jquery scroll down hamburger menu button
<!DOCTYPE html>
<html lang="en">
<head>
<title>How to Create a jQuery back to top button with smooth scroll</title>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.7.0/css/font-awesome.min.css">
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.4.1/jquery.min.js"></script>
</head>
<body>
<h1>Hello, click on “back to top” button and come on top!!!</h1>
<a href="#backTop" class="backTop-btn"><i class="fa fa-arrow-up" aria-hidden="true"></i><br>Back to Top</a>
</body>
</html>