This year's GitHub Octoverse annual survey did a good job of correctly representing TypeScript & JavaScript as a single ecosystem. When this combined data is omitted, it results in misleading takes.

Made some progress in my hobby project 🎄 Moving single executable application building into Node.js core for better UX/DX, currently works on macOS and Linux and open for feedback! (No Windows yet because I don't take another laptop with me on vacation 😅) github.com/nodejs/node/...

The SWC parser is now 65% faster than 6 months ago and 104% faster than a year ago🚀 Huge kudos to @kdy1.bsky.social and @c_punisher 👏

In the next release, Rspack adds support for the new Import Bytes proposal:

Micro QuickJS is a new JavaScript engine by the famous Fabrice Bellard 🎉 📖 Written in C 🗜️ Uses 100 kB ROM ⚠️ Supports a subset of JS close to ES5 🐏 Runs programs in as little as 10 kB of RAM 🔥 Speed is comparable to the full QuickJS engine github.com/bellard/mqui...

I have seen @jason-williams.co.uk speak before and it was exceptional, stoked about this talk and #TemporalAPI being more widely available in the new year.

#SotB26 Speaker reveal time! The speaker, who is a former DJ and sound engineer and has pushed new standards for the web, is Jason Williams! Jason will talk to you about how Temporal can simplify some of your work. 2026.stateofthebrowser.com/speaker/jaso...

Woo! Cannot wait to speak at State Of The Browser 2026. Looking forward to meeting other people in this space too, see you next year!

JavaScript declarations in conditionals was discussed at TC39 recently, but consensus broke down over one key detail. How do you think it should behave?

After recently hearing Lea's version of "I will always love you", I can confirm she is awesome at karaoke. She'd probably be a great juggler too, given the shared appreciation for Whitney Houston's favourite form of coordination. HAAAND-EYEEEEE...

ECMAScript excitement 😉 Safari 26.2 ships support for: 🔶 Math.sumPrecise 🔶 [Weak]Map.prototype.getOrInsert (aka "Upsert")

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. 🎉

TypeScript offers two syntaxes for declaring namespaces. module ns {...} // deprecated namespace ns {...} // modern TypeScript 6.0 will only support the second form.

TypeScript excitement 😉 The infamous Dimitri is cooking up a slick type analysis tool called TypeSlayer 🔥 "If you have a large enough project, there are performance problems where you can shave 100 seconds off CI by making a 5 line change. The problem is knowing out where to make that change."

Type stripping is stable in a LTS version 👽

Working in an enterprise setup with corporate proxies or custom CAs? Node.js has native support for that. No external dependency required, just configure and continue 👍 Details: https://nodejs.org/en/learn/http/enterprise-network-configuration

ECMAScript excitement 😉 A highly comprehensive article on what will (and might!) land in ES2026 by @marypcbuk.bsky.social 🎉 Includes coverage on Temporal by Boa creator @jason-williams.co.uk who leads the Rust-based temporal_rs library, as used by Google's V8 engine, amongst others.

With ECMAScript 2026, JavaScript will get more precise about sums, errors, international dates and times — and it may finally be time for Temporal. By @marypcbuk.bsky.social

Chrome 144 beta is out now→ goo.gle/48zbLpB This release includes the Temporal API for better JavaScript dates, the <geolocation> element, @scroll-state container queries, and more.

ECMAScript excitement 😉 The Temporal API ships in Chrome 144 Beta today 🎉 developer.chrome.com/blog/chrome-... Right on time. Arriving in the Chrome Stable release in approximately one month!

Node excitement 😉 Congrats to @hybrist.dev on landing support for Package Imports that start with #/ 🎉 Previously this prefix was special-cased and would error. It's convenient to use it as an internal absolute path to the package root. import foo from "#/src/file.ts"

Hello friends and welcome to a new “How is ESM vs CJS going!” 33.4% of the popular packages on npm now includes ESM. Up from 29.6% half a year ago. We have a third! ESM-only is up from 11.5% to 12.6%. This is also the impact of half a year of Node 18 being EOL, making `require(esm)` available

The changed code is a small fraction of an open source contribution. Your commitment to understand the issue, how your proposed solution fits with the project, and be ready to own and push the review process forward is the biggest chunk of the work. Your effort is the contribution, not the code.

📣 TanStack AI Alpha is here! ✨ Framework agnostic 🤖 Provider agnostic 🧠 Type safe 🔧 Isomorphic tools 🛠 Devtools 🌐 Open protocol 📦 JS, Python, PHP ⚛️ React, Solid, Vanilla 🌀 OpenAI, Anthropic, Gemini, Ollama, ++ Official blog post: tanstack.com/blog/tanstac... Docs: tanstack.com/ai

@oliverturner.cloud come find us at the Banker

I should probably already have known about Moddable XS but a JavaScript engine for embedded that does most of modern JavaScript not just ES5? nice!

It’s amazing how quickly the Go version of TypeScript was created. The key “trick” of the TS team was to port, not to rewrite: 2ality.com/2025/03/type...

I'm sure many of you have already been trying out the native preview, but if you haven't, now is the best time to start!

TypeScript excitement 😉 News on the Go-based TS 7.0 🎉 🔷 Checker is very compatible with TS 5.9 🔷 Language Server maturity leapt forward 🔷 JS downlevel is limited: ES2021 now, ES2015 in future 🔷 JS checking gets stricter 🔷 No API access yet

Announcing Oxfmt: Oxc Formatter Alpha oxc.rs/blog/2025-1...

If you're tired of supporting tsconfigs too, I've wrote something. github.com/bluwy/tsconf...

A bit of a vulnerable post by me but we need your help to get us through what has been a more difficult period than 2020. It would be really appreciated if you could read and share in your networks too 💛 bell.bz/its-been-a-v...

It was great to visit Tokyo for JSConf.jp and TC39 last week! Now I'm down in Kyoto being mesmerized by the fall colors. 🍁

This week I attended my first in-person TC39.es meeting in Tokyo as a delegate. 🎉 It was very exciting to meet so many new and interesting people working towards the future of JavaScript. 🚀 I can’t wait to contribute more to the proposals, thank you for welcoming me into this community! 🤗

chokidar 5 published 🎉 now ESM only! 185KB -> 105KB install size

TypeScript excitement 😉 "Our type checks are infinitely parallelizable" @brad.zacher.com.au explains how the difference between the ts & d.ts dependency graphs can help scale the TS checker to 12 MLoC. A 2x faster P50 shifted user behavior to rely less on CI and boosted local checking by 70% 🔥

Node & TypeScript excitement 😉 Marco tells the story of implementing Type Stripping support in Node. It involves a lot of collaboration across the JS ecosystem. 🔷 First cut took 20 days (fast for Node) 🔷 TS delivered flags to ease adoption 🔷 Marco's reward: a bread machine

TIL that MDN has a ctrl+k search

ECMAScript excitement 😉 This week TC39 advanced these proposals 🎉 4️⃣ Intl.Locale Info 4️⃣ Iterator.concat 4️⃣ JSON.parse Source Text 3️⃣ Iterator.zip 2️⃣.7️⃣ Iterator.prototype.join 2️⃣.7️⃣ Promise.allKeyed 2️⃣ Error.captureStackTrace 2️⃣ Import Text 2️⃣ Object.keysLength 1️⃣ Intl Energy Units 1️⃣ Intl Unit Protocol 🧵

ECMAScript excitement 😉 Congrats to @bridgear.bsky.social @jordan.har.band on advancing Object.getNonIndexStringProperties to Stage 1 at TC39 today 🎉 Given an object, it provides an array of enumerable own properties that are not numeric indices. github.com/BridgeAR/arr...

ECMAScript excitement 😉 Congrats to @nicr.dev on advancing Intl Energy Units to Stage 1 at TC39 today 🎉 It provides three new units to work with Intl.NumberFormat for string formatting 👍 github.com/johanrd/prop...

ECMAScript excitement 😉 Congrats to @bridgear.bsky.social @jordan.har.band on advancing Object.keysLength to Stage 2 at TC39 today 🎉 let count = Object.keysLength(o) It counts the string-keyed own properties on an object. This avoids the cost of the intermediate array in Object.keys(o).length

Here's the proposal repo... Still very light on detail: GitHub.com/tc39/proposa...

ECMAScript excitement 😉 Congrats to @bakkot.com on advancing Iterator Join to stage 2.7 at TC39 today 🎉 Iterator.prototype.join() turns an iterator directly into a single string (with an optional separator) just like Array.prototype.join() github.com/bakkot/propo...

Early bird tickets end today! Spread the word. 2026.stateofthebrowser.com/tickets/

👀 Future of JS This underrated upcoming JS feature is super useful 🔥 Soon, you should be able to import JS code as a string! This is super useful, in particular for docs sites! Similar to Webpack raw loader, asset query ?raw etc, but available everywhere natively!

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...

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.

ECMAScript excitement 😉 Congrats to Eemeli Aro @mozilla.org on advancing Import Text to Stage 2 at TC39 today 🎉 It uses an import attribute for easy loading. import text from "path/to/file.txt" with { type: "text" }; github.com/eemeli/propo...

ECMAScript excitement 😉 Congrats to @sffc.bsky.social on advancing Intl Unit Protocol to Stage 1 at TC39 today 🎉 It aims to provide a protocol that lets a number formatter accept a number annotated with a unit. This is independent of the Amount proposal. github.com/sffc/proposa...