The weekly newsletter has kicked off again. A few highlights: ticket date announced, CFP is open and some dooooomish links for this week: ffconf.org/articles/202...

I just finished Performance Engineering in Practice by Den Odell from @manning.com . It's a fantastic book. He takes a measurement-based approach to determining what you can improve and discusses performance for web, desktop, APIs & more. Definitely worth checking out! hubs.la/Q044cvRX0

Closes Tuesday! 🙌 It’s dead good here.

Prompted by @bram.us' encouragement, I've written about popovers and the backdrop psuedo selector and how I think…it can lead to anti-patterns, it certainly did for me. remysharp.com/2026/05/08/p...

This is going to be an awesome event - Utrecht's such a great city, the tech scene in the Netherlands is excellent, and I'll be telling y'all the story of how a joke language based on Bon Jovi songs became a tour de force of modern software engineering.

"We aren’t asking for favors; we are demanding the basic dignity of a usable interface." #a11y accessaces.com/beyond-furio...

Read it for free: Accessibility For Everyone by @laurakalbag.com. h/t @sekai.co.uk. accessibilityforeveryone.site #a11y #BooksNeverDie #ABookApart

Hello—The Book of Birds by me & the artist Jackie Morris is published…today A re-imagining of the field guide/bird book for our age of wonder & loss, from Avocet to Yellowhammer. Jackie has painted over 300 original artworks for it; I’ve tried to let language soar, glide & plunge. For the birds!

Hi, bluesky 🦋 - do you know of any good resources on how to pick the body/ main content font? If you don't know yourself, reposts appreciated. Thank you! 🙏

Waku v1.0.0-alpha.10 just dropped. Enjoy the latest feature: "prune build output" Waku is a React framework designed for RSC from day one. Check it out: waku.gg

Tomorrow: adrianroselli.com/2025/11/pre-... #DigitalAccessibilityEthics

Would you like to work in a Trust where Principals are equal partners in leading the MAT? Where Principals are trusted, respected & have autonomy? Where we all work together for the greater good? We’re recruiting now for a Principal at one of our primary schools. Come join us!

Does school mathematics sometimes feel like a checklist of disconnected procedures? What if instead we focused on five BIG IDEAS? Explore this brand new, comprehensive and completely free website for teachers: bigmathematicalideas.org #MathEd #MathTeacher #BigMathematicalIdeas

Allow me to follow this with a shameless plug that you can learn accessibility and improve your job prospects with Practical Accessibility: practical-accessibility.today Make sure to read the article to also be aware of common red flags in accessibility job postings. #a11y

Josh’s courses are always of the highest quality: clear, practical, fun deep dives into modern techniques and approaches.

✨ It’s the final day of the launch sale for my new course, Whimsical Animations! The price will nearly double in a few hours. whimsy.joshwcomeau.com You can see the exact amount of time remaining here:

A really important thread here. An industry without people like Josh producing extremely high quality education really is bleak.

For the past 6 years, I’ve been working on developer education full time, on my online courses + blog. It’s been an incredible privilege to be able to focus on this stuff. ✨ I’m starting to wonder, though, whether the business model I’ve chosen is sustainable. Let me explain… 🧵

Good post on de-frameworking your frontend from Nuxt/Tailwind to #webcomponents by @wbrowar.com wbrowar.com/article/code...

Finished my Q*bert retro arcade cross-stitch! If you played this I bet you can hear his little hop sound in your head 🙂 #NerdStitch

This blog post is so short it (is) a social post. remysharp.com/2026/05/01/d... But if I don't blog it, I'll forget it. Huge thanks to @keithamus.social for sharing it.

Forgot to mention: I’m running a 40% launch sale! But only for the first week. ⏰

Passing automated checks is not the same thing as delivering an accessible experience.

My Thoughts on RSC: Is It Just Serialization? How Waku Has Evolved newsletter.daishikato.com/p/my-thought...

🎉 Registration is now open for my latest course, Whimsical Animations! This course will teach you everything you need to know to design and build stunning, creative animations and interactions. It’s time to make the web less generic and boring! 😄

✨ Tomorrow’s the day! After 18+ months of work, Whimsical Animations will be releasing to the public. 😄 I just sent a FAQ about the course to everyone on my newsletter. If you have any questions about it, they might be answered here:

Woohoo! Great to see @andrewmaths1.bsky.social on BlueSky! Looking forward to seeing some great Maths questions and resources shared on this platform! Do follow him! #Mathstoday #ALevelMaths

Are you looking for a primary headship post? I’m about to advertise a position in Essex. Looking for someone to join our fantastic group of 22 principals. Watch this space for advert soon. Or get in touch for info.

A *fantastic* article all about CSS containment: csswizardry.com/2026/04/what..., containing practical use cases, gotchas, performance and debugging tips. A goldmine of a resource from none other than the #CSS Wizard himself: @csswizardry.com

Did you know that all of our courses still have a 20% discount, using the code NEXTLEVEL? Did you also know that you can sample them all for free too? JavaScript for Everyone: piccalil.li/javascript-f... Mindful Design: piccalil.li/mindful-desi... Complete CSS: piccalil.li/complete-css...

We've got a really exciting project running next year - a pilot of using graphical calculators in AQA Level 2 Further Maths. Schools get PD, resources and a loan set of calculators for a year. Places are strictly limited but you can apply now!

👉 I added a spring mode to my animated SVG desert landscape Spring’s definitely sprung, and it’s a wonderful time to be in the desert. stuffandnonsense.co.uk/blog/i-added...

I was playing around in @desmos.com Geometry with triangles that share the same nine-point circle, and I accidentally made a pretty pattern. www.desmos.com/geometry/mk3... #iTeachMath #MathSky

#mathsconf40 reminded me how awesome the community is despite the social media lull nowadays. Really enjoyed the sessions I was part of, particularly @mr-man-maths.bsky.social international questions... rich seam!

Big thanks to everyone who joined us for #MathsConf40! It was inspiring to see so many maths educators sharing ideas, resources, and passion. Collaboration like this makes a real difference for our students. Keep an eye on our socials—#MathsConf41 is coming soon 👀

So happy that @teachertapp.bsky.social have featured my recent blog about the fallacy of comparing the ease with which kids learn popular song lyrics and the difficulty they have in learning things in the classroom. Read it for yourself here: educatingmrmattock.blogspot.com/2026/04/they...

My #MathsConf40 workshop choices: 1 - Joe Berwick 2 - Alexandria Dowson 3 - Colin Warden 4 - Matt Man 5 - Dr Ed Southall Join me with @lasalleed.bsky.social, get your ticket here: completemaths.com/community/mathsconf40

3 days. 72 hours. One epic day of maths. ⚡️ The stage is set in Derby for #MathsConf40! Don't miss your chance to join hundreds of educators for the ultimate day of inspiration and community. ⏰ Last call for tickets – get yours now: 👉 completemaths.com/community/ma...

IT'S FINALLY COMPLETE! (35% OFF) Just submitted the last bits to complete my latest book with Manning. M Right now, you can buy the book digitally and physically for 35% off. Find this and all my other books at books.alexmerced.com #ApacheIceberg #DataLakehouse #DataEngineering

Reflexes

It’s published! www.joshwcomeau.com/animation/sq...

Really worth looking at these **FREE** @nrichmaths.bsky.social webinars nrich.maths.org/events-teach...

Under the hood of MDN's new frontend developer.mozilla.org/en-US/blog/m... - using React to serve essentially static content "accumulated quite a lot of technical debt", and is better replaced by … Web Components and CSS, AKA "the web platform". developer.mozilla.org/en-US/blog/m...

My #MathsConf40 workshop choices: 1 - Greg Thomas & Anna Berry 2 - Jo Morgan 3 - George Bowman 4 - Saskia Roobaert 5 - Dr Ed Southall Join me with @lasalleed.bsky.social, get your ticket here: completemaths.com/community/mathsconf40

Maths Teachers — If you could add a feature/resource type/section onto Mathsbox that would save you time or improve your lessons, what would it be? 👇 Would love to hear your ideas.

⏳ Just 7 days to go until #MathsConf40 in Derby! In just one week, hundreds of maths teachers will be coming together for a day of learning, collaboration, and inspiration. 🧮✨ 🎟️ Be part of it – secure your place today: completemaths.com/community/ma...

I will say, on a positive note, that @sarasoueidan.com’s course has been a shining light in the darkness for me. Haven’t finished it yet, about half way through, but it’s very very good if you don’t know where to start.

Looking forward to leading a "different" type of workshop! Inspired by being away from the UK for Easter, we will look at exam papers from other countries and see how they compare! Come round to #Mathsconf40 and find out more!

The course is being released in a couple of weeks! You can learn more here: whimsy.joshwcomeau.com