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TypeScript 0.9.0 Alpha and Beta

Rating:        Based on 6 ratings
Reviewed:  6 reviews
Downloads: 7419
Released: Jun 6, 2013
Updated: Jun 6, 2013 by jonturner
Dev status: Alpha Help Icon

Recommended Download

Application 0.9.0 beta (6/6/2013)
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Other Available Downloads

Application 0.9.0 alpha (4/22/2013)
application, 5468K, uploaded Apr 22, 2013 - 2693 downloads
Documentation TypeScript Language Specification.docx
documentation, 263K, uploaded Jun 2, 2013 - 354 downloads
Documentation TypeScript Language Specification.pdf
documentation, 1098K, uploaded Jun 2, 2013 - 778 downloads

Release Notes

This is as early preview alpha of the 0.9.0 series. It is not recommended to users looking for stable builds. For stable builds, it is recommended users wait until the 0.9.0 release.

For more information, see the blog post ( on the early previews.

Reviews for this release

i'm writing an angular+require+karma app, and ported it to 0.9.0 with very minor difficulties. big problem with performance however, very unreliable (unusable) with projects that span multiple files and reference multiple .d.ts files
by novaleaf on Jun 7, 2013 at 4:58 AM
Great to see generics, but please make compile time fast again and make the Visual Studio Plugin work better
by TobiasHei on May 15, 2013 at 3:05 PM
Typescript 0.8 was great and the new version is even better. I honestly believe that this language is just what the web needs: an improved javascript with traditional oop and type annotations. The fantastic tools allow for great productivity. Forget dart and coffeescript, this is the way to go.
by lhk on May 15, 2013 at 8:07 AM
So far, I love the generics system. Despite difficulties in finding solutions to my problems, despite support for generics in static methods, or constraints (to my knowledge), and even with the known compiler problems, it's still fun to develop in.
by DRubino on May 8, 2013 at 4:25 AM
So excited to be able to try out generics!
by Sohnee on Apr 22, 2013 at 6:29 PM
Generics are awesome. It's already helping me clean up so much nasty code. I haven't run into a lot of compile-time bugs, but there are still a lot - a LOT - of design-time bugs in the Visual Studio language service. And compilation is still at least an order of magnitude slower than it was with 0.8.3.
by smithkl42 on Jun 3, 2013 at 6:05 PM