Philip Jägenstedt
@foolip.org
Long live the web! Engineer on Google Chrome, ex-Opera.
Reposted by Philip Jägenstedt
The State of HTML 2026 survey is now open!
survey.devographics.com/en-US/survey...
survey.devographics.com/en-US/survey...
State of HTML 2026
Take the State of HTML survey
survey.devographics.com
October 5, 2026 at 8:08 AM
The State of HTML 2026 survey is now open!
survey.devographics.com/en-US/survey...
survey.devographics.com/en-US/survey...
Reposted by Philip Jägenstedt
GitHub just finished ripping styled-components out of github.com. Result: 55% less time to server-render a page, 25% faster component init.
CSS-in-JS makes you pay for styles twice: collecting them on the server, running JS on the client.
Static CSS is *always* more efficient.
Ship CSS.
CSS-in-JS makes you pay for styles twice: collecting them on the server, running JS on the client.
Static CSS is *always* more efficient.
Ship CSS.
GitHub.com has fully moved off CSS-in-JS to CSS Modules, resulting in 55% less server-side render time and 25% faster component init.
https://github.blog/engineering/architecture-optimization/improving-site-performance-by-shipping-more-css/
https://github.blog/engineering/architecture-optimization/improving-site-performance-by-shipping-more-css/
Improving site performance by shipping more CSS
How we fully migrated github.com away from CSS-in-JS.
github.blog
October 5, 2026 at 2:18 AM
GitHub just finished ripping styled-components out of github.com. Result: 55% less time to server-render a page, 25% faster component init.
CSS-in-JS makes you pay for styles twice: collecting them on the server, running JS on the client.
Static CSS is *always* more efficient.
Ship CSS.
CSS-in-JS makes you pay for styles twice: collecting them on the server, running JS on the client.
Static CSS is *always* more efficient.
Ship CSS.
Happy kanelbullens dag to all who celebrate! 🇸🇪
October 4, 2026 at 12:33 PM
Happy kanelbullens dag to all who celebrate! 🇸🇪
Reposted by Philip Jägenstedt
Always nice to do updates like this one 😊
Yes, CSS `light-dark()` with `` values is now available in all major browser engines.
Check brm.us/light-dark-i... to get the details.
Yes, CSS `light-dark()` with `
Check brm.us/light-dark-i... to get the details.
September 17, 2026 at 9:01 AM
Always nice to do updates like this one 😊
Yes, CSS `light-dark()` with `` values is now available in all major browser engines.
Check brm.us/light-dark-i... to get the details.
Yes, CSS `light-dark()` with `
Check brm.us/light-dark-i... to get the details.
Reposted by Philip Jägenstedt
On this day, it's crucial to remember the radical importance of "wherever you get your podcasts", as explained by @anildash.com
September 30, 2026 at 6:43 PM
On this day, it's crucial to remember the radical importance of "wherever you get your podcasts", as explained by @anildash.com
Reposted by Philip Jägenstedt
example.com just changed for the first time since 2013, and IANA replied to my email asking why.
Here's the full reply: www.oliverdunk.com/2026/09/30/i...
Here's the full reply: www.oliverdunk.com/2026/09/30/i...
October 1, 2026 at 11:01 AM
example.com just changed for the first time since 2013, and IANA replied to my email asking why.
Here's the full reply: www.oliverdunk.com/2026/09/30/i...
Here's the full reply: www.oliverdunk.com/2026/09/30/i...
Reposted by Philip Jägenstedt
Welcome to the new PLC Organization @plcred.org
“a small Swiss Association (‘Verein’) which provides open network identifier infrastructure. It serves as a neutral steward for the Public Ledger of Credentials (PLC) system” plcred.org
“a small Swiss Association (‘Verein’) which provides open network identifier infrastructure. It serves as a neutral steward for the Public Ledger of Credentials (PLC) system” plcred.org
Hello World from the PLC organization (plcred.org)!
The org was soft-announced back in March at AtmosphereConf. We've been working through logistics step by step and now have a public web presence we can point to.
The org was soft-announced back in March at AtmosphereConf. We've been working through logistics step by step and now have a public web presence we can point to.
First steps of the PLC organization
blog.plcred.org
September 28, 2026 at 6:14 PM
Welcome to the new PLC Organization @plcred.org
“a small Swiss Association (‘Verein’) which provides open network identifier infrastructure. It serves as a neutral steward for the Public Ledger of Credentials (PLC) system” plcred.org
“a small Swiss Association (‘Verein’) which provides open network identifier infrastructure. It serves as a neutral steward for the Public Ledger of Credentials (PLC) system” plcred.org
Reposted by Philip Jägenstedt
Reposted by Philip Jägenstedt
Oh this is nice!
Can even bring back IE data if you really, really have to.
Can even bring back IE data if you really, really have to.
🆕 Customize MDN's browser compat tables!
Press ⚙️ Settings on any compat table to choose which browsers and engines you see, and hide the ones you don't need.
Your picks are saved in your browser.
Try it 👇
developer.mozilla.org/en-US/docs/W...
Press ⚙️ Settings on any compat table to choose which browsers and engines you see, and hide the ones you don't need.
Your picks are saved in your browser.
Try it 👇
developer.mozilla.org/en-US/docs/W...
September 25, 2026 at 4:28 PM
Oh this is nice!
Can even bring back IE data if you really, really have to.
Can even bring back IE data if you really, really have to.
Reposted by Philip Jägenstedt
Took a bit of inspiration from npmx and added a chart to developer-signals.dev showing total upvotes over time
This one's for the Temporal API. I love how you can see little surges in developer interest, first in December and again this month.
This one's for the Temporal API. I love how you can see little surges in developer interest, first in December and again this month.
September 23, 2026 at 1:24 AM
Took a bit of inspiration from npmx and added a chart to developer-signals.dev showing total upvotes over time
This one's for the Temporal API. I love how you can see little surges in developer interest, first in December and again this month.
This one's for the Temporal API. I love how you can see little surges in developer interest, first in December and again this month.
This is the best explanation of the interplay of specs, tests, and implementations that I've read.
The point of both specs and tests is interoperable implementations, but that doesn't mean that implementations are always right when they agree.
The point of both specs and tests is interoperable implementations, but that doesn't mean that implementations are always right when they agree.
My colleague @atbrakhi.bsky.social wrote a nice, cleverly titled post based on a very short exchange we had on Instagram the other day...
www.atbrakhi.dev/blog/browser...
www.atbrakhi.dev/blog/browser...
Browsers Situationship: When Browsers Agree but the Spec Doesn’t | Atbrakhi's Blog
What came first: browsers or specifications? Why are specifications important? Why do we sometimes change a specification instead of browsers? What matters most: the specification or the user experien...
www.atbrakhi.dev
September 23, 2026 at 10:33 AM
This is the best explanation of the interplay of specs, tests, and implementations that I've read.
The point of both specs and tests is interoperable implementations, but that doesn't mean that implementations are always right when they agree.
The point of both specs and tests is interoperable implementations, but that doesn't mean that implementations are always right when they agree.
Reposted by Philip Jägenstedt
This is a lovely post. I'm quite often asked if people from different browsers argue with each other in CSS meetings. I usually say it's a lot more "huh... yeah that's not good ... how do we fix it?" That's especially true when it comes to the sort of situations described here.
My colleague @atbrakhi.bsky.social wrote a nice, cleverly titled post based on a very short exchange we had on Instagram the other day...
www.atbrakhi.dev/blog/browser...
www.atbrakhi.dev/blog/browser...
Browsers Situationship: When Browsers Agree but the Spec Doesn’t | Atbrakhi's Blog
What came first: browsers or specifications? Why are specifications important? Why do we sometimes change a specification instead of browsers? What matters most: the specification or the user experien...
www.atbrakhi.dev
September 23, 2026 at 8:04 AM
This is a lovely post. I'm quite often asked if people from different browsers argue with each other in CSS meetings. I usually say it's a lot more "huh... yeah that's not good ... how do we fix it?" That's especially true when it comes to the sort of situations described here.
Reposted by Philip Jägenstedt
![Comic. [Person with long hair pointing to diagram with Tyrannosaurus Rex standing next to a person.] PERSON: We now believe the primary prey of Tyrannosaurus Rex was these humans who kept standing next to it for scale.](https://cdn.bsky.app/img/feed_thumbnail/plain/did:plc:cz73r7iyiqn26upot4jtjdhk/bafkreih526pxolmi4pgqdcdu435uhkrrldhpwq6rrsnk4hfs6dskbe5r7e)
September 22, 2026 at 7:39 PM
Reposted by Philip Jägenstedt
how did I make it so long without knowing about 乖乖
Kuai Kuai culture - Wikipedia
en.wikipedia.org
September 20, 2026 at 9:23 PM
how did I make it so long without knowing about 乖乖
Reposted by Philip Jägenstedt
I want Custom Attributes to exist - think Custom Elements (Web Components) but Attributes.
I've been working on a proposal, specs, and now a polyfill: www.keithcirkel.co.uk/custom-attri...
More coming soon!
I've been working on a proposal, specs, and now a polyfill: www.keithcirkel.co.uk/custom-attri...
More coming soon!
Custom Attributes polyfill
www.keithcirkel.co.uk
September 19, 2026 at 9:53 PM
I want Custom Attributes to exist - think Custom Elements (Web Components) but Attributes.
I've been working on a proposal, specs, and now a polyfill: www.keithcirkel.co.uk/custom-attri...
More coming soon!
I've been working on a proposal, specs, and now a polyfill: www.keithcirkel.co.uk/custom-attri...
More coming soon!
Reposted by Philip Jägenstedt
Reposted by Philip Jägenstedt
Found a conventional use for atproto (replacing high school state associations/athletic conference/school sports websites) the other day and built a spec because I couldn't help myself.
it's live but I'll share a blog post about it before sharing
it's live but I'll share a blog post about it before sharing
August 8, 2026 at 10:33 PM
Found a conventional use for atproto (replacing high school state associations/athletic conference/school sports websites) the other day and built a spec because I couldn't help myself.
it's live but I'll share a blog post about it before sharing
it's live but I'll share a blog post about it before sharing
Reposted by Philip Jägenstedt
Might be one of my more controversial posts: "The case against JPEG XL"
Link: giannirosato.com/blog/post/ca...
🫡
#compression #jpegxl #av1
Link: giannirosato.com/blog/post/ca...
🫡
#compression #jpegxl #av1
The case against JPEG XL | Gianni Rosato
Investigating JPEG XL's place as a Web image codec.
giannirosato.com
September 14, 2026 at 1:29 AM
Might be one of my more controversial posts: "The case against JPEG XL"
Link: giannirosato.com/blog/post/ca...
🫡
#compression #jpegxl #av1
Link: giannirosato.com/blog/post/ca...
🫡
#compression #jpegxl #av1
Reposted by Philip Jägenstedt
Can we please stop doing this? I made a comic about it and everything!
September 15, 2026 at 11:14 AM
Can we please stop doing this? I made a comic about it and everything!
Reposted by Philip Jägenstedt
I'm worried about the web. I don't want to live in a world where most users of internet-connected devices consume their information and accomplish their tasks via a chatbot interface.
Patrick - I'm worried about the web
I'm worried about the web. I don't want to live in a world where most users of internet-connected devices consume their information and accomplish their tasks via a chat bot interface.
patrickbrosset.com
September 15, 2026 at 9:21 AM
I'm worried about the web. I don't want to live in a world where most users of internet-connected devices consume their information and accomplish their tasks via a chatbot interface.
Reposted by Philip Jägenstedt
If you've ever tried using a new web API in TypeScript, you've probably hit this problem:
An API exists. It works in your browser. But TypeScript has no types for it.
The reason is a limitation that TS unfortunately applies to its built-in libs.
BUT, I've created a relatively simple fix 👇
An API exists. It works in your browser. But TypeScript has no types for it.
The reason is a limitation that TS unfortunately applies to its built-in libs.
BUT, I've created a relatively simple fix 👇
September 15, 2026 at 6:13 AM
If you've ever tried using a new web API in TypeScript, you've probably hit this problem:
An API exists. It works in your browser. But TypeScript has no types for it.
The reason is a limitation that TS unfortunately applies to its built-in libs.
BUT, I've created a relatively simple fix 👇
An API exists. It works in your browser. But TypeScript has no types for it.
The reason is a limitation that TS unfortunately applies to its built-in libs.
BUT, I've created a relatively simple fix 👇
Reposted by Philip Jägenstedt
#CSS `progress()` is now baseline! 🥳
I was trying to see if this could be used as a workaround for the lack of typed arithmetic (unit division) in Firefox, and it does work, sort of.
codepen.io/editor/maike...
(And yes I know there's already the `tan2(atan())` trick, but that has its own bugs.)
I was trying to see if this could be used as a workaround for the lack of typed arithmetic (unit division) in Firefox, and it does work, sort of.
codepen.io/editor/maike...
(And yes I know there's already the `tan2(atan())` trick, but that has its own bugs.)
September 1, 2026 at 2:30 PM
#CSS `progress()` is now baseline! 🥳
I was trying to see if this could be used as a workaround for the lack of typed arithmetic (unit division) in Firefox, and it does work, sort of.
codepen.io/editor/maike...
(And yes I know there's already the `tan2(atan())` trick, but that has its own bugs.)
I was trying to see if this could be used as a workaround for the lack of typed arithmetic (unit division) in Firefox, and it does work, sort of.
codepen.io/editor/maike...
(And yes I know there's already the `tan2(atan())` trick, but that has its own bugs.)
Reposted by Philip Jägenstedt
This has been a long slog; getting the web-as-app-store use-case nailed has taken extraordinary care and years of iteration. Congrats to the team!
You should try out microsoftedge.github.io/Demos/pwa-in...! It feels like a huge step forward for web apps.
Kudos to @diekus.bsky.social, Lia Hiscock and others on the Microsoft Edge team driving this!
Explainer: github.com/MicrosoftEdg...
Kudos to @diekus.bsky.social, Lia Hiscock and others on the Microsoft Edge team driving this!
Explainer: github.com/MicrosoftEdg...
Microsoft Edge Demos
microsoftedge.github.io
September 10, 2026 at 6:05 PM
This has been a long slog; getting the web-as-app-store use-case nailed has taken extraordinary care and years of iteration. Congrats to the team!
You should try out microsoftedge.github.io/Demos/pwa-in...! It feels like a huge step forward for web apps.
Kudos to @diekus.bsky.social, Lia Hiscock and others on the Microsoft Edge team driving this!
Explainer: github.com/MicrosoftEdg...
Kudos to @diekus.bsky.social, Lia Hiscock and others on the Microsoft Edge team driving this!
Explainer: github.com/MicrosoftEdg...
Microsoft Edge Demos
microsoftedge.github.io
September 9, 2026 at 9:57 AM
You should try out microsoftedge.github.io/Demos/pwa-in...! It feels like a huge step forward for web apps.
Kudos to @diekus.bsky.social, Lia Hiscock and others on the Microsoft Edge team driving this!
Explainer: github.com/MicrosoftEdg...
Kudos to @diekus.bsky.social, Lia Hiscock and others on the Microsoft Edge team driving this!
Explainer: github.com/MicrosoftEdg...
Reposted by Philip Jägenstedt
@thisismissem.social @divy.zone and I recently went through an exploration of how the browser can help you login to websites with atproto accounts.
We recently presented to the FedID CG and here is a sneak peek in case you couldn't join!
This is early but we'd love your input before we go too far!
We recently presented to the FedID CG and here is a sneak peek in case you couldn't join!
This is early but we'd love your input before we go too far!
September 1, 2026 at 7:08 PM
@thisismissem.social @divy.zone and I recently went through an exploration of how the browser can help you login to websites with atproto accounts.
We recently presented to the FedID CG and here is a sneak peek in case you couldn't join!
This is early but we'd love your input before we go too far!
We recently presented to the FedID CG and here is a sneak peek in case you couldn't join!
This is early but we'd love your input before we go too far!