I started a new chapter of my Agentic Engineering Patternw guide about anti-patterns - things NOT to do
So far I only have one: Inflicting unreviewed code on collaborators, aka dumping a thousand line PR without even making sure it works first simonwillison.net/guides/agent...
👏 very good MDN Docs, very good 👏
<input type="range" id="volume" name="volume" min="0" max="11" />
developer.mozilla.org/en-US/docs/W...
Ide til ny profilbakgrunn.
Everybody thinks 'https://' stands for 'hypertext transfer protocol secure' but it actually stands for 'head to this place, sucka' followed by a colon and two laser sounds
this is super cool (in theory; i have not tested)
i think in general we're moving towards the world where the most valuable software output is a spec (tests / types / api)
i built an entire x86 CPU emulator in CSS (no javascript)
you can write programs in C, compile them to x86 machine code with GCC, and run them inside CSS
lyra.horse/x86css/
I just did the dumbest thing of my entire career to prove a much more serious point.
I tricked ChatGPT and Google, and made them tell other users I’m a competitive hot-dog-eating world champion
People are using this trick on a massive scale to make AI tell you lies. I’ll explain how I did it
The box art for a game called Colony Wars, unfortunately cropped to cut off the last letter of each word, making it instead appear to say "Colon War"
object-fit: cover;
Why did adding ONE component make your build drastically slower?
The answer is often: Barrel files.
Luckily, you can enable Lazy Barrel Optimization in @vite.dev 8 and @rolldown.rs do bring your build time back to normal.
Want to know more? Check the video & docs
rolldown.rs/in-depth/laz...
🧐
In Firefox 147, you no longer need heavy libraries to (de)compress brotli with JS - you can just use CompressionStream and DecompressionStream!
This is great - it's about time someone updated the discourse on LLM energy usage to reflect that coding agents use massively more prompts than occasional questions to ChatGPT
Simon estimates that a day of coding agent usage comes out close to the energy needed to run a dishwasher
Woah. jQuery migrated to ESM!
Come on other big libraries! No excuses now.
TIL Firefox DevTools console has a $$$('selector') command that returns an array of matching elements, including those in shadow roots.
I also enjoy that they renamed Remote Desktop to Windows App and the Windows App is available in the App Store for Mac where the tab title becomes "Windows App App - App Store"
apps.apple.com/us/app/windo...
This is true and I was the only one on set excited about it (and playing the song on my phone to blank stares)
Web Performance Calendar X-mas edition with Nicolas Hodin on BFCache: a huge UX win, but easy to break with Cache: no-store, unload handlers, iframes, or long-lived connections
calendar.perfplanet.com/2025/chasing...
For the performance minded: it's Dec 1. This means that the *Planet Performance* Web Performance Calendar is looking for contributors. It's been going since 2009. Working on something? Case studies? Pls share! All the info is below. Curated by @stoyan.me !
calendar.perfplanet.com/contribute/
Web Performance Calendar day 2 with Matt Zeunert (of @debugbear.com) exploring large HTML documents in the wild. Larger document means more content, right? Or does it?
calendar.perfplanet.com/2025/explori...
You all should be starring this repo and following up on every npm security best practice: github.com/lirantal/npm...
This mural has gone up in Kingston, ostensibly for Christmas but AI has ensured it's actually to celebrate the return of our dark lord Cthulhu
Enhancing Web Components Safely with Self-Destructing CSS
scottjehl.com/posts/web-co...
The European Union Office of Silly Walks.
Excellent talk! Highly recommended!
Heller lesehest enn boksvin.
Lit is joining @openjsf.org! 🎉
Today at JSConf, The OpenJS Foundation announced Lit is officially joining as an Impact Project!
We're beyond excited for this move and look forward to continuing our work to build the open web with OpenJS!
Read more on our blog: lit.dev/blog/2025-10...
This is just a stupider version of “Don’t Look Up”
Why does this happen?
Kubernetes monitors the WRONG metrics for Node.js. CPU and memory miss what actually matters:
✓ Event loop utilization
✓ Heap usage
✓ Real-time responsiveness
Traditional HPA takes MINUTES to react. Your Node.js app needs SECONDS.
apropos of nothing, my favorite thing in my apartment
absolutely superb (gave up at level 17)
