tcomb-validation

tcomb-validation is a general-purpose JavaScript validation library built upon the tcomb type combinator library. It provides a concise yet expressive syntax for validating various data structures, including native types, refinements, objects, lists, tuples, enums, unions, dicts, and intersections, with arbitrary nesting levels. The library offers detailed information on failed validations, making it a lightweight alternative to JSON Schema for validating domain models. The current stable version is 3.4.1, with releases typically addressing bug fixes and minor features, often in conjunction with its `tcomb` dependency. A key differentiator is its direct reuse of `tcomb` type definitions for validation, streamlining development when `tcomb` is already used for runtime type checking or domain modeling. It ships with TypeScript definitions, ensuring good type safety for modern JavaScript and TypeScript projects.