What’s New in ECMAScript 2025, by @pawelgrzybek:
pawelgrzybek.comWhat's new in ECMAScript 2025 | pawelgrzybek.com
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Paweł Grzybek
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#ecmascript
11 posts3 participants0 posts today
Talk about the upcoming Temporal API by one of its creators
@gitnationorg
https://gitnation.com/contents/temporal-the-curious-incident-of-the-wrong-nighttime
gitnation.comTemporal: The Curious Incident of the Wrong Nighttime by Philip ChimentoSpeaker's involvement in Temporal proposal and TC39 meetings for JavaScript standardization. Date conversion challenges faced in development. Addressing time zone discrepancies with Temporal to prevent bugs. Exploration of Temporal types and design philosophy. Usage of Java's time zone serialization in JavaScript Temporal. Challenges in implementing Temporal proposal and its transformative potential in ECMAScript.
Ecosystem Performance (e18e) community showcase: Prettier CLI, e18e CLI, ESM-only migration, and more
@e18e
https://e18e.dev/blog/community-showcase-q2.html
e18e.devCommunity Showcase (Q2 2025)An update on what the community has been up to in Q2 of 2025
esbuild v0.25.7: `import defer`, `import source`, and more
@evanw
https://github.com/evanw/esbuild/releases/tag/v0.25.7
GitHubRelease v0.25.7 · evanw/esbuildParse and print JavaScript imports with an explicit phase (#4238)
This release adds basic syntax support for the defer and source import phases in JavaScript:
defer
This is a stage 3 proposal for...
JavaScript microtasks and the event loop
https://codedynasty.dev/posts/JavaScript-Microtasks-A-deep-look-and-comparision-to-defer
CodeDynastyJavaScript Microtasks: A Comprehensive Guide and the Event LoopMaster JavaScript's microtask queue and queueMicrotask() API to build more responsive web applications with optimized rendering and state management
Bun v1.2.19: pnpm-style node_modules, interactive dependency management, and more
@jarredsumner
https://bun.com/blog/bun-v1.2.19
Bun · Bun v1.2.19Fixes 163 issues (addressing 1,043 👍). Introduces `bun install --linker=isolated` for pnpm-style isolated node_modules, `bun why` for dependency tree understanding, `bun pm pkg` commands for package.json management, enhanced `node:fs.glob()` with array patterns and exclude options, `node:module.SourceMap` class and `findSourceMap()`, smarter `@types/bun` with automatic Node.js compatibility detection, plus numerous Node.js compatibility improvements, runtime bugfixes, bundler enhancements, and bun install optimizations.
ream.js: functional datetime library with immutable data structures
https://www.npmjs.com/package/ream.js
npmream.jsA comprehensive, functional datetime library for JavaScript/TypeScript with immutable data structures, real IANA timezone database support, DST handling, and a plugin system. Latest version: 1.1.0, last published: 2 minutes ago. Start using ream.js in your project by running `npm i ream.js`. There are no other projects in the npm registry using ream.js.
Linear matching of JavaScript regular expressions
https://dl.acm.org/doi/10.1145/3656431
“Not invented here” (NIH) is far cheaper than the wrong dependency
https://lewiscampbell.tech/blog/250718.html
lewiscampbell.techNIH Is Far Cheaper Than The Wrong DependencyFrivilous dependencies are the enemy of maintainability.
CET I scored 13/28 on https://jsdate.wtf and all I got was this lousy text to share on social media.
But jokes aside, I had great fun—and quite a few headscratches, yaw drops, and sighs 
jsdate.wtfnew Date("wtf")How well do you know JavaScript's Date class?
Two of the nicest new #JavaScript features of recent times:
Iterator Helpers (`.values()`) and `Array.fromAsync()`
https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/fromAsync
MDN Web DocsIterator - JavaScript | MDNAn Iterator object is an object that conforms to the iterator protocol by providing a next() method that returns an iterator result object. All built-in iterators inherit from the Iterator class. The Iterator class provides a [Symbol.iterator]() method that returns the iterator object itself, making the iterator also iterable. It also provides some helper methods for working with iterators.
pnpm 10.13: easier plugin installation, loading multiple pnpmfiles, and more
@pnpm
https://github.com/pnpm/pnpm/releases/tag/v10.13.0
GitHubRelease pnpm 10.13 · pnpm/pnpmMinor Changes
Added the possibility to load multiple pnpmfiles. The pnpmfile setting can now accept a list of pnpmfile locations #9702.
pnpm will now automatically load the pnpmfile.cjs file fr...
Node.js v24.4.0 (current): fsPromises.mkdtempDisposable(), spawn() propagates permission flags, SQLite options per connection, and more
@nodejs
https://nodejs.org/en/blog/release/v24.4.0
nodejs.orgNode.js — Node v24.4.0 (Current)Node.js® is a free, open-source, cross-platform JavaScript runtime environment that lets developers create servers, web apps, command line tools and scripts.
Promise.all() vs. Promise.allSettled() in JavaScript
https://spin.atomicobject.com/managing-the-state-of-your-promises/
Atomic Spin · Managing the State of Your PromisesWith Promise.all, a bundle can be rejected due to one failed promise. Instead, use Promise.allSettled to manage the state of your promises.
ESLint v9.31.0: support for explicit resource management in core rules and more
@eslint
https://eslint.org/blog/2025/07/eslint-v9.31.0-released/
eslint.orgESLint v9.31.0 released - ESLint - Pluggable JavaScript LinterA pluggable and configurable linter tool for identifying and reporting on patterns in JavaScript. Maintain your code quality with ease.
Biome 2.1: faster scanner, improved type inference, new rules and more
@biomejs
https://biomejs.dev/blog/biome-v2-1/
BiomeBiome v2.1
Modern async iteration in JavaScript with Array.fromAsync()
https://allthingssmitty.com/2025/07/14/modern-async-iteration-in-javascript-with-array-fromasync/
allthingssmitty.com · Modern async iteration in JavaScript with Array.fromAsync() - Matt SmithJavaScript's 'Array.fromAsync()' offers a concise alternative to 'for await...of' when working with async iterables and streams.
Bundling JavaScript via scope hoisting is broken
@devongovett
https://devongovett.me/blog/scope-hoisting.html
devongovett.meJavaScript scope hoisting is brokenModern JavaScript bundlers commonly implement two optimizations: scope hoisting, and code splitting. In this post, I'll discuss how these are fundamentally at odds with each other.
Biome 2.1: faster scanner, improved type inference, new rules and more
@biomejs
https://biomejs.dev/blog/biome-v2-1/
BiomeBiome v2.1