In this one-hour session, Manuel Matuzović will test the websites you provide for accessibility issues and show you quick first steps you can take to identify and assess them. You will learn how to us...

5 rounds of this year's Premier League are behind us. Let's see which teams are the most entertaining.

Hello, my dear friends of high-quality markup! We're getting closer to the last quarter of 2026, which means that the HTMHell Advent Calendar is getting closer, too. Last year, once again, you contrib...

In this “beautiful” era of spelunking, booping, and flibbertigibbeting, I often procrastinate by playing these little fun games.

In this “beautiful” era of spelunking, booping, and flibbertigibbeting, I often procrastinate by playing these little fun games.

Invalid CSS features CSS declarations that are not valid and non-existing yet. For example, flex-wrap: pretty.

Invalid CSS features CSS declarations that are not valid and non-existing yet. For example, :flex-last-row.

Invalid CSS features CSS declarations that are not valid and non-existing yet. For example, :flex-last-in-row.

Invalid CSS features CSS declarations that are not valid and non-existing yet. For example, :flex-first-in-row.

Invalid CSS features CSS declarations that are not valid and non-existing yet. For example, :flex-nth-in-row.

Invalid CSS features CSS declarations that are not valid and non-existing yet. For example, :flex-only-in-row.

Invalid CSS features CSS declarations that are not valid and non-existing yet. For example, :x-scroll.

Personal sites are sick as hell, so this site was built so we can all discover each other's. This directory of links are by folks that want to share their site with the world.

Invalid CSS features CSS declarations that are not valid and non-existing. For example, :overflow.

Every element I use for the basic structure of a HTML document, with explanations why.

Sometimes designers have silly ideas that eventually grow on you. That happened to me with this concept where I had to build columns of items moving in

Play MapTap - the daily geography game! Find 5 world locations on a 3D globe with historical stories. Free browser-based daily game for geography lovers.

Alt: Sexual Harrasment Panda's Sad Quote.

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Find more performant and safer replacements for outdated or unnecessary npm packages.

Vale's article: https://vale.rocks/micros/20260521-0440 Matthias' article: https://matthiasott.com/notes/ad-infinitum My article that I mentioned in passing:…

Moving away from Tailwind, and learning to structure my CSS

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

Let's try a fresh take on animating focus rings around a page. Flying focus, as it were. Only instead of measuring where elements are ourselves, we'll let View Transitions figure it out.

This is Part 1 of a two-part series about cross-document view transitions, going over all the gotchas, from ditching the deprecated way to opt into them to a little-known 4-second timeout.

Using the round() function to get a more predictable fluid sizing.

Why styling on semantics and roles could make accessibility harder to skip

Safari and Firefox change how big sites render based on the domain. TikTok, Netflix, Instagram… even SeatGuru. Chrome doesn’t. Why is that?

In this issue: how browsers treat big sites differently, fluid sizing with round(), animating focus rings, and more.

Explore the exhausting list of music concerts and festivals I attended. The list is long, so I grouped them into Epic, Favotite, and Others groups.

Realistic WebGL glass effects for any HTML element — refraction, blur, chromatic aberration, specular highlights, and more.

Read the book online for free.