I forgot so much more cool stuff. Type imports via JSDoc (Oleksandr T.), ${configDir} templating for tsconfig inheritance (Sheetal Kamat/Nandi), many fewer "cannot be named without reference" errors in dts emit (Wesley Wigham), a funny perf fix due to tracing (me), loads of bugfixes

Announcing TypeScript 5.5 Beta! 📣 Now with type predicate inference, more type narrowing, an @‍import tag for JSDoc, the --isolatedDeclarations flag, performance & reliability improvements, and much more! devblogs.microsoft.com/typescript/ann…

TypeScript 5.5 Beta is out 🎉 🔷 Checking: Inferred type predicates 🔷 Checking: RegExp syntax 🔷 JSDoc: Type-only imports 🔷 DTS: Isolated Declarations 🔷 DTS: transpileDeclaration API 🔷 DTS: Omit references by default 🔷 Package: 30% smaller install 🗑 Deprecated flags

I'm always excited by a TypeScript release. This one is epic, and what's all the notable is how much community involvement there was in it. I loved seeing the shout outs to Titian Cernicova-Dragomir 💙💛, Dan Vanderkam 🦋 and others in the release post. Recognition is so important and so appreciated ❤️

Wow, llvm.org just passed half a million commits to the monorepo! Congratulations to all of the 3811 contributors so far! If you love LLVM, consider star'ing the repo: github.com/llvm/llvm-proj…

TypeScript 5.5 RC is now out to try! We're looking for feedback on inferred type predicates, JSDoc imports, regex checking, ${configDir}, isolatedDeclarations, build optimizations, and more! devblogs.microsoft.com/typescript/ann…

TypeScript 5.5 RC is out 🎉 🔶 JS: Set Methods 🔷 Checking: Inferred type predicates 🔷 Checking: RegExp syntax 🔷 JSDoc: Type Imports 🔷 DTS: Isolated Declarations 🔷 DTS: transpileDeclaration API 🔷 Config: ${configDir} 🔷 Package: Shrinks 30% 🗑 Deprecated flags

TypeScript 5.5 is now available! 🎉✨ Now with ✅ Inferred Type Predicates ✅ RegEx syntax checks ✅ The JSDoc @‍import Tag ✅ ${configDir} for easier tsconfig inheritance ✅ --isolatedDeclarations ✅ Lots of new optimizations And more! Try it today! devblogs.microsoft.com/typescript/ann…

Thank you Josh Goldberg 🦋 for maintaining TypeScript-ESLint and for helping us build nicer applications with those squiggles Good luck with SquiggleConf! 👏

TypeScript 5.6 Beta is now out with ✔️ Errors on Suspicious Truthish/Nullish Checks ✔️ Iterator Methods like `.map()` and `.filter()` ✔️ Error-Tolerant --build Mode ✔️ --noCheck ✔️ Type-Checking Prioritized by Editor Viewports and more! Try it today! devblogs.microsoft.com/typescript/ann…

The release candidate for TypeScript 5.6 is now available for testing! Give it a try today for more new checks, ways to speed-up your builds, new JS features, and more! devblogs.microsoft.com/typescript/ann…

🚀TypeScript 5.6 is now available! 🚀 Now with ✅ New syntactic nullish/truthy checks ✅ Iterator helper methods & strictness checks ✅ Region-prioritized checking in editors ✅ Flexible --build behavior and more! Try it today! devblogs.microsoft.com/typescript/ann…

A couple of months ago, I decided to expand my work as an OSS enthusiast on the LLVM/Clang project. 🚀 Delighted to see that multiple changes I've made are included in the latest LLVM release discourse.llvm.org/t/llvm-19-1-0-…

ECMAScript excitement 😉 Congrats to Ron Buckton on advancing Extractors to Stage 2 at TC39 today 🎉 const C(x, y) = subject; It allows you to run arbitrary code during destructuring. This permits validation and normalization of values. github.com/tc39/proposal-…

TypeScript 5.7 beta is now available to try! Read up on what's new today! devblogs.microsoft.com/typescript/ann…

We just published the release candidate of TypeScript 5.7! Give it a shot and let us know what you think! devblogs.microsoft.com/typescript/ann…

TypeScript 5.7 is released 🎉 🔶 ES2024 library types 🔷 Checker: Never-initialized variables 🔷 Checker: Stricter JSON imports 🔷 Emit: Extension rewriting (*.ts to *.js) 🔷 DTS: Computed methods 🔷 IDE: Better tsconfig discovery 🔷 Perf: Code Caching ⚡️ 2.5x faster startup

I'm moving to bsky, please follow me there bsky.app/profile/otaras…

LIVE NOW with Anders Hejlsberg:

The Claude C Compiler is the first AI-generated compiler that builds complex C code, built by Anthropic. Reactions ranged from dismissal as "AI nonsense" to "SW is over": both takes miss the point. As a compiler🐉 expert and experienced SW leader, I see a lot to learn: 👇