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Microsoft Developer Blogs
devblogs.microsoft.com › dev blogs › typescript › announcing typescript 4.9
Announcing TypeScript 4.9 - TypeScript
November 15, 2022 - Here’s a quick list of what’s new in TypeScript 4.9! ... Since the Release Candidate, no changes have been made to TypeScript 4.9.
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npm
npmjs.com › package › typescript
typescript - npm
Latest version: 5.9.3, last published: 2 months ago. Start using typescript in your project by running `npm i typescript`. There are 61824 other projects in the npm registry using typescript.
      » npm install typescript
    
Published   Sep 30, 2025
Version   5.9.3
Author   Microsoft Corp.

programming language, superset of JavaScript that compiles to JavaScript

TypeScript (TS) is a high-level programming language that adds static typing with optional type annotations to JavaScript. It is designed for developing large applications. It transpiles to JavaScript. It is developed by … Wikipedia
Factsheet
Family ECMAScript
Designed by Microsoft,
Anders Hejlsberg,
Luke Hoban
Factsheet
Family ECMAScript
Designed by Microsoft,
Anders Hejlsberg,
Luke Hoban
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Wikipedia
en.wikipedia.org › wiki › TypeScript
TypeScript - Wikipedia
1 week ago - While 4.0 did not introduce any breaking changes, it added language features such as Custom JSX Factories and Variadic Tuple Types. TypeScript 5.0 was released on 16 March 2023 and included support for decorators.
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Devmio
devm.io › javascript › typescript-release
TypeScript 4.9: What’s New?
After the release of the beta version in September and the release candidate in early November, TypeScript 4.9 is now ready for production use. The new version introduces a number of improvements, most notably the new satisfies operator and ...
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GitHub
github.com › microsoft › typescript › releases
Releases · microsoft/TypeScript
420ff06 · Compare · Filter · Loading · There was an error while loading. Please reload this page. View all tags · TypeScript 5.8 RC Pre-release · Pre-release · For release notes, check out the release announcement. fixed issues query for Typescript 5.8.0 (Beta). fixed issues query for Typescript 5.8.1 (RC). Downloads are available on: npm · Assets 3 · Loading · There was an error while loading. Please reload this page. 9 people reacted ·
Author   microsoft
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GitHub
github.com › microsoft › TypeScript › issues › 50457
TypeScript 4.9 Iteration Plan · Issue #50457 · microsoft/TypeScript
April 22, 2022 - ... gantt dateFormat YYYY-MM-DD TypeScript 4.8 Stabilization Period : 2022-08-05, 2022-08-25 TypeScript 4.9 Beta Development : 2022-08-05, 2022-09-16 TypeScript 4.9 RC Development : 2022-09-16, 2022-10-28 TypeScript 4.9 Stabilization Period ...
Published   Aug 25, 2022
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Bitovi
bitovi.com › blog › typescript-4.9-features-and-improvements
TypeScript 4.9 Features and Improvements
October 6, 2023 - The release of TypeScript 4.9 on November 15th, 2022 introduces a new operator, performance improvements, plus a variety of new features and capabilities.
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Lightrun
lightrun.com › answers › microsoft-typescript-typescript-49-iteration-plan
TypeScript 4.9 Iteration Plan
Nothing is set in stone, but we ... 4.9 Beta Development : 2022-08-05, 2022-09-16 TypeScript 4.9 RC Development : 2022-09-16, 2022-10-28 TypeScript 4.9 Stabilization Period : 2022-10-28, 2022-11-15 todayMarker stroke-wid...
Find elsewhere
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GitHub
github.com › microsoft › TypeScript › wiki › Roadmap
Roadmap · microsoft/TypeScript Wiki · GitHub
This page outlines specific features and fixes that are scheduled or planned for given releases. The 6-month roadmaps that outlines focus areas of work can be viewed for ... See the 5.0 Iteration Plan for more details. ... See the 4.9 Iteration Plan for more details.
Author   microsoft
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Microsoft Developer Blogs
devblogs.microsoft.com › dev blogs › typescript › announcing typescript 4.9 beta
Announcing TypeScript 4.9 Beta - TypeScript
September 23, 2022 - Today we’re announcing our beta ... -D typescript@beta You can also get editor support by Downloading for Visual Studio 2022/2019 Following directions for ......
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Microsoft Developer Blogs
devblogs.microsoft.com › dev blogs › typescript › announcing typescript 4.9 rc
Announcing TypeScript 4.9 RC - TypeScript
November 1, 2022 - Nearer term, we’ll be releasing TypeScript 4.9 stable in the next few weeks – specifically, our target is around November 15th, 2022. To make sure we didn’t miss anything, we would appreciate it greatly if you tried TypeScript 4.9 RC out ...
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The Software House
tsh.io › blog › new-typescript-features
New Typescript features – what’s new in TypeScript?
As I am writing this article, the latest version we know anything about is TypeScript 5.0.4, released back in April 2023. Microsoft’s DevBlogs is another great resource when you want to stay up-to-date and get all the details.
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Twitter
twitter.com › leeerob › status › 1563540593003106306
Code example of upcoming TypeScript 4.9 changes ...
JavaScript is not available · We’ve detected that JavaScript is disabled in this browser. Please enable JavaScript or switch to a supported browser to continue using twitter.com. You can see a list of supported browsers in our Help Center · Help Center · Terms of Service Privacy Policy ...
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Better Programming
betterprogramming.pub › whats-new-in-typescript-4-9-6bce2387aa31
What’s New in TypeScript 4.9?
November 15, 2022 - The TypeScript 4.9 version is planned to be released on the 15th of November 🎉. It will be the last one of 2022. It has been been a great year for TypeScript. As usual, you can follow any of the…
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Devtalk
forum.devtalk.com › frontend developer forum › frontend official news
TypeScript v4.9.5 released! - Frontend Official News - Devtalk
November 17, 2022 - TypeScript v4.9.5 has been released. Link: Release TypeScript 4.9.5 · microsoft/TypeScript · GitHub
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GitHub
github.com › microsoft › TypeScript › issues › 51362
TypeScript 5.0 Iteration Plan · Issue #51362 · microsoft/TypeScript
September 11, 2022 - Date · Event · November 15th · TypeScript 4.9 Release · January 20th · Create 5.0 Beta (5.0.0) Build for Testing · January 24th · TypeScript 5.0 Beta Release · February 24th · Create 5.0 RC (5.0.1) Build for Testing · February 28th ...
Published   Oct 31, 2022
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Microsoft Developer Blogs
devblogs.microsoft.com › dev blogs › typescript › announcing typescript 5.9
Announcing TypeScript 5.9 - TypeScript
August 1, 2025 - 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.