fidzu : javascript

#​789 - June 9, 2026

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JavaScript Weekly

VoidZero is Joining Cloudflare - One of the year's big moves in JS tooling, as told by Evan himself. The company he founded to build Vite, Vitest, Rolldown, Oxc, etc. is joining Cloudflare. He's candid about why (monetization is hard). Good news: all projects stay MIT-licensed, and Evan and co remain in charge.

Evan You

💰 In the Vite team's post, they reveal Cloudflare is starting a $1 million fund to support Vite ecosystem maintainers and contributors.

Come for Great PostgreSQL Talks - Virtual and Free - Attend talks about PostgreSQL-backed app development at POSETTE: An Event for Postgres 2026 (16-18 June). Join live and chat directly with PostgreSQL speakers, other developers and users. There is also swag waiting for you. Register for updates.

Microsoft | AMD sponsor

Announcing Angular v22 - Google's batteries-included framework graduates three big features to stable/production-ready: Signal Forms, Angular Aria, and asynchronous reactivity. The router also adds experimental support for the native browser Navigation API.

The Angular Team

IN BRIEF:

• Safari 27 (beta), announced at WWDC, includes a standards-compliant ESM loader rewrite improving top-level await support, and adds support for JSPI (JavaScript Promise Integration) in WebAssembly.

• Electron 43 is in beta with big perf boosts, thanks to an embedded Node.js snapshot, bundles cached as V8 bytecode, and link-time optimization on the main binary.

• The Rust port of React Compiler is ready to test (Meta is already seeing "great results") - it's set to be merged imminently.

RELEASES:

• TanStack Table v9 Beta - A powerful headless engine for creating data grids with support for React, Preact, Solid, Vue, Angular, Svelte, and Lit.

• Node-RED 5.0 - 'Low-code' flow programming environment, built on Node.js.

• Rolldown 1.1, pnpm 11.5, RunJS 4, Emscripten 6.0

📖 Articles and Videos

Modern Engineering Values - "I cannot believe that I used to write code by hand!" The creator of Jest and Fate says that as agents write more software, the engineering values that matter shift, with ownership, taste, and strict-but-fast feedback loops at the fore.

Christoph Nakazawa

'I Wish Deno Would Keep Doing What It Does Best' - A Deno fan argues that chasing Node.js/npm compatibility is costing the runtime its edge as a zero-config, web-standards, all-in-one-binary experience.

Hong Minhee

How Is Your App Performing in Production? - Ship a release this morning. By tonight you can know if the app got faster, slower, or worse for any specific cohort of users.

Expo sponsor

What Bun Can Tell Us About AI and Open Source - An analyst looks at Bun, whose code is increasingly AI-produced rather than human-written, as a bellwether for whether AI-authored core infrastructure is sustainable.

Stephen O'Grady (RedMonk)

📺 All 17 TanStack Projects in One App - TanStack is now a huge suite of libraries, and if anyone can pull them all into one app, Jack can! Jack Herrington

📄 Everything You Need to Know About Source Maps Neciu Dan

📄 How TypeScript Infers Type Variables Nicolas Laurent

🛠 Code & Tools

Geometric.js: A Library for Doing Geometry - Created by someone who works on graphics for the NYT, this elegant library lets you work with polygons, bounding boxes, reflection, interpolation, rotation, and the like (examples). Does one polygon intersect with another? There's a function for that.

Harry Stevens (The New York Times)

Ship Real-Time Features Without a Second Database - TimescaleDB extends Postgres for live analytics on event data. No pipeline, no extra infrastructure. $1000 credit.

Tiger Data (creators of TimescaleDB) sponsor

Micromodal.js: A Tiny Library for Accessible Modal Dialogs - No-dependency library for WAI-ARIA guideline-compliant modal dialogs. Offers extra polish versus <dialog>, with hooks, scroll-locking, in/out transitions, and click backdrop to dismiss.

Ghosh and Singh

📝 PDFSlick 4.0: View and Interact with PDFs in JS Apps - A PDF viewer for React, Solid, Svelte & vanilla JS apps that goes from simple PDF viewing up to working with multiple, large documents with annotations. Demo.

Vancho Stojkov

babel-plugin-zod-hoist: Hoist Zod Schema Definitions to the Top of the File - From the creator of Slonik comes a way to make Zod validation significantly faster.

Gajus Kuizinas

• eslint-plugin-functional 10.0 - Linter rules to disallow mutation and encourage functional programming.

• ts-loader 9.6 - The TypeScript loader for webpack adds webpack 4 support back again.

• 🧊 Draco.js - A pure JS Draco mesh loader for three.js by mrdoob himself. (Demo.)

• Taiga UI 5.10 - Popular suite of 50+ components for Angular.

📢 Elsewhere in the ecosystem

• Oxide Computer Company's Mitos ASCII Tool (above) converts images into ASCII text illustrations and animations, by way of a built-in livecoding environment (built upon the fantastic play.core).

• 🔁 replacements.fyi, from the e18e team, is a handy way to find replacements for npm packages of your choice, whether that's a simpler package, a code snippet that does the same thing, or a native API.

• ⚡ Add Obs.js to a page and it adds classes to <html> to customize the UX based on how much performance is available (e.g. bandwidth, CPU, latency). Harry Roberts explains further.

• 🕹️ Raymond Camden set out to see if Chrome's built-in AI could play Zork 1, the classic text adventure game.

#​788 - June 2, 2026

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JavaScript Weekly

Hocuspocus 4: Add Real-Time Collaboration to Any App - A plug-and-play real-time collaboration backend based on Yjs so you can quickly and safely wire up multi-user collaborative experiences into a JavaScript app. It runs on Node, Bun, Deno, or Cloudflare Workers. GitHub repo.

Tiptap

Still Writing Tests Manually? Meticulous AI Is Here - Notion, Dropbox, Wiz and LaunchDarkly now use a testing paradigm they can't work without. Built by former Palantir engineers, Meticulous automatically creates an evolving suite of E2E UI tests, delivering exhaustive coverage with no developer effort.

Meticulous sponsor

How to Evaluate an npm Package: 2026 Edition - A practical checklist for vetting packages beyond star counts, covering provenance attestation, install scripts, CI quality, and maintainer responsiveness. Learn to spot the red flags before you npm install.

Gabor Koos

IN BRIEF:

• 🕒 The popular date-fns date utility library is preparing for a Temporal shaped future and becoming a "Temporal-first library". For now, a much leaner v4.4 is available, and v5.0 just entered alpha.

• 🔒 In the latest surfacing of Shai-Hulud, dozens of Red Hat npm packages have been backdoored.

• npm 11.16.0 has shipped with initial (advisory warning only) support for an opt-in install-script policy using allowScripts. More details here.

• The Svelte team presents its latest monthly update.

RELEASES:

• Ember 7.0 - A major release for the long-standing framework to remove deprecated features. This post rounds up everything new since 6.0.

• Node.js 26.3.0 (Current) - npm is upgraded to 11.16.0, macOS x64 gets demoted to a tier 2 platform, and QUIC gets a big batch of improvements.

• Astro 6.4 - The web framework adds a pluggable Markdown pipeline, a Rust-based Markdown processor, and helpers for advanced routing on Cloudflare.

• pnpm 11.5.0/11.5.1, ESLint 10.4.1, Angular 22 RC3

📖 Articles and Videos

🤖 Using AI to Write Better Code More Slowly - A prolific JavaScript developer says LLMs aren't just for pumping out bad code quickly, they can indeed help you write higher quality code more slowly.

Nolan Lawson

TypeScript Tips Everyone Should Know - A concise set of tips for safer and cleaner code, as well as a reminder that while TypeScript can improve correctness, it doesn't guarantee good architecture or eliminate runtime bugs.

Matt Smith

Your Partition Scheme Made Sense. Then the Data Got Big - TimescaleDB extends Postgres so analytics queries stay fast at scale. No pipeline, no second database. $1000 credit.

Tiger Data (creators of TimescaleDB) sponsor

Intentionally Blocking Rendering with JavaScript - "Sometimes an inline render-blocking script is a small price to pay for avoiding aggressive layout shifts."

Jay Freestone

Why Does tsgo Use So Much Memory? - A look into the Go-powered TypeScript 7 compiler and why it can chew through gigabytes on a large project.

Zack Radisic

📄 CSS vs. JavaScript for Web Animations - Underlying performance differences and guidance on when to pick which approach. Josh W. Comeau

📄 Your Recursion is Lying to You - ES2015 specified tail call optimization, but most engines in 2026 don't support it. Gabor Koos

📄 How We Cut Build Times by Two-Thirds by Deleting Our CMS - The story of Sentry's Gatsby to Astro migration. Eli Lennox (Sentry)

📄 Creating a VS Code Agent Hook to Respond to File Changes Nicholas C. Zakas

🛠 Code & Tools

📊 Plotly 3.6: The Declarative Graphing Library - A long-standing library, also widely used in the Python and R ecosystems, that offers over 50 visualization types, from basic charts and graphs to maps, plots, and heatmaps.

Plotly, Inc.

Expo UI Is Stable. Real SwiftUI and Compose from JS - One import. SwiftUI on iOS, Jetpack Compose on Android. Plus native drop-in replacements for 7 community packages.

Expo sponsor

Component Party: A Rosetta Stone of UI Libraries - A side-by-side code snippet comparison of frameworks including React, Vue, Svelte, Angular, Ember, and more obscure options. Recent updates have extended Angular and Svelte coverage, plus added Ripple and Ember Polaris to the mix.

Mathieu Schimmerling

🎉 tsParticles 4: A Particle Engine for Web Effects - If you want a confetti cannon, fireworks, ribbons, fireflies, snow, or similar effects on your pages, this is for you. Supports all major frameworks and vanilla JS. You can see some live demos here.

Matteo Bruni

• 📝 officeParser 7.1 - Parse 'office' files (e.g. docx, pptx, xlsx, odt) into an AST. The in-browser demo shows off what's returned.

• 🔎 Fuse.js 7.4 - JavaScript fuzzy-search library. v7.4 adds support for parallel search powered by Web Workers. (Homepage)

• ESLint You Might Not Need An Effect 1.0 - ESLint/Oxlint plugin to catch when you might not need an Effect in React.

• PGlite 0.5 - Run a Postgres database locally in WASM with reactivity and live sync. v0.5 upgrades to Postgres 18.3.

• TinyBase 8.4 - A reactive data store and sync engine for local-first apps. Now with full SolidJS support.

• Sugar High 1.2 - 1KB syntax highlighter for JavaScript and JSX.

• Mantine 9.3 - Popular, extensive React component suite.

📢 Elsewhere in the ecosystem

• Programming language legend ▶️ Anders Hejlsberg was on The Pragmatic Engineer talking about his background, work on TypeScript, JavaScript's strengths and weaknesses, and how he uses AI.

• Kyle Simpson (of YDKJS fame) got in touch minutes before we hit send to let us know about @gql-x/Composer, a new library he's working on that's a JavaScript DSL for dynamically composing GraphQL query strings.

• A new way for sites to sneakily track users with JavaScript has been demonstrated. It involves analyzing SSD usage by using the Origin Private File System feature.

• 🤖 The results of the State of Web Dev AI 2026 survey are ready to enjoy with stats on AI use from over 7,000 developers.

#​787 - May 26, 2026

Read on the Web

JavaScript Weekly

JS Crossword: All the Answers are JavaScript - This hand-crafted puzzle will seriously stretch your JavaScript knowledge. I've seen so many people on social media either cheering having finished it or cursing being stuck…

Lyra Rebane

💡 I've put some (educational!) tips at the end of this issue.

Expo UI Hits Stable: Native iOS & Android from One Import - From a single import, @expo/ui ships SwiftUI on iOS and Jetpack Compose on Android with the real platform components underneath. SDK 56 also lands native drop-in replacements for seven common React Native community packages.

Expo sponsor

Staged Publishing for npm Packages Goes Live - npm's 'staged publishing' model provides a review period with approval required before packages go live on the npm registry. Both npm 11.15.0 and pnpm 11.3 have added support.

The npm Project

💡 In this broader writeup, GitHub also introduced npm's new --allow-* options to control over where npm is allowed to source packages from.

IN BRIEF:

• Firefox has added Web Serial support in Firefox 151 so you can connect to microcontrollers, 3D printers, and other serial-connected hardware from JS.

• Mozilla's Ryan Hunt says goodbye to asm.js as Firefox's JS engine now disables optimizations for it by default.

• 🤖 Modern Web Guidance is a suite of expert-vetted skills to guide agents in building modern web experiences, e.g. "begin preloading pages when users hover over important links."

• TC39 held its latest meeting last week - a roundup is due soon.

RELEASES:

• Storybook 10.4 - the frontend component workshop - has added first-class TanStack React support and the ability for agents to set up Storybook in complex apps.

• Node.js v26.2.0 (Current) and v24.16.0 (LTS)

• pnpm 11.3 - Adds pnpm stage for staged publishing, trustLockfile for setting controls around application of trust policies, native pkg, repo and set-script commands & more.

• npm 12.0 Prerelease, Apache ECharts 6.1 (Demos.)

📖 Articles and Videos

Chrome Previews Declarative Partial Updates - Two new sets of APIs for working with HTML out-of-order, whether in the doc itself (via <template for>) or through dynamic insertion (via setHTML/streamHTML). Experimental in Chrome 148 but polyfills exist.

Pollard and Rosenthal (Chrome)

Optimizing Our Build Times by Migrating from Webpack to Rspack - How Yelp cut build times in half with Rspack (a Rust-powered drop-in replacement for webpack) and what they learned about barrel files and re-exports.

Benson Pan (Yelp)

Unlimited Postgres for Developers and Their Agents - ghost gives your agent unlimited postgres forks. No project limits, no cleanup, 1TB storage, 100 hrs/mo free. Try for free

Ghost sponsor

Microsoft's Analysis of the Recent Mini Shai-Hulud Compromise - A detailed post-mortem of last week's 'Mini Shai-Hulud' npm security chain compromise.

Microsoft Defender Security Research Team

🤖 AI-Assisted Engineers are Burning Out: Is This Fine? - A look at the negative effects of AI-assisted coding and how to avoid burning yourself out. Ivan Chepurin

📄 A Simple Clustering Algorithm for Lists - Some algorithm fun. Cassidy Williams

🛠 Code & Tools

Deno 2.8: The 'Biggest Minor Release' to Date - The headline is that Node.js compatibility has jumped from 42% in Deno 2.7 to 76.4% now (higher than Bun). Deno also gets huge perf gains across the board and drops the npm: prefix requirement when adding/installing packages. Plus many other things, including:

• New commands including: audit fix to upgrade vulnerable dependencies, pack to build a project into a npm-publishable tarball, and why to see why a package has been installed.
• Web API support improvements, including OffscreenCanvas going stable.
• Node module.registerHooks() support.
• Chrome DevTools can now inspect Deno's network traffic.
• A built-in CPU profiler.
• import defer support.
• V8 14.9 and TypeScript 6.0.3.

Bartek Iwańczuk

10 Merged, 34 to Go: Fixing JS Observability Upstream - Every JS APM tool monkey-patches libraries. It breaks with ESM, bundlers, and non-Node runtimes. Here's how to fix it.

Sentry sponsor

📄 DOCX 9.7: Build Word .docx Files in JavaScript - A mature, comprehensive library for generating docx files both client and server side. There's a CodePen-based example with the basics, plus over 100 example scripts.

Dolan Miu

tinykeys 4.0: A Tiny, Modern Library for Keybindings - Has a very simple, straightforward API and the page includes live demos.

Jamie Kyle

An Official Node.js Codemod to Migrate from Axios to fetch - A codemod to transform code using Axios to using the Fetch API instead.

The Node.js Team

📱 Hot Updater: Self-Hosted Over-the-Air Updates for React Native - A way to deploy updates to apps without app store submissions.

Sungyu Kang

• 📊 Perspective 4.5 - Analytics and data viz component for large and streaming datasets.

• Partytown 0.14.0 - Relocate resource-intensive scripts into Web Workers.

• atproto TypeScript SDK Upgrades - Every package in the @atproto namespace has been rebuilt, and all are now shipped as ESM.

• Kysely 0.29.0 - Popular type-safe SQL query builder.

• Svader 1.0 - Create GPU-rendered Svelte components.

👀 JS Crossword Tips

The JS Crossword (featured at the top of the issue) is tough, so I have some educational tips and JS quirks to help you on your way:

• The crossword runs in the browser, so the window global object is in play. For example: find(0) and name return things in the browser, but not in Node.

• Look at the 'playground' beneath the puzzle. While a clue may say object, the expected result may be more detailed.

• A number like 67 can be represented multiple ways. For example: 0103 == 67 and 0x43 == 67

• You can go further with prefixes and suffixes on numbers. For example: 123., +123, and +123. all equal 123

• Assignments evaluate to the value that was assigned.

• Tagged template literals offer a… quirky way to call functions. Consider that this works in JS: console.log`hi` (though this is not equivalent to console.log('hi')).

• ' is not in the allowed character list.