Christian "Schepp" Schaefer

Chrome 156 shipped CSS random(). Sure, you could make snowfall or slightly tilted buttons. Or you could do stochastic calculus. With confetti 🎉 acorns.nutlore.me/css-monte-ca...

Happy 25th Birthday Windows XP! On October 25, 2001, Microsoft released Windows XP and began a new era of Windows operating systems.

FOMO over recent conferences? Or even from last year? Join us next month in Brighton for 2026.ffconf.org - join your peers, join the conversations you can't have with your chatbot, join us for 8 amazing talks and one superb day. Get your ticket today, don't FOMO-FFCONF.

Really curious what the results of this one will be. So far, I've been pretty terrible at predicting the top result 😅 What is your favourite color format in CSS? asked-100-devs.netlify.app

I was once again a guest on the German-speaking 🇩🇪 @workingdraft.de podcast 🎙️ to talk about the Cross-Origin Storage API: workingdraft.de/723/. thoroughly enjoyed chatting about this exciting API proposal with @schepp.dev and @sirpepe.bsky.social. Track #CrossOriginStorage for more.

Analysts estimate that 70%+ of Microsoft, Google and Amazon's present and future AI revenues are from Anthropic and OpenAI's compute spend and model sales. Outside of two unsustainable AI labs, demand barely exists, and they've massively overbuilt capacity. www.wheresyoured.at/the-ai-deman...

+++ The Venue +++ Everything happens in one place. Talks, coffee, dinner and conversations - no rushing between locations, just an evening focused on learning and meeting fellow frontend developers. See you at Fronteers Dark Mode? Fronteers Dark Mode Oct 2nd in Dordrecht 🇳🇱 🎟️ fronteersconf.org

Bordeaux, France, has now recorded more days above 40°C in 2026 alone than during the entire 105-year period from 1920 (when observations began) to 2025. This is deeply shocking.

+++ Meet Your Host: Jake Archibald +++ We're delighted to welcome Jake Archibald as Master of Ceremonies for Fronteers Dark Mode. Expect technical insights, plenty of enthusiasm, and a few laughs as Jake guides us through the evening. Fronteers Dark Mode Oct 2nd in Dordrecht 🇳🇱 🎟️ fronteersconf.org

+++ The Dinner +++ The best conference conversations often happen over dinner. Every Fronteers Dark Mode ticket includes a delicious two-course meal - the perfect chance to meet speakers and fellow attendees. 🍽️ 🥩 | 🐟 | 🥬 Included with your ticket. Oct 2 in Dordrecht 🇳🇱 🎟️ fronteersconf.org

+++ Dordrecht +++ Come for the conference. Stay for the city. Fronteers Dark Mode takes place in historic Dordrecht, with its canals, cafés and beautiful old streets. The perfect backdrop for an evening with the frontend community. Fronteers Dark Mode Oct 2nd in Dordrecht 🇳🇱 🎟️ fronteersconf.org

Another conference, From the Front, brought me to Bologna back in 2012. What a beautiful city! It's also a perfect base for day trips to Modena (balsamic vinegar), Maranello (Ferrari), Ravenna (stunning mosaics), and Florence. So if @nodejs.org, JS, and 🇮🇹🍝 sound like your kind of combo, go for it! 👇🏼

📝 A quick post that's somewhat obvious, but I think it's important. A simple formula for keeping good things around. daverupert.com/2026/07/numb...

+++ Speaker Spotlight: Barry Pollard +++ What if browsers could stream HTML where it's needed, without all the JavaScript? At Fronteers Dark Mode, Barry Pollard explores Declarative Partial Updates, a proposal that could reshape server-rendered apps. Oct. 2nd in Dordrecht 🇳🇱⛵️ 🎟️ fronteersconf.org

+++ Speaker Spotlight: Anjana Vakil +++ Can weather become music? Anjana Vakil combines the WebAudio API and Tone.js to turn live weather data into ambient soundscapes, exploring synthesis, waveforms and creative coding in the browser. Fronteers Dark Mode Oct 2nd in Dordrecht 🎟️ fronteersconf.org

+++ Speaker Spotlight: Cyd Stumpel +++ You might not need JavaScript. Modern CSS features like View Transitions and Scroll-Driven Animations make it possible to create rich motion effects without reaching for JS. Fronteers Dark Mode Oct 2nd in Dordrecht 🇳🇱 🎟️ fronteersconf.org

+++ Speaker Spotlight: Harry Roberts +++ What if the fastest framework was... the browser? Harry Roberts explores why building with native web platform features leads to faster, more accessible and easier-to-maintain websites. Fronteers Dark Mode Oct 2nd in Dordrecht 🇳🇱 🎟️ fronteersconf.org

+++ Speaker Spotlight: Heydon Pickering +++ Can HTML make music? Heydon Pickering takes us down a fascinating rabbit hole, exploring how a tiny custom element can turn HTML into a surprisingly expressive musical instrument. Fronteers Dark Mode Oct 2nd in Dordrecht 🇳🇱 🎟️ fronteersconf.org

this is pretty cool ... they're launching v3 on producthunt today. 👉 shaders.com 👉 www.producthunt.com/products/sha...

Breaking News! Code: UFB!!! It's official! The "Super El Nino" has begun, with Niño 3.4 sea-surface temperatures now 2.0°C (3.6°F) above the 1991-2020 baseline. The Climate 8-ball is getting racked.

Heard of the Supporters of Chromium-Based Browsers (aka SoCBB)? No? Well, we at Microsoft came together with Meta, Opera, and Google to fund improving code, fixing bugs, interop issues in Chromium, so it stays healthy. Said another way: get paid to fix chromium bugs!

spotted on Reddit: this menu card from a Lufthansa flight explaining the bibimbap being served the Korean text apparently translates to: "You know how to eat bibimbap, right? You are experts. So, please understand that we need more space for English and German instructions."

Warum fällt es mir schwer, hier an Zufall zu glauben? Und selbst wenn es einer sein sollte: das ist ein Versagen vermeintlich „neutraler“ KI. Gerade im Vergleich zu Claude mit viel ausgewogeneren Werten.

1/ Erinnert Ihr Euch noch an Döpfners WELT-Wirtschaftsgipfel wo Leute wir Palantir-CEO Karp direkt exklusiv zur versammelten Bundesregierung sprechen konnte? Gestern fand bei Springer nun ein sogenannter Sicherheitsgipfel statt. Interessant wer sich die Klinke in die Hand gab👇🏼

Doesn’t matter what it is, please tell me honestly, how much money do you spend per month on your main hobby? I’m working on a talk and I’m curious to get a wild figure. Feel free to reply, DM or email me. 100% no judgement, just amateur data research. Boost for reach please 💖

Frankreichs Atomkraftwerke vor dem Hitze-Problem: https://eay.li/43b #blog

Based on the feedback at @css.cafe I opened a few issues to discuss at open UI on the enhanced range inputs. I also tried to make some new examples with waves and circles. 😅 brechtdr.github.io/enhanced-ran...

Prop For That 📣 An a-la-carte #JS library for #CSS developers that writes meaningful realtime CSS variables to an element: - value of an input - pointer position - size of scrollbar(s) - colors in an image/video - element's visibility - tons more… nerdy.dev/prop-for-that

Back home after a fantastic few days of @cssday.nl and @css.cafe. I once again forgot to take selfies with people. There are probably some images flying around. I'm such an idiot. 😂 But wow, I had fun. I learned, I socialized and I have Inspiration for months to come. First a bit of sleep tho 😅

And now up to @schepp.dev showing how he created a dark/light toggle without altering html using CSS carousels. ♥️ At @css.cafe

Just letting you know: There are less than 100 tickets left for #SotB2027 Tickets go back on sale 19 Jun 2026 09:00. In the meantime buy tickets for @pixelpioneers.co, @webdevconf.com, & @fronteers.bsky.social

#cssday continued… Great chats with @schepp.dev and @erwinhofman.bsky.social, advanced CSS talks with @kizu.dev, learned a lot from @joshtumath.uk, got my brain melted by @html5test.com, and of course special thanks to @rgadellaa.bsky.social for fighting the good battle with @open-web-advocacy.org.

If like me you think @bram.us shouldn’t be stealing @jakearchibald.com code then I sent some stickers to #CSSDay I believe that they have almost gone

We need more rich people with normal interests like "your movie sounds neat" instead of, like, white fertility rates.

If you're a web developer and want to come to Japan, the CFP for #JSConf Japan 2026 is now open! Your travel and lodging expenses for the conference are covered, so it's a great chance to visit Japan while you're at it. jsconf.jp/2026/en

Our favourite conference of the year is back: CSS Day ✨ CSS legends, browser engineers, and web platform experts sharing talks on modern CSS, accessibility, design systems, browser internals, and much more. cssday.nl See you next week in Amsterdam? ☕️

I got a 365 points knowledge score on this year’s #StateOfCSS survey! I have used 27 features, and knew 19 more, placing me in the top 100% of all respondents. Can you beat my score? survey.devographics.com/survey/state...

It's often uneasy for me to share my experiences as a woman in tech, but this job market has me worried for everyone stuck somewhere harmful. I admire everyone who takes on "women in tech" speaking gigs but I am also angry for them and us. ohhelloana.blog/woman-in-tec...

Tickets are now paused for State of the Browser until 09:00 19 June. Buy tickets for other events in the meantime. 2027.stateofthebrowser.com/tickets/ We are advertising: @pixelpioneers.co @fronteers.bsky.social @webdevconf.com Also signup for newsletters for: @ffconf.org @viewportconf.org

Lovely episode of the @workingdraft.de Podcast with Hans, @schepp.dev and guest Niels Leenheer. beyondtellerrand.com/blog/link---...

FOR LOOPS IN 100% CSS codepen.io/propjockey/p... 🫳 🎤

Going to show my age here with this vintage VHS tape inspired @codepen.io creation....!!! 😅 💜 📼 codepen.io/GemmaCroad/p...

This is exactly the kind of resource the web platform needs more of: practical, test-backed guidance on how modern CSS features actually behave with Shadow DOM.

Web-Performance ist kein Feinschliff am Ende. 80 % der Bottlenecks entstehen im Frontend, auch heute noch. Schepp zeigt, wie ihr mit weniger JavaScript, mehr CSS und Web Workern wirklich schnelle Apps baut. 🎧 Jetzt reinhören: www.programmier.bar/podcast/deep... #webperformance #GarreltMockRockt

Anyone (know someone who) knows someone that works on Anthropic's Claude in Chrome extension? I'm a co-chair of the WebExtensions Community Group and I'd love to learn about the team's experience building this extension. Reposts welcome 😊