TypeScript.fm - The Friendly Show for TypeScript Developers

In this episode with Josh Goldberg, maintainer of TypeScript ESLint, we dive into his latest research project, Flint. The goal of Flint is to test different hypothesis on how to architect a modern, hybrid-native JavaScript and TypeScript linter. What happens when every rule can be type-aware? Can you write lint rules in TypeScript and run them with near-native performance? How can error messages be more helpful for humans and agents alike? How can the configuration and plugin system be re-designed so it's less magical and has more type safety? These are the kinds of questions the Flint team is exploring and we talk with Josh about how things are progressing and where Flint's future is headed.
Josh's Links
Flint.fyi
JoshuaKGoldberg.com
Flint Discord
Josh on BlueSky
Josh on Fosstodon
Josh on GitHub
Chapters

(00:00) - Introducing Josh Goldberg

(01:43) - Introduction to Flint: A Modern, Hybrid Native Linter

(03:44) - What Problems is Flint Trying to Solve?

(05:26) - What's a Hybrid Linter?

(07:55) - How Does Flint Handle Type-aware Rules?

(10:45) - How Does Flint Improve Configuration DX?

(17:13) - How Does Flint Handle Error Messages?

(20:11) - What is Flint's Take on Errors vs. Warnings?

(23:17) - How is Flint Approaching Documentation?

(26:09) - Are There Differences in Dev Mode vs. CI Mode?

(28:29) - Does Flint Do Anything Special with Formatting?

(30:39) - Can Flint Fix Lint Issues?

(32:21) - Are There Advantages to Being TypeScript-first?

(33:55) - Separating Rules into Stylistic vs. Logical

(36:36) - Organizing and Categorizing Lint Rules to Improve DX

(38:17) - How to Get Involved with Flint

(40:00) - Flint's Roadmap for 2026 and Beyond

(43:28) - Where to Follow Josh's Work

(44:20) - 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
Music
Seahorse Dreams by Kubbi (Spotify)

News for the week of March 30, 2026: fun with UUIDs, Cloudflare gunning for Wordpress, and how OSS maintainers can defend against spearphishing attacks. From the community: a very Solid 6 hours, compiling TS to native UI code, and a super fast VIN decoder.
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

(05:01) - News: ECMA Fools Day

(07:22) - News: Cloudflare's EmDash Wants to Replace WordPress

(11:56) - News: Attackers Are Spear-phishing High Profile OSS Maintainers

(20:31) - News: BabylonJS v9, a 3D TypeScript Game Engine

(21:38) - News: Claude Code CLI Source Code Leaked

(24:00) - Library Watch: LayoutSans, Pure TypeScript 2D Layout Engine

(25:29) - Library Watch: PerryTS Compiles TS to Native UI on Any Platform

(28:55) - Library Watch: Gagen, Generating GitHub Actions with TypeScript

(30:48) - Library Watch: finprim, Type-safe Financial Primitives

(32:27) - Library Watch: GameDevLibrary, Excalibur.js Demos and Snippets

(34:14) - Highlight: How Vercel Made Turborepo 96% Faster

(37:16) - Highlight: oxlint and oxfmt Framework Compatibility Matrix

(37:46) - Highlight: Jake Archibald Highlights Proposed HTML-in-Canvas Feature

(38:49) - Highlight: Boston TS Club is Back

(39:17) - Highlight: Solid 2.0 with Ryan Carniato

(40:18) - Highlight: Cardog's Super Fast VIN Decoder in Corgi V3

(41:32) - Highlight: Fireship's Explainer on What Pretext Does

(43:48) - Bleets of the Week

(44:46) - Secret of the Handbook: Assertion Functions

(46:50) - Cool Link: neovim 0.12

(48:07) - Cool Watch: Hands-on with Artemis II

(49:14) - Cool Watch: Floating Point Math is Really Hard

(50:27) - Cool Read: Project Hail Mary

(52:39) - The Minnesota Long Goodbye

News
ECMA Fools Day
Every UUID Dot Com 
Hot Guids in your area 
Cloudflare: Announcing EmDash, Wordpress in TypeScript
Socket: Attackers Are Hunting High-Impact Node.js Maintainers in a Coordinated Social Engineering Campaign
BabylonJS v9 released 
Anthropic: Claude Code Source Code Leaked and Rewritten in Python
Library Watch
LayoutSans: Pure TypeScript 2D layout engine powered by Pretext
PerryTS: Compile TypeScript to native UI on any platform (React Native, .NET MAUI alternative) 
Gagen: GH actions in TypeScript
FinPrim: Financial Primitives in TypeScript
GameDevLib: Excalibur.js demos and snippets
From the Community
Vercel: Making Turborepo 96% faster
VoidZero: Oxlint Oxfmt support compatibility matrix
Jake Archibald: HTML-in-Canvas demos
Boston TS meetup is back! 
Ryan Carniato: 6 hours of Solid 2.0 talk
Cardog: Binary Indexes and What a Tiny LL M Learned About VINs 
Fireship: He just crawled through hell to fix the browser… 
Bleets of the week: Jokes on them and what types for plastic BBQ set? 
Secret of the Handbook: TypeScript assertion functions
Cool Links
Neovim 0.12
Floating point math is hard. Really, really hard. 
Hands On with the Artemis II Trajectory 
Project Hail Mary (audiobook)
Music
Seahorse Dreams by Kubbi (Spotify)

News for the week of March 23, 2026: Aspire 13.2 now supports TypeScript app hosts, Node.js security releases, and axios got got. From the community: Auvred's hybrid linting research, refactoring with generics, and sharing signals across the server-client boundary. Plus, using Claude to write a JS engine from scratch.
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

(05:29) - News: Node.js Security Fixes Available

(07:00) - News: Aspire 13.2 Brings TypeScript AppHost Support

(10:19) - News: Firefox 149 Adds Split View, Free VPN

(13:00) - News: Replay Adds React Render Debugging MCP Support

(13:55) - PSA: Axios Supply Chain Attack

(17:30) - Library Watch: Astro 6.1

(18:08) - Library Watch: ArrowJS 1.0, Agent UI Framework

(19:48) - Library Watch: OxMgr, a Rust Port of PM2

(21:13) - Library Watch: AshTypeScript 0.16.0 with Typed Channels

(22:11) - Library Watch: Pathwrite, a TypeScript Workflow Builder

(24:14) - Library Watch: Reflow, Durable Workflows for TypeScript

(26:28) - Library Watch: Pretext, Measure Text in Pure TypeScript

(28:15) - Community: Hybrid Type-aware Linting Research by Auvred

(29:54) - Community: State of Flint, Spring 2026 by Josh Goldberg

(31:40) - Community: On Refactoring with Generic Types by Radoslaw Miernik

(32:44) - Community: Bridging the Client-Server Boundary with Signals by Jovi

(33:45) - Community: Building a JavaScript Engine with Claude Opus by Paulo Matos

(38:19) - Community: WebMCP vs. MCP by Chrome Dev Blog

(39:25) - Community: Remodel Your TS Code with Decorators by Michael Dowden

(40:22) - Community: Vitest Crash Course by Web Dev Simplified

(40:36) - Bleet of the Week

(40:52) - Secret of the Handbook: unique symbol

(42:52) - Cool Video: Understanding Complex Type Systems

(43:37) - Cool Video: The Weirdest Result of Relativity You've Never Heard Of

(45:02) - Cool Video: Watch Matt Pocock Implement a Feature with Claude Code

(46:46) - The Minnesota Long Goodbye

News
Node.js: Node.js — Tuesday, March 24, 2026 Security Releases 
Aspire: Announcing Aspire 13.2Josh Goldberg: TypeScript + Aspire talk

Firefox: Firefox 149.0, split tabs, free VPN
Replay: React Renders MCP tool for debugging
PSA: Supply Chain Attack on Axios Pulls Malicious Dependency from npm 

Library Watch
Astro 6.1 – highlights
Arrow.js: TypeScript agent UI framework
Vladimir-Urik/OxMgr: Rust-alternative to PM2 process manager (language agnostic) 
AshTypeScript 0.16.0: TypedChannels (via Zach Daniel)
Pathwrite: A TypeScript-first multi-step workflow builder for every framework
Reflow: TypeScript workflow engine using SQLite
From the Community
Pretext: Text Layout in TypeScript (via conputer dipshit)
Golar gets a linter  (via Josh Goldberg)
Auvred: Hybrid type aware linting
Josh Goldberg: State of Flint: Spring 2026 
Radosław Miernik: On Refactoring with Generic Types 
Jovide Croock: Bridging the Server-Client Boundary with Signals (Bsky)
Paulo Matos: Agent builds a JS engine from scratch that passes test262 100% (via Rob Palmer)
Chrome Dev Blog: When to use WebMCP and MCP
Michael Dowden: Remodel Your TypeScript Code with Decorators 
Web Dev Simplified: Vitest Crash Course
Bleet of the week
Secret of the Handbook: Unique Symbols 
Cool Links
Video: Understanding complex type systems
Video: Weirdest result of relativity you've never heard of
Video: Real-world Claude building a feature step-by-step (Matt Pocock)

Music
Seahorse Dreams by Kubbi (Spotify)

News for the week of March 16, 2026: TypeScript 6.0 is stable and released, Next 16.2 is better for agents, and SolidStart V2 is coming soon. From the community: bloat in JavaScript projects (and what to do about it), a TypeScript CLI framework, and why Node.js needs a VFS and a better streams API.
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 6.0 is Officially Out

(07:36) - News: Meta Ports Flow to Rust

(08:54) - News: Next.js 16.2 is Better for Agents

(10:51) - News: Nuxt 4.4 Brings Custom Data Factories, Vue Router 5

(11:36) - News: SolidStart V2 Gets a Roadmap Update and Beta

(12:47) - News: Layoffs at Deno, Talented People for Hire

(13:16) - PSA: Node.js Security Releases for Tuesday, March 24, 2026

(13:49) - Library Watch: e18e Helps Identify Removable Dependencies

(15:35) - Library Watch: Knip v6 Gets 2-4x Faster

(16:33) - Library Watch: ZigTTP TypeScript Runtime in Zig

(20:36) - Library Watch: CrustJS, a Bun-native Framework for Building CLIs

(21:56) - Library Watch: numpy-ts Gets 8-10X Faster

(23:51) - Community: Three Pillars of JS Bloat by James Garbutt

(27:40) - Community: Rob Palmer Accepts Emca Recognition Award

(28:22) - Community: Why Node.js Needs a VFS by Matteo Collina

(29:41) - Community: JavaScript Needs a Better Streams API by James Schnell

(30:23) - Community: Tales from the Void Launch Week Recap

(32:10) - Community: OpenUI Rewrites Rust WASM Parser in TypeScript

(33:43) - Community: Animate Code Snippets by Joy of Code

(34:04) - Bleet of the Week

(34:21) - Cool Link: Customizable Selects by Jake Archibald

(34:58) - Cool Read: Ultimate Guide to Rebuilding Civilization

(35:50) - Cool Activity: Live Armored Combat

(37:38) - The Minnesota Long Goodnight

News
Announcing TypeScript 6.0 
Meta: Flow gets a Rust port
Next.js 16.2: AI Improvements
Nuxt 4.4
SolidStart v2 roadmap
PSA: Node.js Tuesday, March 24 security release
Library Watch
e18e CLI: Analyze and replace dependencies to reduce bloat
Knip v6: 2-4x faster than v5 (via Lars webpro.nl)
zigttp: A TypeScript runtime written in Zig (via djidja8.bsky.social)
Crustjs: A TypeScript-first Bun-native CLI framework (va sungkim)
numpy-ts: numpy-ts is now 8-10x faster with WASM : r/typescript 
From the Community
James Garbutt: The Three Pillars of JavaScript Bloat 
Rob Palmer: accepts Ecma Recognition award
Matteo Collina: Why Node.js Needs a Virtual File SystemListen to the Nodeland Banter episode

James Snell: We deserve a better streams API for JavaScriptThread and PR:  Experimental streams in node 

VoidZero: Tales from the Void: March Launch Week Recap | VoidZero 
OpenUI: Rewriting our Rust WASM Parser in TypeScriptRelated: Rust WASM vs. TS performance

Joy of Code: How To Animate Code Using TypeScript 🪄
Bleet of the week
Cool Links
Book: The Ultimate Guide to Rebuilding a Civilization 
Jake Archibald: Customizable <select> element
MN Armored Combat – enjoy the full-force contact sport of Buhurt
Music
Seahorse Dreams by Kubbi (Spotify)

News for the week of March 9, 2026: it's VoidZero all the way down, seriously. From the community: TanStack makes hotkeys simple, plus how good are AI agents at playing Runescape?
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

(05:53) - News: Vite 8 is Here!

(11:18) - News: Vite+ Alpha is Free and Open Source

(16:12) - News: VoidZero Launches void.cloud to Deploy Your Vite App

(20:17) - PSA: Hold Onto Your Butts for More Node Security Releases

(21:27) - Library Watch: Vitest 4.1 Adds Test Tags

(23:56) - Library Watch: Video.js v10 Beta

(26:06) - Library Watch: Effect v4 Beta

(28:07) - Library Watch: SyncPack v14 Syncs Monorepo Deps

(30:03) - Library Watch: angular-doctor Checks Health of Angular Apps

(30:56) - Community Highlights: Rust-like Error Handling in TS

(32:51) - Community Highlight: TanStack Hotkeys by Web Dev Simplified

(33:59) - Community Highlight: QR Code Engine in TS by Adam Surgenor

(34:44) - Community Highlight: Modern TypeScript Packaging by Francois Best

(35:31) - Community Highlight: Runebench Scores AI Agents on How Well They Play Runescape

(38:08) - Community Highlight: How Go Devs See TS 7 by Cup O Go

(39:16) - Bleets of the Week

(40:23) - Cool Link: Calculate Pi from Coin Flips by Stand-up Maths

(41:14) - Cool Link: Pi in the Sky Game by Coding Train

(41:37) - Cool Tool: Overtype, a Hassle-free Markdown Editor

(43:35) - The Minnesota Long Good Night

News
Vite 8 is out!
Vite+ is OPEN SOURCE and FREE!
VOID Cloud
PSA: Prep for Node.js March 24 security releases
Library Watch
Vitest 4.1 is out: test tags!
Video.js v10 Beta: Hello, World (again): 88% smaller bundle size
Effect v4 Beta: 71% smaller bundle size
Syncpack v14:  Dependency sync CLI for monorepos 
antonygiomarxdev/angular-doctor: health-checker CLI for Angular apps
From the Community
Abid Omar: Rust-like Error Handling in TypeScript
Web Dev Simplified: NEW Tanstack Hotkeys Library is Amazing 
Adam Surgenor: QR Code Generator in TS
François Best: Modern TypeScript packaging (French Language)
RuneBench: Evaluates AI agents by playing RuneScape
Cup O’ Go: Go Devs Talk About TypeScript 7
Bleets of the Week: This is how TypeScript is being ported...
JavaScript is Satan

Cool Links
Cool Update: KTOMG Caldera Update adds playthrough and completion tracking
Cool Pi Day: Calculating pi from coin flips (without randomness)
Cool Pi Day: Coding Challenge 169: Pi in the Sky Game 
Cool Library: OverType, the Markdown editor that's a textarea
Music
Seahorse Dreams by Kubbi (Spotify)