Rob Palmer
@robpalmer.bsky.social
JavaScript Infrastructure & Tooling at Bloomberg. Co-chairing TC39. Likely to tweet tech stuff about JS & software performance. Opinions are my own.
ECMAScript excitement 😉
Congrats to @bridgear.bsky.social on advancing Error Option Limit to Stage 1 @tc39 today 🎉
It allows the captured stack depth to be limited on a per-object basis 👍
It removes the need to rely on implementation-specific global APIs.
github.com/tc39-transfe...
Congrats to @bridgear.bsky.social on advancing Error Option Limit to Stage 1 @tc39 today 🎉
It allows the captured stack depth to be limited on a per-object basis 👍
It removes the need to rely on implementation-specific global APIs.
github.com/tc39-transfe...
January 20, 2026 at 8:12 PM
ECMAScript excitement 😉
Congrats to @bridgear.bsky.social on advancing Error Option Limit to Stage 1 @tc39 today 🎉
It allows the captured stack depth to be limited on a per-object basis 👍
It removes the need to rely on implementation-specific global APIs.
github.com/tc39-transfe...
Congrats to @bridgear.bsky.social on advancing Error Option Limit to Stage 1 @tc39 today 🎉
It allows the captured stack depth to be limited on a per-object basis 👍
It removes the need to rely on implementation-specific global APIs.
github.com/tc39-transfe...
ECMAScript excitement 😉
Congrats to @guybedford.com on advancing Import Sync to Stage 2 at @tc39.es today 🎉
const mod = import.sync();
Like Node's require(), it synchronously loads a module. It throws if sync loading is not possible.
github.com/guybedford/p...
Congrats to @guybedford.com on advancing Import Sync to Stage 2 at @tc39.es today 🎉
const mod = import.sync(
Like Node's require(
github.com/guybedford/p...
January 20, 2026 at 7:35 PM
ECMAScript excitement 😉
Congrats to @guybedford.com on advancing Import Sync to Stage 2 at @tc39.es today 🎉
const mod = import.sync();
Like Node's require(), it synchronously loads a module. It throws if sync loading is not possible.
github.com/guybedford/p...
Congrats to @guybedford.com on advancing Import Sync to Stage 2 at @tc39.es today 🎉
const mod = import.sync(
Like Node's require(
github.com/guybedford/p...
ECMAScript excitement 😉
Congrats to Dan Minor @mozilla.org on advancing the Upsert proposal to Stage 4 at TC39 today 🎉
let map = new Map();
map.getOrInsert(key, defaultVal);
It lets you set a default value on a map key without overwriting an existing value 👍
Congrats to Dan Minor @mozilla.org on advancing the Upsert proposal to Stage 4 at TC39 today 🎉
let map = new Map();
map.getOrInsert(key, defaultVal);
It lets you set a default value on a map key without overwriting an existing value 👍
January 20, 2026 at 3:47 PM
ECMAScript excitement 😉
Congrats to Dan Minor @mozilla.org on advancing the Upsert proposal to Stage 4 at TC39 today 🎉
let map = new Map();
map.getOrInsert(key, defaultVal);
It lets you set a default value on a map key without overwriting an existing value 👍
Congrats to Dan Minor @mozilla.org on advancing the Upsert proposal to Stage 4 at TC39 today 🎉
let map = new Map();
map.getOrInsert(key, defaultVal);
It lets you set a default value on a map key without overwriting an existing value 👍
A bumper lineup of important Node.js features that Joyee worked on are now marked as stable 🎉
require(ESM) is the most recognisable.
require(ESM) is the most recognisable.
This release contains a bunch of PRs I recently submitted to mark features I contributed to as stable/release candidate. Here is a thread about them 🧵:
Node.js v25.4.0 is out! 💚
• require(esm) now stable and a new CLI flag: --require-module
• http setGlobalProxyFromEnv() added
• Multiple APIs promoted to stable (heapsnapshot, build snapshot, v8.queryObjects)
• Root CAs updated to NSS 3.117
More in: nodejs.org/en/blog/rele...
• require(esm) now stable and a new CLI flag: --require-module
• http setGlobalProxyFromEnv() added
• Multiple APIs promoted to stable (heapsnapshot, build snapshot, v8.queryObjects)
• Root CAs updated to NSS 3.117
More in: nodejs.org/en/blog/rele...
January 19, 2026 at 6:53 PM
A bumper lineup of important Node.js features that Joyee worked on are now marked as stable 🎉
require(ESM) is the most recognisable.
require(ESM) is the most recognisable.
Reposted by Rob Palmer
Rspack and Rsbuild core packages are now pure ESM.
Already merged, will be released in v2 🌟
Already merged, will be released in v2 🌟
January 15, 2026 at 1:51 PM
Rspack and Rsbuild core packages are now pure ESM.
Already merged, will be released in v2 🌟
Already merged, will be released in v2 🌟
Reposted by Rob Palmer
Woah. jQuery migrated to ESM!
Come on other big libraries! No excuses now.
Come on other big libraries! No excuses now.
jQuery support standard JS modules. jQuery!
If they can do it, other big libraries can do it too.
blog.jquery.com/2026/01/17/j...
If they can do it, other big libraries can do it too.
blog.jquery.com/2026/01/17/j...
jQuery 4.0.0 | Official jQuery Blog
jQuery: The Write Less, Do More, JavaScript Library
blog.jquery.com
January 18, 2026 at 6:18 PM
Woah. jQuery migrated to ESM!
Come on other big libraries! No excuses now.
Come on other big libraries! No excuses now.
Reposted by Rob Palmer
Cloudflare has been building a great open source team. They work closely with tons of projects. They know how to collaborate with others. This will be good for Astro. And I think we will see more of these moves from them. I wonder if they'll knock the door on a certain protocol company one day.
January 16, 2026 at 3:25 PM
Cloudflare has been building a great open source team. They work closely with tons of projects. They know how to collaborate with others. This will be good for Astro. And I think we will see more of these moves from them. I wonder if they'll knock the door on a certain protocol company one day.
Update on TC39 Stage 3 Import Defer:
The second patch by Caio has been merged into V8 🎉
That represents the bulk of the functionality and follows the already-merged parsing support.
Next up: Support for dynamic import.defer()
chromium-review.googlesource.com/c/v8/v8/+/74...
The second patch by Caio has been merged into V8 🎉
That represents the bulk of the functionality and follows the already-merged parsing support.
Next up: Support for dynamic import.defer()
chromium-review.googlesource.com/c/v8/v8/+/74...
January 17, 2026 at 7:21 AM
Update on TC39 Stage 3 Import Defer:
The second patch by Caio has been merged into V8 🎉
That represents the bulk of the functionality and follows the already-merged parsing support.
Next up: Support for dynamic import.defer()
chromium-review.googlesource.com/c/v8/v8/+/74...
The second patch by Caio has been merged into V8 🎉
That represents the bulk of the functionality and follows the already-merged parsing support.
Next up: Support for dynamic import.defer()
chromium-review.googlesource.com/c/v8/v8/+/74...
📜 A good summary of recent developments around the Temporal API by @sarahgooding.bsky.social
Temporal is the modern replacement for the old JS Date API ✨
Temporal is the modern replacement for the old JS Date API ✨
🎉 Chrome 144 ships the Temporal API, a long-awaited update to #JavaScript date and time handling that aims to replace the legacy Date object.
socket.dev/blog/tempora... h/t @robpalmer.bsky.social
socket.dev/blog/tempora... h/t @robpalmer.bsky.social
Temporal API Ships in Chrome 144, Marking a Major Shift for ...
Chrome 144 introduces the Temporal API, a modern approach to date and time handling designed to fix long-standing issues with JavaScript’s Date object...
socket.dev
January 16, 2026 at 6:13 PM
📜 A good summary of recent developments around the Temporal API by @sarahgooding.bsky.social
Temporal is the modern replacement for the old JS Date API ✨
Temporal is the modern replacement for the old JS Date API ✨
Reposted by Rob Palmer
We are joining Cloudflare! astro.build/blog/joining...
The Astro Technology Company joins Cloudflare | Astro
The Astro Technology Company is joining Cloudflare! Astro remains open-source, MIT-licensed, and platform-agnostic. With Cloudflare's support, we're focusing 100% on building the best framework for…
astro.build
January 16, 2026 at 2:17 PM
We are joining Cloudflare! astro.build/blog/joining...
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.
Reposted by Rob Palmer
So happy to have been a part of this! FWIW, my contributions were early on with initial API sketching. Glad to see others taking it over the finish line!
The beginnings were right around the time I did this talk... www.youtube.com/watch?v=aVuo...
The beginnings were right around the time I did this talk... www.youtube.com/watch?v=aVuo...
Matt Johnson: The Past, Present, and Future of JavaScript Date and Time APIs | JSConf EU 2017
YouTube video by JSConf
www.youtube.com
January 15, 2026 at 8:41 PM
So happy to have been a part of this! FWIW, my contributions were early on with initial API sketching. Glad to see others taking it over the finish line!
The beginnings were right around the time I did this talk... www.youtube.com/watch?v=aVuo...
The beginnings were right around the time I did this talk... www.youtube.com/watch?v=aVuo...
Reposted by Rob Palmer
I love this Daniel. What I particularly appreciated was the nuance. AI tools aren't good or bad, they are tools and can be used well, or poorly. I'm trying to use it to work faster, but without losing quality - and it's completely possible. But it is easy to just work fast and carelessly. Well said!
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 15, 2026 at 8:22 AM
I love this Daniel. What I particularly appreciated was the nuance. AI tools aren't good or bad, they are tools and can be used well, or poorly. I'm trying to use it to work faster, but without losing quality - and it's completely possible. But it is easy to just work fast and carelessly. Well said!
Reposted by Rob Palmer
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 Rob Palmer
Temporal shipped in Chrome 144 yesterday, so only Safari remains.
Here’s @wil.to explaining why it’s better piccalil.li/blog/date-is...
Here’s @wil.to explaining why it’s better piccalil.li/blog/date-is...
Date is out, Temporal is in
Temporal is the Date system we always wanted in JavaScript. It's extremely close to being available so Mat Marquis thought it would be a good idea to explain exactly what is better about this new Java...
piccalil.li
January 14, 2026 at 8:43 AM
Temporal shipped in Chrome 144 yesterday, so only Safari remains.
Here’s @wil.to explaining why it’s better piccalil.li/blog/date-is...
Here’s @wil.to explaining why it’s better piccalil.li/blog/date-is...
Reposted by Rob Palmer
Hurrah for Temporal now shipping in Chrome!
Better update this blog post already.
Better update this blog post already.
A short article on the perils of the old JS Date API by @philna.sh 📜
It explains the modern solution: use Temporal which shipped in Chrome 144 yesterday 👍
And the article is already out of date! 😉
(in a good way - the article was published 24 hours before Chrome shipped)
It explains the modern solution: use Temporal which shipped in Chrome 144 yesterday 👍
And the article is already out of date! 😉
(in a good way - the article was published 24 hours before Chrome shipped)
January 14, 2026 at 8:36 AM
Hurrah for Temporal now shipping in Chrome!
Better update this blog post already.
Better update this blog post already.
📜 "Date is out, Temporal is in"
An article by @wil.to on problems found in the ancient JS Date API and how they are solved in the modern Temporal API 👍
Focuses on immutability and ergonomics of calculations. Love the kicker.
An article by @wil.to on problems found in the ancient JS Date API and how they are solved in the modern Temporal API 👍
Focuses on immutability and ergonomics of calculations. Love the kicker.
January 14, 2026 at 8:35 AM
📜 "Date is out, Temporal is in"
An article by @wil.to on problems found in the ancient JS Date API and how they are solved in the modern Temporal API 👍
Focuses on immutability and ergonomics of calculations. Love the kicker.
An article by @wil.to on problems found in the ancient JS Date API and how they are solved in the modern Temporal API 👍
Focuses on immutability and ergonomics of calculations. Love the kicker.
A short article on the perils of the old JS Date API by @philna.sh 📜
It explains the modern solution: use Temporal which shipped in Chrome 144 yesterday 👍
And the article is already out of date! 😉
(in a good way - the article was published 24 hours before Chrome shipped)
It explains the modern solution: use Temporal which shipped in Chrome 144 yesterday 👍
And the article is already out of date! 😉
(in a good way - the article was published 24 hours before Chrome shipped)
January 14, 2026 at 8:15 AM
A short article on the perils of the old JS Date API by @philna.sh 📜
It explains the modern solution: use Temporal which shipped in Chrome 144 yesterday 👍
And the article is already out of date! 😉
(in a good way - the article was published 24 hours before Chrome shipped)
It explains the modern solution: use Temporal which shipped in Chrome 144 yesterday 👍
And the article is already out of date! 😉
(in a good way - the article was published 24 hours before Chrome shipped)
Reposted by Rob Palmer
I am on the edge of my seat hoping Temporal squeaks into ES2026 as I predicted - it's been a long journey with so much work by so many people inside ECMAscript and out - but developers can start relying on it this year
January 13, 2026 at 8:41 PM
I am on the edge of my seat hoping Temporal squeaks into ES2026 as I predicted - it's been a long journey with so much work by so many people inside ECMAscript and out - but developers can start relying on it this year
ECMAScript excitement 😉
🚨🚨🚨 IT'S ABOUT TIME! 🚨🚨🚨
Congrats to @manishearth.bsky.social on shipping the Temporal API in Chrome 144 stable today 🎉
developer.chrome.com/blog/new-in-...
Temporal is the replacement for the Date API.
🚨🚨🚨 IT'S ABOUT TIME! 🚨🚨🚨
Congrats to @manishearth.bsky.social on shipping the Temporal API in Chrome 144 stable today 🎉
developer.chrome.com/blog/new-in-...
Temporal is the replacement for the Date API.
January 13, 2026 at 8:27 PM
ECMAScript excitement 😉
🚨🚨🚨 IT'S ABOUT TIME! 🚨🚨🚨
Congrats to @manishearth.bsky.social on shipping the Temporal API in Chrome 144 stable today 🎉
developer.chrome.com/blog/new-in-...
Temporal is the replacement for the Date API.
🚨🚨🚨 IT'S ABOUT TIME! 🚨🚨🚨
Congrats to @manishearth.bsky.social on shipping the Temporal API in Chrome 144 stable today 🎉
developer.chrome.com/blog/new-in-...
Temporal is the replacement for the Date API.
Reposted by Rob Palmer
Today, we published a security release for @nodejs.org that fixes a critical bug affecting virtually every production Node.js app.
If you use React Server Components, Next.js, or ANY APM tool (Datadog, New Relic, OpenTelemetry), your app could be vulnerable to DoS attacks.
👇
If you use React Server Components, Next.js, or ANY APM tool (Datadog, New Relic, OpenTelemetry), your app could be vulnerable to DoS attacks.
👇
January 13, 2026 at 6:50 PM
Today, we published a security release for @nodejs.org that fixes a critical bug affecting virtually every production Node.js app.
If you use React Server Components, Next.js, or ANY APM tool (Datadog, New Relic, OpenTelemetry), your app could be vulnerable to DoS attacks.
👇
If you use React Server Components, Next.js, or ANY APM tool (Datadog, New Relic, OpenTelemetry), your app could be vulnerable to DoS attacks.
👇
Reposted by Rob Palmer
64% of WebKit non-Apple contributions, 20% of Chromium non-Google, 27% of Servo, 39% of test262, and it goes on.
And doing all this as a worker-owned, employee-run cooperative. The world would be a very different place if companies like Igalia were the norm rather than the exception in tech.
And doing all this as a worker-owned, employee-run cooperative. The world would be a very different place if companies like Igalia were the norm rather than the exception in tech.
We analyzed Igalia's contributions to some of our favorite open-source projects on the web and elsewhere and summarized them in this blog post! Check it out: www.igalia.com/2026/01/05/D...
Doing Our Share for the Web in 2025 | Igalia
Igalia is an open source consultancy specialised in the development of innovative projects and solutions. Our engineers have expertise in a wide range of technological areas, including browsers and cl...
www.igalia.com
January 12, 2026 at 7:44 PM
64% of WebKit non-Apple contributions, 20% of Chromium non-Google, 27% of Servo, 39% of test262, and it goes on.
And doing all this as a worker-owned, employee-run cooperative. The world would be a very different place if companies like Igalia were the norm rather than the exception in tech.
And doing all this as a worker-owned, employee-run cooperative. The world would be a very different place if companies like Igalia were the norm rather than the exception in tech.
State of the Browser 2026 🎉
28th Feb in London 🇬🇧
@jason-williams.co.uk will present "It's about time" discussing the new JavaScript Temporal API ⌚
28th Feb in London 🇬🇧
@jason-williams.co.uk will present "It's about time" discussing the new JavaScript Temporal API ⌚
We have created a #SotB26 starter-pack of Speakers and Organisers.
go.bsky.app/Di7jHyZ
We'll others involved soon.
go.bsky.app/Di7jHyZ
We'll others involved soon.
January 9, 2026 at 6:09 PM
State of the Browser 2026 🎉
28th Feb in London 🇬🇧
@jason-williams.co.uk will present "It's about time" discussing the new JavaScript Temporal API ⌚
28th Feb in London 🇬🇧
@jason-williams.co.uk will present "It's about time" discussing the new JavaScript Temporal API ⌚
Reposted by Rob Palmer
January 9, 2026 at 11:44 AM
Reposted by Rob Palmer
My GopherCon talk was just posted!
GopherCon 2025: Porting the TypeScript Compiler to Go for a 10x Speedup V2 - Jake Bailey
YouTube video by Gopher Academy
youtu.be
January 7, 2026 at 2:50 AM
My GopherCon talk was just posted!