Jon Kuperman
@jonkuperman.com
TC39 - Signals - Source Maps - TS/JS @Bloomberg. Previously I did web at Adobe and Twitter.
Opinions are my own.
Opinions are my own.
wait is this legal in other states
January 15, 2026 at 9:42 PM
wait is this legal in other states
Such a great product. I’m very surprised at how the stock has done since IPO
January 15, 2026 at 11:32 AM
Such a great product. I’m very surprised at how the stock has done since IPO
Reposted by Jon Kuperman
wrote some things I've been thinking about ai
... and it ended up feeling very personal
roe.dev/blog/the-go...
... and it ended up feeling very personal
roe.dev/blog/the-go...
The golden thread
AI can serve us as a force multiplier, augmenting our own agency and making the most of our own effort, hard work and value. Not by replacing it.
roe.dev
January 14, 2026 at 11:09 PM
wrote some things I've been thinking about ai
... and it ended up feeling very personal
roe.dev/blog/the-go...
... and it ended up feeling very personal
roe.dev/blog/the-go...
Reposted by Jon Kuperman
The speaker line up for #SotB26 is announced.
@bram.us
@cassiecodes.bsky.social
@kitation.co.uk
Fiona Safari
@jason-williams.co.uk
@mikehall314.bsky.social
@zachleat.com
It will be a full day of very interesting sessions and we can’t wait to see you all there!
2026.stateofthebrowser.com/speakers/
@bram.us
@cassiecodes.bsky.social
@kitation.co.uk
Fiona Safari
@jason-williams.co.uk
@mikehall314.bsky.social
@zachleat.com
It will be a full day of very interesting sessions and we can’t wait to see you all there!
2026.stateofthebrowser.com/speakers/
Speakers | State of the Browser
Here is the announced list of speakers for 2026's conference.
2026.stateofthebrowser.com
January 12, 2026 at 11:26 AM
The speaker line up for #SotB26 is announced.
@bram.us
@cassiecodes.bsky.social
@kitation.co.uk
Fiona Safari
@jason-williams.co.uk
@mikehall314.bsky.social
@zachleat.com
It will be a full day of very interesting sessions and we can’t wait to see you all there!
2026.stateofthebrowser.com/speakers/
@bram.us
@cassiecodes.bsky.social
@kitation.co.uk
Fiona Safari
@jason-williams.co.uk
@mikehall314.bsky.social
@zachleat.com
It will be a full day of very interesting sessions and we can’t wait to see you all there!
2026.stateofthebrowser.com/speakers/
Reposted by Jon Kuperman
Highly recommended, fascinating to watch real-time Bluesky/atproto dashboard ->
Made an AT Protocol health dashboard atproto-health.pages.dev
AT Protocol Health Dashboard
Real-time health metrics for the AT Protocol ecosystem
atproto-health.pages.dev
January 5, 2026 at 3:25 PM
Highly recommended, fascinating to watch real-time Bluesky/atproto dashboard ->
It's a scary time to be a dev but it's also a really thrilling time to be a dev
January 5, 2026 at 1:29 PM
It's a scary time to be a dev but it's also a really thrilling time to be a dev
Reposted by Jon Kuperman
3 years in a row I posted about Temporal on Jan 1st.
Now the year has come* I of course forgot.
* Not stage 4 yet, but all signs point to this year and Temporal has shipped in Firefox and coming in Chrome 144.
Now the year has come* I of course forgot.
* Not stage 4 yet, but all signs point to this year and Temporal has shipped in Firefox and coming in Chrome 144.
January 5, 2026 at 9:02 AM
3 years in a row I posted about Temporal on Jan 1st.
Now the year has come* I of course forgot.
* Not stage 4 yet, but all signs point to this year and Temporal has shipped in Firefox and coming in Chrome 144.
Now the year has come* I of course forgot.
* Not stage 4 yet, but all signs point to this year and Temporal has shipped in Firefox and coming in Chrome 144.
Made an AT Protocol health dashboard atproto-health.pages.dev
AT Protocol Health Dashboard
Real-time health metrics for the AT Protocol ecosystem
atproto-health.pages.dev
January 4, 2026 at 9:05 PM
Made an AT Protocol health dashboard atproto-health.pages.dev
I'm ready to make a late dinner and start getting ready for IT'S WHAT TIME!?
*reopens work laptop*
*reopens work laptop*
January 2, 2026 at 3:59 PM
I'm ready to make a late dinner and start getting ready for IT'S WHAT TIME!?
*reopens work laptop*
*reopens work laptop*
I'm not saying I'm becoming more European but I do now have a separate cooking and eating olive oil
January 1, 2026 at 3:16 PM
I'm not saying I'm becoming more European but I do now have a separate cooking and eating olive oil
Reposted by Jon Kuperman
Finished two retrospective blog posts on the journey of require(esm) before 2025 ends:
joyeecheung.github.io/blog/2025/12...
joyeecheung.github.io/blog/2025/12...
joyeecheung.github.io/blog/2025/12...
joyeecheung.github.io/blog/2025/12...
require(esm) in Node.js: from experiment to stability
More than a year ago, I set out to revive require(esm) in Node.js and landed an experimental implementation. After a lot of iteration and battle-testing, require(esm) is now unflagged across all suppo
joyeecheung.github.io
December 30, 2025 at 7:04 PM
Finished two retrospective blog posts on the journey of require(esm) before 2025 ends:
joyeecheung.github.io/blog/2025/12...
joyeecheung.github.io/blog/2025/12...
joyeecheung.github.io/blog/2025/12...
joyeecheung.github.io/blog/2025/12...
Reposted by Jon Kuperman
Facebook's Static Hermes is kind of incredible. It can compile JavaScript into C, which is then optimized into native machine code.
I just compiled the Less.js source code into a C library. Then I called it from Rust as a native Parcel plugin (no Node). Wild. 👨🔬
devongovett.me/blog/static-...
I just compiled the Less.js source code into a C library. Then I called it from Rust as a native Parcel plugin (no Node). Wild. 👨🔬
devongovett.me/blog/static-...
How to compile JavaScript to C with Static Hermes
Lately, I've been working on porting more of Parcel to Rust, and investigating ways to embed JS-based plugins. This post describes how I used Static Hermes to compile Less.js to a native C library tha...
devongovett.me
December 29, 2025 at 10:30 PM
Facebook's Static Hermes is kind of incredible. It can compile JavaScript into C, which is then optimized into native machine code.
I just compiled the Less.js source code into a C library. Then I called it from Rust as a native Parcel plugin (no Node). Wild. 👨🔬
devongovett.me/blog/static-...
I just compiled the Less.js source code into a C library. Then I called it from Rust as a native Parcel plugin (no Node). Wild. 👨🔬
devongovett.me/blog/static-...
I cannot keep up drinking with the English and I cannot keep up eating with the Spanish.
December 26, 2025 at 8:35 PM
I cannot keep up drinking with the English and I cannot keep up eating with the Spanish.
look at this cool pic of a bird i took
December 22, 2025 at 11:23 AM
look at this cool pic of a bird i took
when you just finished the gym but ur fav song just came on
December 19, 2025 at 5:38 PM
when you just finished the gym but ur fav song just came on
Average Copilot experience
December 17, 2025 at 11:29 AM
Average Copilot experience
Reposted by Jon Kuperman
WinterTC's Minimum Common Web API standard is now officially published as ECMA-429, Edition 1 . To many more editions!
Thanks @jasnell.me, @andreubotella.com, @akiro.se, @littledan.dev and everyone else that was involved in making this happen.
🎉
Thanks @jasnell.me, @andreubotella.com, @akiro.se, @littledan.dev and everyone else that was involved in making this happen.
🎉
December 12, 2025 at 3:33 PM
WinterTC's Minimum Common Web API standard is now officially published as ECMA-429, Edition 1 . To many more editions!
Thanks @jasnell.me, @andreubotella.com, @akiro.se, @littledan.dev and everyone else that was involved in making this happen.
🎉
Thanks @jasnell.me, @andreubotella.com, @akiro.se, @littledan.dev and everyone else that was involved in making this happen.
🎉
Remember folks, when a British person asks "You watching Traitors?" chances are they are a spy sent from the UK TV Licence investigations unit
December 11, 2025 at 10:05 PM
Remember folks, when a British person asks "You watching Traitors?" chances are they are a spy sent from the UK TV Licence investigations unit
Disney and I have just invested a combine $1,000,000,024 in OpenAI.
December 11, 2025 at 2:09 PM
Disney and I have just invested a combine $1,000,000,024 in OpenAI.
Reposted by Jon Kuperman
Made a site comparing the sizes of living things :)
The great Julius Csotonyi spent 5 months painting over 60 illustrations for the site, no ai used
> neal.fun/size-of-life/
The great Julius Csotonyi spent 5 months painting over 60 illustrations for the site, no ai used
> neal.fun/size-of-life/
December 10, 2025 at 4:03 PM
Made a site comparing the sizes of living things :)
The great Julius Csotonyi spent 5 months painting over 60 illustrations for the site, no ai used
> neal.fun/size-of-life/
The great Julius Csotonyi spent 5 months painting over 60 illustrations for the site, no ai used
> neal.fun/size-of-life/
I’m team nohello.net/en/
That being said, I like to start off with something vague and suspenseful, to set the mood!
That being said, I like to start off with something vague and suspenseful, to set the mood!
December 10, 2025 at 3:12 PM
I’m team nohello.net/en/
That being said, I like to start off with something vague and suspenseful, to set the mood!
That being said, I like to start off with something vague and suspenseful, to set the mood!
You know things are getting serious when the principle engineer opens up microsoft paint
December 9, 2025 at 11:30 AM
You know things are getting serious when the principle engineer opens up microsoft paint
This feels like bad UX from WhatsApp when you finish a call from a number not in your contacts
December 7, 2025 at 8:22 PM
This feels like bad UX from WhatsApp when you finish a call from a number not in your contacts
US tipping culture feels out of control. So many restaurants have a self ordering iPad, you have to go collect the food yourself and they default to a 25% tip. Am I out of touch?
December 6, 2025 at 8:28 PM
US tipping culture feels out of control. So many restaurants have a self ordering iPad, you have to go collect the food yourself and they default to a 25% tip. Am I out of touch?