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

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

<!DOCTYPE html>
<meta name="viewport" content="width=device-width, initial-scale=1">
body {
margin: 0;
background-color: orange;
font-family: Arial, Helvetica, sans-serif;
#navbar {
background-color: #333;
position: fixed;
top: 0;
width: 100%;
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;
<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 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>
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;


Automatic Image Slider Using Javascript

<!DOCTYPE html><html>
<title>Automatic Slider Using Javascript</title>
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="https://www.w3schools.com/w3css/4/w3.css">
<style> .mySlides {display:none;} </style>
<h2 class="w3-center">Automatic Slideshow</h2> <div class="w3-content w3-section" style="max-width:500px"> <img class="mySlides" src="C:\Users\csuser\Desktop\ssss\images\download.jpg"
style="width:100%"> <img class="mySlides" src="C:\Users\csuser\Desktop\ssss\images\images.jpg"
style="width:100%"> <img class="mySlides" src="C:\Users\csuser\Desktop\ssss\images\shanghai.jpg"
style="width:100%"> </div> <script> var myIndex = 0; carousel(); function carousel() { var i; var x = document.getElementsByClassName("mySlides"); for (i = 0; i < x.length; i++) { x[i].style.display = "none"; } myIndex++; if (myIndex > x.length) {myIndex = 1} x[myIndex-1].style.display = "block"; setTimeout(carousel, 2000); // Change image every 2 seconds } </script> </body> </html>


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