Date | Event ---------------|------------------------- 2025-02-25 | TypeScript 5.8 Release 2025-05-23 | Create 5.9 Beta (5.9.0) Build for Testing 2025-05-26 | **TypeScript 5.9 Beta Release** 2025-06-13 | Create 5.9 RC (5.9.1) Build for Testing 2025-06-17 | **TypeScript 5.9 RC Release** 2025-07-18 | Create 5.9 Final (5.9.2) Build for Testing 2025-07-22 | **TypeScript 5.9 Final Release** 🚀 # Compiler and Language * [`tsc --init` Updates](https://github.com/microsoft/TypeScript/issues/58420) * 6.0 Deprecation Plans * Investigate Cyclic Project References * `node20` Resolution * [`lib.d.ts` Updates](https://github.com/microsoft/TypeScript/pull/61647) # Editor and Language Service * [Expandable Hovers](https://github.com/microsoft/TypeScript/pull/59940) # Performance * [Port to Native](https://github.com/microsoft/typescript-go) * [Cache Mapper Instantiations](https://github.com/microsoft/TypeScript/pull/61505)
