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fp-ts

The fp-ts is a powerful library that brings functional programming concepts to TypeScript development. It provides a set of functional programming abstractions and utilities for building robust and type-safe applications. Leveraging algebraic data types, type classes, and immutable data structures, fp-ts enables developers to write functional, expressive, and statically-typed code in TypeScript.

Use cases​

  • Error Handling: Replace error-prone checks and exceptions with structured error handling using Either and Option.
  • Asynchronous Programming: Manage asynchronous operations using Task and TaskEither monads in a composable and predictable way.
  • Expressive Business Logic: Simplify and clarify core application logic using functional abstractions like function composition and pipe.
  • Pure Side Effect: Represent side effects with the IO monad to keep the code pure and free of hidden side effect.
  • Dependency Injection: Manage connections between different parts of the code with the Reader monad, promoting modularity and testability.

Reference of usage in our organization​

There are many projects using fp-ts.

Resources​