<!DOCTYPE html>
<html lang="en">
<head>
<title>
jQuery Detect Mobile Device
</title>
</head>
<body>
<script>
if (window.matchMedia("(max-width: 767px)").matches)
{
// The viewport is less than 768 pixels wide
document.write("This is a mobile device.");
} else {
// The viewport is at least 768 pixels wide
document.write("This is a tablet or desktop.");
}
</script>
</body>
</html>