Related Lists

• lucasviola/Awesome Functional Programming
• Awesome FRP JS
• xgrommx/Awesome Functional Programming
• Functional Programming Resources In JavaScript

Talk

• Functional Programming Slack channel

Lenses

• TypeScript - TypeScript is a typed superset of JavaScript that compiles to plain JavaScript.
• Elm - safe functional programming language for declaratively creating web browser-based graphical user interfaces. Implemented in Haskell.
• Fable - Compiles [F#](http://fsharp.org) to readable JavaScript.
• PureScript
• Idris
• Js\_of\_ocaml
• Reason
• ReScript - lang.org/bucklescript-rebranding)) ReScript is a type-safe language that compiles to the highest quality of clean, readable and performant JavaScript code.
• Scala.js - lang.org/) to JavaScript.
• LiveScript
• Koka - oriented programming language that seperates pure values from side-effecting computations with a familiar JavaScript like syntax.
• Gleam - Gleam is a typed, functional language that compiles to Erlang and JavaScript.
• LiveScript
• ClojureScript
• GHCJS
• RacketScript
• RamdaScript - A Lisp that compiles to opinionated JavaScript on top of RamdaJS
• Js\_of\_ocaml
• Quack - A multi-paradigm programming language with gradual and duck typing that targets PHP and JS.
• ion - no BS JS
• Reason

Videos

• Anjana Vakil: Learning Functional Programming with JavaScript - JSUnconf 2016 - A simple and understandable introduction of functional proramming in javascript.
• Classroom Coding with Prof. Frisby
• Hey Underscore, You're Doing It Wrong!
• Functional programming patterns for the non-mathematician
• Pure JavaScript
• Functional programming in JavaScript - A series by Mattias Petter Johansson, from the youtube channel FunFunFunction, that is specifically about popularization of functional programming in JavaScript.
• Functional Programming in TypeScript - Discover functional programming with Typescript and create a library like fp-ts alongside Sahand Javid in this beginner-friendly YouTube playlist.
• Functional Programming Basics In ES6 - A complete introduction to functional programming in javascript made it easy by ES6.
• JavaScript Programmers Should Learn Algebraic Data Types -- May 2018 -- UtahJS Lehi - Seth House explains how ADTs (Algebraic Data Types) can be useful to JavaScript developers.
• Functional programming in JavaScript - A series by Mattias Petter Johansson, from the youtube channel FunFunFunction, that is specifically about popularization of functional programming in JavaScript.

Books

• JavaScript Allongé
• Functional Programming in JavaScript - free explanations, this book teaches you how to apply functional programming to real-life development tasks. By Luis Atencio (2016)
• Eloquent JavaScript
• Functional JavaScript
• Grokking Simplicity - world scenarios. By [Eric Normand](https://github.com/ericnormand) (2019)
• scriptum - a no-frills functional programming library and a online course based on it
• Functional-Light JavaScript
• Professor Frisby’s Mostly Adequate Guide to Functional Programming - world examples. Strongly recommended. By [Brian Lonsdorf](https://twitter.com/drboolean) (2016)
• Functional JavaScript

Articles

• FP Concepts in JavaScript
• Functional programming with JavaScript
• A gentle introduction to functional JavaScript - part series introduction functional programming in JavaScript that gets you up to speed what all the hype about functional programming is all about.
• Functors from first principle - explained with JS - Explaining functors concept using JavaScript.
• Favoring Curry - Practical applications of currying using Ramda.
• Functional Mumbo Jumbo – ADTs - friendly introduction to Algebraic Data Types.
• JavaScript and Type Thinking
• Lazy, composable, and modular JavaScript - of – in conjunction with higher-order functions, function composition, and lazy evaluation, to write cleaner and more modular JavaScript.
• Why Ramda
• Monads in JavaScript
• Functional programming
• Data Structures in JavaScript
• So You Want to be a Functional Programmer - Easy to understand, with some examples, introduction to Functional Programming in Javascript and Elm.
• Functional Programming for JavaScript People - A complete introduction to functional programming patterns by Chet Corcos with a lot of javascript examples.
• Introduction to Immutable.js and Functional Programming Concepts - Learn about functional data structures and their uses in this overview of Facebook's popular library for JavaScript: Immutable.js.
• Master the JavaScript Interview: What is Functional Programming? - A simple introduction by @ericelliott to functional principles and vocabulary.
• Composing Software - A series of articles on learning functional programming and compositional software techniques in JavaScript ES6+ from the ground up by @ericelliott.
• Anonymous Recursion in JavaScript - Short and easy to understand article about implementing anonymous recursion in JavaScript.
• Functional Composition in Javascript
• Functional Programming Principles in Javascript - Practical code examples to learn functional programming concepts like pure function, immutability, first-class entities, and higher order functions
• Basic Monads in Javascript - Introduction to 2 easy monads in Javascript, Maybe & Either.
• F# for JavaScript Devs - Showcasing the similarities between F# and JavaScript
• A practical guide to writing more functional Javascript - A step by step guide to convert imperative JavaScript to more declarative, functional JavaScript.
• Why Curry Helps
• Functional programming with JavaScript
• Functional Programming Jargon
• You don't (may not) need loops ➿ - Loops are one of the first constructs that junior programmers learn, but they can pose many potential issues in the software development process, and could be avoided in many cases.
• So You Want to be a Functional Programmer - Easy to understand, with some examples, introduction to Functional Programming in Javascript and Elm.
• Functional Mumbo Jumbo – ADTs - friendly introduction to Algebraic Data Types.
• A Monad in Practicality: First-Class Failures
• Functional Composition in Javascript
• Functional Programming Principles in Javascript - Practical code examples to learn functional programming concepts like pure function, immutability, first-class entities, and higher order functions

Examples and Exercises

• Hardcore Functional Programming in JavaScript - by-step with how to build an example web app using abstract interfaces like Monads, Functors, Monoids and Applicatives. (_commercial_)
• Learn Rx
• functional-frontend-architecture - type-js + Flyd + Snabbdom
• functional-javascript-workshop
• Escape from Callback Mountain - Design & refactoring tips for Promise-based Functional JavaScript. Key benefits include better readability, testability, and reusability. MIT.
• FPJS-Class
• cube-composer
• FP Youtube Search
• Learn Rx

• Folktale - 2020. -TS.
• lodash/fp - curried, iteratee-first, data-last methods. +TS.
• prelude.ls - TS.
• fp-dom
• Creed - minded async with advanced features: coroutines, promises, ES2015 iterables, fantasy-land. -TS.
• remeda - friendly. +TS.
• prelude.ls - TS.
• js-joda - driven and clean API based on the ISO8601 calendar.
• Ramda
• 101 - TS
• most - high performance reactive programming to help you compose asynchronous operations on streams of values and events without many of the hazards of side effects and mutable shared state.
• trifl
• 1-liners - crafted with love and attention. -TS.
• Ferrum - TS.
• futil-js - A collection of functional utilities that could conceivably be part of a library like lodash/fp, but for some reason or other are not.
• ts-pattern - The exhaustive Pattern Matching library for TypeScript, with smart type inference. Pattern Matching is a code-branching technique coming from FP languages.
• Rambda - A faster alternative to Ramda in under 10kB.
• fxts - Lazy evaluation and concurrency. +TS
• Ramda Adjunct - maintained extension of Ramda.
• react-on-lambda - Replace JSX in React with functions (currying, compositions and etc).
• rubico - 🏞 [a]synchronous functional syntax
• Rambdax - Extended version of Rambda
• iter-tools - a rich toolset for working with iterables, both sync and async. +TS.
• fp-ts - Typed functional programming in TypeScript. +CT, +TS.
• preludejs - Hardcore Functional Programming for JavaScript. -TS.
• Verticalize - Super lightweight function that looks and behaves like a pipe operator.
• true-myth - call style
• Ramda-extension - free functions composed only from Ramda functions.
• TGrid - Grid Computing Framework, Network & Thread extension of [TSTL](https://github.com/samchon/tstl), supporting RFC (Remote Function Call). +TS.
• compose-function
• fun-task
• fnuc
• zen-signals
• ts-fp-di - Tiny TypeScript functional dependency injection, based on Node.js AsyncLocalStorage. +TS
• funcy
• functionize - functional libraries functional.
• bluebird-promisell - A practical functional programming library for promises.
• ts-multimethod - TypeScript multimethods inspired by Clojure multimethods. +TS
• rocket-pipes - Powerful pipes, that chain Promise and ADT like Maybe or Either from popular FP libraries. +TS
• klubok - Pipes with easy mocking, intended for huge amount of unit tests. +TS
• context-fp - Microscopic functional programming context aka dependency injection. +TS
• RxEffects - Reactive state and effect management with RxJS. +TS
• Ditox.js - Powerful dependency injection container for building modular apps. +TS
• qio - safe, functional, performant, lawful, composable data structure that solves practical problems of effect-full code in node and browser. +TS
• lambdajs
• omg-curry - Comprehensive Curry Library with Operator Curry, Curry from functions, Decurry and Infifnite Curries.
• pico-lambda - Arrays, Strings and things the functional way. A 640b functional library based on native methods. -TS.
• fp-filters - A curated collection of 130+ common-use filter functions.
• effect-ts - fledged functional effect system for typescript with a rich standard library. +TS
• date-fp - fp are pure, autocurried and will not mutate the date objects they are applied to.
• barely-functional - TS.
• functional.js - free / tacit programming.
• fn-curry
• curry
• \_part\_
• FPO.js - argument style methods.
• fpEs - A small library provides simple usages of basic FP & pattern-matching/sumtype & MonadIO/Rx & Optional for Javascript. -TS.
• Creed - minded async with advanced features: coroutines, promises, ES2015 iterables, fantasy-land. -TS.
• lfi - A Lazy Functional Iteration Library Supporting Sync, Async, and Concurrent Iteration.
• hyogwa - Natural 🌿 effect system that fits TypeScript; Write codes as you write **plain typescript code**.
• PureEval - A powerful JavaScript functional programming toolset, including utility functions and abstract data structures.
• ts-belt - Fast, modern, and practical utility library for FP in TypeScript. (Uses a data-first approach like remeda, but is [faster](https://mobily.github.io/ts-belt/benchmarks/v3.7.0/macbook-air-2020) than remeda, ramda, rambda, and lodash/fp.)

Algebraic Data Types

• Fantasy Land
• crocks - TS.
• purify - Functional programming library for TypeScript focusing on ADTs. +CT, +TS.
• NeverThrow - This package contains a `Result` type that represents either success (`Ok`) or failure (`Err`).
• immutable-ext - js).
• Pratica - Small, simple, easy FP data types for pragmatic and productive developers who need to ship reliable code fast. +CT, +TS.
• union-type
• monet.js
• freeky
• fantasy-combinators
• fantasy-birds
• kudo-js - A small utility library with a set of Algebraic Data Types and Helper functions to help you write code in a functional programming style in Javascript
• MojiScript - an async-first, opinionated, and functional language designed to have 100% compatibility with JavaScript engines
• sweet-monads - A collection of popular monads (such as `Either` and `Maybe`) and the lazy iterator.

Lenses

• ramda-lens
• partial.lenses - performance optics library for JavaScript.
• shades - inspired lens-like library for Javascript.
• nanoscope
• lenses
• optics
• fantasy-lenses

Data Structures

• Baobab
• Lazy.js
• collectable - performance immutable data structures for modern JavaScript and TypeScript applications. +TS.
• List - An extremely fast immutable list with a comprehensive functional API. Designed to [seamlessly integrate with Ramda](https://github.com/funkia/list#seamless-ramda-integration).
• Mori
• Icepick
• TSTL - C++ STL (Standard Template Library) is implemented in TypeScript. STL Containers, iterators, algorithms and functors, that following functional programming rule, are provided. +TS.
• DerivableJS
• immutable-sequence.js
• imlazy
• Immutable.js
• Immer - on-write mechanism. +TS.
• Timm
• prelude.ts - Immutable persistent collections, functional constructs such as Option and Either, and combinators. Implemented in Typescript but supports javascript too. +CT, +TS.

Lenses

• eslint-plugin-fp - ESLint rules for functional programming
• hm-def
• 4.5 - oriented assertions that are lazy and monadic.