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JavaScript Weekly

Functional programming jargon, mapped out When 8 chunks weigh more than 355 How to fit Minesweeper into 247 bytes Bun 1.4 is (finally) fresh out of the oven Shipping less JavaScript with Baseline Reimplementing htmx from scratch Anders Hejlsberg demos TypeScript 7's 10x speedup The coding challenge you don't want to pass npm 12, TypeScript 7, and Bun in Rust What's new in ECMAScript 2026 (and usable today) Will npm v12 reject your .npmrc? Babel 8.0, Vite 8.1, and TypeScript 7.0 RC JavaScript Weekly Issue 790: June 16, 2026 JavaScript Weekly Issue 789: June 9, 2026 JavaScript Weekly Issue 788: June 2, 2026 JavaScript Weekly Issue 787: May 26, 2026 JavaScript Weekly Issue 786: May 19, 2026 JavaScript Weekly Issue 785: May 12, 2026 JavaScript Weekly Issue 784: May 5, 2026 JavaScript Weekly Issue 783: April 28, 2026 JavaScript Weekly Issue 781: April 14, 2026 JavaScript Weekly Issue 780: April 7, 2026 JavaScript Weekly Issue 779: March 31, 2026 JavaScript Weekly Issue 778: March 24, 2026 JavaScript Weekly Issue 777: March 17, 2026
JavaScript Weekly Issue 782: April 21, 2026
2026-04-21 · via JavaScript Weekly
Together with  Meticulous

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

💡 Vercel users should follow these steps, but even if you're not one, the weak link was an OAuth grant to a third-party tool, and that pattern is nearly universal.

IN BRIEF:

RELEASES:

  • Node.js 24.15.0 (LTS)require(esm) and the module compile cache are marked as stable, and --max-heap-size has been added.

  • Fable 5.0 – A mature F# transpiler that targets JavaScript (plus other languages). v5.0 adds .NET 10 and F# 10 support.

  • uuid 14.0 – Create RFC9562-compliant UUIDs (v1 through v7).

📖  Articles and Videos

How I Resolved 15K Circular Dependencies — A senior Microsoft engineer’s retrospective of clearing ~15,000 project-level circular dependencies from a 7 million line(!) TypeScript monorepo, with reusable ideas for anyone wrangling a large TS workspace.

Stefan Haas

The Vertical Codebase — Structuring an app with folders like components/, hooks/, and utils/ feels tidy at first, but gets harder to live with over time. Dominik makes the case for a vertical, domain-first approach.

Dominik Dorfmeister

🔒 The OWASP NPM Security Best Practices Cheat Sheet — A useful, long-standing checklist that continues to be updated with recent updates tackling disabling lifecycle scripts, typosquatting, trusted publishing, and dependency confusion.

OWASP Cheat Sheet Series

🛠 Code & Tools

Bun v1.3.13: Smarter Testing, Streaming Installs, and Less Memory — The Bun runtime has had a great run of releases, including last week’s v1.3.12 with built-in browser automation. Now, bun test gets numerous enhancements with --isolate, --parallel, --shard and --changed options for test env isolation, parallelization, and to run only test files affected by recent changes. The runtime now uses 5% less memory, bun install gets faster, and more.

Jarred Sumner

  • TypeGPU 0.11 – TypeScript WebGPU toolkit with advanced type inference and the ability to write shaders in TypeScript.

  • 📺 Shaka Player 5.1 – JavaScript library for adaptive media playback supporting DASH and HLS. (Demos.)

  • TiddlyWiki 5.4 – Self-contained JavaScript wiki for personal use. (Repo.)

  • ✂️ Knip 6.6 – Popular tool for finding and removing unused files, dependencies and exports.

  • wasm-xlsxwriter 0.13 – Generate Excel files in the browser or Node.

  • React Three Fiber 9.6 – The React renderer for Three.js.

  • np 11.2 – A better npm publish.

📢  Elsewhere in the ecosystem

  • Git 2.54 has been released with a couple of headline features:

    • git history offers a new, easy way to edit commit messages or interactively split a commit into two.

    • You can now define hooks in config files (whether in a repo, at user level, or even system level) rather than just in .git/hooks. You can also run multiple hooks for the same event in this way.

  • If you ever work with Ruby on Rails, you might find rails_vite interesting. It's a new tool that seamlessly brings the power of Vite into Rails' pipeline.

  • 💥 Anyone who's analyzed GitHub projects for a while knows this already, but there's a huge 'fake star' economy where people pay to make their projects look more popular than they are.

  • Isa Yeter explains how he migrated from DigitalOcean to Hetzner slashing his hosting bill by 84% in the process.

  • Cloudflare has released a preview of its new cf CLI tool for working with its various services.