delighted to see another framework with multi-bundler support @nuxt.com 🤝 @tanstack.com

Today on the pod: Astro 6.4's new Markdown processor API, Rust tries to tackle LLM nuances, and several TC39 proposals advance to Stage 4. Community shares tips for TS performance optimization, secure npm publishing & even an Object.assign oddity. share.transistor.fm/s/f267ca99 #typescript

This article explains why many Bloomberg engineers choose to stay with the company for a long time. leaddev.com/career-devel...

I hope you are all well and happy. As is my tradition, I've written a little about what's happening with me. A heads up, it talks about my treatment, and that's not everyone's idea of a good time. But if you're curious about my life then this is for you johnnyreilly.github.io/reillys-on-t...

Today on the pod: Deno's Claw Patrol security firewall, npm's response to supply chain attacks, Google I/O updates, and insights on AI's impact on open source. share.transistor.fm/s/3628c66c #typescript

🌲Rspack's tree shaking just got smarter 🦀 Two recent optimizations remove more unused code: 1. Inlined booleans can make branch-local dependencies inactive 2. Namespace default re-exports now preserve property-level usage More precise bundles, less dead code

ECMAScript gratitude 😉 Huge thanks to @dmitrymakhnev.bsky.social for arranging to host this week's @tc39.es meeting in Amsterdam at @jetbrains.com 🙏 Dmitry was super thoughtful about all the details and an excellent communicator throughout.

. @tc39.es panel at AmsterdamJS

. @tc39.es panel at TG5 hosted at TU Delft

1/ JavaScript: It’s nice to see all the new Iterator proposals: • iter.chunks(): returns an iterator over tuples • iter.includes(): same as arr.includes() • iter.join(): same as arr.join() • Iterator.range(): returns an iterator over integers github.com/tc39/proposa...

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! 🥳👏🙌 👇

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

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... 👇

`import defer` is the new ES2025 syntax for lazy module loading. Deno is the first runtime to ship it and with TypeScript support. Big win for CLI startup and conditionally-loaded code.

ECMAScript excitement 😉 Deno 2.8 is the first runtime to ship support for @tc39.es Stage 3 `import defer` 🎉 It lets you explicitly annotate an import to request lazy evaluation which can speed up module loading 👍 Docs: docs.deno.com/runtime/fund...

Today on the pod: Deno 2.8 hits 75% Node compat, Rolldown 1.0 ships, and we dive into supply chain security. Plus: SpacetimeDB's JS engine beats Rust, why scrapping custom DSLs for TypeScript wins, and Effect for AI agents. share.transistor.fm/s/8a2d7b84 #typescript

'using' is probably the biggest change in a while that will be visible in code bases very quickly. It's just sugar but I like it, slightly awkward keyword notwithstanding

💡 Use "using" for Vitest/Jest mocks/spys It's really nice to simplify You don't need manual mockReset / global afterEach cleanups anymore

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

ECMAScript excitement 😉 Congrats to Keith Miller on advancing Atomics.pause to Stage 4 at @tc39.es today 🎉 Atomics.pause(IterationNumber) permits short finite-time spin locks on the main thread whilst remaining CPU-efficient 👍 github.com/tc39/proposa...

ECMAScript excitement 😉 Congrats to @michael.ficarra.me on advancing Joint Iteration to Stage 4 at @tc39.es today 🎉 It provides synchronized iteration over multiple iterators. 🔸 Iterator.zip vends an array per-iteration 🔸 Iterator.zipToObjects vends an object per-iteration

Speeding up the JS ecosystem OXC edition 🚀 We made both oxfmt and oxlint 50% faster on projects with >50k directories. marvinh.dev/blog/speedin...

Axel is perhaps the most professional and diligent JS educating author. I remember when it felt like a new JS feature wasn't "done" until he had written the corresponding explainer article. You can thank him by buying his books 📚

Today on the pod: Rust ports galore, Remix 3 beta ready, critical security PSAs, and community highlights including Zork in TypeScript+React, TSRX templating, and more. share.transistor.fm/s/f1084941 #typescript

enjoy 2 new blog posts! - Porffor now has closures: surprisingly annoying for a compiler. goose.icu/porffor-clos... - Profile-guided dead code elimination: a novel approach for DCE in dynamic languages. goose.icu/profile-guid...

Are you coming to @igalia.com's @webengineshackfest.org ? Have something you'd like to talk with people about or show off? Missing W3C breakouts? We have them too! Submit a breakout: github.com/Igalia/weben...

🚀 tsdown v0.22 is out, now powered by Rolldown 1.0.0! What’s new: ✦ Upgraded to Rolldown v1.0.0 ✦ Reduced install size by 1.33 MB ✦ Auto-detects the `bin` field ✦ Dropped support for Node.js 20, 21, and 23 ✦ `dts` is now inferred from `compilerOptions.declaration` github.com/rolldown/tsd...

🚀Rolldown 1.0 is here!🚀 Rust-based high-performance JavaScript bundler. 🏎️ Runs at native speed that’s up 30x faster than Rollup 🤝 Compatible with existing Rollup & Vite plugins ⚡The underlying bunder for Vite After 2 years, Rolldown is officially stable and has 20+M weekly downloads.

We will have achieved AGI when Gemini can appreciate my jokes. (Also, it's important to give your agents closure when they help you with projects around the home.)

ECMAScript excitement 😉 Node v26 ships V8 v14.6 which introduces support for: 🔶 Temporal 🔶 Map.prototype.getOrInsert 🔶 Iterator.concat

@vitest.dev is going framework agnostic, and we need your feedback!

The 2026 Node.js London Collaboration Summit trip report is officially live! 🚀 We gathered 50+ contributors to discuss the biggest technical shifts coming to the runtime. Big thanks to Bloomberg for hosting! 🇬🇧 Check out the full recap and recordings here: https://bit.ly/3OHPLmz

The Web Frameworks Community Group now has over 60 members representing Alpine, Astro, Ember, Lit, Lustre, Marko, Preact, Qwik, React, Ripple, Solid, Stimulus, Svelte, Vue, Web Components, htmx, and more! Did I miss your favourite? Come join us and represent! discord.com/invite/fXCng...

Ecma is the home of TC39 - the committee that defines JavaScript. Ujjwal's blog post explains how the Standards Developing Organisation (SDO) works.

I've been working for a long time alongside different folks to spread the word about web standards, how JavaScript is standardized and help improve how responsive we are to the needs of developers. For more @tc39.es lore, read my first post in "What even is Ecma?" www.ryzokuken.dev/blog/about-e...

There's a new #webperf measurement API in the works! Check out this post looking at the work @jason-williams.co.uk and @jdapena.bsky.social have been putting into there Container Timing—available as an origin trail from Chrome 148 (rolling out next week). developer.chrome.com/blog/contain...

Container Timing is a new browser performance API for measuring when an area of a web app has been displayed. It is available in an Origin Trial in Chrome 148 🎉 Read the blog post below to learn more 👇

I'm happy to announce Thales, a TypeScript compiler and JS engine in Lean. Thales compiles a subset of TypeScript to Lean via a shallow embedding. Thales is a bridge for TS programmers into Lean's program verification toolset. Check out github.com/jessealama/t... to get started.

ECMAScript excitement 😉 Congrats to @bartlomieju.bsky.social on landing experimental (flagged) support for @tc39.es Stage 3 Import Defer in upstream Deno 🎉 import defer * as lazyNs from "expensive"; Module evaluation is delayed until the first namespace access. github.com/denoland/den...

@npmx.dev is 3 months old! It feels both yesterday and an eternity ago. Time is strange when we have fun, and the landscape around us changes every day. Pieces are falling into place for npmx's next iteration. It's a great time to get involved if you're looking for a good open source adventure ✌️

Node excitement 😉 Congrats to @targos.dev on landing the V8 14.6 upgrade in upstream Node, heading for Node v26 which will be released very soon 🎉 This is the first version of V8 in Node to support unflagged Temporal 👍 github.com/nodejs/node/...

porffor.dev is now served by a Porffor-compiled TS native binary!

I say it every year - if you're even the least bit interested or involved in web performance, this is THE place to be every year. It's the one trip I prioritize my travel budget for. The talks are awesome, but the hallway track is unbeatable. The concentration of experts in one place is insane.

Missed my #BlinkOn lightning talk? The video is now live! 🎥 Check out the 2026 update on Container Timing here: youtu.be/GrjqanVGKVM?... cc @igalia.com #WebPerf

TypeScript 7.0 Beta is out 🎉 It's the 10x faster Go-based port 🔥 🔷 `tsgo` vs `tsc` CLIs allow comparing 🔷 --checkers sets checker thread count 🔷 --singleThreaded keeps parsing/emit/checking together 🔷 TS 6.0 deprecations are hard errors 🔷 API access is planned for TS 7.1

#BlinkOn 21, day 2! ⚡ Catch my lightning talk on the 2026 Container Timing updates today at 3:30 pm PDT. I will not be on site, but will be available in the stream chat, and in Slack.

New blog post: our colleague Caio worked on extending V8’s memory profiler API with a new metric: the total number of bytes allocated by an Isolate since its creation: blogs.igalia.com/weblanguages...

Wanna measure Core Web Vitals for SPAs? It's been a long-standing gap, but one that we've been working hard to fill. We're approaching the final stages and have launched one last origin trial (🤞) as the "last call" before we ship it! More details: developer.chrome.com/blog/final-s...

Für alle deutschsprachigen JS Leute hier is mein Gespräch mit Working-Draft über Temporal workingdraft.de/708/