The details of TC39’s last meeting

#​744 — July 11, 2025

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JavaScript Weekly

Vercel Acquires NuxtLabs — Vercel has acquired the company that caretakes the Nuxt project and employs some of its core team – a move Vue creator Evan You is quite optimistic about. Vercel now manages, or at least supports, several key projects like Next.js, Turborepo, Svelte, and shadcn/ui. Nuxt itself remains open source and has a promising future. Vercel’s Guillermo Rauch shares a little more about the move here.

NuxtLabs / Vercel

💡 Daniel Roe, leader of the Nuxt team, answered lots of questions about the acquisition on Reddit.

FlexGrid by Wijmo: The Industry-Leading JavaScript Datagrid — A fast and flexible DataGrid for building modern web apps. Key features and virtualized rendering are included in the core grid module. Pick & choose special features to keep your app small. Built for JavaScript, extended to Angular, React, and Vue.

Wijmo From MESCIUS sponsor

A Detailed Summary of the Latest TC39 Plenary — A thorough roundup of May’s major ECMAScript committee meeting with far more detail about each proposal’s development and the decisions made than we usually get to hear about. Topics include Array.fromAsync, explicit resource management, the Temporal API, and some brainstorming around AsyncContext.

Igalia Compilers Team

IN BRIEF:

• TypeScript 5.9 Beta has been released with support for deferred module evaluation by using import defer.

• The Nginx HTTP server has a module (njs) for extending its functionality using JavaScript, but it only supported ES5. Now, njs uses QuickJS for a more modern, powerful experience with full ES2023 support.

• Got some time to kill? There’s one week left to submit an entry to the JS1024 annual JavaScript golfing competition. Create a cool JS or GLSL program in under 1024 bytes.

• Oliver Stenbom reflects on the prevalence of Rust in modern JavaScript ecosystem tooling.

RELEASES:

• Node.js v24.4.0 (Current) – Note that new versions of all maintained Node.js releases are due next week due to some security vulnerabilities.

• Oxlint 1.6 – Rust-powered linter for JS and TS.

• VS Code v1.102, Ember 6.5, Angular 20.1

📖  Articles and Videos

What’s the Difference Between Ordinary Functions and Arrow Functions? — This sounds like basic stuff, but James always does a good job of digging in and explaining things in a way that gives you a more nuanced way to think about a concept, even if it’s just “Which function declaration syntax should I use?”

James Sinclair

💡 His guide to how to compose JS functions that take multiple parameters is also worth revisiting.

Embrace Web RUM Provides User-Focused Observability — Get session timelines, Core Web Vitals and JS exceptions in context, and user journey analysis with issue correlation.

Embrace sponsor

JavaScript Scope Hoisting is Broken — The creator of Parcel argues that scope hoisting (when bundlers inline modules into a shared scope) conflicts with modern JS patterns like code splitting and dynamic imports, causing subtle bugs and offering little benefit, so he’s considering removing it in Parcel v3.

Devon Govett

Codepoint–Safe Truncation: Fixing Emoji Slicing — An app’s CSV importer kept breaking on emoji-filled rows, triggering errors. James demonstrates how swapping slice for a code-point–aware spread fixes it.

James Mulholland

📄 Parsing 1 Billion Rows in Bun in Under 10 Seconds Tae Kim

📄 Loosely Synchronize Your JS Stores in Multiple Tauri Processes – Tauri is a bit like a Rust-flavored Electron for building cross-platform native apps. Costa Alexoglou

📄 Managing the State of Your Promises – On the potential of Promise.all and Promise.allSettled. Lydia Cho

📄 When Can I Use Temporal? – “If Brendan Eich can invent .. JavaScript in 10 days, why has it taken eight years to replace the Date API?” John Dalziel

📄 Is It Still Worth Using jQuery in 2025? Suren Enfiajyan

🛠 Code & Tools

Driver.js: Tours, Highlights, Contextual Help, and More — A vanilla JS library for making on-page tours and contextual help systems. It’s been around for several years, but is still maintained, and there are lots of examples to check out – it’s really smooth.

Kamran Ahmed

jsonrepair: Repair Invalid JSON Documents — This has lots of possible use cases, including dealing with weird JSON coming back from LLMs or non-compliant JSON spat out by poorly built software. You can use it from Node, as a CLI tool, or try a basic version online.

Jos de Jong

🤡 In barely related news, someone has turned JSON into its own programming language. Oh, the horror!

Server-Side Support for MCP in Next.js — Server-side MCP just got easier in Next.js. One route, no extra infra—Scorecard cut 1,000 lines to just 70.

Clerk sponsor

line-numbers: A Web Component to Add Line Numbers Next to Various HTML Elements — Useful for custom apps that show source code or other snippets that require line numbering. See examples here, which demonstrate the flexibility customization options for the line numbering.

Zach Leatherman

cRonstrue 3.0: Convert Cron Expressions into Natural Language — Not just English either – it supports about thirty locales. There’s also an online demo.

Brady Holt

• Next.js Boilerplate 5.0 – Boilerplate starter app for Next.js with auth, database support, i18n, forms, and more.

• 🔎 React Scan 0.4 – Scan for performance issues and eliminate slow renders in your app.

• 🎹 html-midi-player 1.6 – Play and display MIDI files on the web.

• CKEditor5 46.0 – Popular commercial rich text editor framework.

• 📊 Recharts 3.1 – D3-powered chart library for React.

• Vuetify 3.9 – Vue component framework.

👀  Elsewhere…

Here’s a selection of things from the broader ecosystem this week:

• As of Chrome 137, you can try out CSS inline conditionals using the new if() function.

• Did you know you can generate efficient SVGs that feel like GIFs and even use them in your GitHub README.md files?

• On Reddit, an ex-Meta engineer posted an interesting comment about how Meta / Facebook serves up React as part of the main Facebook site.

• PlanetScale has shared a neat interactive article about caching that visually demonstrates the benefits of caching from several different angles, right down to the CPU level.

• 𝕏 Claude Code is now a single-file executable thanks to Bun.

• ANSI.tools is a handy online tool for analyzing ANSI escape codes/sequences and a lookup of common codes.