This PR improves checking of the in operator:

In the expression key in obj, we now require the type of key to be assignable to string | number | symbol. Previously we allowed key to be of an uncon...

Today we’re excited to announce our beta 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, functionality to better support ESM projects…

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…

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

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...

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...

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

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…

Yep. We got the Doom engine running purely in TypeScript types. Like. For real. We’ve prepared two more videos, one answering “why we did this” (storytime format) and another answering “how we did this” (technical deep-dive). What would you like to hear…