Plz try this one
<script>
window.addEventListener('keyup', function(e) {
if (e.keyCode === KeyCode.KEY_RETURN) {
console.log('It was the Return key.');
} else {
console.log('It was any other key.');
}
});
<script>
OR
<!DOCTYPE html>
<html lang="en">
<head>
<title>Bootstrap Example</title>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css">
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>
<script>
var pKey;
$(function () {
$(window).keydown(function (e) {
if (e.which == 17) {
pKey = e.keyCode;
}
else {
if (pKey == 17 && e.keyCode == 78) {
e.preventDefault();
console.log(e);
}
}
});
});
</script>
</head>
<body>
<div class="container">
<h2>Well</h2>
<div class="well">Hello G...</div>
</div>
</body>
</html>