Great news! The CSS sibling-count() and sibling-index() functions are now Baseline Newly Available! I.e implemented in all major browsers.
sibling-count() and sibling-index() - Web platform features explorer
The sibling-count() and sibling-index() CSS functions return integers that are useful to style elements based on their positions among siblings or on the number of siblings, for example as part of a c...
web-platform-dx.github.io
★ Required reading for makers of websites: Matuzo’s HTML boilerplate in 2026. Every element that world-class front-end dev, author, a11y auditor & web standards speaker @matuzo.at uses for the basic structure of an HTML document … with explanations. Updated from his classic 2021 boilerplate.
My HTML boilerplate in 2026 - Manuel Matuzović
Every element I use for the basic structure of a HTML document, with explanations why.
matuzo.at
An interactive demo showing how all the values adjust in real time as the grid is resized. codepen.io/t_afif/full/... via @codepen.io All the values are integers, so you can use counters to display them.
💡 CSS Tip! Using modern CSS, it is now easy to extract information from a responsive grid. You can get the number of columns, the number of rows, and item coordinates. css-tip.com/grid-informa... A handy code to save for (hopefully) the near future.
On July 4, 2007, Chris Coyier, a web designer, established the CSS-Tricks portal. The portal brings web designers daily news and tutorials from the world of web design. #WebDesignHistory
@cssday.nl would it be possible to select/targret specific columns? Like :nth-column(2)? Thinking about the column switching post-it example where the color changed per column.
YES, Dark Mode Toggles _should_ be a browser feature. I wrote about this before: brm.us/dark-mode-ov... Find the link to the Chrome Bug in the post, and hit the star next to it to "upvote" the bug. (I even have a prototype extension to provide this for you: brm.us/chrome-dark-...) #cssday
Dark Mode Toggles Should be a Browser Feature
When implementing Dark Mode and ways to toggle it, developers currently need to duplicate code and roll their own toggle implementation. What if, instead, browsers would take care of all that?
brm.us
#cssday @brucel.bsky.social @joshtumath.uk how does this work (or doesn’t) with the fluid typography “trend”?
[A gong sounds in the distance] Three houses of JavaScript remain…
"These issues aren’t just technical, they directly impact accessibility. When AI doesn’t recognise or represent users accurately, it creates barriers instead of removing them." @ronsman.bsky.social #a11y onsman.com/the-impact-o...
The Impact of AI on Digital Accessibility, Part I – Ricky Onsman
onsman.com
Yeahhhhh, but I think the oklch technique is better random-stuff.jakearchibald.com/color-contra...
contrast-color() demo
random-stuff.jakearchibald.com
Hello @bram.us, could I bother you with what may be a trivia question? Why is it not possible to use @starting-style on a ::view-transition-new? My scenario is: I turned off the animation for the group and would like to have the new one start clipped at half the height, to make a div expand.
"No web standard should require you to agree to an advertising company’s “terms of use.”" @wil.to wil.to/posts/google...
Google’s Prompt API
No web standard should require you to agree to an advertising company’s “terms of use.”
wil.to
Being good at using LLMs includes 1. Being able to provide context and craft prompts that limit the risk of hallucinations AND 2. Having processes and frameworks to vet the quality of the output from the LLM instead of blindly trusting it.
Introducing Cursor Camp, a website to hang out with other cursors. Out now :) > neal.fun/cursor-camp/
The Component Gallery | An up-to-date repository of interface components based on examples from the world of design systems, designed to be a reference for anyone building user interfaces. | component.gallery
The Component Gallery
An up-to-date repository of interface components based on examples from the world of design systems, designed to be a reference for anyone building user interfaces.
component.gallery
Mr. @davatron5000.bsky.social and I on @whiskey.fm for St. Pats day. whiskey.fm/flogging-mar... I DRINK, and I KNOW HOW TO ROUND RECTANGLES. [in my best Tyrion Lannister voice]
whiskey.fm
More context on this #Artemis II image: * This is the night side, lit by moonlight. You can see city lights in Spain & Portugal, & a sliver of day at lower right * The Sun is entirely behind Earth, which makes it a kind of solar eclipse, but w/ Earth doing the eclipsing instead of the Moon: ☀️🌍🚀🌕
The last time human eyes were far enough from Earth to see the whole globe was December 1972. www.nasa.gov/image-detail...
✨ I just published a new blog post! It’s a deep dive into a subtle UI detail from my blog. I suspect most people don’t even notice it, but I regularly hear from the folks who *do* notice it and want to know how on earth I’m doing it. Feels a bit like I’m a magician revealing their trick. 😂
Sneaky Header Blocker Trick • Josh W. Comeau
There is a lil’ UI detail on this blog. Most people don’t even notice it, but the ones who do often reach out, asking how on earth it works. It feels like it defies the rules of CSS! In this blog post...
joshwcomeau.com
Who will be crowned the inaugural March MadCSS Champion? @joshwcomeau.com OR @tolin.ski The final premieres TOMORROW at 10AM EST. www.youtube.com/watch?v=7rOU...
One Last Battle
YouTube video by Syntax
youtube.com
Thread and video in case you've feeling the "Oh no! CodePen is going to be different!" feels. 2.0 can be almost identical to Classic, only dipping into new features when you're ready.
If you love the Classic @codepen.io Editor and want that same feel in the 2.0 Editor, here are some quick tweaks to get you back into familiar territory. Try the 2.0 Editor: codepen.io/editor/pen
Launch sale is on and purchasing parity power is available, too! thelayoutmaestro.com
The Layout Maestro by Ahmad Shadeed
Build any web layout with confidence. Learn practical CSS layout through visual lessons, interactive demos, and a proven layout mindset.
thelayoutmaestro.com
My new CSS course is out 🥳, The Layout Maestro. It's all about teaching you how to think and decide what CSS to use. Here is a peek from inside the content.
Build your bracket for the world's first ever CSS tournament, March MadCSS. Premieres Friday 10ET on YouTube, and the stakes are high. win over $1,500 worth of prizes madcss.com
The Madcss.com bracket challenge is LIVE. HUGE Prizes just for picking the right bracket. Puck who you think will win the massive 2026 CSS tournament!
March Mad CSS
The Ultimate CSS Tournament. Brought to you by Syntax
madcss.com
16 developers. 15 minutes. Single elimination. Round 1 begins March 6. Who do you think is taking it all? Fill out your bracket now at madcss.com
16 developers. 15 minutes. Single elimination. Round 1 begins March 6. Who do you think is taking it all? Fill out your bracket now at madcss.com