Alexander Lehner
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alexlehner86.bsky.social
Alexander Lehner
@alexlehner86.bsky.social
66 followers 230 following 80 posts
Web Developer, SciFi and Comic Nerd, gamer (tabletop and PS5). Speaks 🇦🇹🇩🇪🇺🇲🇪🇸
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Reposted by Alexander Lehner
joshwcomeau.com
Tools like Cursor or Claude Code make us *feel* more productive, but can we trust that perception?

I added a new blurb to my 2025 post about AI, “The Post-Developer Era”, which digs into a recent study about developer productivity and AI:
Perception vs. reality So, here’s an interesting question: are we actually faster when we use AI tools in our development, or does it just feel faster? This question was recently explored in a 2025 study(opens in new tab) from METR. They assigned hundreds of real-world open-source tasks to experienced developers. The experiment group used Cursor with Claude 3.5/3.7, while the control group was forbidden from using any sort of AI. The results are striking: When developers are allowed to use AI tools, they take 19% longer to complete issues—a significant slowdown that goes against developer beliefs and expert forecasts. This gap between perception and reality is striking: developers expected AI to speed them up by 24%, and even after experiencing the slowdown, they still believed AI had sped them up by 20%. So, in this study, developers thought they were working 20% faster, but in fact, they were working 20% slower. 😮 Now, there are lots of caveats here. The study only looked at 16 developers, and most of those developers had limited prior experience using AI tools. In fact, the participant with the most AI experience was an outlier in the findings, and was able to work 38% faster with AI. So, I’m not fully comfortable with the study’s conclusion, but I do think there’s a lot of truth to the idea that we can’t always trust how we feel about our own productivity. We tend to remember the exciting moments where an agent knocks it out of the park, while the less-successful attempts fade from our memory. Erik Kennedy summarizes this point well in his post, Where’s the AI Design Renaissance?(opens in new tab): My hunch: vibe coding is a lot like stock-picking – everyone’s always blabbing about their big wins. Ask what their annual rate of return is above the S&P, and it’s a quieter conversation 🤫
November 24, 2025 at 8:35 PM
alexlehner86.bsky.social
Chrome 143 adds support for CSS anchored fallback container queries. With this new feature, I was able to animate my custom menu with CSS only for different anchor positions. Suck it, JavaScript! 😜
#css #anchorPositioning #popover #animation #webdev

www.oidaisdes.org/anchored-con...
Flexible Menu Animation with Anchored Container Queries
We can query the currently active fallback position and apply different styles with CSS only.
www.oidaisdes.org
November 24, 2025 at 1:19 PM
Reposted by Alexander Lehner
meyerweb.com
You may have missed my #CSS anchor positioning livestream with @miriam.codes and @jamessw.com earlier today, but that’s okay! The geeks at YouTube figured out some kinda magic capture thing that lets you play back live events whenever you want. Here’s ours: www.youtube.com/watch?v=qOXY...
Cross-browser Anchor Positioning
YouTube video by Winging It
www.youtube.com
November 20, 2025 at 7:37 PM
Reposted by Alexander Lehner
bell.bz
@gerireid.com is so good gerireid.com/blog/can-ai-...
Can AI write accessibility specs?
I wrote a prompt to help me write accessibility specs for components. Then had an existential crisis.
gerireid.com
November 20, 2025 at 9:06 AM
Reposted by Alexander Lehner
sarasoueidan.com
📣 Hear hear! The biggest savings on the Practical Accessibility course start *today*—for a limited time only.

Starting today, you can get the course for 30% off — that's $279 instead of $399. The discounted price excludes sales tax that may be applied depending on where you are buying from.
The Practical Accessibility Course
A get-right-down-to-it online course for Web designers and developers who want to start creating more accessible Web user interfaces and digital products today
practical-accessibility.today
November 20, 2025 at 2:58 PM
Reposted by Alexander Lehner
firefoxdevtools.bsky.social
Out-of-order HTML patching, another proposal from TPAC, lets HTML be presented non-linearly, and a single file can update multiple parts of the page.

Would this feature be useful to you?
November 19, 2025 at 4:10 PM
Reposted by Alexander Lehner
fridayfrontend.com
Simple One-Time Passcode Inputs: "I have good news! You can ship a fully functional OTP input today without any CSS hacks or JavaScript frameworks. All you need is some #HTML." #a11y cloudfour.com/thinks/simpl...
Simple One-Time Passcode Inputs
Fully functional OTP entry may be easier than you think.
cloudfour.com
November 18, 2025 at 6:03 PM
Reposted by Alexander Lehner
aardrian.bsky.social
Hey! @lflegal.bsky.social, @rejinae.bsky.social, and @chanceyfleet.bsky.social gathered 36 authors to write about ethics in digital accessibility.

Chapters, authors (I’m one of them), pre-order:
www.routledge.com/Digital-Acce...

Out 26 March 2026.

#DigitalAccessibilityEthics #accessibility #a11y
Book cover, “Digital Accessibility Ethics: Disability Inclusion in All Things Tech” set in blue text above a painting featuring bright arcs of yellow, orange, blue, turquoise, pink, and purple; the lower half of these colors show abstract figures, circles, and building-like shapes and the text “Edited by Lainey Feingold, Reginé Gilbert, Chancey Fleet.”
November 12, 2025 at 3:32 PM
Reposted by Alexander Lehner
bell.bz
posted this 6 years ago and it’s still relevant
A four cell image of a dude holding a dog like a baby with a sad looking cat in the background. The shot zooms in on the cat as the cells progress. The first labels the person as developers and the dog as developer experience. In the third cell, the cat is labelled as users trying to load the website you built.
November 15, 2025 at 10:12 AM
alexlehner86.bsky.social
Congrats Mozilla 🥳🥳🥳
November 14, 2025 at 8:47 PM
Reposted by Alexander Lehner
localghost.dev
This is one of my biggest gripes with AI generated code. People don't understand what they're committing and that's so dangerous. #ffconf with @jesslynnrose.bsky.social & @edaeren.bsky.social
Jess and Eda in front of a slide that says "Code you did not write is code you do not understand. You cannot maintain code you do not understand."
November 14, 2025 at 3:58 PM
Reposted by Alexander Lehner
sarasoueidan.com
Today is a good day to be proud of all the progress you've made. 🌟
November 12, 2025 at 5:30 AM
Reposted by Alexander Lehner
piccalil.li
The majority of us are a bunch of self taught people with rather spotty knowledge and that's fine! Kilian (also self taught) is here to share some of the computer science fundamentals you probably are missing with the aim to improve your code in the long term.

piccalil.li/blog/program...
Programming principles for self taught front-end developers
The majority of us are a bunch of self taught people with rather spotty knowledge and that's fine! Kilian (also self taught) is here to share some of the computer science fundamentals you probably are...
piccalil.li
November 11, 2025 at 11:36 AM
Reposted by Alexander Lehner
fridayfrontend.com
Staggered Animation with #CSS sibling-* Functions: "This post covers a demo where selecting an item causes the preceding and succeeding items to disappear sequentially from the outside." frontendmasters.com/blog/stagger...
Staggered Animation with CSS sibling-* Functions
The new CSS sibling-index() (and -count()) functions are perfect for staggered timing affects. This goes a little step further staggering both before and after a selected element.
frontendmasters.com
November 11, 2025 at 6:02 PM
Reposted by Alexander Lehner
webdesignmuseum.org
On November 9, 2004, Mozilla Corporation released a multiplatform web browser, Firefox 1.0.

Firefox gained major popularity among users and exceeded 1 billion downloads between 2004 and 2009.

#WebDesignHistory
Web browser Firefox 1.0 in 2004
November 9, 2025 at 5:02 PM
Reposted by Alexander Lehner
fridayfrontend.com
Magnificent SVGs With  And #CSS Custom Properties: "SVG is one of those web technologies that’s both elegant and, at times, infuriating. In this article Andy Clarke explains his technique for animating #SVG elements that are hidden in the Shadow DOM." www.smashingmagazine.com/2025/11/smas...
Smashing Animations Part 6: Magnificent SVGs With <use> And CSS Custom Properties — Smashing Magazine
SVG is one of those web technologies that’s both elegant and, at times, infuriating. In this article, pioneering author and web designer Andy Clarke explains his technique for animating SVG elements…
www.smashingmagazine.com
November 10, 2025 at 6:01 PM
alexlehner86.bsky.social
Absolute horror! 😨
cait.bsky.social cait (and adonis) @cait.bsky.social · 14d
a few months ago I said "having generative AI handle absolutely anything with regards to healthcare is a nightmare and should be banned" and a bunch of people made fun of me and called me stupid. anyways,
r/ExpectationVsReality u/Additional-Simple858 • 3d Join Al 'doctor' said my back pain is depression, not a slipped disc. Now physical therapy won't get approved. Al Expectation We are reviewing claim #& submitted on 09/28/2025. Our records indicate the claim was filed under diagnosis code F32.9 (Depressive disorder, unspecified), while the corresponding prescription and referral history list treatment for lumbar disc herniation (back pain). Re: Incorrect Diagnosis in Record Hi Thank you for reaching out. We have reviewed your visit documentation and can confirm that the notes in question were generated using our Al scribe system. It appears the Al tool assigned diagnosis code F32.9 (Depressive disorder, unspecified), while your visit notes and treatment plan reference lumbar disc herniation (back pain). Per compliance policy, certain Al-generated fields cannot be manually updated by clinic staff and require vendor correction. We have escalated this to our vendor support team and opened ticket # . We'll notify you once we receive confirmation or correction from the vendor.
November 10, 2025 at 4:17 PM
alexlehner86.bsky.social
So hyped for this! Bye bye clunky view encapsulation with custom attributes in Angular! Say hello to elegant CSS scoping that keeps the DOM clean and more readable 🥰
#webdev #css #interoperability
November 8, 2025 at 3:55 PM
Reposted by Alexander Lehner
fridayfrontend.com
Inlining Critical #CSS: Does It Make Your Website Faster? "Learn what critical CSS is, how to inline it to improve page load #performance, and understand the trade-offs before implementing it on your website." www.debugbear.com/blog/critica...
Inlining Critical CSS: Does It Make Your Website Faster? | DebugBear
Learn what critical CSS is, how to inline it to improve page load performance, and understand the trade-offs before implementing it on your website.
www.debugbear.com
November 7, 2025 at 6:03 PM
Reposted by Alexander Lehner
nerdy.dev
a new #CSS enters the ring

try it
codepen.io/argyleink/pe...

source
github.com/argyleink/cs...
November 7, 2025 at 4:37 AM
Reposted by Alexander Lehner
piccalil.li
Declan Chidlow here with some really practical uses of view transitions, along with some of the stuff that will trip you up, with guidance to help you navigate that.

piccalil.li/blog/some-pr...
Some practical examples of view transitions to elevate your UI
Declan Chidlow here with some really practical uses of view transitions, along with some of the stuff that will trip you up, with guidance to help you navigate that.
piccalil.li
November 6, 2025 at 12:10 PM
Reposted by Alexander Lehner
fridayfrontend.com
I Built the Same App 10 Times: "I needed to choose a framework for a mobile-first app, comparing Next.js, SolidStart, SvelteKit, Nuxt, and more. The measurements revealed dramatic differences in bundle sizes, #performance, and the real cost of framework choices." www.lorenstew.art/blog/10-kanb...
I Built the Same App 10 Times: Evaluating Frameworks for Mobile Performance | Loren Stewart
I needed to choose a framework for a mobile-first app at work. I started comparing Next.js, SolidStart, and SvelteKit, then expanded to 10 frameworks. The measurements revealed dramatic differences…
www.lorenstew.art
November 6, 2025 at 6:02 PM
Reposted by Alexander Lehner
utilitybend.com
Love this! CSS @starting-style debugging is available in Chrome DevTools by @bram.us www.bram.us/2025/10/21/c...
CSS @starting-style debugging is available in Chrome DevTools!
I built something that I needed into DevTools: debugging support for CSS @starting-style rules.
www.bram.us
November 5, 2025 at 7:44 AM
Reposted by Alexander Lehner
ishadeed.com
✍️ New Article: Use Cases for Field Sizing

A quick look at field-sizing and where it can be used. I hope this will land in Firefox and Safari soon. The good thing? We can use it as an enhancement.

🔗 ishadeed.com/article/fiel...
November 1, 2025 at 6:27 AM
Reposted by Alexander Lehner
sarasoueidan.com
📰 W3C Web Content Accessibility Guidelines (WCAG) 2.2 is now approved as ISO/IEC international standard

www.w3.org/press-releas...
W3C Web Content Accessibility Guidelines 2.2 approved as ISO/IEC international standard
WCAG 2.2 is now ISO/IEC 40500:2025. This standard enables more countries to formally adopt WCAG 2.2. ISO/IEC 40500:2025 is free from the ISO website. Supporting resources and translations are free fro...
www.w3.org
October 31, 2025 at 1:35 PM