JavaScript Infrastructure & Tooling at Bloomberg. Co-chairing TC39. Likely to tweet tech stuff about JS & software performance. Opinions are my own.https://bsky.app/profile/robpalmer.bsky.socialhttps://bsky.app/profile/robpalmer.bsky.social/post/3ml4y7cvhxc2tECMAScript excitement 😉 Node v26 ships V8 v14.6 which introduces support for: 🔶 Temporal 🔶 Map.prototype.getOrInsert 🔶 Iterator.concat [contains quote post or other embedded content]05 May 2026 20:03 +0000at://did:plc:w227epg3attqnssfdkx6ex6a/app.bsky.feed.post/3ml4y7cvhxc2thttps://bsky.app/profile/robpalmer.bsky.social/post/3mkvebsee3c2uEcma is the home of TC39 - the committee that defines JavaScript. Ujjwal's blog post explains how the Standards Developing Organisation (SDO) works. [contains quote post or other embedded content]02 May 2026 19:18 +0000at://did:plc:w227epg3attqnssfdkx6ex6a/app.bsky.feed.post/3mkvebsee3c2uhttps://bsky.app/profile/robpalmer.bsky.social/post/3mktdxf6m222uContainer 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 👇 [contains quote post or other embedded content]02 May 2026 00:07 +0000at://did:plc:w227epg3attqnssfdkx6ex6a/app.bsky.feed.post/3mktdxf6m222uhttps://bsky.app/profile/robpalmer.bsky.social/post/3mknwdmpwv22eECMAScript 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. https://github.com/denoland/deno/pull/3236029 Apr 2026 20:20 +0000at://did:plc:w227epg3attqnssfdkx6ex6a/app.bsky.feed.post/3mknwdmpwv22ehttps://bsky.app/profile/robpalmer.bsky.social/post/3mkb5zslyxk2jNode 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 👍 https://github.com/nodejs/node/pull/61898#issuecomment-431454120724 Apr 2026 18:33 +0000at://did:plc:w227epg3attqnssfdkx6ex6a/app.bsky.feed.post/3mkb5zslyxk2jhttps://bsky.app/profile/robpalmer.bsky.social/post/3mjzqfjclcs25TypeScript 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 [contains quote post or other embedded content]21 Apr 2026 19:40 +0000at://did:plc:w227epg3attqnssfdkx6ex6a/app.bsky.feed.post/3mjzqfjclcs25https://bsky.app/profile/robpalmer.bsky.social/post/3mjlvvl4tos2xCongrats to @heimskr.io at Apple (previously at Bun) on landing this complex & critical JS ecosystem fix in WebKit's JSC 👍 [contains quote post or other embedded content]16 Apr 2026 07:41 +0000at://did:plc:w227epg3attqnssfdkx6ex6a/app.bsky.feed.post/3mjlvvl4tos2xhttps://bsky.app/profile/robpalmer.bsky.social/post/3mjkomerfx22xECMAScript excitement 😉 JSC just landed a long-planned rewrite of their ESM module loader that will fix multiple famous spec bugs including those holding back ES2022 Top-Level Await 🎉 JSC is the JS engine used in Safari and Bun. https://github.com/WebKit/WebKit/pull/5782715 Apr 2026 19:58 +0000at://did:plc:w227epg3attqnssfdkx6ex6a/app.bsky.feed.post/3mjkomerfx22xhttps://bsky.app/profile/robpalmer.bsky.social/post/3mjico6mos22qHe's in a feta place [contains quote post or other embedded content]14 Apr 2026 21:19 +0000at://did:plc:w227epg3attqnssfdkx6ex6a/app.bsky.feed.post/3mjico6mos22q