" href="#">
<i class="fa fa-info-circle" aria-hidden="true"></i> More Info
</a>
<input type="text" placeholder="Search Here.." />
</nav>
</body>
</html>Output
This will produce the following output −

When the screen will be resized to 830px following output will be produced −
