Sanctuary-type-classes provides JavaScript versions of Haskell's standard type classes, such as Functor, Applicative, and Monad. It allows developers to write polymorphic functions that operate on various data types conforming to these interfaces. This package promotes code reuse and abstraction by enabling operations to be defined generically across different data structures like Maybe, Either, and lists, provided they implement the necessary type class methods. Its goal is to bring functional programming principles and type safety to JavaScript development.
