Scroll Jacking with CSS

Right now you are reading content inside of a fixed-position child of a relatively-positioned transparent area.

You are hovering over the transparent area (the white tint background) which is displaying this content. This fixed child content has a colored background image with a blend mode which appears to modify the original background image you saw before hover.

If you keep scrolling down you will see a line. If you hover beneath that line you will be hovering over the next section and it will make this content disappear.

Changing Hover Areas

You are now reading the second section's fixed content with a green background. This is because you are hovering over the second section (the white tint background).

If you didn't move your mouse and scrolled to get here, you may have noticed that the hover event doesn't fire until scrolling has completely stopped. This is default browser behavior.

This means you can quickly scroll to the bottom of the page and it will skip the sections along the way.

Why This is Awesome

As you can see, the result is pretty amazing for not using any Javascript. This goes to show you that CSS can do some pretty crazy things.

Why This Sucks

First off, you cant select this text because the "hover" section areas are sitting on top of it. This is because we need to hover event to make this work.

Secondly, this pen is useless if you aren't hovering over it, so you cant use this on a tablet or phone. Relying on hover is a terrible idea.