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.
Reposted by Jon Kuperman
TypeScript 6.0 Beta is out 🎉
🔶 Temporal
🔶 Map#getOrInsert
🔶 RegExp.escape
🔶 #/ prefix for Package Imports
New defaults!
🔶 --target=ES2025
🔶 "use strict"
🔷 --strict
Deprecations!
🗑️ baseUrl, outFile
🗑️ import assertions
🗑️ `module` namespaces
🗑️ module: amd
🗑️ moduleResolution: node
🗑️ target: ES5
🔶 Temporal
🔶 Map#getOrInsert
🔶 RegExp.escape
🔶 #/ prefix for Package Imports
New defaults!
🔶 --target=ES2025
🔶 "use strict"
🔷 --strict
Deprecations!
🗑️ baseUrl, outFile
🗑️ import assertions
🗑️ `module` namespaces
🗑️ module: amd
🗑️ moduleResolution: node
🗑️ target: ES5
TypeScript 6.0 beta is now published!
This release brings
- inference improvements for functions
- updates to package.json 'imports'
- the Temporal APIs
- alignments for the upcoming TypeScript 7.0
- & more!
Try it today!
devblogs.microsoft.com/typescript/a...
This release brings
- inference improvements for functions
- updates to package.json 'imports'
- the Temporal APIs
- alignments for the upcoming TypeScript 7.0
- & more!
Try it today!
devblogs.microsoft.com/typescript/a...
Announcing TypeScript 6.0 Beta - TypeScript
Today we are announcing the beta release of TypeScript 6.0! To get started using the beta, you can get it through npm with the following command: npm install -D typescript@beta TypeScript 6.0 is a uni...
devblogs.microsoft.com
February 11, 2026 at 8:10 PM
TypeScript 6.0 Beta is out 🎉
🔶 Temporal
🔶 Map#getOrInsert
🔶 RegExp.escape
🔶 #/ prefix for Package Imports
New defaults!
🔶 --target=ES2025
🔶 "use strict"
🔷 --strict
Deprecations!
🗑️ baseUrl, outFile
🗑️ import assertions
🗑️ `module` namespaces
🗑️ module: amd
🗑️ moduleResolution: node
🗑️ target: ES5
🔶 Temporal
🔶 Map#getOrInsert
🔶 RegExp.escape
🔶 #/ prefix for Package Imports
New defaults!
🔶 --target=ES2025
🔶 "use strict"
🔷 --strict
Deprecations!
🗑️ baseUrl, outFile
🗑️ import assertions
🗑️ `module` namespaces
🗑️ module: amd
🗑️ moduleResolution: node
🗑️ target: ES5
just got the weirdest craving to play world of warcraft
February 12, 2026 at 2:24 PM
just got the weirdest craving to play world of warcraft
@ryansolid.bsky.social I fell a bit behind on the ideas for new reactivity models in @solidjs.com - are there any good resources I can use to catch back up?
February 12, 2026 at 11:56 AM
@ryansolid.bsky.social I fell a bit behind on the ideas for new reactivity models in @solidjs.com - are there any good resources I can use to catch back up?
The way my team looked at me when I came down from the snack area with only an apple and a pear 😂
February 11, 2026 at 3:52 PM
The way my team looked at me when I came down from the snack area with only an apple and a pear 😂
I've been having so much fun hacking on infinitesudoku.com
A sudoku app where, in order to get a hint, you have to complete a game of mini sudoku!
A sudoku app where, in order to get a hint, you have to complete a game of mini sudoku!
Infinite Sudoku
A beautiful, endlessly replayable Sudoku game
infinitesudoku.com
February 10, 2026 at 9:46 PM
I've been having so much fun hacking on infinitesudoku.com
A sudoku app where, in order to get a hint, you have to complete a game of mini sudoku!
A sudoku app where, in order to get a hint, you have to complete a game of mini sudoku!
Poetry can be used to jailbreak frontier LLMs
Shared with me by @ashley-c.bsky.social
arxiv.org/html/2511.15...
Shared with me by @ashley-c.bsky.social
arxiv.org/html/2511.15...
Adversarial Poetry as a Universal Single-Turn Jailbreak Mechanism in Large Language Models
arxiv.org
February 10, 2026 at 12:29 PM
Poetry can be used to jailbreak frontier LLMs
Shared with me by @ashley-c.bsky.social
arxiv.org/html/2511.15...
Shared with me by @ashley-c.bsky.social
arxiv.org/html/2511.15...
Reposted by Jon Kuperman
I don't know about y'all but cold, dark, rainy London days get me super motivated to go to the gym 😭
February 6, 2026 at 4:40 PM
I don't know about y'all but cold, dark, rainy London days get me super motivated to go to the gym 😭
*me, trying to read British news*
“Labour members of Parliament describe the mood in the governing party as febrile and mutinous”
Well great, now I need to go buy a dictionary…
“Labour members of Parliament describe the mood in the governing party as febrile and mutinous”
Well great, now I need to go buy a dictionary…
February 5, 2026 at 10:26 AM
*me, trying to read British news*
“Labour members of Parliament describe the mood in the governing party as febrile and mutinous”
Well great, now I need to go buy a dictionary…
“Labour members of Parliament describe the mood in the governing party as febrile and mutinous”
Well great, now I need to go buy a dictionary…
I’ve read more arxiv.org articles in the past 8 months than the rest of my entire life.
arXiv.org e-Print archive
arxiv.org
February 4, 2026 at 5:46 PM
I’ve read more arxiv.org articles in the past 8 months than the rest of my entire life.
I never understood spaghetti code being an insult… who doesn’t like spaghetti!?
February 4, 2026 at 11:54 AM
I never understood spaghetti code being an insult… who doesn’t like spaghetti!?
Getting emails from ai bots offering to help with my work. Strange times.
February 3, 2026 at 1:52 PM
Getting emails from ai bots offering to help with my work. Strange times.
Reposted by Jon Kuperman
Take me down to the Parallax city where the far moves slow and the near moves quickly
February 1, 2026 at 3:40 PM
Take me down to the Parallax city where the far moves slow and the near moves quickly
Very proud of this. In addition to doing two Spanish lessons per week, I've been using a video learning service. I normally watch 1-2 hours per month of educational videos but, in January, I watched 14 hours!
January 31, 2026 at 7:06 PM
Very proud of this. In addition to doing two Spanish lessons per week, I've been using a video learning service. I normally watch 1-2 hours per month of educational videos but, in January, I watched 14 hours!
Has anyone tried making tea with hot milk and cold water?
January 27, 2026 at 3:02 PM
Has anyone tried making tea with hot milk and cold water?
my muted words list made me miss this tragic story www.bbc.co.uk/news/article...
Thousands in San Francisco mourn beloved albino alligator, Claude
California names a street after reptile Claude, who won millions of hearts with his albinism.
www.bbc.co.uk
January 26, 2026 at 11:24 PM
my muted words list made me miss this tragic story www.bbc.co.uk/news/article...
I think after 4 months of hard work I’m finally entering the fun part of learning a new language
January 26, 2026 at 11:34 AM
I think after 4 months of hard work I’m finally entering the fun part of learning a new language
anyone heard of this new game called sudoku?
January 22, 2026 at 10:26 PM
anyone heard of this new game called sudoku?
I enjoyed this interview youtu.be/BbIaYFHxW3Y?...
Hassabis on an AI Shift Bigger Than Industrial Age
YouTube video by Bloomberg Live
youtu.be
January 21, 2026 at 12:13 PM
I enjoyed this interview youtu.be/BbIaYFHxW3Y?...
just had my code reviewed by a human being 😬
January 20, 2026 at 4:11 PM
just had my code reviewed by a human being 😬
Reposted by Jon Kuperman
💥 I did a drawing that breaks down Transformers in AI
Spent a good amount of time on this one, breaking down concepts in a way that someone new to the subject could come away with basic high-level understanding. I hope it's useful!
Spent a good amount of time on this one, breaking down concepts in a way that someone new to the subject could come away with basic high-level understanding. I hope it's useful!
January 20, 2026 at 2:02 PM
💥 I did a drawing that breaks down Transformers in AI
Spent a good amount of time on this one, breaking down concepts in a way that someone new to the subject could come away with basic high-level understanding. I hope it's useful!
Spent a good amount of time on this one, breaking down concepts in a way that someone new to the subject could come away with basic high-level understanding. I hope it's useful!
Reposted by Jon Kuperman
Have thoroughly enjoyed working with Jon on JS shenanigans ever since @threepointone.bsky.social leant over and loudly whispered "you should hire this guy" at a London pub.
Jon has talked about his dog a lot. Still waiting to meet this chunky boi.
Jon has talked about his dog a lot. Still waiting to meet this chunky boi.
January 16, 2026 at 2:08 PM
Have thoroughly enjoyed working with Jon on JS shenanigans ever since @threepointone.bsky.social leant over and loudly whispered "you should hire this guy" at a London pub.
Jon has talked about his dog a lot. Still waiting to meet this chunky boi.
Jon has talked about his dog a lot. Still waiting to meet this chunky boi.