ECMAScript excitement 😉 Congrats to James Snell on advancing Typed Array Find Within to Stage 1 at @TC39 today 🎉 It aims to provide a native indexOf operations for Typed Arrays.

Have any .NET devs heard of or used Jint before? I prototyped some ideas years ago with it. Cool to see it still well maintained and all the ECMAScript features supported now.

ECMAScript 2026 (the Javascript spec) has a Promise.try() If you pass a sync method to it, it will execute it immediately. It won't schedule it for the next microtask like Promise.resolve.then() does.

一部の開発ツールでは「JavaScript」ではなく「ECMAScript」という名称を使わざるを得ません。理由は単純で、JavaScriptの商標をOracleが握っているからです。

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ECMAScript excitement 😉 Congrats to my coworker @acutmore @TechAtBloomberg on advancing Await Dictionary to Stage 2.7 at @TC39 today 🎉 Promise.all returns positional results as an array. Promise.allKeyed allows named results inside an object 👍

I still cringe thinking about that time in a job interview that I said reading ECMAScript gave me a headache… only to discover my interviewer was one of the authors of ECMAScript.

ECMAScript 1-3 timeline #jsconfjp

ECMAScript excitement 😉 This week TC39 advanced these proposals 🎉 4️⃣ Intl.Locale Info 4️⃣ Iterator.concat 4️⃣ JSON.parse Source Txt 3️⃣ https://t.co/2zSc2BgbUo 2️⃣.7️⃣ Iterator.prototype.join 2️⃣.7️⃣ Promise.allKeyed 2️⃣ Error.captureStackTrace 2️⃣ Import Text 2️⃣ Object.keysLength 🧵

PDF版で見ないとわからないECMAScript仕様のページ数、今は834ページもあるのか #jsconfjp

ECMAScript excitement 😉 Congrats to @NicoloRibaudo on advancing Intl Energy Units to Stage 1 at TC39 today 🎉 It provides three more units to work with Intl.NumberFormat for string formatting 👍

ECMAScript excitement 😉 Congrats to Ruben Bridgewater, @ljharb on advancing Object.keysLength to Stage 2 at @TC39 today 🎉 let count = Object.keysLength(o) It counts string-keyed own properties on an object & avoids the cost of an intermediate array in Object.keys(o).length

UPDATE: There's a 3-character version, and probably the most cursed JavaScript I've ever seen. Shoutout to @bedros_p for finding this one. Has to do with how HTML comments are treated in the ECMAScript spec.

アニメーション制作ソフト friction は、ECMAScript で動きを制御できる。 こういうのがいい。 描画から自力で書こうとしたら大変だけど、位置や大きさ傾きだけスクリプトでいじるのは簡単に書ける。 こういうのでいいんだよ。 https://t.co/FYtstVrC9B

As a JavaScript developer, master these 20 skills to stay relevant in the evolving job market: 1. JavaScript Fundamentals & Language Core — scoping, closures, prototypes, hoisting, `this`, strict mode 2. Modern ECMAScript & Syntax — ES6+ features: arrow functions, destructuring,

FYI, ECMAScript directives are StringLiteral according to the ES spec They are just a special kind of string literals (I'm not sure whether directives are a good or bad idea yet, just want to state a fact)

Nice! 50% of the 95 354 ECMAScript 262 tests now pass for https://t.co/YVcqWNCrtK Roughly 80% of the "Language Tests" now pass. 99%+ AI generated JS Engine in C# ps. JS is a really messed up language, just saying....

I read this book like the bible lol Good ol ECMAScript 5

ECMAScript excitement 😉 Congrats to Frank Tang on advancing Intl Locale Info API to Stage 4 at @TC39 today 🎉 It exposes Locale info such as week data (first day in a week, weekend start day, weekend end day), text direction, hour cycles, numbering systems, etc.