Episode Details

News of the week of July 21, 2025: Deno Fresh 2.0 is in alpha, TS 5.9 RC has some small changes, and beware the latest eslint-config-prettier supply chain attack. From the community: learn TypeScript for free in an hour, master generics through Soduku, run TS in the browser without a build step, and a library for modern TS dependency injection.

Chapters

• (00:00) - Introduction and Personal News
• (07:14) - News: Try Out the Deno Fresh 2.0 Alpha
• (08:32) - News: TypeScript 5.9 RC Includes Some Small Fixes
• (09:22) - News: TSGo Adds @satisfies Support for JSDoc
• (09:44) - PSA: eslint-config-prettier Supply Chain Attack
• (10:35) - Correction: tsgolint and TSL Clarifications
• (12:25) - Community Highlight: Learn TS in One Hour by freeCodeCamp
• (12:53) - Community Highlight: Mastering TypeScript Mysteries by Sweta Tanwar
• (13:37) - Community Highlight: Using BigInt to Make Sure a String is a Well-formed Integer
• (14:38) - Community Highlight: tsbro Runs TypeScript in the Browser
• (16:28) - Community Highlight: pure-ts-mock is a Standalone Mocking Library
• (17:31) - Community Highlight: Custom SSR for Lit Web Components Using Deno Emit
• (19:33) - Community Highlight: Mastering TypeScript Types by Laxman Rathod
• (20:19) - Community Highlight: Building TypeScript Apps with Bun and Electron with electrobun
• (21:08) - Secret of the Handbook: const Generics
• (23:06) - Cool API: navigator.sendBeacon for Analytics
• (24:43) - Cool Lib: es-toolkit, A Modern JavaScript Utility Library
• (25:26) - Cool Lib: di-wise, a Zero Deps Dependency Injection Library for TS
• (26:29) - Cool Read: NIH is Far Cheaper Than the Wrong Dependency

• Deno Fresh 2.0 is an alpha
• Announcing TypeScript 5.9 RC 
• Popular npm linter packages hijacked via phishing to drop malware 

From the Community

• freeCodeCamp: Learn TypeScript – Crash Course for Beginners (1 hour free course)
• City.js Conf: Sweta Tanwar - Mastering TypeScript Mysteries
• Interesting Type Inference Post using BigInts (Playground Link)
• stagas/tsbro: TypeScript for the Browser
• pure-ts-mock (bweet) is a minimalist, type-safe mocking library
• Matt Jennings pointed out a neat way to do SSR with Web Components (Lit) using Deno Emit and Deno Bundle 
• Laxman Rathod: Ma