Microsoft Announcing TypeScript 7.0 Beta

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 of native code speed and shared memory parallelism, TypeScript 7.0 is often about 10 times faster than TypeScript 6.0.

Don’t let the “beta” label fool you – you can probably start using this in your day-to-day work immediately. The new Go codebase was methodically ported from our existing implementation rather than rewritten from scratch, and its type-checking logic is structurally identical to TypeScript 6.0. This architectural parity ensures the compiler continues to enforce the exact same semantics you already rely on. TypeScript 7.0 has been evaluated against the enormous test suite we’ve built up over the span of a decade, and is already in use in multiple multi-million line-of-code codebases both inside and outside Microsoft. It is highly stable, highly compatible, and ready to be put to the test in your daily workflows and CI pipelines today.

For over a year we’ve been working with many internal Microsoft teams, along with teams at companies like Bloomberg, Canva, Figma, Google, Lattice, Linear, Miro, Notion, Slack, Vanta, Vercel, VoidZero, and more to try out pre-release builds of TypeScript 7.0 on their codebases. The feedback has been overwhelmingly positive, with many teams reporting similar speedups, shaving off a majority of their build times, and enjoying a much more lightweight and fluid editing experience. In turn, we feel confident that the beta is in great shape, and we can’t wait for you to try it out soon.

Editor Experience​

TypeScript 7.0’s performance improvements are not limited to the command line experience – they also extend to the editor experience too. The TypeScript Native Preview extension for VS Code provides a seamless way to try out TypeScript 7.0 in your editor, and has seen widespread use.

Since it first debuted, we’ve added in missing functionality like auto-imports, expandable hovers, inlay hints, code lenses, go-to-source-definition, JSX linked editing and tag completions, and more. Additionally, we’ve rebuilt much of our testing and diagnostics infrastructure to make sure the quality bar is high.

This extension respects most of the same configuration settings as the built-in TypeScript extension for Visual Studio Code, along with most of the same features. While a few things are still coming (like semantics-enhanced highlighting, more-specific import management commands, etc.), the extension is already powerful, stable, and fast.

Upcoming Work​

In the coming weeks, we expect to ship a more efficient implementation of --watch, and meet parity on declaration file emit from JavaScript files. We will also be working on minor editor feature gaps like “find file references” from the file explorer, and surfacing the more granular “sort imports” and “remove unused imports” commands instead of just the more general “organize imports” command.

Beyond this, we’ll be developing a stable programmatic API for TypeScript 7.1 or later, improving our real-world testing infrastructure, and addressing feedback.

The Road to TypeScript 7.0​

With TypeScript 7.0 Beta now available, the team is focusing on bug fixes, compatibility work, editor polish, and performance improvements as we move toward a stable release. Our current plan is to release TypeScript 7.0 within the next two months, with a release candidate available a few weeks prior. The release candidate will be the point where we expect TypeScript 7’s behavior to be finalized, with changes after that focused on critical fixes to regressions.

Between now and then, we would especially appreciate feedback from trying TypeScript 7.0 on real projects. If you run into any issues, please let us know on the issue tracker for microsoft/typescript-go so we can make sure the stable release is in great shape.

We also encourage you to share your experience using TypeScript 7.0 and tag @typescriptlang.org on Bluesky or @[email protected] on Mastodon, or @typescript on Twitter.

Our team is incredibly excited for you to try this release out, so try it today and let us know what you think. Happy hacking!

– The TypeScript Team