node-machine/rttc

# RTTC Runtime type-checking for JavaScript. This package provides a lightweight type system for JavaScript that allows developers to add type guarantees to their code on an as-needed basis without requiring changes to their development stack or build tools. It builds on existing JavaScript data structures and concepts to validate and coerce data at runtime, making it particularly useful for team development where data type mismatches can lead to errors. The system includes methods for validation, coercion, and type inference, supporting 10 different data types including strings, numbers, booleans, functions, dictionaries, arrays, and more. It's designed to work recursively, allowing deep traversal of nested objects and arrays while providing sensible default values when coercion fails.