type-plus

Type utility library providing over 100 advanced TypeScript types for type-level programming. Current stable version is 7.6.2, released on npm with a moderate release cadence. It offers a wide range of type utilities such as numeric operations, object manipulation, array utilities, logical types, and assertion helpers. Key differentiators include a comprehensive set of type-level functions, support for advanced types like `$Equal`, `$Exact`, `Distributive`, and `AdjustExactOptionalProps`, along with built-in support for ESM and CJS. The library is actively maintained with a beta for v8.0.0 introducing breaking changes like renaming of types and ESM-only mode.