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Temporalのpolyfillをゼロから実装した
要約 軽量なTemporalのpolyfillであるtemporal-polyfill-liteを実装しました。 最終版（最新）の仕様を実装しており、TypeScript公式の型定義とも互換性があります。 大半の（グレゴリオ暦しか使わない）開発者にとっては、2026年4月現在これが一番バンドルサイズの小さいpolyfillとなっています。 Temporalの現在地 Temporalはこの3月にstage 4に到達しました。Firefoxは去年5月に、Chromeは今年の1月にTemporal対応のバージョンをリリースしています。Node.jsは今年5月にリリース予定のv26でTemporalに対応する予定です[1]。Safariの実装は遅れていますが、実装は進行中なので時間の問題でしょう[2]。 今年はTemporal元年なのでどんどん使っていこう……と言いたいところですが、今のところpo
Temporal: The 9-Year Journey to Fix Time in JavaScript
Welcome to our blog! I'm Jason Williams, a senior software engineer on Bloomberg's JavaScript Infrastructure and Terminal Experience team. Today the Bloomberg Terminal runs a lot of JavaScript. Our team provides a JavaScript environment to engineers across the company. Bloomberg may not be the first company you think of when discussing JavaScript. It certainly wasn't for me in 2018 before I worked
GitHub - tc39/proposal-error-frames-above: ECMAScript Proposal: Error option `framesAbove`
This proposal introduces a new Error options property, framesAbove, that allows authors to exclude specific leading stack frames when an error's stack trace is captured. framesAbove receives a method (i.e., a callable function). If the provided value is neither a method nor undefined, the constructor throws a TypeError. When the stack trace for the error is collected, all frames above the topmost
Exploring JavaScript (ES2025 Edition)
Print version: “JavaScript for impatient programmers” (ES2019 edition) Available on: 🇺🇸 Amazon.com (USD), 🇬🇧 Amazon.co.uk (GBP), 🇩🇪 Amazon.de (EUR), 🇫🇷 Amazon.fr (EUR), 🇪🇸 Amazon.es (EUR), 🇮🇹 Amazon.it (EUR), 🇳🇱 Amazon.nl (EUR), 🇯🇵 Amazon.co.jp (JPY), 🇮🇳 Amazon.in (INR), 🇨🇦 Amazon.ca (CAD), 🇧🇷 Amazon.com.br (BRL), 🇲🇽 Amazon.com.mx (MXN), 🇦🇺 Amazon.com.au (AUD) Upgrading f
JSON module scripts are now Baseline Newly available | Blog | web.dev
Published: June 18, 2025 If you want to import a JSON file in a JavaScript module, you previously had to go through hoops like embedding JSON in JavaScript just so you can use a regular import statement, or downloading a file with fetch() and then calling Response.json(). This is a problem that is now solved in all modern browsers thanks to JSON module scripts and import attributes. The following
ECMAScript proposal updates @ 2025-05
The changes of proposal’s status @ 108th meeting of Ecma TC39 ECMA-262 New Proposals Proposal Stage Inspector 1 More Random Functions 1 Updated Proposals Proposal From To SeededPRNG 1 2 Math.clamp 1 2 Error.isError 3 4 ECMA-402 New Proposals Proposal Stage [Keep trailing zeros in Intl.NumberFormat and Intl.PluralRules][trailing-zero] 1 Updated Proposals No Data This diff is generated by ECMAScript
tc39/notes | DeepWiki
Overview Relevant source files .eslintrc.js .npmrc .nvmrc README.md delegates.txt meetings/2018-09/sept-25.md meetings/2019-01/jan-29.md meetings/2019-01/jan-30.md meetings/2019-01/jan-31.md meetings/2019-03/mar-26.md meetings/2019-03/mar-27.md meetings/2019-03/mar-28.md meetings/2020-02/february-4.md meetings/2020-02/february-5.md meetings/2020-02/february-6.md scripts/check-delegates-test.mjs sc
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Normative: Add `using` and `await using` Declarations, SuppressedError, DisposableStack, and AsyncDisposableStack by rbuckton · Pull Request #3000 · tc39/ecma262
Releasing Babel 8 today: ESM-only, drop ES5 default, and a smooth migration path · Babel
GitHub - fabon-f/temporal-polyfill-lite: Lightweight Temporal polyfill
Release ES2026 Candidate March 31st 2026 · tc39/ecma262
ECMAScript proposal updates @ 2026-03
TC39 Advances Temporal to Stage 4 Alongside Several ECMAScri...
Temporal to stage 4, per 2026.03.11 TC39 · tc39/proposals@f915929
Upsert to stage 4, per 2026.01.20 TC39 · tc39/proposals@131e53d
GitHub - tc39/proposal-iterator-chunking: a proposal to add a method to iterators for producing an iterator of its subsequences
Ecma International approves new standards - Ecma International
GitHub - tc39/proposal-inspector: ECMAScript Proposal, specs, and reference implementation for Inspector
GitHub - tc39/proposal-composites
