As you can see, these codebases get a better speedup from dedicating more cores, but results will differ across projects and underlying machines. On the other hand, on machines with fewer CPU cores and less memory (e.g. CI runners) you may want to decrease this number to avoid unnecessary or incidental overhead. You can specify a value as low as --checkers 1, effectively making type-checking singl
We are excited to announce Prettier 3.9! This release brings major parser upgrades for Markdown, YAML, Flow, GraphQL, and Angular, along with formatting improvements for JavaScript and TypeScript (particularly in --no-semi mode). If you find Prettier valuable, please consider sponsoring us on OpenCollective or supporting the upstream projects we rely on. Your contributions help us keep improving t
Today we are excited to announce the Release Candidate of TypeScript 7.0! If you haven’t been following TypeScript 7.0’s development, this release is significant in that it is built on a completely new foundation. Over the past year, we have been porting the existing TypeScript codebase from TypeScript (as a bootstrapped codebase that compiles to JavaScript) over to Go. With a combination of nativ
Today we are absolutely thrilled to announce the release of TypeScript 7.0 Beta! If you haven’t been following TypeScript 7.0’s development, this release is significant in that it is built on a completely new foundation. Over the past year, we have been porting the existing TypeScript codebase from TypeScript (as a bootstrapped codebase that compiles to JavaScript) over to Go. With a combination o
Today we are excited to announce the availability of TypeScript 6.0! If you are not familiar with TypeScript, it’s a language that builds on JavaScript by adding syntax for types, which enables type-checking to catch errors, and provide rich editor tooling. You can learn more about TypeScript and how to get started on the TypeScript website. But if you’re already familiar with the language, you ca
Today we are excited to announce the Release Candidate (RC) of TypeScript 6.0! To get started using the RC, you can get it through npm with the following command: npm install -D typescript@rc TypeScript 6.0 is a unique release in that we intend for it to be the last release based on the current JavaScript codebase. As announced last year (with recent updates here), we are working on a new codebase
Build ultra fast, tiny, and cross-platform desktop apps with TypeScript. Two years ago I paused co(lab) to build the desktop app framework I wished existed. Now that I've shipped a stable v1, this post is me reflecting on this two-year sidequest that had me learning Zig, C, C++, and Objective-C. Why I Built This My intro to programming was Visual Basic 6 in the early 2000s, building desktop apps.
Today we are announcing the beta release of TypeScript 6.0! To get started using the beta, you can get it through npm with the following command: npm install -D typescript@beta TypeScript 6.0 is a unique release in that we intend for it to be the last release based on the current JavaScript codebase. As announced last year (with recent updates here), we are working on a new codebase for the TypeSc
We're excited to announce the alpha release of type-aware linting in Oxlint! Overview Following our technical preview in August, we're excited to announce that type-aware linting has reached alpha status. This milestone brings significant improvements in stability, configurability, and rule coverage. Type-aware linting enables powerful rules like no-floating-promises, no-misused-promises, and aw
Today we are excited to announce the release of TypeScript 5.9! If you’re not familiar with TypeScript, it’s a language that builds on JavaScript by adding syntax for types. With types, TypeScript makes it possible to check your code to avoid bugs ahead of time. The TypeScript type-checker does all this, and is also the foundation of great tooling in your editor and elsewhere, making coding even e
Today we are excited to announce the availability of TypeScript 5.9 Beta. To get started using the beta, you can get it through npm with the following command: npm install -D typescript@beta Let’s take a look at what’s new in TypeScript 5.9! Minimal and Updated tsc --init Support for import defer Support for --module node20 Summary Descriptions in DOM APIs Expandable Hovers (Preview) Configurable
This past March we unveiled our efforts to port the TypeScript compiler and toolset to native code. This port has achieved a 10x speed-up on most projects – not just by using a natively-compiled language (Go), but also through using shared memory parallelism and concurrency where we can benefit. Since then, we have made several strides towards running on large complex real-world projects. Today, w
After a year of active development: Zod 4 is now stable! It's faster, slimmer, more tsc-efficient, and implements some long-requested features. Huge thanks to Clerk, who supported my work on Zod 4 through their extremely generous OSS Fellowship. They were an amazing partner throughout the (much longer than anticipated!) development process. For a complete list of breaking changes, refer to the Mig
8.26.0 (2025-03-03) 🚀 Features support TypeScript 5.8 (#10903) eslint-plugin: [no-unnecessary-type-parameters] special case tuples and parameter location arrays as single-use (#9536) eslint-plugin: [no-unused-var] handle implicit exports in declaration files (#10714) eslint-plugin: [explicit-module-boundary-types] add an option to ignore overload implementations (#10889) eslint-plugin: [unified-s
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