"tsgo caught type errors that the JavaScript implementation didn’t catch! I adopted tsgo in 20+ projects ranging from 1,000 to 1,000,000 lines of code, and it has improved iteration speed quite a bit." cpojer.net/posts/fastes...

console.log("Hello, World!"); Follow for updates on every new release of @vscode.dev!

Some pretty awesome improvements in 1.26 for compiling/testing typescript-go. With a clean build/test cache, running the full test suite used to take 3m45s, but now takes just 2m10s.

Our tsgo adoption at Vanta has been pretty high-impact. Everything is so, so much faster now.

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

Made a few updates to the post - specifically: - es2025 target - new library additions/updates - deprecation of node10 bsky.app/profile/type...

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...

Probably as specific as anyone really needs to get

"You know, I actually don't hate it anymore. It's actually pretty good." Glowing endorsements from my Python friends. 🥰

TypeScript excitement 😉 Congrats to @moriken.dev on landing support for the ES2025 target in upstream TypeScript 🎉 Heading for TS 6.0 Beta next week 👍 github.com/microsoft/Ty...

TypeScript excitement 😉 Congrats to Renegade334 on landing type declarations for @tc39.es Temporal - the new JS Date-Time API - in upstream TypeScript 🎉 Heading for TS 6.0 Beta next week 👍 Temporal is available in Firefox & Chrome today. github.com/microsoft/Ty...

By the way, TypeScript is finally strict by default 🎉

👀 TypeScript 6.0 (beta) drops next week It should be the last JS-based TSC version (no 6.1.*, only patches) TypeScript 6.0 is a “bridge release ” toward TypeScript 7.0, written in Go, ~10x faster github.com/microsoft/Ty...

You told us you’re running multiple AI agents and wanted a better UX. We listened and shipped it! Here’s what’s new: 🗂️ Unified agent sessions workspace for local, background, and cloud agents 🔀 Parallel subagents 💻 Claude and Codex support for local and cloud agents 🌐 Integrated browser & more...

TypeScript excitement 😉 Congrats to @jakebailey.dev on updating upstream tsc to default to an unpinned *latest* yearly edition of ES20xx. Heading for TS 6.0 🎉 This mean less transpilation of new JS features & more use of native language features provided by JS engines 👍 github.com/microsoft/Ty...

Forgive me, I wrote a thing about AI: journal.stuffwithstuff.com/2026/01/24/t...

"Once men turned their thinking over to machines in the hope that this would set them free. But that only permitted other men with machines to enslave them." ― Frank Herbert, Dune cassidoo.co/post/good-br...

You may have noticed that search on the VS Code website has gotten a lot quicker lately. In our latest blogpost, João Moreno breaks down the engineering process behind docfind, a search engine we built that runs entirely in your browser using WebAssembly: code.visualstudio.com/blogs/2026/0...

wrote some things I've been thinking about ai ... and it ended up feeling very personal roe.dev/blog/the-go...

"It was the 90s, everything in Unicode seemed like a good idea."

Fun story from today. I'm currently trying to get `--strict` on by default in TypeScript 6.0. Our test suite has many tests which are written with `--strict false`, so I am updating them by adding a special comment our test suite recognizes for options // @strict: false However...

My GopherCon talk was just posted!

Who will be the first to run @googleballs.com in a type system?

I just switched a project from `typescript` to `@typescript/native-preview` and reduced pnpm build time by 81% 🤯

It's the first Monday of 2026! Awful, we know. But have you tried out TypeScript's native previews, or do you hate when your editor and builds are faster?

🥳 TypeSlayer is out! celebrate by posting what your type graph looks like! it legit has an actual leaderboard now: so bonus points if you win lol 🏆🏆 run: `npx typeslayer` source: github.com/dimitropoulo...

Your TypeScript year in review You "silenced" 417 errors with `as any` that turned into runtime errors as soon as the code ran TypeScript printed 4,693 error messages. 26 of them made sense You spent 98 minutes waiting for tsc to run. During this time you spent 544 minutes reading social media

Cannot wait to play Doom in TypeScript on the Sega Dreamcast github.com/drpaneas/lib...

👋 Hi! For those unfamiliar I'm Hawk, a UX Engineer on the @vscode.dev team. As 2025 comes to a close, I've been wanting to get a pulse on how folks are writing code. Genuinely curious: What tool(s) do you use? What do you like/dislike about them? What do you wish your tool could do that it doesn't?

My regular PSA that if you enjoy working on developer tools, then Jane Street is kind of an amazing place. Apply here! There's no special posting, so just apply for the Software Engineering role, and express your interests in dev-tools in a note. janestreet.com/apply

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."

now in early-access/alpha/beta/gamma/whatever-you-wanna-call-it. here's a walkthrough: youtu.be/IP6EZXzXBzY

⚔️introducing TypeSlayer⚔️ A #typescript type performance benchmarking and analysis tool. A summation of everything learned from the benchmarking required to make the Doom project happen. It's got MCP support, Perfetto, Speedscope, Treemap, duplicate package detection, and more.

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...

It’s good! My main task right now at Vanta (when not wrangling organizational growth stuff) is migrating all of our packages to it, even the ones doing crazy shenanigans that tsgo catches and tsc incorrectly let pass. (There are only a handful in our millions of lines of code.) I repeat: it’s good!

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

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!

A status update on the TypeScript rewrite TL;DR - if you haven't tried it already, you should!

We've got some updates on TypeScript 7! The new native port - can type-check any project - supports --build and --incremental - has rich editor features implemented - is still 10x faster and is ready for you to try today! devblogs.microsoft.com/typescript/p...

who are all you people

FWIW we rolled out opt-in usage of the @typescriptlang.org native preview for in-editor workflows a few weeks ago at Vanta and the response has been extremely and overwhelmingly positive, the gaps in LSP support notwithstanding. I’m working on our blockers to just using it for all type checking.

My #BazelCon 2025 talk about how Canva used isolatedDeclarations to greatly improve typecheck performance youtu.be/26CoMExb6FE

Today on the pod, Daniel Rosenwasser & Jake Bailey reveal what's coming in TypeScript 6 & 7! Learn about ES2024 defaults, the new Go compiler, and smarter DOM typings. share.transistor.fm/s/ad05eae6 #typescript

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.

Type stripping is now stable. Enjoy 🌞

I'm pleased that this year's GitHub survey acknowledges that untyped & typed JavaScript deserve to be counted as part of the same ecosystem. 🔶 New repos (last 12 months): JS 9.3M, Python 9.3M, TS 5.4M 🔶 Contributor delta (last 12 months): TS +1.1M, Python +0.9M, JS +0.4M 🔶 Contributor count chart

Big news in this year's GitHub Octoverse report: TypeScript is now the most-used language on GitHub! We are thrilled and grateful to see the TypeScript and JavaScript community continue to grow and thrive. 🚀 Read up more at github.blog/news-insight...

We are still looking for feedback on tsgo, but it is worth calling out we expect some type-checking changes that you may need to adapt to. The native previews are easy to grab from npm, and are published nightly to try out! www.npmjs.com/package/@typ...

ECMAScript excitement 😉 @jason-williams.co.uk from TechAtBloomberg announces the release of Boa's Rust-based implementation of TC39 Stage 3 Temporal 🎉 Chrome estimates this will ship in Chromium 143 🎉🎉 Temporal is the shiny replacement for the broken JS Date API ✨