最近の活動、出来事｜petamoriken / 森建｜pixivFANBOX 全然投稿できてませんでした！ すみません。 TC39 会議まとめ活動 いつものようにまとめてます。 3月の議事録がまだ出ていませんが、Temporal が Stage 4 になっていましたね。Igalia による JavaScriptCore への実装を頑張ってほしい……。 TypeScript 6.0 TypeScript 6.0 がリリースされました。去年もやりましたが、今...

pixivFANBOXで最近の活動、出来事を公開しました！ moriken.fanbox.cc/posts/11693490

Observable · Issue #945 · mozilla/standards-positions Request for Mozilla Position on an Emerging Web Specification Specification title: Observable Specification or proposal URL (if available): https://wicg.github.io/observable/ Explainer URL (if avai...

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> I'd like to propose position: negative for this.
github.com/mozilla/stan...

@tc39.es Stage 3 proposal `import defer` is now code-complete in Chromium (behind a flag) thanks to Caio Lima at @igalia.com 🎉

The V8 work was done one month ago. Now Chromium integration is also done.

Still some fuzzing to go before unflagging.

chromium-review.googlesource.com/c/chromium/s...

Blink: Intent to Prototype: Shared AudioWorklet port

Blink: Intent to Ship: Programmatic scroll promises

大丈夫だった。
blog.jxck.io/entries/2026...

Web 標準動向 2026年3月版

zenn.dev/cybozu_front...

The State of Flint - Spring 2026 Flint's been under active development for almost a year. Let's cover what's been done, what's coming up next, and what's being pushed to the backlog.

Flint is going strong 💪 we've got a ton of progress to report from 2025 + the start of 2026, plus big plans for 2026->2027.

I'm so happy to be leading a project that has such a great team and is making such consistent progress on a solid foundation + vision. ❤️‍🔥

www.flint.fyi/blog/the-sta...

OpenTelemetry の Generative AI Observability の話

zenn.dev/zenogawa/art...

feat: genai otel instrumentation by arnauorriols · Pull Request #32993 · denoland/deno

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github.com/denoland/den...

module: add clearCache for CJS and ESM by anonrig · Pull Request #61767 · nodejs/node Introduce Module.clearCache() to invalidate CommonJS and ESM module caches with optional resolution context, enabling HMR-like reloads. Document the API and add tests/fixtures to cover cache invali...

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> I think we should use stronger language to clarify "violate the spec at your own risk", in case V8 start to CHECK on it.
github.com/nodejs/node/...

Gecko: Intent to prototype & ship: Canvas2D 'lang' attribute

Announcing TypeScript 6.0 - TypeScript TypeScript 6.0 is now available! TypeScript 6 is a stepping-stone release, aligning with the upcoming native-speed 7.0 release.

TypeScript 6.0 is now available!

This release brings better type-checking for methods, new standard library features, new module features for Node.js, and more!

But most important, this release brings us one step closer to the upcoming native-speed 7.0!

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

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github.com/explainers-b...

TypeScript 6.0 Iteration Plan · Issue #63085 · microsoft/TypeScript Date Event 2026-02-06 Create 6.0 Beta (6.0.0) Build for Testing 2026-02-10 TypeScript 6.0 Beta Release 2026-02-21 Create 6.0 RC (6.0.1) Build for Testing 2026-02-24 TypeScript 6.0 RC Release 2026-0...

It appears that TypeScript 6.0 is scheduled to be released on the 23rd.
github.com/microsoft/Ty...

Explainer: A Native HTML Element `<genai>` for AI-Generated Content Disclosure · Issue #273 · WICG/proposals Explainer: A Native HTML Element <genai> for AI-Generated Content Disclosure Table of Contents Introduction Problem Statement Goals & Non-Goals Proposed Solution Why a New Element — Not an Attribut...

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github.com/WICG/proposa...

Thank you for your help with reviewing my PRs to Deno and for championing my Normative Changes at TC39.

I look forward to your future endeavors!

Personal update: I resigned from Deno two weeks ago. Yesterday was my last day at Deno.

Working on Deno, Deno Deploy, JSR, and Fresh with my world class colleagues has been an absolute honor. I wish everyone who I have worked with at Deno the absolute best - continue building groundbreaking things!

Blink: Intent to Prototype: Relative Alpha Colors (CSS Color 5 alpha() function)

Delegates of TC39 in Google's Chelsea Market office

ECMAScript excitement 😉

This week in NY @tc39.es advanced these proposals 🎉

4⃣ Intl Era/Month Code
4⃣ Temporal
3⃣ Import Text
2⃣.7⃣ Error Stack Accessor
2⃣.7⃣ Iterator Includes
2⃣ Intl Unit Protocol
2⃣ Thenable Curtailment
1⃣ Error Code Property
🗑️ Dynamic Import Host Adjustment

ECMAScript Euphoria! 🎉

We don't always post when a single proposal advances, but when we do, it's Temporal -> Stage 4.

Just days shy of 9 years from Stage 1, a herculean effort on the part of many champions, delegates, invited experts, and contributors, past and present. Thank you all! 🙌

Slay the Spire 2 やって

GitHub - tc39/proposal-intl-era-monthcode: To specify necessary details about era, eraYear and monthCode usage with Temporal for non-ISO calendars. To specify necessary details about era, eraYear and monthCode usage with Temporal for non-ISO calendars. - tc39/proposal-intl-era-monthcode

ECMAScript excitement 😉

Congrats to Ben Allen @igalia.com on advancing Intl era & monthCode to Stage 4 at TC39 today 🎉

It extends Temporal by defining handling of era, eraCode & monthCode for non-ISO-8601 calendars.

github.com/tc39/proposa...

Modulo Operator %% When I'm working on a carousel that allows infinite scrolling and I need to support negative indices, I often find myself wanting a Modulo Operator. const carousel: NodeList = document.getElementById...

es.discourse.group/t/modulo-ope...

Modulo Operator %% *copied from es-discuss mailing list JS needs a modulo operator. It currently has the remainder operator % which works in most cases except for negative values. I believe %% would work great and ...

CSS has rem() and mod()

I'm starting to feel like I want a modulo operator %% in JS, in addition to the % operator that corresponds to remainder 🤔
es.discourse.group/t/modulo-ope...

It's so hard to implement CSS Values and Units...🥹
github.com/denoland/den...

Web Haptics API · Issue #262 · WICG/proposals Introduction Modern operating systems have embraced haptics as a core part of user experience — providing subtle, low-latency tactile cues that reinforce visual and auditory feedback. These signals...

👀 Web Haptics API · Issue #262 · WICG/proposals github.com/WICG/proposa...

I've learned that implementing CSS functions is more difficult than I anticipated...

CSS.supports("width", "calc(1deg * 1px * 1% * 1s / 1deg / 1% / 1s)");
// => true

GitHub - webcomponents/custom-elements-manifest: A file format for describing custom elements A file format for describing custom elements. Contribute to webcomponents/custom-elements-manifest development by creating an account on GitHub.

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webcomponents/custom-elements-manifest: A file format for describing custom elements github.com/webcomponent...

2026-01 の TC39 meeting - moriken's project まとめ Agenda: https://github.com/tc39/agendas/blob/main/2026/01.md 速報: https://x.com/robpalmer2/status/2014298317040058745 Note: https://github.com/tc39/notes/pull/389 決まったこと Web compatibility issues /

2026-01 の TC39 meeting - moriken's project scrapbox.io/petamoriken/...