TypeScript

TypeScript

@typescriptlang.org

TypeScript is JavaScript with types and type-checking. Compiles down to JavaScript, runs where JavaScript runs.

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TypeScript
@typescriptlang.org

We know people will still need TS 6 for API usage. That's why there's a new `@typescript/typescript6` package that provides - the TypeScript 6 API - a separate `tsc6` binary Install it side-by-side with TypeScript 7, and don't worry about conflicts with `tsc`.

TypeScript
@typescriptlang.org

Under both `--watch` and in the editor, TypeScript 7 also now periodically releases unused type-checking state after enough idle time. For bigger projects, this should help reduce memory usage after peaking.

TypeScript
@typescriptlang.org

TypeScript 7 also brings parallelism with new 🧪 experimental 🧪 flags to tweak it. `--checkers` controls the number of type-checking workers, while `--builders` controls concurrent project builds. Use more on powerful machines, or scale down to fewer to control memory usage.

TypeScript
@typescriptlang.org

With this new version, TypeScript officially supports the language server protocol (LSP). So just pick your favorite editor and enjoy the speed improvements!

TypeScript
@typescriptlang.org

TypeScript 7 also ships a new `--watch` mode based on a Go port of Parcel's watcher. This brings more efficient and reliable file watching to TypeScript users across platforms. If you tried earlier versions of TS7, you can expect way less CPU usage on idle with `--watch`.

TypeScript
@typescriptlang.org

TypeScript 7 has all the editor features you love, like auto-imports, find-all-references, expandable hovers, inlay hints, code lenses, linked editing, semantic highlighting, import sorting, and more. They're just a lot faster now.

TypeScript
@typescriptlang.org

The 10x is real for many projects, and the speed improvements make a huge difference for teams at scale. TypeScript 7 drops time in CI, and minimizes delays in editors like VS & VS Code. That makes every part of the developer inner loop feel snappy.

TypeScript
@typescriptlang.org

The new codebase has been battle-tested by many teams (and entire companies) using it in production for over a year now. In fact, in the editor TypeScript 7 is *more* stable than TypeScript 6, with fewer crashes and lower memory usage.

TypeScript
@typescriptlang.org

In case you missed it, TypeScript 7 is a complete 10x faster version of the compiler & language server. It's a full port to parallelized native code. It runs faster, uses less memory, and is more stable than ever before.

TypeScript@typescriptlang.org

Today we're thrilled to announce our effort to port the TypeScript compiler and language service to native code, gaining a 10x speed boost in build times and editor responsiveness! devblogs.microsoft.com/typescript/t...

devblogs.microsoft.comA 10x Faster TypeScript - TypeScriptEmbarking on a native port of the existing TypeScript compiler and toolset to achieve a 10x performance speed-up.
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TypeScript
@typescriptlang.org

For teams moving gradually, `tsc` from TypeScript 7 can run side-by-side with the `tsc6` executable & API from TypeScript 6 using the new `@typescript/typescript6` package.

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TypeScript
@typescriptlang.org

Not yet mentioned in the blog post: TypeScript 7.0 will release unused type-checkers in the editor after enough idle time. For bigger projects, this should help reduce memory usage after peaking.

TypeScript
@typescriptlang.org

Speaking of which: TypeScript 7 also brings more parallelism to builds. ℹ️ Some tips ℹ️ `--checkers` controls the number of type-checking workers, while `--builders` controls parallel project-reference builds. Use more on powerful machines, or scale down to fewer to control memory usage.

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TypeScript
@typescriptlang.org

The rebuilt `--watch` mode is powered by a Go port of Parcel's watcher, giving TypeScript 7 efficient, stable cross-platform file watching. Expect much less CPU usage on idle.

TypeScript
@typescriptlang.org

Editor support has come a long way since we first debuted: auto-imports, expandable hovers, inlay hints, code lenses, JSX linked editing, semantic highlighting, sort imports, remove unused imports, and more are now available.

TypeScript
@typescriptlang.org

What's new in the RC since the beta? A couple of things, but worth calling out are - A rebuilt `--watch` mode - Stability improvements across the board - New ported editor features - Strategies for using less memory in editors

TypeScript
@typescriptlang.org

TypeScript 7.0 Beta is here! Built on a new native and parallelized foundation, it's already being used on multi-million line codebases. Read up more here and try it on your projects today! devblogs.microsoft.com/typescript/a...

devblogs.microsoft.comAnnouncing TypeScript 7.0 Beta - TypeScriptToday 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 comple...
TypeScript
@typescriptlang.org

TypeScript 6.0 is now available! This release brings better type-checking for methods, new standard library features, new module features for Node.js, and more! But most important, this release brings us one step closer to the upcoming native-speed 7.0! devblogs.microsoft.com/typescript/a...

devblogs.microsoft.comAnnouncing TypeScript 6.0 - TypeScriptTypeScript 6.0 is now available! TypeScript 6 is a stepping-stone release, aligning with the upcoming native-speed 7.0 release.
TypeScript
@typescriptlang.org

TypeScript 6.0 beta is now published! This release brings - inference improvements for functions - updates to package.json 'imports' - the Temporal APIs - alignments for the upcoming TypeScript 7.0 - & more! Try it today! devblogs.microsoft.com/typescript/a...

devblogs.microsoft.comAnnouncing TypeScript 6.0 Beta - TypeScriptToday 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 uni...
TypeScript
@typescriptlang.org

It's the first Monday of 2026! Awful, we know. But have you tried out TypeScript's native previews, or do you hate when your editor and builds are faster?

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TypeScript
@typescriptlang.org

It's the first Monday of 2026! Awful, we know. But have you tried out TypeScript's native previews, or do you hate when your editor and builds are faster?

TypeScript
@typescriptlang.org

We've got some updates on TypeScript 7! The new native port - can type-check any project - supports --build and --incremental - has rich editor features implemented - is still 10x faster and is ready for you to try today! devblogs.microsoft.com/typescript/p...

devblogs.microsoft.comProgress on TypeScript 7 - December 2025 - TypeScriptEarlier this year, the TypeScript team announced that we’ve been porting the compiler and language service to native code to take advantage of better raw performance, memory usage, and parallelism. Th...
TypeScript
@typescriptlang.org

Big news in this year's GitHub Octoverse report: TypeScript is now the most-used language on GitHub! We are thrilled and grateful to see the TypeScript and JavaScript community continue to grow and thrive. 🚀 Read up more at github.blog/news-insight...

github.blogOctoverse: A new developer joins GitHub every second as AI leads TypeScript to #1In this year’s Octoverse, we uncover how AI, agents, and typed languages are driving the biggest shifts in software development in more than a decade.
TypeScript
@typescriptlang.org

TypeScript 5.9 is now available! 📣 This release brings: ✅ An updated tsc --init ✅ Type-checking for the new 'import defer' ✅ Actual summaries in more DOM APIs ✅ Expandable quick info hovers (✨preview✨) and more! Read up more on our blog: devblogs.microsoft.com/typescript/a...

devblogs.microsoft.comAnnouncing TypeScript 5.9 - TypeScriptToday 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 mak...
TypeScript
@typescriptlang.org

TypeScript 5.8 is now out, with ✅ Better Checks on return expressions ✅ Support for require(esm) in --module nodenext ✅ --libReplacement to speed up program loading ✅ --erasableSyntaxOnly and more! Try it today! devblogs.microsoft.com/typescript/a...

devblogs.microsoft.comAnnouncing TypeScript 5.8 - TypeScriptToday we’re excited to announce the release of TypeScript 5.8! If you’re not familiar with TypeScript, it’s a language that builds on top of JavaScript by adding syntax for types. Writing types in our...