New ECMAScript Proposals, Cap'n Web, and TS on DOS/PlayStation | News | Ep 37

News of the week of September 22, 2025: new default option in TS 6.0, Jiti upgrade, and Cloudflare's on a tear. Plus, npm's security roadmap. From the community: Python-style kwargs, running TS on MS-DOS, and running JS on PlayStation.


Chapters




• (00:00) - Welcome to the Show



• (07:42) - News: Take the State of JS Survey 2025



• (08:25) - News: TS 6.0 Will Enable noUncheckedSideEffectImports by Default



• (09:09) - News: Jiti 2.6 is Faster Thanks to RSPack



• (11:14) - News: ECMAScript Proposal for Non-extensibility Applying to Private Fields



• (13:06) - News: ECMAScript Proposal for Array.prototype.pushAll



• (15:00) - News: ECMAScript Proposal for Iterator Chunking



• (16:04) - News: Introducing Cap'n Web, a New RPC System for the Web



• (20:20) - News: Code Mode, Generating TypeScript Clients for MCP Servers



• (25:57) - News: Cloudflare Workers Have Improved Node Compatibility



• (28:24) - News: GitHub's Plan for a Secure NPM Supply Chain



• (33:22) - News: Astro 5.14 Adds Svelte Async Rendering and React 19 Actions



• (34:05) - Community Highlights: Scrimba's Free TS Course



• (34:28) - Community Highlight: Python-style kwargs in TypeScript



• (37:24) - Community Highlight: Porting TypeScript to Run on DOS



• (39:44) - Community Highlight: Running JavaScript on PlayStation



• (41:28) - Community Highlight: Is effect-ts Really Good, Or is it Just Hype?



• (44:19) - Cool Links: Tiny Helpers



• (45:17) - Cool Read: Itch Game Shout-outs



• (45:58) - Cool Tool: Autogenerate HTTPS Domains for Vite Dev Servers



• (47:23) - Cool Link: Find Out If You Have Unclaimed Money or Property



• (49:31) - The Minnesota Long Goodbye




News

• PSA: State of JavaScript 2025 (https://survey.devographics.com/en-US...)
• TS 6.0 will enable "noUncheckedSideEffectImports" by default 🎉 (h/t Rob Palmer (https://bsky.app/profile/robpalmer.bs...) )
• Jiti 2.6 (https://bsky.app/profile/pi0.io/post/...) – runtime for TS/ESM in Node.js (http://node.js) is now using SWC/RSPack
• tc39/proposal-nonextensible-applies-to-private (https://github.com/tc39/proposal-none...) (h/t Rob Palmer (https://bsky.app/profile/robpalmer.bs...) )
• “This breaking change means that if you seal/freeze an object, it cannot later have private fields stamped upon it ❄️”
• DanielRosenwasser/proposal-array-push-all (https://github.com/DanielRosenwasser/...) (h/t Rob Palmer (https://bsky.app/profile/robpalmer.bs...) )
• “It lets you append many items into an existing array without running out of stack memory 👍”
• tc39/proposal-iterator-chunking (https://github.com/tc39/proposal-iter...) (h/t Rob Palmer (https://bsky.app/profile/robpalmer.bs...) )
• “It lets you make iterators that can chunk & window content”
• Cloudflare: Cap'n Web: a new RPC system for browsers and web servers (https://blog.cloudflare.com/capnweb-j...)
• Cloudflare: Code Mode: the better way to use MCP (https://blog.cloudflare.com/code-mode/)
• Cloudflare: A year of improving Node.js compatibility in Cloudflare Workers (https://blog.cloudflare.com/nodejs-wo...) (h/t James Snell (https://bsky.app/profile/jasnell.me/p...) )
• GitHub: Our plan for a more secure npm supply chain (https://github.blog/security/supply-c...)
• Metaframeworks: Astro 5.14 (https://astro.build/blog/astro-5140/)

From the Community

• Course: Free TypeScript tutorial (https://scrimba.com/learn-typescript-...) (Scrimba) 
• David Brownman (https://bsky.app/profile/xavd.id) : Python-style kwargs in TypeScript (https://xavd.id/blog/post/python-kwar...)
• Jimbly: From Steam to Floppy: Porting Modern TypeScript to Run on DOS (https://jimb.ly/2025/09/23/qauntumpul...)
• JSLegendWeb: You Can Now Make PS2 Games in JavaScript (   • You Can Now Make PS2 Games in JavaScript  )  
• Discussion: Is Effect-Ts really good or is it just hype? : r/typescript (  / is_effectts_really_good_or_is_it_just_hype  )





Cool Stuff

• Cool Tools: https://tiny-helpers.dev/ (by Stefan Judis (https://bsky.app/profile/stefanjudis....) ) 
• Cool Games: Minnesota-made games (https://itch.io/c/25218/minnesota-mad...) (by Martin...