To set the background image to be fixed in JavaScript, use the backgroundAttachment property. It allows you to set an image that won’t scroll.
Example
You can try to run the following code to learn how to work with backgroundAttachment property with JavaScript −
<!DOCTYPE html>
<html>
<body>
<button onclick="display()">Click to Set background</button>
<p>Demo Text</p>
<p>Demo Text</p>
<p>Demo Text</p>
<p>Demo Text</p>
<p>Demo Text</p>
<p>Demo Text</p>
<p>Demo Text</p>
<p>Demo Text</p>
<p>Demo Text</p>
<p>Demo Text</p>
<p>Demo Text</p>
<p>Demo Text</p>
<p>Demo Text</p>
<p>Demo Text</p>
<p>Demo Text</p>
<p>Demo Text</p>
<script>
function display() {
document.body.style.background = "url('https://www.tutorialspoint.com/html5/images/html5-mini-logo.jpg') no-repeat right top";
document.body.style.backgroundAttachment = "fixed";
}
</script>
</body>
</html>