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Version (latest)

This edition introduced the Container pseudo-layout: a launchpad for working with container queries.

Third edition

This edition introduced logical properties for better compatibility with different languages and their writing modes. It also updated the Frame component to use the aspect-ratio property, which is now widely supported.

Second edition

This edition converted a number of layouts to use the gap property which has come to be widely supported with Flexbox as well as Grid. Using gap simplifies many layouts and makes them easier to understand.

First edition

We actually added a lot more content after the initial release but we hadn’t started recording “editions” so all of those updates are implicitly part of the first edition.