Days 32&33 of 100 Days of Code: Finished The Joy of React 🥳🥳 It was a great course! @joshwcomeau.com goes into so much detail that I ended up with a much deeper understanding of React, even for the concepts I was already familiar with. #100DaysOfCode #LearnInPublic

30 #CSS scroll driven animation examples which is your favorite? - z-stack and slither are mine nerdy.dev/scroll-drive...

I decided ~3 weeks ago to start learning to play guitar, and I’ve been having *so* much fun with it! The lovely thing about learning new skills is how quickly you progress at first; I’m still terrible, but I’m noticeably less terrible than I was a week ago. 😂

The future is so, so dumb 😂

This is true in tech as well. Sometimes folks ask how I got testimonials from prominent devs on my course sites, and the answer is usually that we’ve known each other for many years. If you’re just starting out, get to know others at the same level. Play the long game.

PSA: if you have a business pitch for someone, or want them to hire you as a contractor, your chances of success decrease by 100% if you have ChatGPT write the message for you. 😅

What on earth. 😂

This video is such a monumental step backwards. 😅

👀 Working on the third module of my animations course, where we learn to create advanced cursor interactions. Having fun with eyes. Not creepy at all. 😅

I once made the mistake of downloading Microsoft Edge on my mac. I uninstalled it a long time ago, but Microsoft AutoUpdate remains, and every day it asks me if I want to update the AutoUpdate application. 😂 Just figured out how to erase it. Good riddance.

It took a while (mainly due to the huge quantity of data collected on some questions!), but the #StateOfHTML 2025 survey results are now live! 2025.stateofhtml.com/en-US/ Big thanks to @lea.verou.me who not only designed the original survey back in 2023, but then came back this year to update it.

There’s still time to complete the State of React survey, if you haven’t yet! These surveys are both a community service *and* a great way to learn about modern React features. Win-win 😄

RSC Explorer is now open source! tangled.org/danabra.mov/...

Really happy to have published this post that I've been working on for a few months now 🥰 Safe to say I enjoy these side quests - I'd like to think it's the first of many! blog.owenlacey.dev/posts/are-yo...

You can even write SVG emojis 😲 my first whimsical emoji :D

Researchers have found two new vulnerabilities in React Server Components while attempting to exploit the patches last week. These are new issues, separate from the critical CVE last week. The patch for React2Shell remains effective for the Remote Code Execution exploit.

Bruno’s *last* portfolio site was one of the coolest things I’d ever seen on the web. I don’t even have vocabulary for this one. 😂

"there's a new serif in town"

✨ Exciting proposal alert: the CPU Performance API. This proposal will add `navigator.cpuPerformance`, a value that measures the broad performance capability of the CPU. That way, we can scale up/down our animations to make sure everyone has the best experience possible for their device. 😄

This week on The Callback, we look at: - the Bun acquisition - AI deleting hard drives - 90's commercials It's everything you've asked for and more! www.youtube.com/watch?v=MLeU...

You too can make a tiny, fixed-width website in the year of our lord 2025 ⚡️ lynnandtonic.com

I’m super excited to see what people come up with for this! The winner gets a copy of my animations course 😄

TIL that glass has a flow rate, like liquid! So if you wait long enough, a tall pane of glass would eventually become a puddle on the ground. That flow rate is 1 nanometer per billion years. 😂

Wow 😮

An unpopular belief I hold: kids aren’t actually *that* much better at learning languages than adults. Kids are often immersed in language, spending up to 16 hours a day practicing for many years. Adults will typically take a 3-hour-a-week course. It’s a totally different level of investment.

I decided to pay the $20 to try Claude Code, since I’ve heard good things about it, and holy smokes, this has been a rough onboarding / first impression. 😅 I’ve had so many little irritations in the first 20 minutes, but I want to focus on one. Hopefully y’all can tell me what I’m doing wrong here.

A perfect CVSS 10 🧑🏻‍🍳💋 CVE-2025-55182: Unauthenticated remote code execution vulnerability in React Server Components The vuln is in versions 19.0, 19.1.0, 19.1.1, and 19.2.0: react-server-dom-webpack react-server-dom-parcel react-server-dom-turbopack Upgrade immediately!

sneak peek of a little atproto app i’ve been working on. it’s called sidetrail it is for sharing “trails”. a trail is a sequence of stops where you do, learn, or think. a trail feels personal — it is whatever “worked for you” (this is a mockup with fake data)

As someone who is self taught, I know there are massive gaps in my knowledge. I want to do better for who I work for and thankfully they are very supportive. So looking forward to this. (Also I really need it lol)

Part way through this. I highly recommend

@joshwcomeau.com is still running his Black Friday for another 18+ hours. If you're a web developer who wants to learn from the tippity top, do was last-year-me said and get this bundle (which, admittedly, should've been titled "Bundle of Joy"). Plus, you'll be supporting one helluva great fella.

Just read www.joshwcomeau.com/css/subgrid/ by @joshwcomeau.com . Amazing work, as always!

Oh I never announced my "Advent of" intentions! I'm doing Advent of Courses where I go back and finish courses I paid for lol First up hitting the catalogue from the legend @joshwcomeau.com 🎉

Friendly reminder: the Black Friday sale I’m running ends tomorrow! 🎈 The best deal is on the bundle, which is an eye-watering US$500 off right now. 👀 www.joyforjs.com

Nice write-up by @joshwcomeau.com in his latest newsletter where he takes a look at some of the struggles AI still have with CSS, including what looks like a fairly simple example that it simply can't handle, as well as the benefits of deep knowledge. www.joshwcomeau.com/email/black-...

Genuinely two of the most helpful "cheat-sheet" tools for development that I use more than I probably should admit: - Operator Lookup by @joshwcomeau.com. I blanked on !! today and look at that, it's there! joshwcomeau.com/operator-lookup - keycode.info by @wesbos.com. Does what it says on the tin.

100% this! I've putting Replit and Cursor with different models to test and it's okay for typical UIs (media components, list, etc), but it's *very* bad for tricky UIs like the one Josh shared. Learn CSS.

Here’s a question I get a lot: > “Now that AI can generate front-end UIs for us, what’s the point of learning CSS ourselves?” I think there are lots of reasons, including that you can use AI much more effectively if you understand CSS yourself. But is that actually true? Let’s discuss. 🧵

🎈 Friendly reminder that my courses are on sale for Black Friday! I’ve gotten a lot of positive feedback about them, including this lovely testimonial just today. If you live in India, or another country with similar purchasing power, you can combine the Black Friday sale with a regional license. 💸

last week i remembered that macOS lets you set your own icons and that *I* have the power to delegitimize the professionalism of the software that runs on my machine, so here's a thread of the 16 new icons i've made so far i really forgot how fun it was to just sit down and make art for myself :')

The whole @badass.dev empire is running 50% discounts. - @marcysutton.com with testingaccessibility.com - @mattpocock.com with totaltypescript.com - me with TestingJavaScript.com, EpicWeb.dev, and EpicReact.dev Great time to grab top tier education!

I’ve got a deal going too for Testing Accessibility! So much good stuff! testingaccessibility.com/buy

You're already reading @joshwcomeau.com's interactive blog content (you are, aren't you?), so his course content is the natural extension. Same Josh-Style, Same Josh-Polish!

🎈 I shared my 10 favourite BF deals in my newsletter today. So much good stuff on sale this year! Featuring @b0rk.jvns.ca, @sarasoueidan.com, @kevinpowell.co, @scott.is, @wil.to, @bradfrost.com, @kulkarniankita.com, @citizenofnowhe.re, @kentcdodds.com, @nan.fyi, and @thecodercoder.bsky.social.

A bit of a vulnerable post by me but we need your help to get us through what has been a more difficult period than 2020. It would be really appreciated if you could read and share in your networks too 💛 bell.bz/its-been-a-v...

Lots of course creators are running Black Friday sales. I’ve been making notes about some of the most compelling offers, and I have a list of 10 *fantastic* deals. I’ll be sending a newsletter issue about it tomorrow. 😄 Have you scored any great Black Friday deals? Anything I should include?

I just had a 🤯 moment understanding how #CSS subgrid enables a child of a grid to determine how the template of the parent grid is calculated and therefore affect the layout of its siblings within that grid 😲

love seeing all the #CSS subgrid excitement in my timeline!! def @joshwcomeau.com inspired 🤘🏻 now that your subgrid interest is piqued, checkout a post I made too‽ maybe even just for the long list of resource examples at the end web.dev/articles/css...

✨ I just published a new post, and it’s all about one of the most mind-blowing new CSS features: subgrid. Honestly, when I first heard about subgrid, I figured it’d be a convenient little utility. I had no idea it would solve one of the most longstanding issues I’ve had with CSS. 😮 Check it out:

Always nice to get a shoutout at the start of a @joshwcomeau.com article! This one's on subgrid. If you haven't been using it yet, as you'd expect, it's great, and you should give it a read 🙂 www.joshwcomeau.com/css/subgrid/