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TC39 @tc39.es · 12d

@andreubotella.com
Ben Allen
@softwarechris.com
@legendecas.bsky.social
@jessealama.net
@jasnell.me
@bakkot.com
@nicr.dev
@bridgear.bsky.social
@naugtur.pl

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TC39 @tc39.es · 12d

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 · 12d

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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TC39 @tc39.es · 14d

Nice.

Boa @boajs.dev · 14d

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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TC39 @tc39.es · Jul 31

@andreubotella.com
@jessealama.net
Justin Ridgewell
@bakkot.com
@michael.ficarra.me
@nicr.dev
Richard Gibson
@sffc.bsky.social
Stephen Hicks
@naugtur.pl

14

TC39 @tc39.es · Jul 31

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 · Jul 31

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

4 24

TC39 @tc39.es · Jul 31

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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TC39 @tc39.es · Jul 31

ECMAScript Excitement 🎉

Today, TC39 advanced these proposals:

1️⃣ Array.getNonIndexStringProperties
1️⃣ Object.getOwnPropertySymbols options

1 15

TC39 @tc39.es · Jul 30

ECMAScript Excitement 🎉

Today, TC39 advanced these proposals:

2️⃣.7️⃣ Intl Era and Month Code
2️⃣ Import Buffer
1️⃣ Module Global

5 23

TC39 @tc39.es · Jul 29

ECMAScript Excitement 🎉

Today, TC39 advanced these proposals:

3️⃣ Immutable ArrayBuffer
2️⃣ Keep trailing zeros in Intl.NumberFormat and Intl.PluralRules

1 4 19

TC39 @tc39.es · Jul 28

ECMAScript Excitement 🎉

Today, TC39 advanced these proposals:

4️⃣ Math.sumPrecise
4️⃣ Uint8Array to/from base64 and hex
3️⃣ Iterator Sequencing
3️⃣ Upsert

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TC39 @tc39.es · Jul 3

The awards are well-deserved; we're fortunate to have them on committee and look forward to their continued participation, hopefully for many years to come.

Congratulations, and thank you both for all you've done!

14

TC39 @tc39.es · Jul 3

Ecma International Excitement 🎉

Last week, two TC39 members, Rob Palmer (@robpalmer.bsky.social) and Michael Saboff, received the Ecma Recognition Award for their contributions to Ecma, including TC39.

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TC39 @tc39.es · Jun 27

ECMAScript Excitement 🎉

This week, the Ecma General Assembly approved ECMAScript 2025 (ES2025), the 16th edition.

✨ Duplicate Named Capture Groups
✨ Float16Array
✨ Import Attributes
✨ Iterator Helpers
✨ JSON Modules
✨ Promise.try
✨ RegExp.escape
✨ RegExp Modifiers
✨ Set Methods

ECMA-262 - Ecma International

ECMAScript® 2025 language specification, 16th edition - ECMAScript is a programming language based on several technologies like JavaScript.

ecma-international.org

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TC39 @tc39.es · May 30

4️⃣ Explicit Resource Management
4️⃣ Array.fromAsync
4️⃣ Error.isError
2️⃣ Math.clamp
2️⃣ Seeded Pseudo-Random Numbers
1️⃣ Keep trailing zeros in Intl.NumberFormat and Intl.PluralRules
1️⃣ Random Functions
1️⃣ Inspector, originally a part of the Comparisons proposal

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TC39 @tc39.es · May 30

ECMAScript Excitement 🎉

This week, at its 108th meeting, TC39 advanced these proposals:

1 4 22

TC39 @tc39.es · May 30

ECMAScript Excitement 🎉

Today, TC39 advanced this proposal:

1️⃣ Inspector, originally a part of the Comparisons proposal

5

TC39 @tc39.es · May 29

ECMAScript Excitement 🎉

Today, TC39 advanced these proposals:

2️⃣ Math.clamp
2️⃣ Seeded Pseudo-Random Numbers
1️⃣ Random Functions

6 39

TC39 @tc39.es · May 28

ECMAScript Excitement 🎉

Today, TC39 advanced these proposals:

4️⃣ Explicit Resource Management
4️⃣ Array.fromAsync
4️⃣ Error.isError
1️⃣ Keep trailing zeros in Intl.NumberFormat and Intl.PluralRules

12 60

TC39 @tc39.es · Apr 17

ECMAScript Excitement 🎉

This week, at its 107th meeting, TC39 advanced these proposals:

2️⃣.7️⃣ Non-extensible Applies to Private
2️⃣.7️⃣ Upsert
2️⃣ export defer
1️⃣ Compare Strings by Codepoint
1️⃣ Composite Keys
1️⃣ Disposable AsyncContext
1️⃣ Enums
1️⃣ Object.propertyCount

and withdrew Records & Tuples

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TC39 @tc39.es · Apr 17

ECMAScript Excitement 🎉

Today, TC39 advanced this proposal:

1️⃣ Disposable AsyncContext

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TC39 @tc39.es · Apr 16

ECMAScript Excitement 🎉

Today, TC39 advanced these proposals:

2️⃣ export defer
1️⃣ Compare Strings by Codepoint

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TC39 @tc39.es · Apr 15

the what?

2

TC39 @tc39.es · Apr 15

ECMAScript Excitement 🎉

Today, TC39 advanced these proposals:

2️⃣.7️⃣ Non-extensible Applies to Private
1️⃣ Enums
1️⃣ Object.propertyCount

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