⚠️ Breaking Change
Impact Score: 7/10
TypeScript 2.6
Source available — automated, not human-reviewed
Component: typescript · Channel: stable. Automated analysis, not a compatibility certification. How this works.
Analysis updated: 2026-11-01.
Breaking-change evidence from the source
For breaking changes, check out the [Breaking changes in TypeScript 2.6](https://github.com/Microsoft/TypeScript/wiki/Breaking-Changes#typescript-26) page.
For API breaking changes, check out the [API Breaking changes in TypeScript 2.6](https://github.com/Microsoft/TypeScript/wiki/API-Breaking-Changes#typescript-26) page.
⚡ Executive Summary (TL;DR)
TypeScript v2.6.1. Source highlight: For release notes, check out the release announcement
Who Does This Impact? (Role-Based Analysis)
💻 Software Engineers & Devs
Check the source notes against the package and APIs you use before upgrading.
📊 Product & Engineering Leads
Use the documented changes to assess relevance to your product; release frequency alone is not a quality measure.
⚙️ DevOps & Security
Verify the target version, runtime requirements and rollback procedure in the official documentation.
⚠️ Breaking Changes & Deprecations (2)
- For breaking changes, check out the [Breaking changes in TypeScript 2.6](https://github.com/Microsoft/TypeScript/wiki/Breaking-Changes#typescript-26) page.
- For API breaking changes, check out the [API Breaking changes in TypeScript 2.6](https://github.com/Microsoft/TypeScript/wiki/API-Breaking-Changes#typescript-26) page.
📄 View Raw Release Notes (Original Developer Log)
For release notes, check out the [release announcement](https://blogs.msdn.microsoft.com/typescript/2017/10/31/announcing-typescript-2-6/)
For new features, check out the [What's new in TypeScript 2.6](https://github.com/Microsoft/TypeScript/wiki/What's-new-in-TypeScript#typescript-26).
For breaking changes, check out the [Breaking changes in TypeScript 2.6](https://github.com/Microsoft/TypeScript/wiki/Breaking-Changes#typescript-26) page.
For API breaking changes, check out the [API Breaking changes in TypeScript 2.6](https://github.com/Microsoft/TypeScript/wiki/API-Breaking-Changes#typescript-26) page.
For the complete list of fixed issues, check out the issues fixed in [TypeScript 2.6 RC](https://github.com/Microsoft/TypeScript/issues?q=is%3Aissue+milestone%3A%22TypeScript+2.6%22+label%3A%22fixed%22+) and [after TypeScript 2.6 RC](https://github.com/Microsoft/TypeScript/issues?q=is%3Aissue+milestone%3A%22TypeScript+2.6.1%22+label%3A%22fixed%22+).
Download:
- [npm](https://www.npmjs.com/package/typescript)
- [Visual Studio 2015 plugin](https://www.microsoft.com/en-us/download/details.aspx?id=48593)
- [Visual Studio 2017](https://www.microsoft.com/en-us/download/details.aspx?id=55258) ([Select new version in project options](https://github.com/Microsoft/TypeScript/wiki/Updating-TypeScript-in-Visual-Studio-2017))
- [NuGet package](https://www.nuget.org/packages/Microsoft.TypeScript.MSBuild/2.6.1)
Special thanks to all contributors to this release:
* Adrian Leonhard
* Alex Chugaev
* Alex Eagle
* Anders Hejlsberg
* Andrew Casey
* Andy Hanson
* Armando Aguirre
* Arthur Ozga
* Basarat Ali Syed
* Benjamin Lichtman
* Charles Pierce
* Daniel Rosenwasser
* @falsandtru
* Filipe Silva
* Francois Wouts
* Henry Mercer
* Herrington Darkholme
* Ivan Enderlin
* Joe Calzaretta
* Klaus Meinhardt
* Magnus Kulke
* Matt Bierner
* Matt Mitchell
* Mohamed Hegazy
* Nathan Shively-Sanders
* Paul van Brenk
* Ron Buckton
* Ryan Cavanaugh
* Sheetal Nandi
* Stas Vilchik
* Taras Mankovski
* Thomas den Hollander
* Vakhurin Sergey
* Wesley Wigham
* Zeeshan Ahmed
* Zev Spitz