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@andreubotella.com Christian Ulbrich Caio Lima Gustavo Tonietto Linus Groh Luna Pfeiffer @nicr.dev @goose.icu @bridgear.bsky.social @sffc.bsky.social @naugtur.pl

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Note-takers are the unsung heroes of TC39. Without them, no progress could be made. It is right to give them thanks and praise. Here's to those who helped at this week's meeting! 🥳👏🙌 👇

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2️⃣ Stable Formatting 1️⃣ Comparisons 1️⃣ Default Behaviours for some Intl APIs 1️⃣ export all from and... - regressed Decorators and Decorator metadata to stage 2.7 - withdrew isTemplateObject

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TC39 @tc39.es · 01/04/2026

ECMAScript Excitement 🎉 This week, at its 114th meeting, TC39 advanced these proposals: 4️⃣ Atomics.pause 4️⃣ Joint iteration 3️⃣ Error stack accessor 3️⃣ Intl: Keep Trailing Zeros 3️⃣ Iterator Chunking 3️⃣ Iterator Includes 3️⃣ Iterator Join 3️⃣ RegExp Buffer Boundaries 2️⃣ Amount 2️⃣ Intl Sequence Units and... 👇

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We are also considering whether each new revision should get a new UUID. Stay tuned.

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TC39 @tc39.es · 01/04/2026

A back-compat alias may be provided for a short deprecation period as a courtesy. You're welcome.

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TC39 @tc39.es · 01/04/2026

We are THRILLED to announce that our Ecma standards will now use UUIDs instead of integers. ECMA-262 is now ECMA-39c506d7-731f-4220-8ffd-a68970945a65. Far more scalable. No two specs will ever collide again. Perfect system. Shortened forms like ECMA-39c506d7 are acceptable in casual conversation.

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TC39 @tc39.es · 20/03/2026

Last week we were able to present @robpalmer.bsky.social with his physical Ecma Recognition Award! 🎉 This was followed by an extensive round of tributes and praise, which Rob endured somewhat uncomfortably, at every opportunity urging us to cease and attend to the waiting celebratory Temporal cake.

Rob Palmer, TC39 chair, receiving Ecma Recognition Award from Samina Husain, Secretary General of Ecma International

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if only bsky let us edit posts, we could properly tag @michael.ficarra.me in the OP!

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We're grateful to Michael and Shu for continuing and excited to welcome Linus, Nicolò, Richard, and Ron. Many thanks to Kevin Gibbons (@bakkot.com) for his years of service as an editor; we look forward to his continued participation in committee.

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ECMAScript Excitement 🎉 This week, TC39 elected a new editor group for the ECMAScript specification (ECMA-262). Editors are: ✨ Linus Groh ✨ Michael Ficarra ✨ Nicolò Ribaudo (@nicr.dev) ✨ Richard Gibson ✨ Ron Buckton (@chronicles.org) ✨ Shu-yu Guo (@rfrn.org)

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Note-takers are the unsung heroes of TC39. Without them, no progress could be made. It is right to give them thanks and praise. Here's to those who helped at this week's meeting! 🥳👏🙌 👇

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TC39 @tc39.es · 13/03/2026

ECMAScript Excitement 🎉 This week, at its 113th meeting, TC39 advanced these proposals: 4️⃣ Intl era and monthCode 4️⃣ Temporal 3️⃣ Import text 2️⃣.7️⃣ Error stack accessor 2️⃣.7️⃣ Iterator includes 2️⃣ Intl unit protocol 2️⃣ Thenable curtailment 1️⃣ Error code property and withdrew Dynamic import host adjustment

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Please no. But if you must, we will remember you. 🧡

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TC39 @tc39.es · 11/03/2026

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! 🙌

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Note-takers are the unsung heroes of TC39. Without them, no progress could be made. It is right to give them thanks and praise. Here's to those who helped at the last two meetings! 🥳👏🙌 👇

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and withdrew Intl.UnitFormat

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ECMAScript Excitement 🎉 Recently, at its 112th meeting, TC39 advanced these proposals: 4️⃣ Upsert: Map.prototype.getOrInsert() 3️⃣ Intl Era/Month Code 2️⃣ import.sync() 1️⃣ Composable Accessors via built-in Decorators 1️⃣ Alias Accessors 1️⃣ Error Option: framesAbove 1️⃣ Error Option: limit and... 👇

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2️⃣ Object.keysLength 1️⃣ Intl Energy Units 1️⃣ Intl Unit Protocol 1️⃣ Object.getNonIndexStringProperties 1️⃣ Typed Array Concatenation 1️⃣ Typed Array Find Within

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TC39 @tc39.es · 26/09/2025

ECMAScript Excitement 🎉 Recently, at its 111th meeting, TC39 advanced these proposals: 4️⃣ Intl.Locale Info 4️⃣ Iterator.concat 4️⃣ JSON.parse Source Text 3️⃣ [Iterator.zip](github.com/tc39/proposa...) 2️⃣.7️⃣ Iterator.prototype.join 2️⃣.7️⃣ Promise.allKeyed 2️⃣ Error.captureStackTrace 2️⃣ Import Text and... 👇

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Note-takers are the unsung heroes of TC39. Without them, no progress could be made. It is right to give them thanks and praise. Here's to those who helped at this week's meeting! 🥳👏🙌 👇

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TC39 @tc39.es · 26/09/2025

ECMAScript Excitement 🎉 This week, at its 110th meeting, TC39 advanced these proposals: 3️⃣ Non-extensible applies to Private 2️⃣.7️⃣ Import Bytes 2️⃣.7️⃣ Iterator Chunking 2️⃣ Native Promise Predicate 1️⃣ Array.prototype.pushAll 1️⃣ Native Promise Adoption

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Note-takers are the unsung heroes of TC39. Without them, no progress could be made. It is right to give them thanks and praise. Here's to those who helped at this week's meeting! 🥳👏🙌 👇

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2️⃣.7️⃣ Intl Era and Month Code 2️⃣ Keep trailing zeros in Intl.NumberFormat and Intl.PluralRules 2️⃣ Import Bytes 1️⃣ Module Global 1️⃣ Array.getNonIndexStringProperties 1️⃣ Object.getOwnPropertySymbols options

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ECMAScript Excitement 🎉 This week, at its 109th meeting, TC39 advanced these proposals: 4️⃣ Math.sumPrecise 4️⃣ Uint8Array to/from base64 and hex 3️⃣ Iterator Sequencing 3️⃣ Upsert 3️⃣ Immutable ArrayBuffer and... 👇

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