Breaking Changes in TS 6, a Calm Migration to Type Stripping, and Deno's #FreeJavaScript Campaign | News | Ep 33

TypeScript.fm - The Friendly Show for TypeScript Developers

News of the week of August 25, 2025: the two fools unpack the expected breaking changes to TSConfig in the upcoming 6.0 release, explain Node's latest LTS notable changes, and cover the latest in the JS trademark case from Deno. Plus, a PSA if you use Nx! From the community: making the case to migrate to Node's type stripping, a peek at Vitest 4, Zod's new Codecs feature, refactoring types, Rolldown is the opposite of a letdown, and a bunch of neat libraries/framework releases to watch.

Chapters

• (00:00) - Welcome to the Show
• (06:46) - News: TSGo Refactoring and Find Reference Enhancements
• (07:54) - News: Expect Some (Good) Breaking Changes in TS 6.0
• (12:26) - News: Node.js 22.19.0 LTS Notable Changes
• (18:13) - News: RsPack 1.5 Features Type Re-export Analysis
• (21:27) - News: Deno's GoFundMe to #FreeJavaScript
• (22:38) - PSA: Supply Chain Attack Against Nx Packages
• (25:49) - Community Highlight: Attend SquiggleConf 2025
• (26:43) - Case Study: How Calm.com Migrated to Node Type Stripping
• (30:13) - Community Highlight: Dr. Axel's Corner
• (33:01) - Community Highlight: Vitest 4 Sneak Peek
• (34:28) - Community Highlight: Zod 4.1 Codecs
• (36:39) - Community Highlight: Shout-out to Remco for Fixing JSX Typing Bugs
• (37:24) - Community Highlight: TypedRocks Shows You How to Refactor Type Definitions
• (38:27) - Community Highlight: Neovim Support for TSGo Spotted in the Wild
• (39:09) - Library Watch: csv-utils Helps You Deal with CSV Files
• (39:39) - Library Watch: contrastrast Provides WCAG-compliant Color Manipulation
• (41:16) - Case Study: Plaid Cut Build Time by 97% with Rolldown
• (42:17) - Framework Watch: Runner V4 Released
• (43:53) - Framework Watch: Ripple, a TypeScript UI Framework
• (45:20) - Community Highlight: Joke of the Week
• (45:48) - Secret of the Handbook: declarationMap
• (47:17) - Cool Link: MuJS for Embedding Scripting into C/C++
• (48:57) - Cool Link: Cory Doctorow is Kickstarting a Book
• (50:44) - Cool Watch: Learn Game Dev from a Nintendo Game Designer
• (52:29) - The Minnesota Long Goodbye

Personal News

• Kamran's new Qwik City Foundations course (requires subscription)
• Affected by the Verizon outage? Get some monies (or try visiting the Transfer Phone/PIN page in your account)
• Alternatively, switch to Mint and save some cheddar (that's Kamran's referral link :-)

News

• TS 6.0 proposed deprecations and breaking changes
• Node 22.19.0 LTS notable changes include a new CA certificate API and unflagging WASM modules (see: source-phase imports)
• Rspack 1.5 release features type re-export analysis
• Deno's GoFundMe for #FreeJavaScript
• PSA: Nx supply chain attack (write-ups from Socket.dev and TheHackerNews)

From the Community

• SquiggleConf: September 18-19
• Calm.com: How we migrated our Rush.js monorepo to Node type stripping
• Dr. Axel
  • JavaScript’s trademark problem
  • Learning web development: Web servers
  • Learning web development: JavaScript exceptions
  • Learning web development: JSON and processing files in Node.js
  • Learning web development: JavaScript Maps
• Vitest 4 will be faster!
• Zod creator explains 4.1's new codecs feature
• Uppy issue reveals a bug in JSX typing across ecosystem
• TypedRocks: Let’s Replace 100+ React Types with 3 Lines Of Code (Same Type Safety!)
• Possible sighting of neovim TSGo support
• Library watch: doeixd/csv-utils: Helpful utils for working with csv files or arrays of objects
• Library watch: ammuench/contrastrast: A library to determine text contrast based on WCAG Standards
• VoidZero: How PLAID Cut Build Times by 97% Migrating From Rollup To Rolldown
• Framework watch: Runner V4 released
• Framework watch: trueadm/ripple: the elegant UI framework for the web
• This week's TS Joke

Secret of the Handbook

The declarationMap config option significantly speeds up Project References performance in IDEs.

Cool Stuff

• MuJS: Introduction
• Cory Doctorow’s Kickstarter
• Legendary Nintendo game designer published 200+ videos on gamedev for free.

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)