Chrome 154 adds support for responsively-sized iframes, letting an iframe size itself based on the intrinsic size of its embedded document.

You can always easily style :hover, but what if you want the NEXT item to have styling too? Or, just a smidge harder, the PREVIOUS item. How about multiple in any direction?

A look at how flex items wrap and how to balance them across lines.

YouTube video by Grow Now! Games

YouTube video by Pixel Pioneers

You normally don't think of images as overflowing themselves, nor can you put anything else inside to make it overflow, but actually...

An influential spec editor thinks polyfilling is harmful. I think blaming polyfills for compat accidents is like blaming car crashes on the ambulances that show up — and the alternative is a stagnant ...

Welcome to New in Edge for developers, a new series featuring recent web platform updates in Microsoft Edge that help web developers build better sites and apps. In this first edition, we'll look at ...

We recently got the shape() function and corner-shape property. What else could we possibly need as far as making shapes in CSS? Let me tell you: the border-shape property!

For decades, one of the most notoriously-challenging problems on the web has been sticking one element to another element, for things like tooltips and nested menus. The CSSWG has decided to provide a...

Here's a technical walkthrough of how I made a fun little demo to mask some text in a clever way with CSS.

The 'ideal' sizing is more complicated than you think…

Build a theme toggle that persists user choices, respects system preferences, and works without JavaScript. A layered approach to handling mode and theme selection across sessions.

An atlas of the vibrance of the real world

A comprehensive history of web browsers on video game consoles. From the CD-i to modern systems, exploring the evolution of the web on consoles in detail. Covering bespoke iterations, releases by PlanetWeb and NetFront, contemporary engines across Sega, PlayStation, Nintendo, and Xbox platforms, and other details.

Cross-document view transitions bring app-like navigation to classic multi-page sites — with a single CSS at-rule and no framework at all.

YouTube video by Apple Developer

Learn Grid Lanes to create masonry layouts in pure CSS. Absorb the possibilities with the Field Guide’s interactive playground. Return to the cheat sheet. Get inspired by six real examples with dozens...

Take the State of CSS survey

A better way to build web sites. Fast, flexible, and built to last.

YouTube video by Kevin Powell

Safari 26.5 is here, delivering the :open pseudo-class, the element-scoped keyword for random(), color-interpolation for SVG gradients, the ToggleEvent.source property for popovers, and the Origin API...

Exploring the math and intuition behind blend modes in the browser

A collection of utility functions to more easily work with View Transitions.

Think you know CSS? We'll show you a property name. You decide: real CSS, or complete BS. It starts easy. It does not stay easy.

Think you know CSS? Real property or made-up nonsense? 20 rounds. No mercy.

An interactive journey through 30 years of the web