github.com/WebKit/WebKi... WebKit / Safari is closing the last gap between the spec and the implementation of Temporal. They were struggling with discrepancies in calendrical calculations of ICU across platforms and versions, but it seems they have resolved all issues. Very good news.

🔥 New blog post: In defense of polyfills A highly influential spec editor expressed the opinion that polyfilling is harmful. I beg to differ. lea.verou.me/blog/2026/po...

In defense of polyfills • Lea Verou

An influential spec editor thinks polyfilling is harmful. I think blaming polyfills for compat accidents is like blaming car crashes on the ambulances that show up — and the alternative is a stagnant ...

lea.verou.me

I wrote an article about difference between `iso8601` and `gregory` calendars in ECMAScript (in Japanese). I'm planning to translate it into English someday.

ふぁぼん@fabon.info · last mo.

ECMAScriptにおけるグレゴリオ暦: `iso8601`と`gregory`｜ふぁぼん zenn.dev/fabon/articl... #zenn 誰が興味あるの? って感じの重箱の隅をつつきました

Excited to share Nav262, our experimental IDE for navigating ECMA-262 algorithms, implemented by @albertotontoni.bsky.social at the University of Bergen. Repo: github.com/bldl/nav262

GitHub - bldl/nav262: An IDE to navigate the JavaScript specification.

An IDE to navigate the JavaScript specification. Contribute to bldl/nav262 development by creating an account on GitHub.

github.com

How to use markdown-exit (or another Markdown renderer) in Eleventy dnevnik.fabon.info/posts/2026/0... I wrote a new article about Eleventy and markdown-exit. Freedom and flexibility is power, long live Eleventy!

Migrating `Date`, moment.js, day.js, or Luxon to Temporal in chaotic codebase isn't straightforward. It's like a migration of terrible JavaScript code to TypeScript.

temporal-polyfill 🕒 1.0 is out! Smaller and with a tree-shakeable API that can be codemodded away. Great for component lib authors: tiny footprint now, zero footprint later, and shared internals with the host app's polyfill (if they choose to install it).

Finally wrote my blog post about Diplomat I should have written this ages ago, but better late than never manishearth.github.io/blog/2026/06...

Diplomat: Multi-language FFI for Rust libraries

This is a post I’ve been meaning to write and publish for years, and only recently got around to doing it. I’m hoping to get back into writing more! For the past few years, as a part of my work on …

manishearth.github.io

I'm very happy to know that JSPI on wasm will be shipped in all major browsers within a few months. Asyncify was definitely a great workaround but not an ideal solution at all.

If you're a web developer and want to come to Japan, the CFP for #JSConf Japan 2026 is now open! Your travel and lodging expenses for the conference are covered, so it's a great chance to visit Japan while you're at it. jsconf.jp/2026/en

Changing How We Develop Ladybird - Ladybird ladybird.org/posts/changi... It's a very confusing statement. They mentioned AI, but if it the reason, the solution would be AI policy or something similar. Actually they states that "Whether code was typed by hand is beside the point."

Changing How We Develop Ladybird - Ladybird

Ladybird is changing how code enters the project as we prepare to ship a browser to real users.

ladybird.org

www.youtube.com/@unicode/vid... Recently I knew that Unicode Consortium uploads many interesting videos. It is a goldmine for language geeks.

The Unicode Consortium

This is the official YouTube channel of the Unicode Consortium. Everyone in the world should be able to use their own language on phones and computers. Unicode helps make this possible. Unicode als...

youtube.com

Lately I've found myself repeating the same explanations to different people about how Node.js and V8 build/test/stay in sync with each other. To reduce the parroting, here's a blog post about the workflows, challenges I see, and some hands-on tips joyeecheung.github.io/blog/2026/05...

Gecko: Intent to Prototype: EditContext

I ran Temporal tests in test262 against Node.js v26, and Node.js fails in 1.3 k files (6.8 k files in total) because behavior of non-ISO calendars is not spec-compliant.

Recently I knew Takumi, an alternative rendering engine to Satori. It seems that Takumi is generally better at multilingual support than Satori. Takumi can render complex scripts like Thai and Arabic properly, which Satori renders incorrectly or even can't render.

I wrote a blog article about another lightweight Temporal polyfill I made. Long live ECMAScript! dnevnik.fabon.info/posts/2026/0...

What I like the most about Vue and Nuxt is this document. nuxt.com/docs/4.x/gui...

Nuxt and Hydration · Best Practices v4

Why fixing hydration issues is important

nuxt.com

github.com/fabon-f/temp... I've released temporal-polyfill-lite v0.3.5, including improvement of spec compliance and types.

Release v0.3.5 · fabon-f/temporal-polyfill-lite

0.3.5 (2026-04-20) Fixed Fix wrong order of observable operations for options object in Intl.DateTimeFormat constructor (#28) Fix types of Intl when the polyfill is used as a ponyfill (#29)

github.com

ECMAScript excitement 😉 JSC just landed a long-planned rewrite of their ESM module loader that will fix multiple famous spec bugs including those holding back ES2022 Top-Level Await 🎉 JSC is the JS engine used in Safari and Bun. github.com/WebKit/WebKi...

[JSC] Rewrite module loader by heimskr · Pull Request #57827 · WebKit/WebKit

4a63810 [JSC] Rewrite module loader https://bugs.webkit.org/show_bug.cgi?id=242740 rdar://97370038 Reviewed by Yusuke Suzuki and Sosuke Suzuki. The current module loader has long-standing bugs. T...

github.com

It has been a year since Anthropic CEO stated AI will write 100% of code in a year, and now I write 100% of code (note: I'm not AI). Tech geeks in the midst of AI frenzy would never think such a programmer still exists in the world though.

github.com/unicode-org/... I'm looking forward to the upcoming release of ICU4X 2.2

ICU4X 2.2 release checklist · Issue #7809 · unicode-org/icu4x

Pre-release checklist This is a checklist of things that should be done in the weeks leading to the release. Verify that the milestone and checklist are complete Verify with component owners that t...

github.com

I wrote docs about caveats and restrictions of the polyfill. Thanks to Gemini for polishing my clumsy English writings. github.com/fabon-f/temp...

Reading TG2 meeting notes are my monthly delight, but honestly I find it difficult to understand discussions on areas except dates, times, and calendars, since I've been focusing on Temporal exclusively for a long time. Maybe it's time for me to learn other things, especially numerics and amounts.

I've published a patch release of temporal-polyfill-lite v0.3.3, including a bug fix related to extreme dates in `persian` calendar. Also an opt-in cache for system time zone ID is added. github.com/fabon-f/temp...

Release v0.3.3 · fabon-f/temporal-polyfill-lite

0.3.3 (2026-03-21) Added Introduce opt-in cache for system time zone ID (#22) Fixed Fix bugs related to extreme dates in persian calendar (#23)

github.com

The recording of @jason-williams.co.uk talk ‘Temporal: It’s about time!’ is now available to watch online! 2026.stateofthebrowser.com/speaker/jaso... And Temporal has reached Stage 4: www.igalia.com/2026/03/13/T...

Blink: Intent to Ship: CSS ruby-overhang property

Yesterday I gave a talk about Temporal and ECMAScript in a small dev meetup called #temporal_study in Tokyo. In summary, I looked back the history of date time processing in JavaScript and analyze what Temporal brings to the web and other areas (especially i18n).

@bkardell.com and @meyerweb.com chat with Igalia's @ptomato.name, @nicr.dev and Bloomberg's @jason-williams.co.uk about the JavaScript Temporal API www.igalia.com/chats/tempor...

Temporal is finally here, "8 yrs, 11 mos" in the making! Congrats @ptomato.name and and the champions! Humbled to be invited to the @tc39.es meeting where it moved to Stage 4. During my work on temporal-polyfill, I collaborated with the champions to improve datetime arithmetics and duration rounding