James Snell
@jasnell.me
Reposted by James Snell
🔥 NEW BANTER: "When Recursion Crashes Your App: The Async Hooks DoS Nobody Expected"
Your try-catch blocks won't save you.
Your uncaughtException handlers won't fire.
Your server just... dies.
@lucamaraschi and I break down why.
📅 Jan 21st
🔗 streamyard.com/watch/dwZbc7...
Your try-catch blocks won't save you.
Your uncaughtException handlers won't fire.
Your server just... dies.
@lucamaraschi and I break down why.
📅 Jan 21st
🔗 streamyard.com/watch/dwZbc7...
January 16, 2026 at 4:59 PM
🔥 NEW BANTER: "When Recursion Crashes Your App: The Async Hooks DoS Nobody Expected"
Your try-catch blocks won't save you.
Your uncaughtException handlers won't fire.
Your server just... dies.
@lucamaraschi and I break down why.
📅 Jan 21st
🔗 streamyard.com/watch/dwZbc7...
Your try-catch blocks won't save you.
Your uncaughtException handlers won't fire.
Your server just... dies.
@lucamaraschi and I break down why.
📅 Jan 21st
🔗 streamyard.com/watch/dwZbc7...
Reposted by James Snell
We appreciate your patience and understanding as we work to deliver a secure and reliable release.
Updates are now available for the 25.x, 24.x, 22.x, 20.x Node.js release lines to address:
- 3 high severity issues
- 4 medium severity issues
- 1 low severity issue
nodejs.org/en/blog/vuln...
Updates are now available for the 25.x, 24.x, 22.x, 20.x Node.js release lines to address:
- 3 high severity issues
- 4 medium severity issues
- 1 low severity issue
nodejs.org/en/blog/vuln...
Node.js — Tuesday, January 13, 2026 Security Releases
Node.js® is a free, open-source, cross-platform JavaScript runtime environment that lets developers create servers, web apps, command line tools and scripts.
nodejs.org
January 13, 2026 at 2:42 PM
We appreciate your patience and understanding as we work to deliver a secure and reliable release.
Updates are now available for the 25.x, 24.x, 22.x, 20.x Node.js release lines to address:
- 3 high severity issues
- 4 medium severity issues
- 1 low severity issue
nodejs.org/en/blog/vuln...
Updates are now available for the 25.x, 24.x, 22.x, 20.x Node.js release lines to address:
- 3 high severity issues
- 4 medium severity issues
- 1 low severity issue
nodejs.org/en/blog/vuln...
Not surprised in the least.
Breaking NYT:
The Pentagon used a secret aircraft painted to look like a civilian plane in its first boat attack, according to officials briefed on the matter.
The laws of armed conflict forbid combatants from feigning civilian status.
That is a war crime called "perfidy."
The Pentagon used a secret aircraft painted to look like a civilian plane in its first boat attack, according to officials briefed on the matter.
The laws of armed conflict forbid combatants from feigning civilian status.
That is a war crime called "perfidy."
U.S. Attacked Boat With Aircraft That Looked Like a Civilian Plane
www.nytimes.com
January 13, 2026 at 1:06 AM
Not surprised in the least.
ICE is filled with nothing but cowards and thugs.
January 8, 2026 at 2:26 AM
ICE is filled with nothing but cowards and thugs.
ICE is not law enforcement.
ICE is a domestic terrorist organization led by a corrupt head of state that should be sitting in prison.
ICE is a domestic terrorist organization led by a corrupt head of state that should be sitting in prison.
January 7, 2026 at 8:28 PM
ICE is not law enforcement.
ICE is a domestic terrorist organization led by a corrupt head of state that should be sitting in prison.
ICE is a domestic terrorist organization led by a corrupt head of state that should be sitting in prison.
Reposted by James Snell
ICE is a criminal organization.
January 7, 2026 at 6:28 PM
ICE is a criminal organization.
Regardless of anything this joke of an administration does, he'll always be Captain Kelly and Will Always be more of an American hero than every Republican combined.
NEW: Pentagon initiates proceedings to demote U.S. Senator Mark Kelly, a retired captain, over video telling soldiers to refuse illegal orders
January 6, 2026 at 2:30 AM
Regardless of anything this joke of an administration does, he'll always be Captain Kelly and Will Always be more of an American hero than every Republican combined.
My github wrapped for the year... git-wrapped.com/profiles/jas...
GitHub Wrapped 2025 - Your Coding Year in Review
Like Spotify Wrapped, but for your GitHub activity! See your top languages, commit streaks, most productive days, and more in an engaging story format. Get your 2025 coding year in review now.
git-wrapped.com
December 27, 2025 at 1:51 AM
My github wrapped for the year... git-wrapped.com/profiles/jas...
Fun fact. My first "enterprise" app... And the thing that got me started in my career, was a document management system written in Excel, where the forms were all digitized copies created as excel sheets, for the casino I worked at as a graveyard shift security dispatcher fresh out of highschool.
I am proud to have been part of the team that created Excel.
“You can use spreadsheets to run your Little League team, and you can use them to operate the Pentagon.”
www.bloomberg.com/features/202...
“You can use spreadsheets to run your Little League team, and you can use them to operate the Pentagon.”
www.bloomberg.com/features/202...
Microsoft Is the House That Excel Built
The ubiquitous spreadsheet software is expensive, derivative and depressing. It’s also the software the world can’t quit, even in the era of AI tools.
www.bloomberg.com
December 16, 2025 at 12:13 AM
Fun fact. My first "enterprise" app... And the thing that got me started in my career, was a document management system written in Excel, where the forms were all digitized copies created as excel sheets, for the casino I worked at as a graveyard shift security dispatcher fresh out of highschool.
Way to put absolute minimal effort Random Amazon delivery guy. He pulled up, didn't even get out of the car. Leaned out and dropped the box on the ground and left it there.
December 14, 2025 at 8:02 PM
Way to put absolute minimal effort Random Amazon delivery guy. He pulled up, didn't even get out of the car. Leaned out and dropped the box on the ground and left it there.
If you know what this is, and if you've ever had to get one unjammed before, congratulate me. This was perhaps one of the worst ones I've ever seen. Literally broke three separate pitman pullers before we managed to actually get it broken free. Ultimately required torching, a puller, and a fork...
December 14, 2025 at 12:30 AM
If you know what this is, and if you've ever had to get one unjammed before, congratulate me. This was perhaps one of the worst ones I've ever seen. Literally broke three separate pitman pullers before we managed to actually get it broken free. Ultimately required torching, a puller, and a fork...
Reposted by James Snell
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.
🎉
ICE is best when it's crushed.
They cannot be given authority to forcibly remove anyone from their vehicle this way. Think about how bad actors would abuse this power.
December 6, 2025 at 3:18 AM
ICE is best when it's crushed.
Reposted by James Snell
I, too, enjoy embedding V8 where it doesn't belong...
This Mini V8-Powered Drill Sounds Like a Corvette In the Palm of Your Hand
This modified drill is powered by a Toyan model V8 engine and is powerful enough to drill through plate steel.
www.thedrive.com
December 6, 2025 at 1:42 AM
I, too, enjoy embedding V8 where it doesn't belong...
Reposted by James Snell
want to learn the "why" behind all things javascript?
javascript in depth by @jasnell.me is written so that newer devs can think & build like vets.
it digs into engines, runtimes, & the design choices behind the language.
new in MEAP; get 50% off with code snellML through 12/18: hubs.la/Q03W-mVy0
javascript in depth by @jasnell.me is written so that newer devs can think & build like vets.
it digs into engines, runtimes, & the design choices behind the language.
new in MEAP; get 50% off with code snellML through 12/18: hubs.la/Q03W-mVy0
December 4, 2025 at 11:50 PM
want to learn the "why" behind all things javascript?
javascript in depth by @jasnell.me is written so that newer devs can think & build like vets.
it digs into engines, runtimes, & the design choices behind the language.
new in MEAP; get 50% off with code snellML through 12/18: hubs.la/Q03W-mVy0
javascript in depth by @jasnell.me is written so that newer devs can think & build like vets.
it digs into engines, runtimes, & the design choices behind the language.
new in MEAP; get 50% off with code snellML through 12/18: hubs.la/Q03W-mVy0
ICE is not law enforcement. ICE is state sponsored terrorism.
Last week, ICE arrested and separated a father and son after a routine check-in. Six-year-old Yuanxin had just enrolled in the first grade at an elementary school in Astoria. Now he's in custody, alone. ICE won't say where. This cruelty serves no one. It must end.
December 2, 2025 at 11:01 PM
ICE is not law enforcement. ICE is state sponsored terrorism.
Reposted by James Snell
Spread the word! 📢 The FATE (Fairness, Accountability, Transparency, and Ethics) group at @msftresearch.bsky.social in NYC is hiring interns and postdocs to start in summer 2026! 🎉
Apply by *December 15* for full consideration.
Apply by *December 15* for full consideration.
November 20, 2025 at 8:11 PM
Spread the word! 📢 The FATE (Fairness, Accountability, Transparency, and Ethics) group at @msftresearch.bsky.social in NYC is hiring interns and postdocs to start in summer 2026! 🎉
Apply by *December 15* for full consideration.
Apply by *December 15* for full consideration.
ok so... I'm writing a book. It's called JavaScript In Depth (www.manning.com/books/javasc...) ... the first four chapters are available by Manning.
This has been a difficult project and will continue to be so. The reason is that it isn't a How To book that focuses only on how to use the langauge
This has been a difficult project and will continue to be so. The reason is that it isn't a How To book that focuses only on how to use the langauge
JavaScript in Depth - James M. Snell
Explore the inner workings of the world’s most popular programming language and enjoy the power and control that comes only from deep knowledge! In JavaScript in Depth, JavaScript and Node legend Jame...
www.manning.com
November 20, 2025 at 9:37 PM
ok so... I'm writing a book. It's called JavaScript In Depth (www.manning.com/books/javasc...) ... the first four chapters are available by Manning.
This has been a difficult project and will continue to be so. The reason is that it isn't a How To book that focuses only on how to use the langauge
This has been a difficult project and will continue to be so. The reason is that it isn't a How To book that focuses only on how to use the langauge
The repo for the TypedArray find within tc39 proposal is GitHub.com/tc39/proposa...
GitHub - tc39/proposal-typedarray-findwithin: A proposal for searching for a subsequence within a TypedArray
A proposal for searching for a subsequence within a TypedArray - tc39/proposal-typedarray-findwithin
GitHub.com
November 19, 2025 at 7:05 PM
The repo for the TypedArray find within tc39 proposal is GitHub.com/tc39/proposa...
Here's the proposal repo... Still very light on detail: GitHub.com/tc39/proposa...
TypedArray concatenation (the first part of the presentation) is also great! I even suggested it (-ish) in 2021! 😅 es.discourse.group/t/lazy-array...
Lazy ArrayBuffer concatenation
The bl module in Node.js-land is handy because it provides a way to handle sequences of buffers as if they were a single buffer. It would be helpful to have this at the language level, and be able to ...
es.discourse.group
November 19, 2025 at 4:27 AM
Here's the proposal repo... Still very light on detail: GitHub.com/tc39/proposa...
In case you're curious... blog.cloudflare.com/18-november-...
Cloudflare outage on November 18, 2025
Cloudflare suffered a service outage on November 18, 2025. The outage was triggered by a bug in generation logic for a Bot Management feature file causing many Cloudflare services to be affected.
blog.cloudflare.com
November 18, 2025 at 11:50 PM
In case you're curious... blog.cloudflare.com/18-november-...
Will be happy to see this one advance
ECMAScript excitement 😉
Congrats to @jasnell.me on advancing Typed Array Find Within to Stage 1 at TC39 today 🎉
It aims to provide a native indexOf operations for Typed Arrays.
docs.google.com/presentation...
Congrats to @jasnell.me on advancing Typed Array Find Within to Stage 1 at TC39 today 🎉
It aims to provide a native indexOf operations for Typed Arrays.
docs.google.com/presentation...
November 18, 2025 at 7:01 PM
Will be happy to see this one advance
Lots of details to figure out here but it's about time we had an optimized typed array concatenation in the language.
ECMAScript excitement 😉
Congrats to @jasnell.me on advancing Typed Array Concatenation to Stage 1 at TC39 today 🎉
It aims to improve the performance of this concat operation compared to userland libraries.
Congrats to @jasnell.me on advancing Typed Array Concatenation to Stage 1 at TC39 today 🎉
It aims to improve the performance of this concat operation compared to userland libraries.
![const enc = new TextEncoder();
const u8_1 = enc.encode('hello');
const u8_2 = enc.encode('world');
const u8_3 = Uint8Array.concat([u8_1, u8_2]);](https://cdn.bsky.app/img/feed_thumbnail/plain/did:plc:w227epg3attqnssfdkx6ex6a/bafkreih3olwqia2py3t6uuc3qed3cldxqhzqvbk424j43twfsecmvzsrua@jpeg)
November 18, 2025 at 6:59 PM
Lots of details to figure out here but it's about time we had an optimized typed array concatenation in the language.
Reposted by James Snell
November 17, 2025 at 11:32 PM