3️⃣2️⃣
❌ Wrong type inference with Capitalize and Uncapitalize utility types.

▶️ Playground

https://www.typescriptlang.org/play?#code/KYOwrgtgBAwg9gGzgJygbwErACZQLxQDMANFAOLLCj5QBMpAQgmMAL4DcAUJwMZwgBnRMAB0SAOYAKeEmQisuPEtiIUIpiwCUQA

https://www.typescriptlang.org/play?#code/MYewdgzgLgBAtgUwE4HMEwLwwDwEEA0MAQgHwAUAhgFwwEwBGNRAlJiTGQN4B0vFhvbvQC+zANwAoCaEiwArphicAHjTKsM7AORbhkmdBgA3RSrUb2ABj3TwhgO6nVHCzChI5CG7dkxlixFQEMjlCQLQyI0J7ZmZuZXV9OxAAGwRuFJAUMmVuKBAAGRB7ZABhCghg2LEYAHpavzzC4rKK9ABLCBgwEFgKGAAzOTBgKHbwIA

https://github.com/microsoft/TypeScript/issues/10727

thanks to @pbdqo

Mostly new JS features got support, and a particularly annoying old bug with union of arrays got fixed

https://devblogs.microsoft.com/typescript/announcing-typescript-5-2/

TypeScript

Announcing TypeScript 5.2 - TypeScript

Today we’re excited to announce the release of TypeScript 5.2! If you’re not familiar with TypeScript, it’s a language that builds on top of JavaScript by making it possible to declare and describe types. Writing types in our code allows us to explain intent…

https://devclass.com/2023/05/11/typescript-is-not-worth-it-for-developing-libraries-says-svelte-author-as-team-switches-to-javascript-and-jsdoc/

DEVCLASS

TypeScript is 'not worth it' for developing libraries, says Svelte author, as team switches to JavaScript and JSDoc • DEVCLASS

Svelte creator Rich Harris has made the case for switching from TypeScript to JavaScript and JSDoc, countering a […]

Nobody cares about TS Playground anymore. TS team declared issue bankrupcy and closed all the issues.

https://github.com/microsoft/TypeScript-Website/issues/2804

GitHub

Next Steps for the TypeScript Website (April 2023 edition) · Issue #2804 · microsoft/TypeScript-Website

Next Steps on the TypeScript Website TL;DR We're taking this time to deliver a smaller, higher-quality, lower-cost version of the website that serves our needs while still leaving us time to do...

Checked exceptions are no more.
https://github.com/microsoft/TypeScript/issues/13219#issuecomment-1515037604

GitHub

Suggestion: `throws` clause and typed catch clause · Issue #13219 · microsoft/TypeScript

The typescript type system is helpful in most cases, but it can’t be utilized when handling exceptions. For example: function fn(num: number): void { if (num === 0) { throw "error: can't d...

Here we gooo. Somebody started to work on an alternative standard library for TypeScript with sane types.

https://github.com/total-typescript/ts-reset

GitHub

GitHub - total-typescript/ts-reset: A 'CSS reset' for TypeScript, improving types for common JavaScript API's

A 'CSS reset' for TypeScript, improving types for common JavaScript API's - total-typescript/ts-reset

Source
https://twitter.com/bradzacher/status/1637995283555700736

Issue
https://github.com/microsoft/TypeScript/issues/17002

Playground
https://www.typescriptlang.org/play?#code/CYUwxgNghgTiAEYD2A7AzgF3gDwFzzimFQgE95MYBLFAcwG0BdAbgChX5Ps2B6H+AHoB+dlQBm8ABQBBGDCikAdFTSz5pSdgCUW+AG8OXXv2GsAvuyA

No particularly life-changing features in this major version.

https://devblogs.microsoft.com/typescript/announcing-typescript-5-0/

Microsoft News

Announcing TypeScript 5.0

Today we’re excited to announce the release of TypeScript 5.0! This release brings many new features, while aiming to make TypeScript smaller, simpler, and faster. We’ve implemented the new decorators standard, added functionality to better support ESM projects…