Together with  Master.dev

Flow for TypeScript Users in 2026 — Flow is Meta's mature typed dialect of JavaScript, and over the years its syntax has converged closely with TypeScript's. This post walks through where the two now differ: Flow's stricter defaults reject several crash-prone patterns TypeScript's strict mode accepts, and it adds features of its own, like exhaustive match expressions.

George Zahariev (Meta)

🤖 Code is Cheap(er) — The creator of htmx says that while code is increasingly easy to produce, understanding is still expensive, and “complexity remains our apex predator.”

Carson Gross

IN BRIEF:

RELEASES:

  • Playwright 1.61 – You can now register and test passkeys, as well as read/write to localStorage and sessionStorage via a new WebStorage API.

  • ESLint v10.5.0 – Five core rules now highlight smaller ranges of code to avoid shadowing other problems in editors.

  • 🤖 TanStack AI Beta – Framework and provider-agnostic AI toolkit.

How TanStack Cut TypeScript Type-Checking Work by Up to 86% — TanStack Table v9 (now in beta) made its features modular, but the generic types behind that flexibility introduced noticeable editor lag in alpha. This deep-dive shows how the team used tsc diagnostics to cut type-checking work by 62–86%, with lessons for anyone authoring type-heavy libraries.

Kevin Van Cott (TanStack)

📄 How Building an HTML-First Site Doubled Our Users Overnight – Out with the React, and in with the Astro. Alistair Davidson

📄 Building a Real Blog Easily in Astro – By real, Zell means something beyond demo-level, with excerpts, post update dates, etc. Zell Liew

📄 Streaming HTML with textStream() in Chrome Canary Ollie Williams

PolyCSS: CSS 3D Engine for the DOM — Renders textured 3D polygon meshes entirely in the DOM using CSS matrix3d() transforms — no WebGL or <canvas> required. Works with vanilla JS, React, and Vue. There’s a gallery to explore and a live builder if you want to play around.

LayoutitStudio

  • Tabulator 6.5 (above) – Create interactive tables from any HTML table, JS array or JSON data.

  • 🕒 <relative-time> 5.2.0 – Web Component for formatting automatically-updating timestamps as localized strings or relative times.

  • Fable 5.2 – No, not the LLM you can't use, but an F# to JS/TS (and now Erlang too) compiler you can use. More info.

  • React Native 0.86 – Edge-to-edge support on Android 15+ and improvements to its DevTools.

  • Biome 2.5 – The fast code formatting and linting toolchain has now passed 500 lint rules.

  • get-value 4.1 – Use paths like a.b.c to get a nested value from an object.

  • axios v1.18.0 – Promise-based HTTP client for the browser and Node.

  • 📊 visx 4.0 – Airbnb's visualization primitives for React.

📸 Add robust in-browser barcode scanning to your web apps using STRICH, a lean JS library. Free 30-day trial, try the demo app today!

Flaky tests slowing down dev? Meticulous gives engineers confidence to ship faster by autonomously testing every edge case of your web app.

🤖 Generate 50,000 invoices overnight. Foxit's DocGen API merges JSON data into branded PDFs at scale, with no PDFKit and no copy-paste.

📢  Elsewhere in the ecosystem