Agustin Capeletto

This is a big deal for #CSS! Scroll-driven animations are finally cross browser 🎉

I think we're at a stage where people (we) are more interested in the human aspect of a channel/blog/content than ever; and I love that.

I *may* have over-engineered this shadow designer just a touch but gawwwddamn, she pretty. #Lumen for #CSS → lumen.renderg.host

What new HTML and CSS features should you be using to help your design system thrive? Check out Declan’s article to get the lowdown ➡️ https://hubs.li/Q04B6Hh30

@kevinpowell.co your videos have inspired a whole generation of CSS creators, myself included. So thank you! New workflows may let us iterate faster, but taste is trained by doing. Tools can’t do the caring for us 🤖

If anyone is looking to make a static site given recent events, then you should check out Web Origami. My favourite way to author sites. weborigami.org

✍️ Just published a new post about my most-anticipated CSS proposals from Interop 2027! If you’re not familiar, the Interop project is a collaboration between browsers to pick shared focus areas. There’s *so much* good stuff this year, it was hard to pick just 10!

If you ever struggled with understanding if your CSS performance issues are coming from style calculation or from layout, LoAF's styleDuration and layoutDuration is shipping in Chromium 158 to help with that groups.google.com/a/chromium.o...

More range sliders with fancy shapes? Let's go! This time with a tooltip showing the value. curve, wave, zig-zag, arc ... Which one do you prefer? css-tip.com/shaped-range... 0% JavaScript and 100% CSS magic (border-shape, shape(), scroll-driven animations, and more!)

glyphcss 0.3 is out: diagrams and charts drawn entirely in text Flowcharts, trend lines, sequence, mind maps, git graphs, sankeys, donuts and more, rendered into monospace cells for the web, terminals and chat Try it glyphcss.com

Experimenting with container queries this weekend 👨‍💻 This article explains the pattern clearly.

JPEG XL has arrived on the web, but how does it stack up against AVIF? jakearchibald.com/2026/jpeg-xl...

If you've wondered why I haven't written a new blog post in about a month. It's because of this. 👇 typography.damato.design I've written a few posts about web typography in the past year, and even a talk in January. I've decided all of it probably needs a single place. So, this is the place.

We have a new way to render clouds in 3D CSS! Thousands of soft gas and dust particles, turned to face you as you orbit Live on the Homunculus Nebula, blown out by Eta Carinae in the 1840s, with three datasets: the gas cloud, its outer shell model and how the gas moves css.earth/homunculus-nebula

Starting my week on #TRAPPIST-1, a planetary system with seven Earth-sized worlds (around 40 light-years away). I added the habitable zone and stellar wind datasets, and I'm working on surface maps. css.earth/trappist-1-s... 👽

🙋‍♂️ so, what are the git forges you are using - or want to be using? asking for … reasons. (would appreciate sharing for reach)

It’s Friday, so let’s close out the week with some Good Links™ in The Index #201!

📝 New CSS Article! With Scroll-Driven Animations, you can transfer a value from one element to another anywhere on the page. I am using it to implement children-count(). Strange? Confusing? What the heck am I talking about?! Read my latest article 👇 blog.master.dev/transferring...

GitHub.com has fully moved off CSS-in-JS to CSS Modules, resulting in 55% less server-side render time and 25% faster component init. https://github.blog/engineering/architecture-optimization/improving-site-performance-by-shipping-more-css/

Just hypnotised by this cute web crawler #buildinpublic #webcrawling #CSS #JavaScript

Loafing on the #caturday

My optimistic take is that human voices are becoming more important than ever, and that will eventually lead to more blogs and weirder personal websites 💚

I was recently introduced to straw.page, a maximalist Geocities-inspired drag-and-drop website builder. Apparently it's most popular with Gen Z, and it makes me so glad to know this sort of spirit lives on. 😄 🧵 A few examples in-thread.

1) Place a little cutie on the border of parent element with `offset-path: border-box;` 2) Animate to random positions like `offset-distance: random(0%, 100%);` 3) Swoon blog.master.dev/randomly-pla...

px in CSS ≠ a pixel on a display. This is something that is obvious when you think about it at all, but many people seem to gloss over it. I was explaining it to someone and figured I'd be best to jot it down: vale.rocks/micros/20260...

Trying this library for perf tracing an iPad over USB 🧑‍💻 Very useful so far!

Ron Cobb’s original signage designs for Alien, made with felt tip pen and graph paper. humanoidhistory.tumblr.com/post/8286472...

✍️ New Article: Detect when elements overlap with CSS Can CSS tell when two elements overlap? At first, I thought this was not possible, but it turned out it can be done with scroll-driven animations and anchor positioning. ishadeed.com/article/css-...

ssimulacra2 is cool. Extremely useful for image optim 👨‍💻

Friends, it's that time of the year: Once again, I'm asking you to help me create another amazing HTMHell Advent Calendar by writing about HTML. The CFP is open until October 3! docs.google.com/forms/d/e/1F...

you can read what I've written about why this is EXACTLY my role in leading nuxt > I would be remiss not to speak about values. > Values shape the direction of projects and people [and] the culture of open source communities […] both in where we end up + what the journey there is like.

Bounce! 🏐 (CSS only) Live demo @codepen.io: codepen.io/editor/amit_...

This is an extremely odd article from WIRED. It almost seems to be trying to fabricate some sort of culture war around CSS? Bizarre.

This GIF from @joshwcomeau.com's last email is mesmerizing. Here's the border-shape he made of that codepen.io/editor/joshw...

Working on the #caturday 👨‍💻

Corner-shape is the best way to build a triangle in #CSS, especially for 3D scenes. Very happy to see this! 🦊

Screw the narrative. Don’t believe the scare. The Web will never die. Love seeing you all sharing and publishing content on here – and on your personal sites and newsletters! 💚✊

It's the 2026 LED ART CSS Challenge! 🥳 I've created an LED experiment! Fork the @codepen.io, Do something cool! The most creative & maddest will feature in my next YouTube. tinyurl.com/56cpxceh tinyurl.com/3y6tuv58 #CSSChallenge #CodePen #WebDev #CreativeCoding #CSSArt #LEDArt #FrontEndDev

I always recommend this book by @kennethstanley.bsky.social and @joelbot3000.bsky.social It explains that the creative process is nonlinear, and how exploration can lead to serendipity 💡 In talk form: www.youtube.com/watch?v=VDuF...

We're a while off from being able to leverage ::checkmark with checkbox styling, but here's a decent way to get the styling control you want, while preserving the useful parts of the native input element. piccalil.li/blog/a-decen...

This is a great introduction to sibling-count() and sibling-index() by @kevinpowell.co. It's got me excited about using it. youtu.be/6-cg8Z74MPI

We should have been writing articles and having fun with CSS, but instead... We can't do much against big corporations (except wait), so let's give Geoff some support. Share (or try) his HTML/CSS course: thebasics.dev 100% human-made by the one who edited 86945 CSS articles!

Love it! 🤩 📦 How far can we take the #CSS #ledart challenge?

🙋‍♂️ ever wanted to build something without needing to configure a db, auth, file storage or a cms? it turns out you already have all four if you have a bluesky account 👉 airspace is a typed client for it

New blog post: Esoteric HTML - ismap vs CSS https://shkspr.mobi/blog/2026/09/esoteric-html-ismap-vs-css/ The HTML specification is old and, while there is beauty in longevity, there's an inevitable build-up of boondoggles and baggage. Some elements like <marquee> have sadly been consigned to …