CodePen - Solar System 3D Animation (Pure CSS)

Popover API Sliding Nav

Here’s a nifty demo of popover but it’s not for what we’d traditionally consider a modal dialog.

Offloading JavaScript With Custom Properties: HeydonWorks

With classes, we can send CSS static values but with custom properties we can send dynamic ones, which is a major shift in the way we can style state. This is something that has been true for some time—and is extremely well supported—but sometimes it takes solving a small real-world problem to make you appreciate the value of it.

I think we still haven’t come to fully appreciate the superpower of custom properties: dynamic values that are shared between CSS and JavaScript.

Revealing ‘back to top’ button

Such a clever minimalist use of CSS!

Clamp calculator | Utopia

Oh, this is a nice addition to the Utopia set of tools: when you don’t need a full-on type scale but you still want to figure out fluid clamp() values, the clamp calculator has you covered.

It’s got permalinks too!

Some simple ways to make content look good - Set Studio

This is a terrific walkthrough from Andy showing how smart fundamentals in your CSS can give you a beautiful readable document without much work.