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robpalmer.bsky.social
JavaScript Infrastructure & Tooling at Bloomberg. Co-chairing TC39. Likely to tweet tech stuff about JS & software performance. Opinions are my own.
301 posts 3,800 followers 680 following
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Posts 27 Comments 23

OMG finally!

submitted 14 hours ago • 0 comments

I'm happy because this change means TypeScript defaults and Node defaults are converging 👍 Node does not support Import Elision which means it's important to enable "verbatimModuleSyntax" vMS means the developer knows if an import statement/binding will be deleted - all via the `type` keyword.

submitted 14 hours ago • 1 comment

Open source messaging remains an aspirational goal. Alas IYKYK

submitted 15 hours ago • 1 comment

TypeScript excitement 😉 Congrats to @searyanc.dev on landing big updates to the default tsconfig settings used by `tsc --init` 🎉 Defaults matter - and in TS 5.9 they embrace simplicity 💙 🔷 ESM (was CommonJS) 🔷 No down-leveling (was ES2016) 🔷 verbatimModuleSyntax: true github.com/microsoft/Ty...

submitted 15 hours ago • 6 comments

This is my favourite performance-enhancing JS feature ⚡ It allows ES modules to achieve laziness similar to inline require() in CJS modules, and adds safe handling of Top-Level Await 👍 It's an easy way to speed up existing codebases without introducing the async virality of dynamic import() 🦠

submitted 1 day ago • 0 comments

ECMAScript excitement 😉 Congrats to @nicr.dev @ryzokuken.bsky.social on landing support for TC39 Stage 3 `import defer` (Lazy Evaluation) in upstream TypeScript heading for TS 5.9 🎉 Thanks to @jakebailey.dev @danr.bsky.social @chronicles.org Wes Wigham for the reviews 👍 github.com/microsoft/Ty...

submitted 1 day ago • 1 comment

Good day in London so far. Finally got to catch up with @robpalmer.bsky.social in person! And caught @justinfagnani.com for a beer! 🙌

submitted 2 days ago • 1 comment

How it’s going with ESM vs CJS today: 29.6% of the popular packages on npm now includes ESM. Up from 28.8% a quarter ago. ESM-only is up from 10.8% to 11.5%. It’s perhaps all a bit soon after Node 18 became EOL on April 30, making `require(esm)` available everywhere. Maybe next quarter shows more

submitted 2 days ago • 5 comments

✋ [email protected] is out! - Browser Target Changed to Baseline Widely Available - Node 18 support dropped. Vite is now distributed as ESM only Plus fixes and deprecated feats removals, preparing for rolldown. Help us test the beta and report back 🙏 github.com/vitejs/vite/...

submitted 5 days ago • 2 comments

@goose.icu showing some benchmark numbers at @webengineshackfest.org

submitted 5 days ago • 2 comments

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

submitted 8 days ago • 1 comment

Today we are excited to announce Rolldown-Vite: a technical preview of the version of @vite.dev entirely powered by the Rust stack we built over the past year (Oxc + @rolldown.rs) voidzero.dev/posts/announ...

submitted 8 days ago • 3 comments

ECMAScript excitement 😉 This week TC39 advanced these proposals 🎉 4️⃣ Array.fromAsync 4️⃣ Error.isError 4️⃣ Explicit Resource Management: `using` 3️⃣ Immutable ArrayBuffer 2️⃣ Number.prototype.clamp 2️⃣ Seeded Pseudo Random Number Generator 1️⃣ Inspector 1️⃣ Keep Trailing Zeros 1️⃣ More Random Functions

submitted 8 days ago • 3 comments

ECMAScript excitement 😉 Congrats to @jakob.jingleheimer.dev on advancing the Inspector proposal to Stage 1 at TC39 today 🎉 Inspector is a subset of the larger Comparisons/Assertions proposal. It tackles the problem space of printing failed comparisons of objects 👍 github.com/JakobJingleh...

submitted 8 days ago • 0 comments

ECMAScript Excitement 🎉 Today, TC39 advanced these proposals: 2️⃣ Math.clamp 2️⃣ Seeded Pseudo-Random Numbers 1️⃣ Random Functions

submitted 9 days ago • 0 comments

We're about to begin our next JSR open office hours. Come with questions and we'll share the upcoming roadmap! discord.gg/Xr2a5pHx?eve...

submitted 9 days ago • 0 comments

This is so random! and muuuuch needed A new Random namespace with 22 methods for working with randomness in JavaScript. proposal just hit Stage 1

submitted 9 days ago • 15 comments

ECMAScript excitement 😉 Congrats to @goose.icu on advancing the Math.clamp proposal to Stage 2 at TC39 today 🎉 Math.clamp(number, min, max) constrains the number to be between the stated range 👍 github.com/tc39/proposa...

submitted 9 days ago • 2 comments

And now for something completely different:

submitted 9 days ago • 0 comments

ECMAScript excitement 😉 Congrats to @tabatkins.com on advancing the proposal for More Random Functions to Stage 1 at TC39 today 🎉 It provides a set of functions for proper generation of random numbers with control over ranges and distributions 👍 github.com/tc39-transfe...

submitted 9 days ago • 0 comments

ECMAScript excitement 😉 Congrats to @tabatkins.com on advancing the Seeded Pseudo-Random Numbers proposal to Stage 2 at TC39 today 🎉 It produces a series of pseudo-random numbers in a way that can be reproduced across program runs and different JS realms 👍 github.com/tc39/proposa...

submitted 9 days ago • 6 comments

Interested in Signals? Enjoy learning by reading code? Check out github.com/jkup/learn-s...

submitted 9 days ago • 4 comments

As many of you know, I have set myself a mission in 2025 to try and raise £50,000 for education-related charities that are equipping young people as they navigate those tricky years into adult life and work. Thank you for all the support so far! - all details at www.givewheel.com/fundraising/...

submitted 9 days ago • 0 comments

The Chrome DevTools Performance panel just leveled up! 🚀 Here's a 69-second taste of the new hotness.

submitted 10 days ago • 8 comments

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

submitted 10 days ago • 0 comments

ECMAScript excitement 😉 Congrats to @chronicles.org on conditionally advancing Explicit Resource Management to Stage 4 at TC39 today 🎉 It introduces `using` declarations and the Symbol.dispose protocol to deterministically and ergonomically release resources 👍 github.com/tc39/proposa...

submitted 10 days ago • 1 comment

ECMAScript excitement 😉 Congrats to champion JS Choi on conditionally advancing TC39 proposal Array.fromAsync to Stage 4 at TC39 today 🎉 It's like Array.from & works with async iterators. It's like the npm pkg it-all. It eliminates needing an adhoc for-await-of loop 👍 github.com/tc39/proposa...

submitted 10 days ago • 2 comments