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Industry News

10/19/2026
The up to 8x faster Rust port of TypeScript



















#​807 — October 20, 2026

Read on the Web




JavaScript Weekly








tsrs: Cloudflare and VoidZero's Rust Port of TypeScript — A Rust port of the Go-based TypeScript 7 compiler, built with some input from the TypeScript team and heading into Oxc. Benchmarks claim up to 8x the speed of TypeScript 7.0 and it runs in WebAssembly. Experimental, but npx tsrs works.


Chen, Mitropoulos and Nakazawa (Cloudflare / VoidZero)



💡 Max Schwenk started the port with agents writing the code, and tells the full tale here, including how it took his company's typecheck from 80 seconds to 7.





Send Webhooks from Your TypeScript API in Minutes — One typed npm package, one call per event. Svix handles retries, signing, delivery logs, and a portal for your customers, so you don't build any of it. Resend sends 200M+ webhooks a year through it.


Svix sponsor






Thank You, Deno: Competition Keeps JavaScript Moving — Last week we covered Deno joining Cloudflare and the future of the Deno runtime. Deno was valuable, says Darcy, as it (and Bun) made the entire ecosystem better by pushing Node and npm to adopt its best ideas.


Darcy Clarke (vlt)




IN BRIEF:





RELEASES:




  • Node.js v26.12.0 (Current) and v24.22.0 (LTS) – 26.12 can now synchronously load most ES modules and marks the config file stable; 24.22 gains util.throttle and util.debounce.




  • Astro 7.4 – Adds a --timings flag for astro build to see where build time is spent, plus experimental parallel prerendering across worker threads.




  • React Router 8.5 – Deprecates its own view transition APIs in favor of React's <ViewTransition> component, and adds an experimental 'API-only' mode.




  • Pretext 1.0 – Multiline text layout without touching the DOM. 1.0 ports browsers' own line breakers, so results more closely match what would render.




  • React Native 0.88, Elysia 2.0 RC, ESLint 10.13, tsup 9.0, Vuetify 4.3





📖  Articles and Videos





The Tetris Script That Becomes Snake Once Prettified? — You'd think pretty-printers and deobfuscators at least leave a script's logic alone, but no. See how chaining semantic quirks in such tools can turn the 'cleaned up' output into a different program!


Robert Vähhi (TrustSig)






Do Web Components Have a Future If Nobody is Writing Them? — Nolan has spent years building and defending web components, so this thoughtful, if a little melancholy, piece carries some weight.


Nolan Lawson






Your CI Was Built for Humans. Your Agents Need Something Else — Expo is mobile AI infrastructure. Your agents build, test and ship iOS and Android apps in the background.


Expo sponsor






▶  ViteConf 2026: The Full Replay — Last week's ViteConf brought ~30 talks including Evan You's keynote on tooling in the agentic era, plus updates on Vitest 5, Vite DevTools, and a faster parser coming to Oxc. It's 10 hours, but there's a hero with timestamps in the comments.


ViteConf



💡 One of the bigger announcements: Void, the Vite team's full-stack SDK and deploy platform, is now open source.





How to Gaslight JavaScript Programmers (with Proxies) — Proxy, introduced as part of ES6 back in the day, has plenty of practical uses but can also make objects behave in curious, unexpected ways. Complete with live, editable examples.


Bryan Gillespie






How Miro Moved 70,000 Tests from Jest to Vitest — The story of moving ~70,000 tests across an 800-package monorepo to Vitest, with AI agents doing most of the laborious work.


Sergey Nikitin




📄 Upgrading to Zod 4 Cut Our Worker CPU by a Third – A Zod 3 to 4.5 migration at 100 million parses a day. Chris Arderne


📄 Using replace() as an Iterator – An old regex-callback-for-side-effects idiom, benchmarked against alternatives. Eugene Lazutkin


📄 Recursion is DEAD and HTML Killed It – Hands-on with Chromium's experimental Declarative Partial Updates proposal. Dave Rupert


📺 NightMonkey: Compiling JavaScript Ahead of Time to WebAssembly – An hour-long VMIL 2026 talk from a Wasmtime engineer. Chris Fallin



🛠 Code & Tools








Maplair: A Batteries-Included, Tree-Shakeable Fork of Leaflet — Still in alpha since last year, one of Leaflet's contributors has forked it, rolling in the 2.0 work plus rotation, fullscreen, search, heatmaps and more – all tree-shakeable.


Simon Legner



💡 The same day, Leaflet's creator posted a candid update about his experiences living in Ukraine and a plan to get Leaflet 2.0 released.





Embeddable DOCX, XLSX & PPTX Editor for Users and AI — Let your AI edit existing files via object-level APIs. Users review and keep editing the same file. Try Playground.


Thinkfree sponsor






📊 Chartist 2.0: The Lightweight SVG Charting Library Returns — A CSS-styled SVG charting library from 2014 that "went stale over the last years" makes a comeback with a composable API, server-side rendering to SVG, terminal charts, and still ~12KB gzipped for a line chart. There's a migration guide for 1.x users.


Gion Kunz et al.






Pele: Mermaid Diagrams as Lightweight, Themeable SVG — Zero-dependency renderer for the Mermaid diagram syntax with responsive layouts and SVG you can theme with CSS variables. Around a sixth the size of Mermaid.js. Try the playground.


Steph Ango (Obsidian)










<rich-input>: A Rich Input Field with GitHub-Style Search Filters — A web component for GitHub-style search boxes: free text mixed with autocompleted key:value filters, highlighted in place.


Bramus Van Damme










📰 Classifieds




🕵️ Muse doesn’t announce itself. Meta’s AI agent browses like a real user. See how Fingerprint detects it by name and try free for yourself.



🎬 Your app needs video, not a video team. Upload any format to Hyperserve's API, get back MP4 on a global CDN. Ship video in an afternoon.





📢  Elsewhere in the ecosystem















10/12/2026
Ryan Dahl: 'Why reimplement Node? It works.'



















#​806 — October 13, 2026

Read on the Web




JavaScript Weekly








Deno is Joining Cloudflare (But…) — Maybe David Bushell saw the writing on the wall, as the Deno team isn't joining Cloudflare to keep working on Deno, but to fold celld into workerd so Durable Objects can be self-hosted (more on that here). The Deno runtime will get a final year of official fixes, Deno Deploy closes in six months, and JSR moves to Cloudflare's infrastructure.


Ryan Dahl



💡 On Hacker News, Ryan Dahl noted that Deno "has been sucked into the gravity well of Node compatibility" before asking: "Why reimplement Node? It works." But what happens to the JavaScript™ trademark case, I wonder…?





CodeAF: #1 of Ten Coding Harnesses on DeepSWE — Ten coding harnesses ran the same open model on 113 real GitHub issues. CodeAF solved the most and paid the least per solved issue: 3.4x less than Claude Code, 4.8x less than OpenCode. A new open-source coding harness built for open models.


AgentField AI sponsor






Bun 1.4.3 Adds bun check, a Built-In TypeScript Type Checker — bun check is a port of TypeScript 7's checker that reads your tsconfig.json, reports the same errors as tsc and, Jarred claims, runs 3-6x faster. It plugs into bun run/test/build too. Idle server processes now use far less CPU, and a JavaScriptCore upgrade picks up numerous perf gains.


Jarred Sumner




IN BRIEF:





RELEASES:




  • Last second addition: TanStack Start 1.0 has just dropped. Big news for full-stack React and Solid fans! :-)




  • 🎉 Partytown 1.0 – A popular way to relocate third-party scripts to run in a Web Worker rather than on the main thread has left beta after five years in development.




  • Marionette 5.0 – Six years on, the Backbone-era framework returns with a core free of Backbone, jQuery and Underscore… and they explain why!




  • Bootstrap 6 Alpha – An early look at Bootstrap's first major release since 2021, leaning on modern CSS and making its JavaScript plugins ESM-only.




  • Express 5.3.0 – A maintenance release worth upgrading to, as patched qs, proxy-addr and body-parser dependencies close five CVEs.





📖  Articles and Videos








📊 WebSocket Servers in JavaScript: Node.js, Bun, and Deno — In 2023, Daniel found Bun much faster than Node at relaying WebSocket messages, but there was a bug in his Bun server. This new attempt uses a C client/relay as a baseline, and Node 26 now gets close to C latency, ahead of Bun and Deno.


Daniel Lemire






How Sindre Sorhus' Personal Site is Now Made in Swift — One of JavaScript's most prolific developers explains how he's dropped Astro and now builds his personal site with Swift, including the styling and markup, with broken links and style typos failing at compile time (source).


Sindre Sorhus






Too Many Agent Traces to Read? Find the Ones That Matter, Live Oct 14 — Bad answers, wrong tool calls, too many traces. See how Sentry engineers find the failures worth fixing. Register now.


Sentry sponsor






Tiny Apps with TinyJS — A quick look at a new way to make tiny JS-powered desktop apps we featured a few weeks ago.


Raymond Camden




📄 Yet Another Way to Invoke Functions Without Parentheses – There are many ways to invoke arbitrary functions in JavaScript without using parens, but this is a particularly obscure one! bartosz


📄 Six Months of Building with Remix 3 – What the post-React Remix (v3 was released earlier this month) is like to work with day to day. Sergio Xalambrí


📄 A Visual Notation for React's Parent and Owner Trees – With a playground that draws them from your code. Jules Blom


📄 How to Test an iframe's postMessage Handler Keshav Malik



🛠 Code & Tools








🤖 OpenCode 2.0: A Big Update for the Open Coding Agent — A full-featured agentic coding app, built on Bun, that's more akin to Claude Code than Pi, say. v2.0 overhauls it with background subagents, a 'code mode' to let models script MCP tool calls, and clients for vanilla JS and Effect code to drive it.


Anomaly / The OpenCode Team



💡 If you've not given OpenCode a try yet, you can get started here.





Tamagui 3: One React UI Codebase for Web and Native — A styling system and component kit for sharing UI between React web apps and React Native, with a compiler that keeps things fast on both. v3 adds Tailwind-style props and React Strict DOM support.


Nate Wienert






Mobile AI Infrastructure for Web Devs Who Code with Agents — Point the agent you use for the web at iOS and Android. Expo takes care of the native builds and the trip to the stores.


Expo sponsor






H3 v2: The UnJS HTTP Framework Rebuilt on Web Standards — The minimal HTTP framework behind Nitro and Nuxt's server layer is now stable in v2, a rewrite around standard Request and Response so the same app runs on Node, Bun, Deno, Workers, and even in the browser. Migration guide.


Pooya Parsa






Shaders: 190+ WebGPU Effect Components, Now Open Source — Ripples, glows, and dissolves into ASCII, composed as components rather than written as shader code, for React, Vue, Svelte, Solid, or plain JS. The engine, framework bindings, and the components themselves are now all MIT licensed.


Simon Le Marchant



💡 If you like this vibe, ascii.rest, which offers "236 animated ASCII pieces for web pages", is also worth a look.





  • Node.js v26.11.0 (Current) – Adds a --process-timeout flag to end a process after a set time, plus virtual table support in node:sqlite.




  • Hono 5.0 RC – The web-standards server framework goes ESM-only and moves its runtime adapters into separate packages.




  • 🔒 Handlebars 4.7.10 – The templating library fixes two critical JavaScript injection flaws affecting releases back to 3.0.




  • he 2.0 – Robust HTML entity encoder/decoder. First release in eight years, now ESM with named exports.




  • React Aria 1.22 – Adds a new Sheet component.




  • pnpm 12.12









📰 Classifieds




⚡️Add lightning-fast 1D/2D barcode scanning to your web app with STRICH. On-device processing, free trial and demo!



Durable AI agents built with the AI SDK you already use. Long-lived LLM sessions that survive deploys, crashes & refreshes. Test out chat.agent on Trigger.dev.



🎬 Your app needs video, not a video team. Upload any format to Hyperserve's API, get back MP4 on a global CDN. Ship video in an afternoon.





📢  Elsewhere in the ecosystem





  • In Fingerprints are the New Cookies, Roy Fish demonstrates the various ways web pages can assign a unique(ish) identity to you using JavaScript.




  • 🤖 Theo Browne set AI agents loose on porting the TypeScript 7 compiler to Rust, and ts-rust is the (very experimental) result.




  • 📱 Following Shopify, Coinbase is moving its app off React Native, saying agents have made building each feature twice cheap enough to go fully native.




  • Fancy a retro robot voice in your web experience? Klattsch is a voice synthesizer you can use on the web or from Node.js as an npm package. Daiiisy, daiiisy…




  • Three years ago we mentioned Linus Groh's Zig-based Kiesel JavaScript engine. It passed 25% of test262 back then, but v0.4.0 has landed and it's now at 94.7% (not far behind V8) and supports modern language proposals like await dictionary and numerous iterator proposals.












10/05/2026
Why don't more developers 'use the platform'?



















#​805 — October 6, 2026

Read on the Web




JavaScript Weekly








Why Don't More Developers 'Use the Platform'? — A thoughtful look at why we often rebuild what browsers already offer, from someone usually on the platform's side. It kicked off an extensive Hacker News discussion, with many arguing native controls and APIs are too limited or awkward to depend on.


Nolan Lawson






Free Course: Build Ambitious Modern Interfaces Faster with OpenAI Codex — Join Katia Gil Guzman for this free Codex course and learn how agentic coding has changed frontend development. You'll cover setup, prompting, feedback, skills, automations, deployment and more.


Master.dev sponsor






Preact 11 Released — Six years after the road to Preact 11 began, the latest version of the popular "alternative to React with the same modern API" is here, with improved hydration, automatic ref forwarding, and an ESM-only package. The upgrade guide covers the changes.


The Preact Team






Nuxt 4.6: A Big Step Towards a Server-Agnostic Nuxt — A meaty release for the full-stack Vue framework with a server layer that no longer ties you to Nitro (pure Vite server builds are now an experimental option), built-in sessions, Vue Vapor support, and a new CLI (Nuxt CLI 4.0).


Daniel Roe




IN BRIEF:





RELEASES:




  • Remix 3.0 – No official post yet, but the new stable release of the rebuilt full-stack framework, with no React required. The RC release post has more info, though.




  • Ink 8.0 – The popular TUI renderer now requires React 19.3 and adds scroll offsets for building scrollable views, now common in coding agent UIs.




  • Inferno 10 – React-like UI library built for raw rendering speed. Now shifts more work from runtime to its JSX compiler.




  • Qwik 2.0 RC, pnpm 12.10, Ember 7.3, Video.js 10, ESLint 10.12





📖  Articles and Videos








Getting Started with Claude Code Mods — Claude Code has just added support for Mods, a way to extend the agentic coding harness with JavaScript so you can watch events, change behavior, and draw custom UI. Addy builds a mod here in ~80 lines that shows a live 'forecast' of your context window.


Addy Osmani






Friendship Ended with Deno, Now Node is My Best Friend — David felt good about Deno in 2021, but has now returned to Node and is surprised by how much has improved. He ported his site generator back with barely any changes, and doesn't hold back on where he thinks Deno went wrong.


David Bushell






100+ Search Engines. One Simple API — Build with real-time data from Google, YouTube, Amazon, and more. SerpApi delivers structured JSON and Markdown for AI agents and your apps. Skip scraping headaches.


SerpApi sponsor






I Tested 11 HTTP Resilience Libraries — How do fetch wrappers like Ky, ofetch, and Wretch behave if you abort mid-retry? The author of ffetch tested eleven options and found five still attempt retries after cancellation.


Gabor Koos




📄 How Booking.com Cut Its Node.js Service's Costs by 38% – By moving from PM2 to Watt's worker threads and reworking load balancing and worker configuration. Ilya Malyavin


📄 Readable Regular Expressions for TypeScript, Inspired by Emacs – Rebuilding the SemVer regex from named, composable pieces. Rahul M. Juliato


📄 On Automatic Type Refinements – Which filter callbacks let TypeScript narrow an array's type, and which don't. Radosław Miernik



🛠 Code & Tools








TanStack Charts 1.0: A Composable, Typed Charting Library — A framework-neutral way to declaratively specify visualizations in typed, tree-shakable JavaScript which are then rendered with SVG or Canvas. The extensive sample catalog (with code) shows off line, bar, pie and area charts, plus heatmaps, box plots, histograms, etc.


Tanner Linsley






SvelteKit 3: 'The Same Framework with a Little More Polish' — Svelte's official app framework gets a cleanup/polish release. Few new features, and remote functions remain experimental, but existing users have some work to do to migrate (though sv migrate can handle much of it).


The Svelte Team






Publish to Miris Straight from Adobe Substance 3D Painter — Stop sharing decimated 3D content. Stream your high-fidelity Adobe Substance 3D Painter assets via the Miris plugin.


Miris sponsor






Effect 4.0: A Smaller Core, Rebuilt Runtime — A ground-up rewrite of the popular library for building reliable apps that handles tricky stuff like resource management, concurrency, retries, typed errors, and more. v4.0 boasts 5x smaller minimal bundles and 86% less memory used per concurrent task.


Sebastian Lorenz






Lightpanda 1.0: A Headless Browser for Automation — A headless browser built from scratch in Zig. With no graphical rendering, it uses a fraction of Chrome's CPU and memory (~35MB memory in a run I just did!). Drive it with Puppeteer/Playwright or, the fun bit, script it with plain JavaScript.


Francis Bouvier






  • eslint-cssicorn 0.1 – Sindre Sorhus has moved the CSS-only rules from his mammoth eslint-plugin-unicorn ESLint ruleset into a new CSS-focused package.




  • pixelmatch 8.0 – Tiny, fast pixel-level image comparison library. Switches to a more perceptually accurate color metric, so diff counts will change.




  • PR Comment Inbox – Nicholas Zakas's email-style inbox for GitHub review comments, with threads and read/unread state.




  • Electron Forge 8 – Toolkit for building, packaging, and publishing Electron apps.




  • Redux Toolkit 2.13 – The official Redux toolset adds TypeScript 7 support.









📰 Classifieds




Bring your wild ideas to Mozilla Festival. Gather and connect with other developers and creatives in Barcelona, Oct. 28-30. Get your badge.



Trigger.dev runs your TypeScript agents and workflows in production, with queues, retries, and no timeouts on long-running tasks.





📢  Elsewhere in the ecosystem















09/28/2026
A-ha's Take on Me, recreated in pure JavaScript



















#​804 — September 29, 2026

Read on the Web





JavaScript Weekly








How Anthropic Made Claude's Apps 3x Faster in Two Weeks — A grab bag of performance lessons from a sprint that cut p75 'time-to-typeable' from 3.1s to 0.55s. Em dashes (the irony!) pushed V8 onto a slower regex path, a stray location.reload() caused half a million hidden reloads a day, and more.


Wang, Attard, and G (Anthropic)






Still Writing Tests? Meticulous Is Here — Notion, Dropbox and Wiz are now using a testing paradigm they can’t ship without. Built by former Palantir engineers, Meticulous creates an evolving suite of deterministic E2E UI tests, delivering exhaustive coverage with zero developer effort.


Meticulous AI sponsor






Vite+ 1.0: One CLI for Your Entire JavaScript Toolchain — The single vp command can now manage your Node runtime (if you wish), package manager, dev server, linting, formatting, testing, builds and task running, configured from vite.config.ts. vp migrate can be used to bring existing Vite, Vitest, ESLint, tsup, and similar setups into Vite+.


VoidZero



💡 Evan You also looks back at four months of VoidZero at Cloudflare, including work on the Oxc React Compiler, Vitest 5, stable type-aware linting, and more.



IN BRIEF:





RELEASES:




  • MSW (Mock Service Worker) 3.0 – The popular API mocking library is now ESM-only, adds a Vite plugin, supports GraphQL subscriptions, and can intercept page navigations and form submissions.




  • Vinext 1.0 – Cloudflare's Vite-based Next.js reimplementation now supports the Pages and App Routers, and offers a migration path for existing apps.




  • Mermaid 12.0 – The diagramming tool now defaults to the ELK layout engine for flowchart, class, state and similar diagrams, so existing ones will look different unless you set layout: dagre. Also adds UML use case diagrams.




  • pnpm 12.8, Angular 22.2, TinyBase 10, QUnit 3.0





📖  Articles and Videos








The Grand Unifying Architecture of Frontend — SolidJS's creator argues that HTMX, React, LiveView, and friends differ mostly in how they split the same three jobs (navigation, content, and instant UI feedback) between client and server. He then shows how Solid 2.0 aims to cover the whole spectrum.


Ryan Carniato






Build Products That Help People Build Their Lives — Fidelity technologists can change the way our clients invest - for the better and for everyone.


Fidelity Careers sponsor






Optimizing Objects with null Prototypes — In V8, objects created with { __proto__: null } or Object.create(null) start in a slower 'dictionary mode'. Matteo shows how creating a plain object and then setting its prototype to null preserves fast properties.


Matteo Collina



💡 If you fancy going deeper, Fast properties in V8 is the V8 team's 2017 explainer of how objects switch between fast and 'dictionary' mode.





Node.js Built-ins That Replace npm Packages — A tour of 12 Node built-ins that replace common ecosystem packages along with their stability levels and some gotchas that might keep you using the established alternatives.


Flavio Copes




📄 JavaScript's Greatest Pun? ${{ }} – Looks like Mustache, but ${{ name }} passes an object using shorthand properties to a tag function, preserving both the variable's name and value. Nishant Shukla


📄 How GitHub Improved Performance by Moving Off CSS-in-JS Josh Black and Marie Lucca (GitHub)



🛠 Code & Tools









Size Limit: A JavaScript Performance Budgeting Tool — Set a size or load-time budget for your code and this tool can fail CI (or flag a PR) if a change goes over it. You can also do one-off checks and see visualizations of where the bytes are. Framework-agnostic and doesn’t care which bundler or CI you use.


Andrey Sitnik






Your UI Gets Blamed for a Slow Query — TimescaleDB extends Postgres so the query behind your UI returns fast as data grows. Get $1000 credit to start.


Tiger Data (creators of TimescaleDB) sponsor






EmDash 1.0: Cloudflare's WordPress 'Successor' is Now Stable — An Astro-based alternative to WordPress, now with a decentralized AT Protocol-based plugin registry and plugins that run in sandboxes. It’s not Cloudflare-only, either, as it also runs on Node.js.


Buscemi, Kane, and Pham (Cloudflare)






📝 DOCX 9.8: Generate Word .docx Files from JavaScript — A comprehensive library for generating docx files. It’s only a few months since we linked to it, but this is a big release with support for charts, shapes and watermarks, plus more math notation support. (Homepage.)


Dolan Miu






  • 🔊 wavesurfer 8.0 – Popular audio waveform renderer and player. Refactored for better efficiency, with numerous bug fixes.




  • pretty-bytes 7.2 – Convert byte quantities into human readable strings.




  • ✉️ postal-mime 4.0 – An email parsing library that works everywhere.




  • Typia 15.0 – Turn pure TypeScript types into runtime validators.









📰 Classifieds




The future of mobile development is agentic. For years, mobile shipped slower than the web. Now, agents are coding/testing/shipping all on Expo.



🤖 Blocking all bots breaks AI agents. Blocking none invites fraud. Fingerprint tells verified agents from bad actors.



SurveyJS: Build complex forms faster with a drag-and-drop builder for any JavaScript app. Self-hosted and backend-agnostic.





📢  Elsewhere in the ecosystem