Deno 2.5, Type-safe Configs and Forms, and Underrated TS Features | News | Ep 35

TypeScript.fm - The Friendly Show for TypeScript Developers

News of the week of September 8, 2025: Deno 2.5 adds a bunch of DX improvements, Fresh 2.0 is out of beta, and a supply chain attack mitigation for pnpm users. From the community: Val Town's OSS TypeScript editor, discussing underrated TS features, and tools/libraries to help make your configs, secrets, and forms type-safe.

Chapters

• (00:00) - Welcome to the Show
• (05:46) - News: TSGo Adds JSDoc Support to LSP
• (07:08) - News: Deno 2.5 Released
• (15:05) - News: Deno Fresh 2.0 is Now Out of Beta
• (15:28) - News: rspack and webpack Add Dynamic Import Tree Shaking
• (16:26) - News: pnpm 10.16 adds minimumReleaseAge Config Option
• (18:10) - Community Highlight: Dr. Axel's Corner
• (18:51) - Community Highlight: Lessons from npm Security Failures
• (23:47) - Community Highlight: Val Town's Open Source TS Editor
• (26:12) - Community Highlight: Lint Rules Spreadsheet by Josh Goldberg
• (28:16) - Community Highlight: Most Underrated Features in TS?
• (31:48) - Tool Watch: confkit Provides Type-safe Config and Secrets
• (32:46) - Library Watch: taxum, a TypeScript-first HTTP Framework
• (33:35) - Library Watch: conformal is a Type-safe FormData and Submissions Library
• (34:31) - Community Highlight: Why Using Bun in Production (Maybe) Isn't the Best Idea
• (39:14) - Secret of the Handbook: Analyze Trace Tool
• (40:37) - Cool Watch: Restoring Old GameBoys and Game Systems
• (42:04) - Cool Game: Assassin's Creed Mirage
• (44:37) - The Minnesota Long Goodbye

News

• TSGo
  • Full JSDoc Support in LSP (#1702) by Anders
  • TypeScript Build Watch Mode (#1684) by Sheetal
• Deno 2.5 + Fresh 2.0
• Rspack 1.5.3 features advanced tree shaking for dynamic import members
• Pnpm 10.16 adds “minimumReleaseAge” to help mitigate supply chain attacks

From the Community

• Dr. Axel’s Corner
  • Learning web development: Implementing web servers
  • Learning web development: Authenticating users with plain Node.js
• OneUpTime: Lessons from npm's Security Failures
• Wojciech Maj: Why using Bun in production (maybe) isn't the best idea
• Val Town’s open source TS editor was rewritten from scratch
• Josh Goldberg is tracking common rules across linters for Flint
• Reddit discussion: Name underrated things in Typescript
• Tool watch: https://www.confkit.dev/ (h/t HackerNews) -- Type-safe config and schemas that work across all runtimes
• Library watch: https://taxum.js.org/ (h/t DASPRiD) -- TypeScript-first HTTP framework
• Library watch: https://github.com/marcomuser/conformal -- Type-safe FormData and submissions

Cool Stuff

• Cool Tool: https://github.com/microsoft/typescript-analyze-trace
• Cool Watch: Retrofitting a broken Game Boy with modern upgrades
• Now playing: AC: Mirage

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)