How TO - Scroll Indicator
Learn how to create a scroll indicator with CSS and JavaScript.
How To Create a Scroll Indicator
Step 1) Add HTML:
Example
<div class="header">
<h2>Scroll
Indicator</h2>
<div class="progress-container">
<div class="progress-bar" id="myBar"></div>
</div>
</div>
<div>content...</div>
Step 2) Add CSS:
Example
/* Style the header: fixed position (always stay at the top) */
.header {
position: fixed;
top: 0;
z-index: 1;
width:
100%;
background-color: #f1f1f1;
}
/* The progress
container (grey background) */
.progress-container {
width: 100%;
height: 8px;
background: #ccc;
}
/* The progress bar (scroll indicator) */
.progress-bar {
height: 8px;
background:
#4caf50;
width: 0%;
}
Step 3) Add JavaScript:
Example
// When the user scrolls the page, execute myFunction
window.onscroll =
function() {myFunction()};
function myFunction() {
var winScroll = document.body.scrollTop ||
document.documentElement.scrollTop;
var height =
document.documentElement.scrollHeight - document.documentElement.clientHeight;
var scrolled = (winScroll / height) * 100;
document.getElementById("myBar").style.width
= scrolled + "%";
}
Try it Yourself »
