TypeScript 5.9 Beta, Redonkulous Linting, and a Community Enum Syntax Proposal | News | Ep 26

TypeScript.fm - The Friendly Show for TypeScript Developers

News of the week of July 7, 2025: We dive into the TypeScript 5.9 beta, an experimental Go linter for TS/JS, plus make sure you upgrade your Node.js versions! From the community: a new enum syntax proposal in case JS doesn't get native enums, TSL brings faster type-aware linting, and trashh_dev asks TypeScript: WTF?

Chapters

• (00:00) - Introduction and Personal News
• (07:10) - News: TypeScript 5.9 Beta
• (19:42) - News: tsgolint, an Experimental JS/TS Native Linter
• (21:56) - PSA: Upgrade Your Node.js 20.x, 22.x, and 24.x Installations
• (22:46) - Community Highlight: TSL, a New Type-aware Linter
• (25:00) - Community Highlight: New typescript-eslint Homepage Preview
• (26:04) - Community Highlight: New Enum Syntax Proposal by Naman
• (29:53) - Community Highlight: WTF TypeScript by trashh_dev
• (31:27) - Community Highlight: Migrating MorphKit to NativeScript with LLMs
• (33:47) - Community Highlight: ariadne-ts Brings Rust-style Diagnostic Messages to TS
• (35:20) - Cool Link: Get Current Weather in Your Terminal
• (36:12) - Cool Link: JSON Repair
• (37:09) - Cool Link: aws/jsii Lets You Consume TS Libs from Python, Java, and C#
• (39:38) - Cool Link: Check Road Conditions in Colorado with cotrip.org

Personal News

• Sorry for the delay, Kamran's on vacation!
• Follow Kamran's trip on Insta

News

• Announcing TypeScript 5.9 Beta
• tsgolint, an experimental proof-of-concept typescript-go powered JS/TS linter written in Go
• PSA: High-severity security patches coming to Node.js on Patch Tuesday for 24.x, 22.x, and 20.x release lines!

From the Community

• Arnaud Barré: Introducing tsl, an extension of tsc for type-aware linting!
• Joshua Goldberg: New TypeScript Eslint homepage
• Naman: New enum syntax for TypeScript
• Chris Batiste (trashh_dev): WTF Typescript
• nStudio: Morphing Swift to 100% TypeScript with NativeScript + AI
• Ariadne-ts v0.3.0: Beautiful Diagnostics in TypeScript (h/t Reddit)
• 
  

Cool Stuff

• aws/jsii allows code in any language to naturally interact with JavaScript classes
• COtrip.org – get road conditions in Colorado
• `curl wttr.in` -- Weather from the terminal
• josdejong/jsonrepair: Repair invalid JSON documents

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)