TypeScript.fm - The Friendly Show for TypeScript Developers

News for the week of March 3, 2026: minor updates in TypeScript 6 Release Candidate, what's new in Astro 6 updates, and latest Chrome revives Sanitizer API. From the community: when to use return types, remembering service workers, and why Patreon took seven years to adopt TypeScript.
Sponsored by Excalibur.js
Excalibur.js is the free and open source friendly TypeScript 2D game engine for the web. Learn to make web games with TypeScript or JavaScript! Excalibur comes out-of-the-box with everything you need, like physics, sprites, animations, sound effects, and first-party plugins for popular 2D gamedev tools.
Homepage and Docs: https://excaliburjs.com
Make Your First Game in 10 Minutes
Join the Discord: https://discord.gg/9UemP985Uy

Chapters

(00:00) - Welcome to the Show

(05:35) - News: TypeScript 6 Release Candidate

(07:17) - News: TypeScript 7 Buzz

(07:54) - News: TC39 Intl Era Advances to Stage 4

(08:41) - News: TC39 error.prototype.stack Advances to Stage 2.7

(09:04) - News: Node is Switching Up Release Schedule

(09:46) - News: Chrome Moves to Two Week Release Cycle

(10:43) - News: Chrome 146 Re-introduces Web Sanitizer API

(13:27) - News: Astro 6 Brings the Noise

(20:11) - News: Eleventy Will Become Build Awesome in v4

(21:11) - News: What's New in Svelte for March 2026

(21:32) - PSA: Qwik Remote Code Execution Vulnerability

(22:15) - Library Watch: ArkType 2.2 Brings Runtime Validated Functions

(26:00) - Library Watch: std-semver Ports JSR @std/semver to npm

(27:15) - Community Highlight: When to Use Return Types by Web Dev Simplified

(28:21) - Community Highlight: Whatever Happened to Service Workers? by Mauro Bieg

(30:05) - Community Highlight: Mitigating Supply Chain Attacks with pnpm

(33:28) - Community Highlight: F# in TypeScript

(34:11) - Community Highlight: Standardizing Source Maps by Jon Kuperman

(34:42) - Community Highlight: Patreon's Seven Years to TS

(36:01) - Community Highlight: Asana Scales with TypeScript and Scala Using GraalVM

(36:49) - Community Highlight: Josh Goldberg at AspireConf

(37:41) - Community Highlight: Flatten a Sphere with TypeScript

(38:27) - Community Highlight: Practical TypeScript by KCD

(39:26) - Secret of the Handbook: private Keyword vs. #private Syntax

(42:01) - Cool Tip: window.stop() API

(42:47) - Cool Quiz: How Well Do You Know Pokemon?

(43:42) - Cool Video: How Pokemon Stitched Together Maps on Gameboy

(44:41) - Cool Link: Union Types Coming to C#

(45:22) - Cool Game: Resident Evil 9

(46:20) - The Minnesota Long Goodbye

News
Announcing TypeScript 6.0 RC
TypeScript 7 buzz
TC39: Intl era & monthCode to Stage 4
TC39: Error.prototype.stack 
Node: Reminder 1 major release per year starting with 27 
Get features faster with Chrome's two-week release cycle
New in Chrome 146 (Stable channel)
Astro 6
Eleventy is now Build Awesome 
What’s new in Svelte: March 2026 
Library Watch
Announcing ArkType 2.2 Type-safe regex, validated functions, and native Standard Schema definitions 
Port of Deno @std/semver (via Kevin Deng)
From the Community
Web Dev Simplified:  Stop Writing TypeScript Code Like This 
Mauro Bieg: Whatever happened to JavaScript Service Workers?
pnpm: Mitigating supply chain attacks
Simon Treanor: The Functional Blueprint: Teaching TypeScript to Speak F#
Jon Kuperman: Source Maps: Shipping Features Through Standards
Patreon: Seven Years to TypeScript: Migrating 11,000 Files
Asana: Scaling LunaDb, our in-house declarative data loading system
Josh Goldberg: TypeScript with Aspire at Aspire Conf — March 23, 9:00a PT 
Astronomy with TypeScript: How do you flatten the Sphere
Kent C Dodds: Practical TypeScript: Foundations to Fluency
Discussion: Why doesnt TS merge `private` and `#` syntax in the language? : r/typescript 
Cool Links
Excalibur-based Steam Game: Now THAT's a Big Dragon!
Web Weekly newsletter 
Pokémon Quiz 
C# Unions are Finally Here (by Ben Abt)
Music
Seahorse Dreams by Kubbi (Spotify)

News for the week of Feb 23, 2026: highlights from the State of JS survey, Node is revamping its release schedule, and Bun finally gets stage 3 decorator support. From the community: Deno's code-first sandboxes, typesafe `Map.has()`, and Electrobun rendering with WebGPU.
Support Our Troop
🍪 Buy Girl Scout Cookies!
Sponsored by Excalibur.js
Excalibur.js is the free and open source friendly TypeScript 2D game engine for the web. Learn to make web games with TypeScript or JavaScript! Excalibur comes out-of-the-box with everything you need, like physics, sprites, animations, sound effects, and first-party plugins for popular 2D gamedev tools.
Homepage and Docs: https://excaliburjs.com
Make Your First Game in 10 Minutes
Join the Discord: https://discord.gg/9UemP985Uy

Chapters

(00:00) - Welcome to the Show

(06:37) - News: State of JS Survey Insights

(16:48) - News: Deno 2.7 Marks Temporal API as Stable

(19:24) - News: Node 24.14.0 and 25.7.0 Releases

(21:13) - News: Node's New Release Schedule in 2027

(25:13) - News: Bun 1.3.10 Ships Stage 3 Decorators and Native REPL

(28:04) - News: WebMCP Becomes a W3C Standard

(33:20) - News: React Foundation Officially Launches

(34:57) - Library Watch: unbash Parses Bash in Pure TypeScript

(36:29) - Library Watch: decoders, a Zod-alternative That Reads Like TS

(37:30) - Community Highlight: What's New in ViteLand February 2026

(38:42) - Community Highlight: Safe Cloud Execution with Dino Sandboxes

(40:00) - Community Highlight: Fixing Map.has() by Typed Rocks

(41:12) - Community Highlight: The React Doctor Is In by Better Stack

(41:59) - Community Highlights: Electrobun with Native Window + WebGPU

(43:55) - Community Highlight: TypeScript Foundations Workshop by KCD

(45:33) - Cool Link: Firefox 148 Ships CSS shape() Support

(46:36) - Cool Link: Hank Green on Why AI Scares Him

(47:47) - Cool Link: Rebuilding Pokemon with OO Programming

(48:52) - Cool Link: MCP is Dead. Long Live the CLI.

(52:36) - Cool Cookies: Support My Girl Scout

(54:44) - The Minnesota Long Goodbye

News
State of JS 2025
Deno 2.7: Temporal API, Windows ARM, and npm overrides
Node 24.14.0 and 25.7.0 releases
Node 27 release schedule sneak peek
Bun 1.3.10 introduces native REPL, TC39 Stage 3 decorators
WebMCP: Expose your web app as MCP tools (client-side) (see Kamran's Bsky thread)
The React Foundation: A New Home for React Hosted by the Linux Foundation
Library Watch
Unbash: zero dep bash parser written in TS 
decoders: a Zod alternative (via Chris Nicholas)
From the Community
VoidZero: What's New in ViteLand: February 2026
Deno Safe Cloud Code Execution with Snapshots (Python Pre-Installed, Zero Wait)
TypeRocks: I Fixed TypeScript's Map.has() Type Inference (Here's How)
Better Stack: I thought I was a Senior React Dev... until I ran React Doctor.  
Electrobun: Now with Native Window + WebGPU 
KCD has a new workshop, Practical TypeScript
Cool Links
Cool Tip: Firefox 148 and CSS shape() 
Cool Read: MCP is dead. Long live the CLI 
Cool Watch: Rebuilding Pokémon with Object Oriented Programming
Cool Watch: Hank Green on AI: This is Going to be Very Messy
Cool Read: Red Queen Effect
Music
Seahorse Dreams by Kubbi (Spotify)

News for the week of Feb 16, 2026: npmx.dev is a better frontend for npm, Chrome 145 includes some cool new toys, and we figure out that Knip is pronounced with a hard-K. From the community: fun with generics, Next.js adds an MCP server, and why OSS maintainers need to breaks (as should we all).
Chapters

(00:00) - Welcome to the Show

(07:10) - News: We Made Our First Video Podcast Episode

(09:02) - News: TS Native Gets Remote AST Speed-up of 6.4X

(09:59) - News: npmx.dev is a New Frontend for npm Registry

(14:13) - News: Chrome 145 Brings Some Cool New Devtools

(18:41) - News: Safari 26.4 Looks to Improve CSS Grid Support

(19:35) - Library Watch: Knip 5.85.0 Cleans Up Codebase Cruft

(22:30) - Library Watch: @wasmground/emit Builds WASM with TS

(23:58) - Library Watch: Tempest Generates Types from PHP

(25:33) - Library Watch: runner 5.5.0, an All-in-one TS Framework

(28:02) - Community Highlight: Build a Game Series by Deno

(30:02) - Community Highlight: Next.js MCP Server

(33:29) - Community Highlight: What is TC39 by Shop Talk Show

(34:32) - Community Highlight: Open Source Developers Need to Take Breaks

(38:16) - Community Highlight: Fun with TS Generics by Adam Rackis

(39:38) - Bleet of the Week

(39:59) - Cool Link: 400 Car Batteries Wired Together

(40:39) - Cool Link: FragCoord.xyz is a ShaderToy Alternative

(41:37) - Cool Link: Recreating a BBC Micro Game in TypeScript

(43:19) - Cool Link: YootTower, Open Source Code for SimTower

(44:33) - The Minnesota Long Goodbye

Sponsored by Excalibur.js
Excalibur.js is the free and open source friendly TypeScript 2D game engine for the web. Learn to make web games with TypeScript or JavaScript! Excalibur comes out-of-the-box with everything you need, like physics, sprites, animations, sound effects, and first-party plugins for popular 2D gamedev tools.Homepage and Docs: https://excaliburjs.com
Make Your First Game in 10 Minutes
Join the Discord: https://discord.gg/9UemP985Uy

News
Watch our TS 6.0 “Read Along” Vodcast!
TS native preview got a 6.4X perf increase for “remote” AST materialization
npmx.dev is not a package manager
Chrome: What's new in DevTools (Chrome 145)
Safari: 26.4 beta improves CSS grid support
Library Watch
Knip includes monorepo memory optimizations
@wasmgroundup/emit lets you build WASM with TypeScript for better learning
Tempest can generate types from PHP files
runner shaved the yak until it got bald  
From the Community
Deno: https://deno.com/blog/build-a-game-with-deno-6 
Next.js: Building Next.js for an agentic future 
Shop Talk Show: TC39 and how it works (via Rob Palmer) 
The Register: OSS Maintainers take a break (via Daniel Roe) 
Frontend Masters: Fun with TypeScript Generics
Cool Links
Cool Watch: 400 car batteries wired together!! 
Cool Tool: FragCoord is a ShaderToy alternative
Cool Game: TypeScript version of BBC Micro game
Cool Code: YootTower is the OG SimTower source code
Music
Seahorse Dreams by Kubbi (Spotify)

News for the weeks of Feb 2 and Feb 9, 2026: TypeScript 6.0 beta drops, ESLint 10 config updates, and Electrobun 1.0 release. From the community: TypeScript types are not a security feature and breaking changes in TS 6.0 you need to know.
Chapters

(00:00) - Welcome to the Show

(04:53) - News: TypeScript 6.0 Beta

(17:28) - News: ESLint 10 Brings Flat Config Changes

(19:47) - News: Deno Deploy is Now Generally Available

(26:27) - PSA: React Native CLI Metro4Shell Vulnerability

(28:32) - Library Watch: TanStack Query Now Supports Preact

(28:58) - Library Watch: Nuxt Test Utils v4 Supports Vitest 4

(29:18) - Library Watch: Handy, a Desktop App for Speech-to-Text

(30:40) - Library Watch: Colyseus 0.17 for Multiplayer Games

(31:03) - Library Watch: Tabularis, a Minimalist TypeScript-based DBMS

(31:47) - Library Watch: Electrobun 1.0 Release

(32:52) - Community Highlight: What's New in ViteLand January 2026

(33:07) - Community Highlight: n8n RCE in 4 Acts by Fetih Çelik

(36:32) - Community Highlight: TypeScript 6.0 Changes by TypeRocks

(37:01) - Community Highlight: TypeScript Online Game Template

(38:29) - Bleet of the Week

(39:10) - Cool Link: Types in JSDoc

(39:52) - Cool Link: Esoteric Math

(40:49) - Cool Link: Virtual DSLs

(42:32) - Cool Link: Someone Building an NES JRPG

(43:05) - The Minnesota Long Goodbye

Sponsored by Excalibur.js
Excalibur.js is the free and open source friendly TypeScript 2D game engine for the web. Learn to make web games with TypeScript or JavaScript! Excalibur comes out-of-the-box with everything you need, like physics, sprites, animations, sound effects, and first-party plugins for popular 2D gamedev tools.Homepage and Docs: https://excaliburjs.com
Make Your First Game in 10 Minutes
Join the Discord: https://discord.gg/9UemP985Uy
News
Announcing TypeScript 6.0 Beta
ESLint v10
Deno Deploy is GA
Introducing Deno Sandbox
PSA: React Native CLI Metro4Shell Vulnerability
Library Watch
Preact is added to TanStack Query
Nuxt Test Utils v4 supports Vitest 4
Handy is a universal speech-to-text app
Colyseus 0.17 lets you build multiplayer games with full-stack TypeScript safety
Tabularis: a lightweight developer-focused database management tool
Electrobun 1.0 release is the Electron alternative you’ve been waiting for
From the Community
VoidZero: What’s New in ViteLand January 2026
Fatih Çelik: n8n RCE(s): A Tale of 4 Acts (CVE-2025-68613 & CVE-2026-25049)
Typed Rocks: TypeScript 6: Breaking Changes You Need to Know 
TypeScript Online Game Template
Cool Links
Types in JSDoc: excalibur.js browser extension
Esoteric Math: Happy Numbers and Vampire Numbers
Virtual DSLs (via Dan Abramov)
Do you like old-school NES JRPGs?
Music
Seahorse Dreams by Kubbi (Spotify)

Mauro Bieg joins the two fools to talk about Mastro, a simple and minimal web framework and site generator. If 11ty and Astro had a baby, it might look like Mastro! With support for routing, HTML templating, streaming, and even reactive UI, Mastro might be a great fit for your next content-driven website.
Resources
Mastro Website
Mastro on GitHub
Mastro on BlueSky
Where to Follow the Team
Mauro on GitHub
Mauro on BlueSky
Chapters

(00:00) - Introducing Mauro Bieg

(03:12) - What is Mastro.js?

(05:39) - How Mastro Renders HTML

(10:04) - Comparing Mastro.js with Other Frameworks

(14:55) - Handling Server Requests in Mastro

(20:00) - Client and Server Separation

(26:39) - Client-Side Functionality with Reactive Mastro

(32:18) - Leveraging Web Standards and Native Runtime Features

(34:14) - Working with Multiple Runtimes

(40:31) - TypeScript Integration and Type Checking

(41:51) - Support for HTTP Streaming

(47:07) - How Mastro Performs

(49:01) - Getting Started with Mastro

(51:33) - Where to Find Mauro

Sponsored by Excalibur.js
Excalibur.js is the friendly TypeScript 2D game engine for the web. 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, tile maps, particles, and more.
Homepage and Docs: https://excaliburjs.com
Make Your First Game in 10 Minutes
Join the Discord: https://discord.gg/9UemP985Uy
Music
Seahorse Dreams by Kubbi (Spotify)