HTML 5 Readiness was a site that showed through a rainbow of colors the browser support for several web features. What about a new version?

Well, it turns out that SVG’s built-in animation features were never deprecated as planned. Sure, CSS and JavaScript are more than capable of carrying the load, but it’s good to know that SMIL is not dead in the water as previously thought, and is actually well-supported.

One thing we can do to help teams code consistently is provide type-checking so that all of the configurable options for a specific component are available while coding. Bryan demonstrates how he does this with TypeScript when working with Astro components.

Interactive CSS animations with elements ricocheting off each other seem more plausible in 2025. While it’s unnecessary to implement Pong in CSS, the increasing flexibility and power of CSS reinforce Lee’s suspicion that one day it will be a lifestyle choice whether to achieve any given effect with scripting or CSS.

Masonry in CSS: There’s a new, third option in the debate that combines Flexbox and CSS Grid features into a …

With visual regression testing, we can update a page, take screenshots before and after the fact, and compare the results for unintended changes. In this article, learn how to set up visual regression testing using Playwright.

Having been tasked with creating a UI component for navigating the content of an online course, Daniel found himself neck-deep in a pool of new CSS features that he wound up using on the project.

There’s a bit of a blind spot when working with CSS logical properties concerning shorthands.

I’ve used border-image regularly. Yet, it remains one of the most underused CSS tools, and I can’t, for the life of me, figure out why. Is it possible that people steer clear of border-image because its syntax is awkward and unintuitive? Perhaps it’s because most explanations don’t solve the type of creative implementation problems that most people need to solve. Most likely, it’s both.

I’ve seen a handful of recent posts talking about the utility of the :is() relational pseudo-selector. No need to delve …

Ooo, look at that: Safari Technology Preview 215 adds support for scroll-driven animations, anchor positioning, and text-wrap: pretty. That’s a …

In this article, you’ll learn how to make a full-on star rating component out of nothing but a single input element and vanilla CSS.

Now that we’re 5+ years into the details element, we know more about it than ever before. I thought I’d round that information up so it’s in one place I can reference in the future without having to search the site — and other sites — to find it.

The grain of truth was that even if you love your job, it can’t love you back. Yet what I’m hooked on isn’t one job, but the power of code and language.

The View Transitions API is more a set of features than it is about any one particular thing. And it gets complex fast. But in this post, we’ll cover a couple ways to dip your toes into the waters without having to dive in head-first.

I know, super niche, but it could be any loop, really. The challenge is having multiple tooltips on the same page that make use of the Popover API for toggling goodness and CSS Anchor Positioning for attaching a tooltip to its respective anchor element.

My thesis for today’s article offers further reassurance that inline conditionals are probably not the harbinger of the end of civilization: I reckon we can achieve the same functionality right now with style queries, which are gaining pretty good browser support.

A while back on CSS-Tricks, we shared several ways to draw hearts, and the response was dreamy. Now, to show my love, I wanted to do something personal, something crafty, something with a mild amount of effort.

Adam’s such a mad scientist with CSS. He’s been putting together a series of “notebooks” that make it easy for …

The speaker list for CSS Day 2025 is lookin’ mighty fine, tell you what. Event is scheduled June 5-6 and …

We’ve been able to get the length of the viewport in CSS since… checks notes… 2013! Surprisingly, that was more than a …

A little gem from Kevin Powell’s “HTML & CSS Tip of the Week” website, reminding us that using container queries opens up container query units for sizing things based on the size of the queried container.

The steps for how I took the Baseline Status web component and made it into a WordPress block that can be used on any page of post.

Are partials the only thing keeping you writing CSS in Sass? With a little configuration, it’s possible to compile partial CSS files without a Sass dependency. Ryan Trimble has the details.

Did you see the release notes for Chrome 133? It’s currently in beta, but the Chrome team has been publishing a slew of new articles with pretty incredible demos that are tough to ignore. I figured I’d round those up in one place.

When using View Transitions you’ll notice the page becomes unresponsive to clicks while a View Transition is running. … This …

All of the things that the CSS Working Group would change if they had a time-traveling Delorean to go back and do things over.

The @view-transition at-rule has two descriptions. One is the commonly used navigation descriptor. The second is types, the lesser-known of the two, and one that probably envies how much attention navigation gets. But read on to learn why we need types and how it opens up new possibilities for custom view transitions when navigating between pages.

After 20 years since Andy Clarke first published his book about Multi-Column Layout in CSS, he’s back to encourage a fresh look at CSS columns for enhanced readability and design flexibility.

When it comes to positioning elements on a page, including text, there are many ways to go about it in CSS — the literal position property with corresponding inset-* properties, translate, margin, anchor() (limited browser support at the moment), and so forth. The offset property is another one that belongs in that list.