This week Kamran and Erik try to dissect the complex landscape of JavaScript and TypeScript compilers, transpilers, interpreters, engines, and runtimes (oh my!). What are the tools, what are they used for, why is the world so complicated, and what should you care about as a TS developer?

• (04:55) - This Week in TypeScript: Node.js Corepack Issue Affects Users

• 📌 PSA: Node.js LTS corepack registry key signing issue breaks people's CI/CD pipelines and npm/pnpm installations. If you are affected, check this issue out! It’s fixed now and backported to Node 20.18.3.
• 📌 PSA: There was a remote code execution vulnerability in Vitest, and a Vite dev server vulnerability. Update to the latest patch versions!

Community Highlights

• Blog Post: TypeScript enums: use cases and alternatives (Axel Rauschmayer)
• Blog Post: Tutorial: publishing ESM-based npm packages with TypeScript  (Axel Rauschmayer)
• Blog Post: Move on to ESM-only (Anthony Fu)
• Blog Post: Fetch and HTTP/2 support in Node.js, Bun and Deno (George Haidar)
• Learning: Nx is doing cool stuff for TS monorepo setups and has a whole series on it
• Cheatsheet: Bookmark this TypeScript Cheat Sheet by Zero to Mastery (PDF version available)
• Book: Joshua Goldberg has a new Learning TypeScript book and shares a tip about TS comments

 Compilers and Runtimes Deep Dive

• The JavaScript Runtime Environment (Jamie Uttariello)
• Wikipedia: ECMAScript Engines
• V8's interpreter, Ignition
• Hermes engine for React Native
• TSC, the official Microsoft TypeScript compiler
• SWC, a Rust-based compiler for JavaScript and TypeScript
• esbuild, a Go-based compiler for JavaScript and TypeScript
• oxc, a (new) Rust-based compiler by the creators of Vite
• Deno compile for creating binary executables
• Bun runtime, a drop-in replacement for Node
• workerd runtime by Cloudflare
• Vercel Edge Runtime
• A list of WebAssembly (WASM) runtimes
• WinterTC, a committee for unifying server backend runtime APIs

Links

• TypeScript 4.0's labeled tuple elements (playground link)
• Wondering what version of Node supports what ES features and syntax? https://node.green/
• Replace those ugly TS errors in VSCode with something more pretty

Sponsored by Excalibur.js
Excalibur.js is the friendly TypeScript game engine for making 2D web games. Use your TypeScript or JavaScript skills to make games! Excalibur comes out-of-the-box with everything you need to make web games, like physics, sprites, animations, sound effects, input, and particles. Design your assets with tools like Aseprite and Tiled, then load them natively using first-party plugins.

Music
Seahorse Dreams by Kubbi (Spotify)

Creators & Guests