pure-parse
Strongly typed validation library that decouples type aliases from validation logic
salt
State And Logic Traversal, for today's infinite-application.
match-rules
A tiny (1kB GZipped) zero dependency JavaScript utility that lets you write your conditional business logic in a declarative way (React like).
condition-switch
A powerful and flexible TypeScript utility for writing clean, declarative, and expressive conditional logic. It's a great replacement for if/else and switch statements in functional components, arrow functions, and other expression-based scenarios.