WebStorm Supports TS Go, V8 Stringifies JSON 2X Faster, and a TypeScript AI Conference | News | Ep 30

TypeScript.fm - The Friendly Show for TypeScript Developers

News of the week of August 4, 2025: WebStorm 2025.2 adds support for TypeScript Go language server (preview), V8 made JSON.stringify supa-supa-fast, and there's a new TypeScript AI conference on the block. From the community: recommended tools and libraries for TS developers, how to prevent ReDOS attacks, and an interview discussing how the JavaScript language evolves.

Chapters

• (00:00) - Welcome to the Show
• (04:52) - News: Erik's High Performance JavaScript Talk is OUT!
• (06:02) - News: WebStorm 2025.2 Features TypeScript Go Language Server Support
• (06:57) - News: V8 Improved JSON Stringify Perf by More than 2X
• (10:54) - News: Bun 1.2.20 Includes Type-level Assertions and TS 5.9 Support
• (12:24) - News: Mastra is Hosting a TypeScript AI Conference
• (19:58) - Community Highlight: How I Built CSS' light-dark() Function in TypeScript by Robert Hameetman
• (21:32) - Community Highlight: Type-Aware Linting with Oxlint
• (22:39) - Tool Watch: Prevent ReDOS Attacks with regolith
• (24:20) - Tool Watch: Filter tsc Errors by File or Folder Using tsef
• (25:57) - Community Highlight: Tools or Libraries That Make Your Life Easier With TypeScript
• (30:16) - Community Highlight: A Fast-paced Lumberjack Game Built with Excalibur.js
• (30:51) - Community Highlight: Daniel Ehrenberg on How JavaScript Evolves by Weekly DevBrew
• (31:10) - Community Highlight: Joke Bailey
• (31:51) - Secret of the Handbook: Indexed Types
• (36:20) - Cool Link: Speeding Up the semver Package
• (38:36) - Cool Link: Enhance.dev, an HTML-first Full Stack Web Framework
• (39:37) - Cool Link: mitata, a Benchmarking Tool That Loves You
• (40:44) - Cool Link: Why contenteditable on Android is the Absolute Worst
• (41:56) - Cool Link: Creating Legal Documents with Markdown
• (43:18) - The Minnesota Long Goodbye

News

• Erik’s talk is live! JavaScript Blazingly FAST! Lessons from a Game Engine
• WebStorm 2025.2: TypeScript-Go Language Server Support
• V8 engine: How we made JSON.stringify more than twice as fast
• Bun v1.2.20 includes type-level assertions and @bun/types fixes for TS 5.9
• Mastra announces TypeScript AI conference

From the Community

• Robert Hameetman: How I Built CSS's light-dark() in TypeScript
• Boshen: Oxlint working on type-aware linting with TSGo (experimental)
• JakeRoggenbuck/regolith: Safely write RegExp that are ReDOS-proof
  • PS. Listen to the TypeScript Security episode with Liran Tal
• iostreamer-X/tsef: CLI tool to filter tsc output and only show errors for specific files and directories
  • Could be a good companion to ts-migrating by Jason Yu
• Reddit: What tools and libraries do you use with TypeScript to make your dev life easier?
  • ts-pattern
  • Zod
  • Lefthook
  • Effect.ts and Xstate
  • neverthrow
• Timber Clone: An Excalibur game (written in TS!)
  • Source code: jyoung4242/TimberEx
• Weekly Dev Brew with Daniel Ehrenberg (President of Ecma International & TC39 veteran)
• Joke Bailey on Why is TS is so slow?!

Secret of the Handbook

• Typescript Indexed Types
  • Example 1
  • Example 2

Cool Stuff

• MarvinH: Speeding up the JavaScript ecosystem - Semver
  • Plus a cool profiling viewer, cpupro
• Enhance, an HTML-first full stack web dev framework
• evanwashere/mitata: benchmark tooling that loves you ❤️
• Contenteditable on Android is the Absolute Worst (But, ProseMirror looks really cool)
• petalo/legal-markdown-js: Write legal docs in Markdown and TS
• Supabase, hosted Postgres

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)