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

• 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: Mastering TypeScript Types: A Practical Guide from Basics to Advanced (h/t Shawn Wildermuth)
• Electrobun aims to be a complete solution-in-a-box for building, updating, and shipping ultra fast, tiny, and cross-platform desktop applications written in Typescript. Under the hood it uses bun to execute the main process and to bundle webview typescript, and has native bindings written in zig.
• Secret of the Handbook: Const Generics (playground link) (h/t sirpepe) 

Cool Stuff

• Navigator: sendBeacon() method
• toss/es-toolkit: A modern JavaScript utility library that's 2-3 times faster and up to 97% smaller—a major upgrade to lodash
• exuanbo/di-wise: Lightweight and flexible dependency injection library for JavaScript and TypeScript, w/wo ECMAScript decorators
• Clean Architecture in TypeScript | 弦而時習之 
• Lewis Campbell: NIH Is Far Cheaper Than The Wrong Dependency 
• Learn Wardley Mapping

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)