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Daniel Rosenwasser @danr.bsky.social · 11d

Congratulations!! 🎉🎉

Reposted by Daniel Rosenwasser

Rob Palmer @robpalmer.bsky.social · 21d

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 ✨

Boa @boajs.dev · 21d

Temporal_rs has been released!!!

This is the first public release of Temporal_rs, a Rust implementation of the Temporal API powering Boa, Kiesel, V8 plus other engines.

This will be shipping in Chromium soon

More info in our blog post: boajs.dev/blog/2025/09...

Temporal_rs is here! The datetime library powering Temporal in Boa, Kiesel, and V8 | Boa JS

clock banner

boajs.dev

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Reposted by Daniel Rosenwasser

Jake Bailey @jakebailey.dev · Sep 13

STOP DOING MODERN SLEEP
COMPUTERS WERE NOT SUPPOSED TO BE ALWAYS ON
YEARS OF KERNEL PATCHES yet NO REAL-WORLD USE FOUND for not dropping to the LOWEST sleep state
Wanted to close the lid and open it later? We had a tool for that: It was called "S3 Suspend to RAM"
"Yes please do a Windows update. Please do it while in my backpack" - Statements dreamed up by the utterly Deranged
LOOK at what Hardware Manufacturers have been demanding your Respect for all this time, with all the OSs and userspace software we built for them
deep advertized in /sys/power/mem_sleep ONLY s2idle works
"Hello I would like a 100°C laptop with 3% battery"
They have played us for absolute fools

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Reposted by Daniel Rosenwasser

Visual Studio Code @vscode.dev · Sep 11

🚀 v1.104 of VS Code is here! Check out what's new:

🤖 Improved coding agent integration
📄 AGENTS.md file support for better context
🔍 New Auto mode (Preview) for smart model selection
🔑 Model flexibility via BYOK extension API

…and more: aka.ms/VSCodeRelease

Here are the highlights 🧵

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Daniel Rosenwasser @danr.bsky.social · Aug 26

Isn't this already the behavior of strict being on? Before users had to opt in to breakiness.

The big problem is that if strict is on for everyone, we always have to think about this on the context of "now everyone is broken" which was always the reason we didn't do it.

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Daniel Rosenwasser @danr.bsky.social · Aug 26

@robpalmer.bsky.social makes a good point - `--strict`-by-default isn't the only thing to expect in TypeScript 6.0. We're trying to adopt better defaults and simplify for the future.

Check out the current plans on our milestone: github.com/microsoft/Ty...

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Daniel Rosenwasser @danr.bsky.social · Aug 26

Issue, not PR :D

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Reposted by Daniel Rosenwasser

Rob Palmer @robpalmer.bsky.social · Aug 25

TypeScript excitement 😉

TS 6.0 is planning a bunch of breaking changes to tsconfig options to deprecate some and change the defaults for others. This will simplify configuration and ease the transition to the Go-based TS 7.0 👍

The latest pitch is to enable strict type-checking modes by default 🎉

Daniel Rosenwasser @danr.bsky.social · Aug 25

Just filed an issue to turn `--strict` on by default in TypeScript.

Maybe it's a little bit ambitious, but I'm excited for us to try this one. 😄

github.com/microsoft/Ty...

Enable `--strict` mode by default · Issue #62333 · microsoft/TypeScript

Background Almost a decade ago, we began to add certain options beyond --noImplicitAny and --strictNullChecks. Flags like --strictFunctionTypes, --noImplicitThis, and --strictBindCallApply have bee...

github.com

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Daniel Rosenwasser @danr.bsky.social · Aug 25

I get the broader point. For specific options, I think noUncheckedIndexedAccess may be a little rough for most people, but we might be able to do better analyses with a faster TS.

With exactOptionalPropertyTypes, that requires a bit more of an ecosystem adaptation, and it's very annoyingly subtle.

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Daniel Rosenwasser @danr.bsky.social · Aug 25

I'll bring it up in the issue though.

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Daniel Rosenwasser @danr.bsky.social · Aug 25

You mean like saying that `noImplicitAny` has "graduated" to being using useful enough to turn it on by default?

I do like that, but I think being able to say "all of strict is on" is a little bit easier to think about than "most of strict is now empty and these 10 flags are now on".

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Daniel Rosenwasser @danr.bsky.social · Aug 25

Just filed an issue to turn `--strict` on by default in TypeScript.

Maybe it's a little bit ambitious, but I'm excited for us to try this one. 😄

github.com/microsoft/Ty...

Enable `--strict` mode by default · Issue #62333 · microsoft/TypeScript

Background Almost a decade ago, we began to add certain options beyond --noImplicitAny and --strictNullChecks. Flags like --strictFunctionTypes, --noImplicitThis, and --strictBindCallApply have bee...

github.com

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Reposted by Daniel Rosenwasser

Jake Bailey @jakebailey.dev · Aug 21

Tonight will be one of the best nightlies of the TypeScript Native Preview ever.

1) @andrewbran.ch fully rewrote the language server infra into a snapshot model. No more data races. It's so cool

2) Sheetal added build mode (-b), and it's even _concurrent_ build mode. 10x+ on dt-tools, hot and cold

Benchmark 1: node ./node_modules/typescript/lib/tsc.js -b . -f
Time (mean ± σ): 4.204 s ± 0.057 s [User: 6.437 s, System: 0.533 s]
Range (min … max): 4.142 s … 4.305 s 10 runs

Benchmark 2: /home/jabaile/work/TypeScript-go/built/local/tsgo -b . -f
Time (mean ± σ): 377.8 ms ± 8.1 ms [User: 2827.7 ms, System: 453.3 ms]
Range (min … max): 361.4 ms … 387.1 ms 10 runs

Summary
/home/jabaile/work/TypeScript-go/built/local/tsgo -b . -f ran
11.13 ± 0.28 times faster than node ./node_modules/typescript/lib/tsc.js -b . -f

Benchmark 1: node ./node_modules/typescript/lib/tsc.js -b .
Time (mean ± σ): 1.247 s ± 0.016 s [User: 1.859 s, System: 0.252 s]
Range (min … max): 1.232 s … 1.284 s 10 runs

Warning: Statistical outliers were detected. Consider re-running this benchmark on a quiet system without any interferences from other programs. It might help to use the '--warmup' or '--prepare' options.

Benchmark 2: /home/jabaile/work/TypeScript-go/built/local/tsgo -b .
Time (mean ± σ): 120.6 ms ± 9.5 ms [User: 843.1 ms, System: 207.4 ms]
Range (min … max): 111.8 ms … 156.0 ms 24 runs

Summary
/home/jabaile/work/TypeScript-go/built/local/tsgo -b . ran
10.34 ± 0.82 times faster than node ./node_modules/typescript/lib/tsc.js -b .

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Daniel Rosenwasser @danr.bsky.social · Aug 18

But I will say, it's *relatively* rare and you can always get consistent results if you distribute files consistently across a fixed number of processes

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Daniel Rosenwasser @danr.bsky.social · Aug 18

Technically there are issues where checking files in different orders can result in different types. tsgo mostly avoids this with how it sorts/orders types, TS today has a branch with this logic that @jakebailey.dev ported over.

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Reposted by Daniel Rosenwasser

Rob Palmer @robpalmer.bsky.social · Aug 5

It's easy to miss a key feature of Node's TypeScript support that was released on Friday: it's zero config 💥

Meaning you don't need to put anything in package.json. Strictly speaking you don't even need a tsconfig to run the code.

nodejs.org/en/blog/rele...

2025-07-31, Version 22.18.0 'Jod' (LTS), @aduh95
Notable Changes
Type stripping is enabled by default
Node.js will be able to execute TypeScript files without additional configuration:

$ echo 'const foo: string = "World"; console.log(`Hello ${foo}!`);' > file.ts
$ node file.ts
Hello World!

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Reposted by Daniel Rosenwasser

Rob Palmer @robpalmer.bsky.social · Aug 1

Node excitement 😉

Congrats to @marcoippolito.dev on today's landmark Node 22.18 release. It is the first LTS release to ship unflagged TypeScript support 🎉

This means Node can run *.ts files. It pairs well with TypeScript's "erasableSyntaxOnly" flag 👍

Many folk contributed 🙏

Marco Ippolito @marcoippolito.dev · Aug 1

Type stripping is enabled by default 🔥🔥🔥🔥
You can just run `node file.ts` without `--experimental-strip-types` flag.
This is a huge milestone

aduh95.bsky.social @aduh95.bsky.social · Jul 31

Node.js 22.18.0 is out and enables type stripping by default – that’s right, Node.js LTS can now run TypeScript files. Shout out to @marcoippolito.dev for championing that effort! Download links and full changelog available at nodejs.org/en/blog/rele...

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Reposted by Daniel Rosenwasser

Rob Palmer @robpalmer.bsky.social · Aug 1

TypeScript excitement 😉

TS 5.9 is out 🎉

🔶 `import defer` by @nicr.dev
🔶 module: "node20" for require(ESM)
🔷 --init has modern defaults (no downleveling)
🔷 Docs: Inline summaries for DOM APIs
🔷 IDE: Expandable hovers to drill into Quick Infos
🔷 Perf: Faster type instantiation & file existence

TypeScript @typescriptlang.org · Aug 1

TypeScript 5.9 is now available! 📣

This release brings:

✅ An updated tsc --init
✅ Type-checking for the new 'import defer'
✅ Actual summaries in more DOM APIs
✅ Expandable quick info hovers (✨preview✨)

and more! Read up more on our blog:

devblogs.microsoft.com/typescript/a...

Announcing TypeScript 5.9 - TypeScript

Today we are excited to announce the release of TypeScript 5.9! If you’re not familiar with TypeScript, it’s a language that builds on JavaScript by adding syntax for types. With types, TypeScript mak...

devblogs.microsoft.com

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Reposted by Daniel Rosenwasser

TypeScript @typescriptlang.org · Aug 1

TypeScript 5.9 is now available! 📣

This release brings:

✅ An updated tsc --init
✅ Type-checking for the new 'import defer'
✅ Actual summaries in more DOM APIs
✅ Expandable quick info hovers (✨preview✨)

and more! Read up more on our blog:

devblogs.microsoft.com/typescript/a...

Announcing TypeScript 5.9 - TypeScript

Today we are excited to announce the release of TypeScript 5.9! If you’re not familiar with TypeScript, it’s a language that builds on JavaScript by adding syntax for types. With types, TypeScript mak...

devblogs.microsoft.com

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Reposted by Daniel Rosenwasser

Visual Studio Code @vscode.dev · Jul 10

🚀 v1.102 of VS Code is here! Check out what’s new:

- MCP is GA with GitHub policy support
- GitHub Copilot Chat is open source
- Use custom modes for tailored chat
- Background task management with Copilot coding agent

…and so much more: aka.ms/VSCodeRelease

🧶 Here are some of the highlights…

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Reposted by Daniel Rosenwasser

Lea Verou, PhD @lea.verou.me · Jul 8

🔥 I have news! After a 1y hiatus, I’m once again leading this year’s #StateOfHTML survey, thanks to generous funding by Google. ❤️

🙋🏽‍♀️ Is there is an HTML feature or Web API you're dying to see progress on? Suggest it and it could be included!

[1/2]

lea.verou.me/blog/2025/de...

Influence the State of HTML 2025 Survey! • Lea Verou

lea.verou.me

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Daniel Rosenwasser @danr.bsky.social · Jul 8

Fixed, thanks!

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Reposted by Daniel Rosenwasser

TypeScript @typescriptlang.org · Jul 8

TypeScript 5.9 Beta just went out! Try it in your project and let us know what you think:

devblogs.microsoft.com/typescript/a...

Announcing TypeScript 5.9 Beta - TypeScript

Today we are excited to announce the availability of TypeScript 5.9 Beta. To get started using the beta, you can get it through npm with the following command: npm install -D typescript@beta Let’s tak...

devblogs.microsoft.com

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Reposted by Daniel Rosenwasser

Visual Studio Code @vscode.dev · Jun 30

Last month, we announced plans to open source the GitHub Copilot Chat extension. Today, we've reached that milestone. Let's build the future of software development together: aka.ms/oss-ai-editor

Open Source AI Editor: First Milestone

We are open sourcing the GitHub Copilot Chat extension. It’s the first milestone in making VS Code an open source AI editor.

aka.ms

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Reposted by Daniel Rosenwasser

Slack Engineering @slack.engineering · Jun 19

Slack now runs the new Go-powered @typescriptlang.org checker in CI. Using the tool saves us over 5 minutes per run, meaning faster merges and happier developers.

Huge thanks to Anders, @jakebailey.dev, and everyone else on the project for the incredible performance gains.

Microsoft Developer @developer.microsoft.com · Mar 20

ICYMI: TypeScript is now 10x faster!

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