Inspired by

• PureScript
• fantasy-land
• static-land
• Scala

To install the stable version:

npm install --save fp-ts

The stable version is tested against TypeScript 2.6.x, but should run with TypeScript 2.2.2+ too

The shadow files are tested against 0.59.0

The idea (faking higher kinded types in TypeScript) is based on

• Lightweight higher-kinded polymorphism
• elm-brands
• Higher kinded types in TypeScript, static and fantasy land
• flow-static-land

• io-ts - TypeScript compatible runtime type system for IO validation
• monocle-ts - Functional optics: a (partial) porting of scala monocle to TypeScript
• newtype-ts - Implementation of newtypes in TypeScript
• logging-ts - Composable loggers for TypeScript
• fp-ts-routing - A type-safe bidirectional routing library for TypeScript
• parser-ts - String parser combinators for TypeScript

• fp-ts-rxjs - fp-ts bindings for RxJS
• fp-ts-fluture - fp-ts bindings for Fluture

• API
• How HKT, URI2HKT, HKTS and HKTAs work
• Examples
  • Free monad
  • MTL-style
  • OptionT monad transformer
  • EitherT monad transformer
  • StateT monad transformer
  • ReaderT monad transformer
  • Applicative composition
  • Type safe finite state machines with IxIO
  • Moore machine
  • Debugging with Trace
• fantas-eel-and-specification - Code for the Fantas, Eel, and Specification blog series on functional programming by Tom Harding

The MIT License (MIT)