TypeScript.fm - The Friendly Show for TypeScript Developers

This week Erik and Kamran make poor dad jokes, talk about Deno, and tour its ecosystem. If you're new to Deno, this will be a great introduction!

• (00:00) - We Don't Talk About Deno-no-no-no | Ep 3
• (06:54) - This Week in TypeScript: Bun 1.2 Released
• (10:54) - This Week in TypeScript: 5.8's ErasableSyntaxOnly Flag
• (14:57) - This Week in TypeScript: Tailwind 4 Released
• (16:26) - This Week in TypeScript: Vitest 3 Released
• (17:17) - Errors and Corrections
• (18:46) - Deep Dive Into Deno
• (22:19) - Deno's Integrated CLI
• (23:50) - Deno CLI: deno run
• (24:28) - Deno CLI: deno add, install, remove, uninstall
• (25:01) - Deno CLI: deno task
• (26:19) - Deno CLI: deno test
• (27:18) - Deno CLI: deno fmt, deno lint, and deno check
• (28:15) - Deno CLI: deno serve
• (29:26) - Deno CLI: deno doc
• (30:07) - Deno CLI: deno bench
• (31:24) - Deno's Standard Library
• (33:21) - Deno CLI: deno compile
• (36:24) - Deno's Performance
• (37:32) - What is Deno Fresh?
• (38:17) - What is JSR?
• (39:43) - What is Deno Deploy?
• (40:38) - Moving from Node to Deno as a Developer
• (45:48) - Deno CLI: deno upgrade
• (47:13) - What Are We Excited About In the Future With Deno
• (48:13) - Secrets of the Handbook: TSConfig's extendedDiagnostic
• (50:12) - Cool Stuff: Serve a Folder in a Single Deno Command
• (50:44) - Cool Stuff: Flappy Bird Clone in Deno Compile

• Bun 1.2 released
• Matt Pocock's take on erasableSyntaxOnly
  • TC39 Types as Comments proposal
• Tailwind 4 released
• Vitest 3 released

Deno Deep Dive

• Deno’s 2024 in review blog post
• Rusty v8 -- Rust bindings for V8
• Deno CLI docs
• Performance
  • Deno benchmark stats
  • Denosaurs benchmarks
  • AWS Lambda cold-starts
• Deno Fresh
• JSR
• Deno Deploy
• Kamran's Advent of Code 2024 repo using Deno

Links

• Learn Vim’s keyboard shortcuts with Vim Adventures
• Minnesota's Art Shanty Projects during the winter
• Secrets of the Handbook: TSConfig – extendedDiagnostics
• Alias to serve a folder using a single Deno command like npx serve (h/t Kamran)
• Deno Compile video with Flappy Bird

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

• Kamran Ayub - Host
• Erik Onarheim - Host

In this episode, Kamran and Erik discuss the newly released TypeScript support with Node 23.6 and its implications. What's supported? What's not supported? And how does it differ from Bun or Deno?

• (00:00) - Ep 2 - Node 23 Gets TypeScript Support
• (00:05) - Introduction
• (04:04) - TypeScript News and Announcements
• (10:27) - A Closer Look at Type Stripping for Node 23
• (22:56) - Differences Between Node 23 and Deno 2
• (30:22) - Cool TypeScript Stuff

• Everything You Need to Know About Node.js Type Stripping by Marco Ippolito
  • Node 23.6.0 Release Notes -- The one with TypeScript support
  • Docs: Node 23 “Modules: TypeScript”
  • Node's new built-in support for TypeScript by Dr. Axel Rauschmayer
• Native Typescript support coming to Eleventy by Zach Leatherman (PR)
• ESLint 9.18 – Zero-config TypeScript support by Andrey Sitnik
• TypeScript 5.8: Erasable Syntax Only
• PSA: Create React App doesn’t work with React 19, use Vite!

Errata

• 19:11 -- We incorrectly assumed that TSC is used for the transpilation in Node 23, but that's not true. SWC still handles the transpilation (if the flag is used) so Node's TypeScript support does not rely on TSC at all. Reported by: Marco Ippolito

Cool Stuff

• Jiti: A Node.js package for ESM and TypeScript support
• Example of `satisfies never` with switch statements by Cecile Muller, Bluesky
  • What is the “satisfies” type constraint? By Matt Pocock
• Dockview – npm package for a TypeScript native window manager
• Using “as const” for config typing by Matt Pocock

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

• Kamran Ayub - Host
• Erik Onarheim - Host

In the inaugural episode of TypeScript.fm, the two fools introduce themselves, share their "origin stories," and share plans for the podcast. Briefly covered in the news: Vite 6, Deno 2's expansion of the ecosystem, Node 23's new TypeScript support, and the latest Excalibur.js 0.30.0 release.

• (00:00) - Ep 1 - Two TypeScript Fools, One Podcast
• (00:12) - Introduction
• (21:31) - News Segment
• (29:38) - TypeScript Tricks Segment

• Vite 6 is out! Check out the new Environments API.
• Deno 2.1 was released in November -- Node.js compatibility, npm packages, WebAssembly
• Node 23 support for TypeScript (via Matt Pocock)
• Excalibur.js v0.30.0 - Performance improvements, GPU particle acceleration, brand new Excalibird tutorial, and more

Links

• StackOverflow 2024 Survey – TypeScript is #5 in Programming Languages
• Zod - TypeScript-first schema validation
• QuickJS -- Embeddable JavaScript engine (like Lua for C)
• Nivo -- Charting library with TypeScript support

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

• Kamran Ayub - Host
• Erik Onarheim - Host

The Internet blows up as TypeScript reaches its next Pokemon evolution, and Kamran and Erik scramble to create an episode to pick up the pieces and make sense of it. In other news, TikTok announces Lynx, Angular gets some fetch upgrades, and Josh Goldberg releases v2 of create-typescript-app.

Week of March 3, 2025

• (07:09) - Big News: TypeScript Is Getting 10X Faster
• (07:48) - Big-ish News: Lynx Announced, the React Native Killer?
• (11:46) - News: Angular 19.2 Released
• (12:53) - News: Corepack Voted to Be Taken Out of Nodejs Core
• (13:35) - News: traits-ts Library Released
• (14:23) - Community Highlight: Dr. Axel's Corner
  • 2ality: My TS Sales Pitch
  • 2ality: Unions and intersections of object types
  • 2ality: Gist for createEnum helper
• (17:50) - Community Highlight: Build TypeScript-first BlueSky Bots and Feeds
• (18:27) - Community Highlight: JavaScript Fatigue Strikes Back
• (19:06) - Community Highlight: Josh Goldberg Releases v2 of create-typescript-app
• (19:50) - Community Highlight: Alex Teaches Us About Cosine Similarity in TypeScript
  • Plus: 3Blue1Brown explainer video about vector embeddings

Deep Dive: TypeScript is Being Ported to Go

• (22:04) - Deep Dive: TypeScript Is Being Ported to Go
• (23:58) - Deep Dive: Ports vs. Rewrites
• (24:50) - Deep Dive: Why Go?
• (25:54) - Deep Dive: Why Not Rust? Anders Explains
• (28:37) - Deep Dive: Why Not C#?
• (30:20) - Deep Dive: Go's Developer Experience
• (31:27) - Deep Dive: Running Concurrent Type Checking
• (32:54) - Deep Dive: 10X Is Just the Start
• (33:26) - Deep Dive: What's the Roadmap?
• (35:06) - Deep Dive: Impact on Ecosystem
• (43:32) - Deep Dive: Go Use It... in Go
  • Kevin Deng (sxzz) from the Vite team is maintaining a releases repository
• (45:20) - Deep Dive: What's Not Supported Yet
• (46:08) - Deep Dive: Props to the Team

Other Links

• Habitica, a habit tracker
• rspack, a Rust port of webpack
• (47:34) - Secrets of the Handb--Actually, Just Go Build t...

In this episode, we are joined by special guest Josh Goldberg to teach us about getting started with TypeScript from scratch. If you're new to TS, this is a great introduction! And if you've been using TS for a long time, you can explain to your friends where they should start to make their experience smoother. In the news, Nx gets support for project references and we curate some of the best TSGo content.

(00:36) Personal News

• IRL: Excalibur.js team will be at VGM Con (April 11-13, Minneapolis, MN)
• IRL: Erik is speaking at NDC Oslo (May 19-23)

(04:28) Introducing Josh Goldberg

• (07:10) - Josh's Work as a Full-time Open Sourcer
• (09:05) - Getting Started with TypeScript
  • Start with the TypeScript Handbook (it's free!)
  • Then, play with TypeScript in the playground
• (10:57) - Pain Points for New TypeScript Developers
• (12:41) - Benefits of TypeScript for Experienced Developers
• (14:43) - Getting Started with TypeScript
• (17:57) - CTA - create-typescript-app
  • v2 rewrite spawned Bingo, dev tooling automation blocks
• (20:54) - Use Cases For Create TypeScript App
• (26:58) - CTA Plans for the Future
• (29:10) - Learning Resources for TypeScript
  • Matt Pocock (Total TypeScript)
  • Cory House (Getting Started with TypeScript)
  • Basarat (TypeScript Deep Dive)
  • Code challenge: Advent of TS
  • Code challenge: Advent of Code
  • Code challenge: Type Challenges
• (32:17) - And of course, Josh's Book: Learning TypeScript!
  • Learn the why and theory
  • Blog and articles
  • Buy the book!
• (33:30) - Favorite Language Feature: Discriminated Unions
• (37:40) - Favorite Language Feature: Branded Types
• (38:58) - Creating TypeScript ESLint Rules
• (40:34) - Key Takeaways - Fun and Cool Stuff Happening!
  • SquiggleConf 2025 CFP is open!
• (42:29) - Future of TypeScript and Linting Innovations
  • Write your own TS linter

(45:02) Where to Find Josh

• Website
• Follow on BlueSky @JoshuaKGoldberg
• Sponsor on GitHub
• Attend SquiggleConf 2025

(46:55) News for the Week of March 10, 2025

• TSGo, but we already covered that (TS-a-Go-Go, Ep 9)
• Deno 2.2.4 update adds enhancements to OpenTelemetry (OTel) support
• Nx 20.5 adds TS project reference support
• Cory House releases a new TypeScript course on Dometrain
• React Router 7.3 minor release
  • Experimental support for client contexts
  • Experimental support for route middleware
• (49:25) - Community Updates
  • Dr. Axel's Corner - Dive deeper with this TSGO Explainer
  • Sxzz (Kevin from Vite) created a TSGo playground with WASM
  • TSGo community content
    •