Axel Rauschmayer (also on 🦣)

My books on #JavaScript and #TypeScript are free to read online: – Exploring JavaScript (ES2025 edition) – Deep JavaScript – Exploring TypeScript (TS 5.8 edition) – Shell scripting with Node.js 🦋 Reposts appreciated! exploringjs.com

I've put together a web component for embedding npm package information on your site. Ready for use on your blog or in your documentation. However, it's better than that because it does it the cool, funky, rad, fantastic @npmx.dev way. tangled.org/vale.rocks/n... #npm #npmx

If anyone needs a silly, not portable, zero dependency, one liner TypeScript build script that can only handle a single file. Look no further!

The three parts Void consists of: ◆ The SDK: Zero-config SDK to build full-stack Vite apps ◆ The Platform: A shared deployment platform for teams to host Void apps on Cloudflare ◆ The CLI: Provision resources and deploy Vite apps to Cloudflare or Void. blog.cloudflare.com/deploy-with-...

This is huge! Void is out and fully open source. The SDK, CLI and the platform. Big props to @christoph.nkzw.tech and @broooooklyn.bsky.social for shipping this and thanks to every alpha user helping us testing!

MacOS: IINA is a great video player that mostly works like Apple’s QuickTime Player but lets you “dock” (*) playback controls so that they never obscure the video (and are never hidden). (*) Instructions (currently not obvious): github.com/iina/iina/is...

When it comes to scientific computing and fintech: What features is #JavaScript missing that other languages have?

Finally Firefox lets redeclare variables in the console, it was one of my biggest pain points when debugging with it. Thanks @lochipi.bsky.social for implementing this!

Decentralized mesh networking (for messaging without internet or cell network): Meshtastic vs. MeshCore www.austinmesh.org/about/meshco...

🚀 I made a smol ~2kb syntax highlighter that uses the CSS `::highlight()` API. davatron5000.github.io/microlighter/

#Firefox: Vertical tabs plus tab groups are really nice: The user interface is intuitive and I don’t need an extension anymore (Tree Style Tab etc.).

Reddit is killing RSS feeds and ending public API access because of AI bots techcrunch.com/2026/09/30/r...

“The death of web development education – Rescuing a field from disappearing” by @molily.de molily.de/web-dev-educ...

Preact 11 is out 🎉 We’ve been hard at work at making our diffing use modern features like moveBefore , leveraging ESM for tree-shaking Preact Compat and ensuring you have a great experience with resumed hydration.

“Interview: Firefox’s chief on why he hopes a redesign will help win users from Chrome” arstechnica.com/gadgets/2026...

Node.js 26.10 comes with built-in debounce and throttle utilities. Like it! Can't tell you how many times I implemented (copied from the previous project) these two. Debounce: nodejs.org/docs/latest/... Throttle: nodejs.org/docs/latest/... #nodejs

MacOS 27 shows a handle for resizing when the screen is split between two windows. Dragging it resizes both windows at the same time.

Open source maintainers are starting to get all manner of communiques from the compliance & legal departments of huge corporations using vaguely threatening and legal-sounding language and demanding the maintainer fill out forms and reports and attest to the security of their project "because CRA".

CSS keeps getting better and better, but the problem with hearing about amazing new features is that we're stuck not being able to use them for a few years because of browser support. So, this week I looked at a bunch of well-supported CSS features that I still see people turn to JS for.

Useful: unicodelookup.com Lets you search for all kinds of things and returns Unicode characters plus additional information (such as the corresponding HTML entities).

Typography: Unicode: multiplication sign, × • Before: 640 x 480 • After: 640 × 480 Unicode: minus sign, − • Before: 10 - 2 • After: 10 − 2

If you maintain a @nodejs.org application that hasn't been updated for a couple of years, consider looking into replacing some userland dependencies with built-ins that are now available flaviocopes.com/node-builtins/

Wrote something about formatters. A biased vision of how formatters should be implemented in 2026 ematipico.xyz/blog/the-bes...

I recently learned there are way more monospace fonts out there than I was aware of somehow this led to making a video that tours 18 different fonts in 3 mins, set to chill lofi music (🔈) hope it's useful for folks - it was for me! www.youtube.com/watch?v=XukW...

In a time when most companies are so openly playing against their employees and the rest of us, we should celebrate the existence of beacons like Igalia that shows them it's their choice. Organizations can definitely thrive with fairer structures and be a strong positive force for the world.

iPadOS 27: In Mail app, I swipe right from the left bezel in order to show the sidebar. When doing that, I regularly accidentally mark a message as unread. This can be fixed by switching off right-swiping for messages: Settings > Mail > Message List > Swipe Options

📜 introducing ossrules.md - learn how leading OSS projects use agent rule files - discover skill files that projects actually use - level up your own projects and workflows I've personally learned a lot just exploring

Zed tip (macOS): shortcuts for navigating between editor panes. github.com/zed-industri... In VS Code, Command-Option-Left/Right Arrow works across panes. But not in Zed. I’m wondering if Zed should copy that behavior.

MacOS Golden Gate bug: Normally, you can press Ctrl-<digit> to go to space <digit>. Currently, that only works for space 1.

CSS experiment: Laying out a list with SVG bullet points via a CSS subgrid. codepen.io/editor/rausc...

💡 JSPI = JavaScript Promise Integration for WebAssembly "Await for Wasm code" Now in all browsers 🎉 Recently added to Safari and Firefox Looks like an important primitive for native languages C/C++/Rust, etc compiling to Wasm

11 years ago, Node.js and io.js merged back into one project

👀 These JS features -> now Baseline Widely Available: - Object.groupBy() / Map.groupBy() - Promise.withResolvers() - Element.checkVisibility() - ArrayBuffer.transfer() Available in all browsers since March 2024

Full post 👇 zod.dev/blog/zod-4-6

Another new programming language: Mojo – by Chris Lattner (LLVM, Clang, Swift, etc.) et al. mjtsai.com/blog/2026/08...

Focusing on something specific (=targeting WebAssembly) is a good idea for making a programming language useful.

I wrote about what I've been up to with my new programming language! Zena targets WebAssembly GC, with a TypeScript-like syntax, sound type system, and lots of cool features like pattern matching, async cancellation, borrow checking, WASI integration, and more! justinfagnani.com/2026/09/09/z...

It probably went unnoticed, but there are a couple of fixes that made the formatter up to 2x faster. In particular for big files with no comments.

“Package Manager Trends” by @andrewnez.bsky.social “The short version: the same defensive features keep shipping in tool after tool, and the same three bug classes keep getting fixed.” nesbitt.io/2026/09/10/p...

I was ahead of the time. blog.stephaniestimac.com/posts/2023/0...

1/ Visual Studio Code has several useful diff commands (you can list them by typing “diff” in the command palette). 1. File: Compare Active File with Clipboard 2. File: Compare Active File with Saved 3. File: Compare Active File With... 4. File: Compare New Untitled Text Files

Bookmarklet: Open a new tab next to the current one (vs. at the very end of all tabs). javascript:window.open('about:blank') I’ve added it as a bookmark named “T” at the beginning of my bookmark bar.

Preact 11 will be tree-shakeable, you pay what you use of preact/compat. Soon you won't pay for createElement when using the jsx method. We're continuously trying to give the smallest bundle size, and 600 bytes saved might not seem like a lot but... to us it is

Bookmarklet: Open a new tab next to the current one (vs. at the very end of all tabs). javascript:window.open('about:blank') I’ve added it as a bookmark named “T” at the beginning of my bookmark bar.

Vitest 5 is here! 🎉 - Big performance improvements (vm pools up to 53% faster, ~18% boost across the board including Browser Mode) - New builtin Trace View in Browser Mode - Nested projects support - New benchmarking API - New `vi.when` API - Better defaults - And a lot of bug fixes!