<!DOCTYPE html>
<html>
<title>W3.CSS</title>
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="4/w3.css">
<link rel="stylesheet" href="../../cdnjs.cloudflare.com/ajax/libs/font-awesome/4.7.0/css/font-awesome.min.css">
<body>
<div class="w3-container">
<h2>Navigation Bar with Dropdown</h2>
<p>Click on the Dropdown link to open the dropdown menu.</p>
<div class="w3-bar w3-light-grey">
<a href="#" class="w3-bar-item w3-button">Home</a>
<a href="#" class="w3-bar-item w3-button">Link 1</a>
<div class="w3-dropdown-click">
<button class="w3-button" onclick="myFunction()">
Dropdown <i class="fa fa-caret-down"></i>
</button>
<div id="demo" class="w3-dropdown-content w3-bar-block w3-card">
<a href="#" class="w3-bar-item w3-button">Link 1</a>
<a href="#" class="w3-bar-item w3-button">Link 2</a>
<a href="#" class="w3-bar-item w3-button">Link 3</a>
</div>
</div>
</div>
</div>
<script>
function myFunction() {
var x = document.getElementById("demo");
if (x.className.indexOf("w3-show") == -1) {
x.className += " w3-show";
} else {
x.className = x.className.replace(" w3-show", "");
}
}
</script>
</body>
</html>