Updating TypeScript version support in AWS SDK for JavaScript v3

Takes effect

4 Jan 2027

Earlier phase

24 Sept 2026

Published

4 Oct 2026

We’re updating TypeScript version support in the AWS SDK for JavaScript v3 . Starting January 4, 2027, the SDK will require TypeScript versions published within the last 2.5 years. Read on to learn what’s changing, why this change is necessary, and what actions you may need to take. We built the AWS SDK for JavaScript with TypeScript-first development in mind, designed to deliver smaller artifacts while taking advantage of modern TypeScript features. This support policy update also aligns the SDK with the broader TypeScript ecosystem. What’s changing and why This change applies only if you use TypeScript with the AWS SDK for JavaScript v3. The TypeScript ecosystem has broadly converged on supporting only recent compiler versions: DefinitelyTyped , the central repository for community-maintained TypeScript type definitions (hosting types for 8,000+ npm packages including @types/node and @types/react ), only tests packages against TypeScript versions less than 2 years old. For more

Read the vendor's announcement