What is parallax scrolling? Parallax scrolling is a computer graphics technique used by web designers to create a faux-3D effect. As users scroll down a webpage, different layers of content or backgrounds move at different speeds, and this creates an optical illusion. Using parallax scrolling is not a new technique.

What is parallax in HTML?

Parallax scrolling is a web site trend where the background content (i.e. an image) is moved at a different speed than the foreground content while scrolling.

How is parallax used to measure distance?

The parallax formula states that the distance to a star is equal to 1 divided by the parallax angle, p , where p is measured in arc-seconds, and d is parsecs.