Semantic HTML does a lot more accessibility work than we usually give it credit for already — and ARIA is simple to abuse when we use it both as a shortcut and as a supplement.

A while back, Temani tacked a repeating grid of hexagon shapes. Well, he's updated it with modern CSS features that result in fewer magic numbers. And it's impressive!

The @custom-media at-rule has landed in Firefox Nightly! I couldn't find it in the release notes but Adam Argyle's on the beat noting that it's behind a flag

Accessibility advice around modals have commonly taught us to trap focus within the modal. Upon further research, it seems like we no longer need to trap focus within the <dialog> (even in modal mode).

The new ::search-text pseudo (Chrome 144) matches are yellow while the current target (::search-text:current) is orange, but ::search-text enables us to change that.

Stu Robson's ReliCSS (clever name!) tool can excavate outdated CSS in your codebase that have modern CSS solutions.

Neither Chrome, Safari, nor Firefox have shipped new features in the last couple of weeks, but fear not because leading this issue of What’s !important is some of the web development industry’s best educators with, frankly, some killer content.

I've always thought that creating a VS Code theme was a lot of work. But lo and behold, it took less than six hours to get it working, then a day or two to polish up my final tweaks.

You’d think that publishing a VS Code extension is an easy process, but it’s not. You have to publish your theme in at least two places.

CSS-only bar charts are one of those things we've tackled a bunch of times in different ways. But how can modern CSS features finally make it not only trivial, but fun?

Can we make pie chart that's semantic, with flexible markup, and avoids using a JavaScript library? Here's how I tackled it.

The new contrast-color() function is not fully supported yet. But can we still implement it in a cross-browser friendly way using other new CSS features?

This is the second part of a small two-part series. In this article, we will explore another type of grid: a pyramidal one. We are still working with hexagon shapes, but a different organization of the elements., while exploring other different shapes.

This issue of What’s !important is dedicated to our friends in the UK, who are currently experiencing a very miserable 43-day rain streak. Presenting: the five most interesting things to read about CSS from the last couple of weeks. Plus, the latest features…

Interop 2026 is officially a thing and there's plenty of new (and even old) CSS features that we can look forward to being cross-browser compatible and consistent!

Lee accepts a challenge: arranging text in a spiral that animates as a vortex on scroll... all in CSS.

The distinction between "components" and "utilities" seems clear at first glance, but gets a little blurred when working with them in Tailwind.

Danny has several ideas for how we could use :near(), a proposed pseudo-class that detects when the pointer is near an element.

Let’s get nuanced in this article and discuss the capabilities of both SVG and raster imaged so that you can make informed decisions in your own work.

Browsers don't just let you bookmark web pages. You can also bookmark JavaScript, allowing you to do so much more than merely save pages.

Read an explanation of the recent CVE-2026-2441 vulnerability that was labeled a "CSS exploit" that "allowed a remote attacker to execute arbitrary code inside a sandbox via a crafted HTML page."