Release Info
- Version
- 5.9
- Release Date
- May 20, 2026
- Status
- Stable
- Maintainer
- Microsoft
- Platform
- Any JavaScript runtime
- License
- Apache-2.0
TypeScript adds static types to JavaScript, catching errors at build time and powering editor features like autocomplete, refactors, and inline documentation.
npm install --save-dev typescriptTypeScript 5.9 continues the push toward faster type-checking on large codebases, refines decorator support to match the finalized ECMAScript proposal, and improves inference for common generic patterns.
