Impact Score: 5/10
TypeScript 4.9.5
Source available — automated, not human-reviewed
Component: typescript · Channel: stable. Automated analysis, not a compatibility certification. How this works.
Analysis updated: 2026-11-01.
⚡ Executive Summary (TL;DR)
TypeScript v4.9.5. 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.
🔧 Bug Fixes & Patches (1)
- daf4e817a18def96b70ac34703b158ff0e6d58df Port timestamp fix to 4.9 (#52426)
📄 View Raw Release Notes (Original Developer Log)
For release notes, check out the [release announcement](https://devblogs.microsoft.com/typescript/announcing-typescript-4-9/).
Downloads are available on:
* [npm](https://www.npmjs.com/package/typescript)
* [NuGet package](https://www.nuget.org/packages/Microsoft.TypeScript.MSBuild)
## Changes:
* 69e88ef5513a81acf69ec78f4af1f927da0d0584 Port ignore deprecations to 4.9 (#52419)
* daf4e817a18def96b70ac34703b158ff0e6d58df Port timestamp fix to 4.9 (#52426)