PHP JavaScript

Hide a navbar when the user starts to scroll the page using javascript

<!DOCTYPE html>
<html>
<head>
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <style>
        body {
            margin: 0;
            background-color: orange;
            font-family: Arial, Helvetica, sans-serif;
        }
        #navbar {
            background-color: #333;
            position: fixed;
            top: 0;
            width: 100%;
            display:block;
            transition: top 0.3s;
        }
        #navbar a {
            float: left;
            display: block;
            color: red;
            text-align: center;
            padding: 15px;
            text-decoration: none;
            font-size: 17px;
        }
        #navbar a:hover {
            background-color: green;
            color: orange;
        }
    </style>
</head>
<body>
<div id="navbar">
    <a href="#home">Home</a>
    <a href="#news">News</a>
    <a href="#news">About Us</a>
    <a href="#news">Contact Us</a>
    <a href="#news">Sitemap</a>
</div>
<div style="padding:15px 15px 2500px;font-size:30px;margin-top:30px;">
    <p><b>This example demonstrates how to hide a navbar when the user starts to scroll the page.</b></p>
    <p>Scroll down this frame to see the effect!</p>
    <p>Scroll up to show the navbar.</p>
</div>
<script>
    var prevScrollpos = window.pageYOffset;
    window.onscroll = function() {
        var currentScrollPos = window.pageYOffset;
        if (prevScrollpos > currentScrollPos) {
            document.getElementById("navbar").style.top = "0";
        } else {
            document.getElementById("navbar").style.top = "-50px";
        }
        prevScrollpos = currentScrollPos;
    }
</script>
</body>
</html>

Result:

PHP JavaScript

Hide navbar when user starts to scroll the page down using javascript

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