Starfield is a JavsScript class that displays an animated starfield in a div element.
Live Example: https://dwmkerr.github.io/starfield/
Create a HTML div initialize a Starfield like this:
var container = document.getElementById('container');
var starfield = new Starfield();
starfield.initialise(container);
starfield.start();Ensure starfield.js file is in the same directory as the HTML file.
<!DOCTYPE html>
<html>
<head>
<title>Starfield</title>
<style>
#container {
width: 100%;
height: 100%;
position: absolute;
left: 0px;
top: 0px;
z-index: -1;
}
</style>
</head>
<body>
<!-- The main starfield container, fills the entire screen. -->
<div id="container"></div>
<script src="starfield.js"></script>
<script>
// Get the container and turn it into a starfield.
var container = document.getElementById('container');
var starfield = new Starfield();
starfield.initialise(container);
starfield.start();
</script>
</body>
</html>You can configure the Starfield by setting the following properties on the class:
var starfield = new Starfield();
starfield.stars = 200; // The number of stars.
starfield.minVelocity = 5; // The minimum star velocity in pixels per second.
starfield.maxVelocity = 15; // The maximum star velocity in pixels per second. This code was created for Create a Starfield, the first article of my Learn JavaScript series on CodeProject.