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.
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?
I love small town airports. Left my hotel at 12, at my gate by 12:28.
December 6, 2025 at 5:31 PM
I love small town airports. Left my hotel at 12, at my gate by 12:28.
Can someone help me make sense of this? I'm reading learning.oreilly.com/library/view... and the very first sentence says:
December 5, 2025 at 3:37 AM
Can someone help me make sense of this? I'm reading learning.oreilly.com/library/view... and the very first sentence says:
Reposted by Jon Kuperman
If you didn’t want me doing it you shouldn’t have named it megamorphic
August 14, 2025 at 2:41 PM
If you didn’t want me doing it you shouldn’t have named it megamorphic
Don't mind me, just hiding my event listeners from the DevTools
November 19, 2025 at 2:41 AM
Don't mind me, just hiding my event listeners from the DevTools
✅ overnight flight
Now just gotta kill *checks watch* 8 hours before I can check into my hotel
Now just gotta kill *checks watch* 8 hours before I can check into my hotel
November 14, 2025 at 11:29 PM
✅ overnight flight
Now just gotta kill *checks watch* 8 hours before I can check into my hotel
Now just gotta kill *checks watch* 8 hours before I can check into my hotel
This is… I mean it’s… I’m not sure where to start finance.yahoo.com/news/coding-...
Coding assistant Cursor raises $2.3bn five months after its previous round
Cursor plans to use the capital to continue developing Composer, the AI model the vibe coding startup released in October.
finance.yahoo.com
November 13, 2025 at 3:09 PM
This is… I mean it’s… I’m not sure where to start finance.yahoo.com/news/coding-...
@jason.energy listening to your Finland Spotify playlist today
November 13, 2025 at 11:06 AM
@jason.energy listening to your Finland Spotify playlist today
This always cracks me up
November 12, 2025 at 4:00 PM
This always cracks me up
This has been such an amazing journey to watch. Huge congratulations (and thanks) to everyone who made this possible!
Node excitement 😉
Congrats to @marcoippolito.dev on making it official: type-stripping in Node 25 is now declared to be stable 🎉
You can run: node index.ts
The capabilities have not changed since Node 24. This is purely a maturity indicator.
Congrats to @marcoippolito.dev on making it official: type-stripping in Node 25 is now declared to be stable 🎉
You can run: node index.ts
The capabilities have not changed since Node 24. This is purely a maturity indicator.
Type stripping is now stable.
Enjoy 🌞
Enjoy 🌞
November 12, 2025 at 10:23 AM
This has been such an amazing journey to watch. Huge congratulations (and thanks) to everyone who made this possible!
Escaping Reactivity Hell & Managing State in React
YouTube video by CascadiaJS
youtu.be
November 11, 2025 at 2:10 PM