How to create: slide down the navigation bar during scrolling

How to slide down the navigation bar

Step 1 - Add HTML:

Create navigation bar:

<div id="navbar">
  <a href="#home">Home</a>
  <a href="#news">News</a>
  <a href="#contact">Contact</a>
</div>

Step 2 - Add CSS:

Set navigation bar style:

#navbar {
  background-color: #333; /* Black background color */
  position: fixed; /* Make it stick/fixed */
  top: -50px; /* Hide the navigation bar 50px outside the top view */
  width: 100%; /* Full width */
  transition: top 0.3s; /* Transition effect when sliding down (up) */
}
/* Set the style for navigation bar links */
#navbar a {
  float: left;
  display: block;
  color: white;
  text-align: center;
  padding: 15px;
  text-decoration: none;
}
#navbar a:hover {
  background-color: #ddd;
  color: black;
}

Step 3 - Add JavaScript:

// When the user scrolls down 20px from the top of the document, slide the navigation bar downwards
// When the user scrolls to the top of the page, slide the navigation bar upwards (50px from the top view)
window.onscroll = function() {scrollFunction()};
function scrollFunction() {
  if (document.body.scrollTop > 20 || document.documentElement.scrollTop > 20) {
    document.getElementById("navbar").style.top = "0";
  }
    document.getElementById("navbar").style.top = "-50px";
  }
}

Try It Yourself