<!DOCTYPE html>
<html>
<title>W3.CSS</title>
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="../lib/w3.css">
<body>
<nav class="w3-sidenav w3-white w3-animate-left" style="display:none;z-index:5">
<a href="javascript:void(0)" onclick="w3_close()"
class="w3-closenav w3-large">Close ×</a>
<a href="tryit.asp-filename=tryw3css_ref_sidenav_overlay_class.html#">Link 1</a>
<a href="tryit.asp-filename=tryw3css_ref_sidenav_overlay_class.html#">Link 2</a>
<a href="tryit.asp-filename=tryw3css_ref_sidenav_overlay_class.html#">Link 3</a>
<a href="tryit.asp-filename=tryw3css_ref_sidenav_overlay_class.html#">Link 4</a>
<a href="tryit.asp-filename=tryw3css_ref_sidenav_overlay_class.html#">Link 5</a>
</nav>
<div class="w3-overlay w3-animate-opacity" onclick="w3_close()" style="cursor:pointer"></div>
<div class="w3-container">
<span class="w3-opennav w3-xxlarge" onclick="w3_open()">☰</span>
<h2>Page content..</h2>
<p>The w3-overlay class can be used to create an overlay effect, when opening the sidenav. The w3-overlay class adds a black background with a 50% opacity to the "page content" - this effect will "highlight" the side navigation</p>
<p>Click on the menu icon (☰) to see the effect.</p>
</div>
<script>
function w3_open() {
document.getElementsByClassName("w3-sidenav")[0].style.display = "block";
document.getElementsByClassName("w3-overlay")[0].style.display = "block";
}
function w3_close() {
document.getElementsByClassName("w3-sidenav")[0].style.display = "none";
document.getElementsByClassName("w3-overlay")[0].style.display = "none";
}
</script>
</body>
</html>