Useful Patterns for Building HTML Tools — In many situations, you don’t need a full-on framework to build useful tools; just HTML, JavaScript and CSS in a single file will do the job fine. Simon’s become a bit of an expert by rolling out many such tools using LLMs, and shares his process and practices here. More please!

Simon Willison

Why Are the Top AI Companies Choosing SpreadJS? — Because SpreadJS brings a familiar Excel-like UI to JavaScript web apps. Trusted by leading AI innovators and organizations, it empowers devs to build finance, analytics, and more apps with Excel I/O, 500+ calc functions, charts, & more. View demos!

SpreadJS From MESCIUS sponsor

Deno 2.6 Released — The popular alternative runtime introduces a new npx-like tool called dx to run binaries from npm and JSR packages, adds a deno audit tool for identifying vulnerabilities in dependencies, adds more granular control over runtime permissions, implements source phase imports, and more.

Iwańczuk and Jiang (Deno)

How the Seattle Times is Protecting Itself from npm Supply Chain Attacks — Technical details on how the Seattle Times has been adopting pnpm as an alternative to npm for its enhanced client-side security controls.

Ryan Sobol

A Proposal for Making Complex Web Apps Faster — From Microsoft comes an early-stage look at a proposal for a new Delayed Message Timing API to help deal with the slowdowns that multiple parallel contexts (iframes, threads, multiple windows, etc) can introduce. Feedback is being sought.

Joone Hur & Patrick Brosset (Microsoft)

Behind CERN’s Data Engine: Faster Writes, Instant Insights — CERN’s massive time-series workloads run faster with TimescaleDB, improving ingestion, compression, and real-time analytics.

Tiger Data sponsor

Building a Tiny 2D Physics Engine in JavaScript — A lovely, and rather old-school style post about building a simple physics engine from scratch in JavaScript then golfing it down to just 2KB of source as seen on its homepage (where there's a demo too).

Maxime Euzière

Open Sourcing the Remix Store — The Remix Store is a swag store for the Remix project and its codebase provides a powerful example of how Remix’s own core team builds apps with Remix and Hydrogen.

Brooks Lybrand and the Remix Team

🕒 <relative-time> 5.0: Format Timestamps as a Natural Language Relative Time — Supply this web component with a standard formatted date and time and it’ll render “2 days ago”, say. GitHub uses this itself on all repo and code views.

GitHub

Still Writing Tests Manually? — See why modern engineering teams like Dropbox, Notion and Lattice rely on Meticulous to run E2E UI tests.

Meticulous AI sponsor

ts-exec: Execute TypeScript on Node using SWC — From the creator of Adonis comes another way to run TypeScript on Node. While Node 22.18+ supports type stripping, ts-exec supports JSX and decorators and has some benefits over ts-node and tsx.

Harminder Virk

Toastflow: A Toast Notifications Library for Vue 3 — A really nifty web-based playground for playing around with toast notifications. I wish more projects had things like this. Toastflow is technically framework agnostic, but the only renderer so far is for Vue 3. GitHub repo.

Adrián Janočko

Devalue: Get the Job Done When JSON.stringify Can't — A library from the Svelte project that’s like JSON.stringify but that can tackle more things like cyclical and repeated references, regexes, Map and Set, and even custom types. You can try it out here.

Svelte

iceberg-js: A JavaScript Client for Apache Iceberg — A minimal, vendor-agnostic JavaScript client for the Apache Iceberg REST Catalog API that works in most runtimes and environments.

Katerina Skroumpelou (Supabase)