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:sunglasses: A curated list of awesome functional programming stuff in js

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[ Daily / Weekly / Overview ]

Feb 17, 2024

Libraries

• PureEval (⭐27) - A powerful JavaScript functional programming toolset, including utility functions and abstract data structures.

• context-fp (⭐1) - Microscopic functional programming context aka dependency injection. +TS

Oct 17, 2023

Libraries

• Verticalize (⭐299) - Super lightweight function that looks and behaves like a pipe operator.

Sep 18, 2023

Libraries / Algebraic Data Types

• sweet-monads (⭐294) - A collection of popular monads (such as Either and Maybe) and the lazy iterator.

Sep 04, 2023

Libraries

• hyogwa (⭐45) - Natural 🌿 effect system that fits TypeScript; Write codes as you write plain typescript code.

Mar 19, 2023

Resources / Videos

• 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.

Oct 14, 2022

Libraries

• ts-pattern (⭐10k) - The exhaustive Pattern Matching library for TypeScript, with smart type inference. Pattern Matching is a code-branching technique coming from FP languages.

Libraries / Data Structures

• List (⭐1.6k) - An extremely fast immutable list with a comprehensive functional API. Designed to seamlessly integrate with Ramda (⭐1.6k).

Sep 15, 2022

Community / Talk

• Functional Programming Slack channel – Community with a friendly channel for JavaScript as well as many other channels about functional programming in general.

Jun 09, 2022

Libraries

• true-myth (⭐818) A library for safe, idiomatic null and error handling in TypeScript, with Maybe and Result types, supporting both a functional style and a more traditional method-call style

Apr 24, 2022

Libraries

• fp-multik (⭐6) - JS/TS lightweight value-multimethod util

Apr 20, 2022

Libraries

• functional.js (⭐220) – A lightweight functional JavaScript library that facilitates currying and point-free / tacit programming.

Feb 08, 2022

Libraries

• ts-belt - Fast, modern, and practical utility library for FP in TypeScript. (Uses a data-first approach like remeda, but is faster than remeda, ramda, rambda, and lodash/fp.)

Dec 06, 2021

Libraries

• fxts (⭐689) - Lazy evaluation and concurrency. +TS

Oct 31, 2021

Libraries

• Ditox.js (⭐79) - Powerful dependency injection container for building modular apps. +TS

• RxEffects (⭐34) - Reactive state and effect management with RxJS. +TS

Oct 16, 2021

Libraries

• effect-ts (⭐3.4k) – A Fully-fledged functional effect system for typescript with a rich standard library. +TS

• qio (⭐69) – A type-safe, functional, performant, lawful, composable data structure that solves practical problems of effect-full code in node and browser. +TS

Oct 11, 2021

Functional Languages that Compile to JavaScript / Lenses

• Gleam - Gleam is a typed, functional language that compiles to Erlang and JavaScript.

Oct 09, 2021

Libraries

• ts-multimethod (⭐4) - TypeScript multimethods inspired by Clojure multimethods. +TS

• ts-fp-di (⭐2) - Tiny TypeScript functional dependency injection, based on Node.js AsyncLocalStorage. +TS

Sep 14, 2021

Libraries

• lfi (⭐232) - A Lazy Functional Iteration Library Supporting Sync, Async, and Concurrent Iteration.

Dec 20, 2020

Functional Languages that Compile to JavaScript / Lenses

• ReScript – (previously known as Bucklescript) ReScript is a type-safe language that compiles to the highest quality of clean, readable and performant JavaScript code.

Oct 03, 2020

Libraries

• Rambdax (⭐215) - Extended version of Rambda

Aug 27, 2020

Libraries

• omg-curry (⭐135) - Comprehensive Curry Library with Operator Curry, Curry from functions, Decurry and Infifnite Curries.

Jul 03, 2020

Libraries

• rocket-pipes (⭐23) - Powerful pipes, that chain Promise and ADT like Maybe or Either from popular FP libraries. +TS

May 30, 2020

Libraries

• rubico (⭐262) - 🏞 [a]synchronous functional syntax

May 26, 2020

Resources / Books

• scriptum (⭐380) - a no-frills functional programming library and a online course based on it

Mar 29, 2020

Libraries

• fp-ts - Typed functional programming in TypeScript. +CT, +TS.

Mar 11, 2020

Libraries

• futil-js (⭐933) - A collection of functional utilities that could conceivably be part of a library like lodash/fp, but for some reason or other are not.

Feb 13, 2020

Resources / Articles

• You don't (may not) need loops ➿ (⭐1.1k) - 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.

Nov 19, 2019

Libraries

• Ramda (⭐23k) – A practical functional library for JavaScript that is designed specifically for a functional programming style. A style that makes it easy to create functional pipelines and never mutates user data. +TS.

• Folktale – A standard library for functional programming in JavaScript. Typescript support expected mid-2020. -TS.

• lodash/fp (⭐58k) – An instance of Lodash (⭐58k) with its methods wrapped to produce immutable, auto-curried, iteratee-first, data-last methods. +TS.

• 101 (⭐1.6k) – A modern and modular JavaScript utility library made to work well with vanilla JavaScript methods. -TS

• barely-functional (⭐104) – A tiny (2.7kb) functional programming library using native ES5/6 operations. -TS.

• prelude.ls – A functionally oriented utility library somewhat based off of Haskell's Prelude module. -TS.

• preludejs (⭐97) - Hardcore Functional Programming for JavaScript. -TS.

• 1-liners (⭐789) – Functional tools that couldn’t be simpler. A dead simple functional utility belt, hand-crafted with love and attention. -TS.

• funfix (⭐632) – Funfix is a library of type classes and data types for Functional Programming in JavaScript, TypeScript and Flow. +CT, +TS.

• pico-lambda (⭐72) - Arrays, Strings and things the functional way. A 640b functional library based on native methods. -TS.

• pareto-js (⭐264) - An extremely small, intuitive and fast functional utility library for JavaScript -TS.

• fpEs (⭐41) - A small library provides simple usages of basic FP & pattern-matching/sumtype & MonadIO/Rx & Optional for Javascript. -TS.

• Creed – Sophisticated and functionally-minded async with advanced features: coroutines, promises, ES2015 iterables, fantasy-land. -TS.

• TGrid (⭐117) - Grid Computing Framework, Network & Thread extension of TSTL (⭐573), supporting RFC (Remote Function Call). +TS.

• Ferrum (⭐507) – Iterator library with support for objects as iterables, lazy evaulation andpipe(); implements Traits (from Rust)/Type Classes (from Haskell) in JS. -TS.

• iter-tools (⭐162) - a rich toolset for working with iterables, both sync and async. +TS.

• remeda A function library roughly subsetting Ramda, but written in Typescript and thus more type-friendly. +TS.

Libraries / Data Structures

• Immer (⭐27k) – Immer is a tiny package for immutable state based on copy-on-write mechanism. +TS.

• DerivableJS (⭐514) – Functional Reactive State for JavaScript and TypeScript. DerivableJS enables you to make elegant declarative statements about how your bits of state are related. +TS.

• collectable (⭐269) – Super high-performance immutable data structures for modern JavaScript and TypeScript applications. +TS.

• prelude.ts (⭐375) - Immutable persistent collections, functional constructs such as Option and Either, and combinators. Implemented in Typescript but supports javascript too. +CT, +TS.

• TSTL (⭐573) - C++ STL (Standard Template Library) is implemented in TypeScript. STL Containers, iterators, algorithms and functors, that following functional programming rule, are provided. +TS.

Libraries / Algebraic Data Types

• Sanctuary (⭐3k) – Sanctuary makes it possible to write safe code without null checks. +CT, +TS.

• monet.js – A library that assists functional programming by providing a rich set of Monads and other useful functions. +CT, +TS.

• crocks (⭐1.6k) – A collection of popular Algebraic Data Types with the main goal to curate and provide not only a common interface between each type, but also all of the helper functions needed to hit the ground running. -TS.

• purify (⭐1.5k) - Functional programming library for TypeScript focusing on ADTs. +CT, +TS.

• Pratica (⭐433) - Small, simple, easy FP data types for pragmatic and productive developers who need to ship reliable code fast. +CT, +TS.

• Tifi - Tifi is a library for functional programming in TypeScript. It solves a problem of the existence of both undefined and null. Tifi is inspired by the OCaml/Reason utilities for the option data type. +CT, +TS.

Oct 30, 2019

Functional Languages that Compile to JavaScript / Lenses

• TypeScript - TypeScript is a typed superset of JavaScript that compiles to plain JavaScript.

Aug 21, 2019

Resources / Books

• Grokking Simplicity teaches functional programming from first principles. It uses JavaScript for all code examples and it uses real-world scenarios. By Eric Normand (2019)

Aug 17, 2019

Resources / Articles

• Functors from first principle - explained with JS - Explaining functors concept using JavaScript.

Jun 21, 2019

Resources / Articles

• A practical guide to writing more functional Javascript - A step by step guide to convert imperative JavaScript to more declarative, functional JavaScript.

May 07, 2019

Resources / Examples and Exercises

• Holdem Evaluator - Yet another Holdem Evaluator with Ramda functional style

Mar 21, 2019

Libraries

• react-on-lambda (⭐260) - Replace JSX in React with functions (currying, compositions and etc).

Mar 18, 2019

Resources / Articles

• F# for JavaScript Devs - Showcasing the similarities between F# and JavaScript

Feb 15, 2019

Resources / Articles

• Basic Monads in Javascript - Introduction to 2 easy monads in Javascript, Maybe & Either.

Jan 20, 2019

Resources / Articles

• Functional Programming Principles in Javascript - Practical code examples to learn functional programming concepts like pure function, immutability, first-class entities, and higher order functions

Community / Related Lists

• tk-learning-center/Functional Programming Learning Path (⭐966) - A Learning Path for Functional Programming

Oct 29, 2018

Resources / Articles

• Functional Composition in Javascript – Step by step explanation of how to compose functions in javascript.

Oct 13, 2018

Libraries / Lenses

• shades (⭐411) – A lodash-inspired lens-like library for Javascript.

Functional Languages that Compile to JavaScript / Lenses

• Koka – Koka is a function-oriented programming language that seperates pure values from side-effecting computations with a familiar JavaScript like syntax.

Oct 01, 2018

Libraries / Algebraic Data Types

• MojiScript (⭐149)- an async-first, opinionated, and functional language designed to have 100% compatibility with JavaScript engines

Aug 23, 2018

Resources / Videos

• 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.

Aug 20, 2018

Libraries

• Rambda (⭐1.6k) - A faster alternative to Ramda in under 10kB.

Jul 24, 2018

Resources / Articles

• Anonymous Recursion in JavaScript - Short and easy to understand article about implementing anonymous recursion in JavaScript.

Jul 18, 2018

Functional Languages that Compile to JavaScript / Lenses

• RacketScript (⭐12) – RacketScript aims to leverage both JavaScript and Racket's ecosystem, and make interoperability between them clean and smooth.

Apr 01, 2018

Libraries

• Ramda-extension (⭐164) is set of utility point-free functions composed only from Ramda functions.

Mar 23, 2018

Libraries / Algebraic Data Types

• kudo-js (⭐23) - 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

Feb 22, 2018

Functional Languages that Compile to JavaScript / Lenses

• Reason – Reason is a new interface to OCaml, a highly expressive dialect of the ML language featuring type inference and static type checking.

Jan 26, 2018

Libraries

• Ramda Adjunct (⭐679) is a community-maintained extension of Ramda.

Resources / Articles

• Master the JavaScript Interview: What is Functional Programming? - A simple introduction by @ericelliott to functional principles and vocabulary.

Jan 13, 2018

Programming Tools / Lenses

• ftor (⭐44) - A pluggable runtime type checker and functional debugging tool that supports parametric and row polymorphism, implicit rank-2 types and algebraic data types via Scott Encoding.

Oct 31, 2017

Resources / Videos

• Functional Programming Basics In ES6 - A complete introduction to functional programming in javascript made it easy by ES6.

Oct 15, 2017

Resources / Examples and Exercises

• Learn Rx – A series of interactive exercises introducing five basic ingredients of functional (reactive) programming: the map, filter, concatAll, reduce, and zip functions.

Aug 23, 2017

Functional Languages that Compile to JavaScript / Lenses

• RamdaScript (⭐132) - A Lisp that compiles to opinionated JavaScript on top of RamdaJS

Jul 28, 2017

Libraries

• zen-signals (⭐51) – ☯ The simplest signal library possible

Functional Languages that Compile to JavaScript / Lenses

• ion (⭐80) - no BS JS

Jun 07, 2017

Libraries

• Javascript Parser Combinator (⭐139) – Javascript parser combinator implementation inspired by the Haskell's Parsec

• fun-task (⭐372) – An abstraction for managing asynchronous code in JS. Tasks are similar to Promises with the key difference that Tasks can represent a computation while Promises can represent only the results of a computation. Ships with Flow type definitions.

• most (⭐3.5k) – Ultra-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.

Programming Tools / Lenses

• 4.5 (⭐21) – A functional assertions library. If you prefer functional style APIs and practices in JavaScript, this library aims to solve this with functionally-oriented assertions that are lazy and monadic.

• hm-def (⭐196) – Runtime type checking for JS with Hindley Milner signatures.

Jun 05, 2017

Functional Languages that Compile to JavaScript / Lenses

• Fable - Compiles F# to readable JavaScript.

May 11, 2017

Resources / Examples and Exercises

• Escape from Callback Mountain (⭐259) - Design & refactoring tips for Promise-based Functional JavaScript. Key benefits include better readability, testability, and reusability. MIT.

Apr 11, 2017

Resources / Articles

• Lazy, composable, and modular JavaScript – Use four new features of ES6 – iterables, generators, fat arrows, and for-of – in conjunction with higher-order functions, function composition, and lazy evaluation, to write cleaner and more modular JavaScript.

Mar 23, 2017

Resources / Articles

• Composing Software - A series of articles on learning functional programming and compositional software techniques in JavaScript ES6+ from the ground up by @ericelliott.

Mar 13, 2017

Libraries

• FPO.js (⭐449) – FP library for JavaScript by Kyle Simpson (aka getify). Supports named-argument style methods.

Mar 06, 2017

Libraries / Data Structures

• Baobab (⭐3.1k) – persistent and optionally immutable data tree with cursors.

Jan 24, 2017

Libraries / Lenses

• partial.lenses (⭐905) – Partial lenses is a comprehensive, high-performance optics library for JavaScript.

Jan 10, 2017

Resources / Articles

• 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.

Dec 31, 2016

Libraries

• bluebird-promisell (⭐44) - A practical functional programming library for promises.

Dec 20, 2016

Resources / Videos

• Anjana Vakil: Learning Functional Programming with JavaScript - JSUnconf 2016 - A simple and understandable introduction of functional proramming in javascript.

Dec 10, 2016

Programming Tools / Lenses

• eslint-plugin-fp (⭐969) - ESLint rules for functional programming

Nov 02, 2016

Resources / Articles

• Functional Programming for JavaScript People - A complete introduction to functional programming patterns by Chet Corcos with a lot of javascript examples.

Nov 01, 2016

Resources / Videos

• 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.

Oct 11, 2016

Functional Languages that Compile to JavaScript / Lenses

• Quack (⭐322) - A multi-paradigm programming language with gradual and duck typing that targets PHP and JS.

Oct 08, 2016

Libraries / Data Structures

• Icepick (⭐419) Utilities for treating frozen JavaScript objects as persistent immutable collections

Oct 03, 2016

Resources / Articles

• So You Want to be a Functional Programmer - Easy to understand, with some examples, introduction to Functional Programming in Javascript and Elm.

Sep 04, 2016

Libraries / Data Structures

• imlazy (⭐102) – Library for creating and manipulating lazy iterables using the ES2015 iteration protocols.

Aug 22, 2016

Libraries

• js-joda (⭐1.6k) – An immutable date and time library that provides a simple, domain-driven and clean API based on the ISO8601 calendar.

Resources / Books

• Functional-Light JavaScript (⭐16k) – This book explores the core principles of functional programming (FP) that can be applied to JavaScript. But what makes this book different is that it approaches these principles without all the heavy terminology.

Aug 20, 2016

Libraries / Algebraic Data Types

• Fantasy Land (⭐10k) – Not a library, but a specification of the Monad laws for libraries to follow.

• Static Land (⭐764) – Specification similar to Fantasy Land but based on static methods rather than instance methods.

Jun 29, 2016

Resources / Articles

• Functional Mumbo Jumbo – ADTs – A beginner-friendly introduction to Algebraic Data Types.

May 15, 2016

Libraries / Algebraic Data Types

• immutable-ext (⭐492) – FantasyLand extensions for Immutable.js (⭐33k).

Resources / Articles

• Monads in JavaScript – An introduction to the Monad design pattern in JavaScript.

• Data Structures in JavaScript – A series of blog posts that reimplements various data structures in JavaScript to better understand their benefits and downsides.

May 09, 2016

Resources / Books

• Professor Frisby’s Mostly Adequate Guide to Functional Programming (⭐23k) – This is a book on the functional paradigm in general using the world’s most popular functional programming language: JavaScript. It’s a practical introduction that builds up intuition through real-world examples. Strongly recommended. By Brian Lonsdorf (2016)

• JavaScript Allongé, the “Six” edition. Starts with as little as possible about functions – but no less! – and builds up towards powerful combinators and decorators. A foundational book. By Reginald Braithwaite (2016)

• Functional Programming in JavaScript teaches JavaScript developers functional techniques that will improve extensibility, modularity, reusability, testability, and performance. Through concrete examples and jargon-free explanations, this book teaches you how to apply functional programming to real-life development tasks. By Luis Atencio (2016)

• Eloquent JavaScript. A modern introduction to programming using JavaScript. By Marijn Haverbeke (2014)

• Functional JavaScript teaches how to create code that’s beautiful, safe, and simple to understand and test by using JavaScript’s functional programming support. By Michael Fogus (2013)

Resources / Articles

• FP Concepts in JavaScript – An introduction to Functional Programming Concepts in JavaScript. Uses the Ramda library to teach the concepts of composition, pointfree style, and functors through the simplest of examples.

• Functional programming with JavaScript – Another introduction to Functional Programming in JavaScript with a focus on three key themes: computation as the application of functions, statelessness, avoiding side effects.

• A gentle introduction to functional JavaScript – A four-part series introduction functional programming in JavaScript that gets you up to speed what all the hype about functional programming is all about.

• Why Curry Helps – A short overview of how to write reusable and declarative code using currying.

• Favoring Curry - Practical applications of currying using Ramda.

• JavaScript and Type Thinking – Learn to reason about your JavaScript code with type thinking. Algebraic Data Types are introduced as a conceptual basis to reason about program entities.

• Why Ramda – To those not used to functional programming, Ramda seems to serve no purpose whatsoever. However, it does offer a different style of coding, a style that’s taken for granted in purely functional programming languages: Ramda makes it simple for you to build complex logic through functional composition.

• A Monad in Practicality: First-Class Failures – A walk through some practical use cases for specific monadic structures in JavaScript: use the Maybe monad to handle simple failure cases and model more complex scenarios with the Either monad or the Validation applicative functor.

Resources / Videos

• Functional programming patterns for the non-mathematician – Learn about practical use cases for functors, applicatives, and monads.

• Pure JavaScript – Christian Johansen will show you how you can significantly up your game by leaving loops behind and embracing functions as the primary unit of abstraction.

Resources / Examples and Exercises

• FPJS-Class (⭐94) – Functional Programming learned through JavaScript.

• functional-javascript-workshop (⭐2k) – The goal of this workshop is to create realistic problems that can be solved using terse, vanilla, idiomatic JavaScript to teach fundamental functional programming features of JavaScript.

Apr 18, 2016

Libraries

• fn-curry (⭐5) – A simple function to curry a function.

• date-fp (⭐122) – A functional utility library for working with JavaScript dates. All functions in date-fp are pure, autocurried and will not mutate the date objects they are applied to.

Mar 14, 2016

Libraries / Algebraic Data Types

• Fluture (⭐2.5k) – A Future library with included control utilities, high performance and great error messages.

Community / Related Lists

• lucasviola/Awesome Functional Programming (⭐924) – Awesome resources on functional programming theory and learning materials.

• xgrommx/Awesome Functional Programming (⭐3.4k) – A ton of articles on functional programming, as well as a huge list of functional libraries for many programming languages.

Mar 13, 2016

Libraries

• fnuc (⭐15) – A functional library for CoffeeScript (and JavaScript) to facilitate functional composition and higher order functions.

• curry (⭐85) – Curry your functions using function bind syntax.

• compose-function (⭐57) – Compose a new function from smaller functions.

• functionize (⭐50) – A collection of functions which aid in making non-functional libraries functional.

• lambdajs (⭐143) – The full ECMAScript API done a functional way.

• fp-dom – Making the DOM functional.

• trifl (⭐36) – A functional user interface library with unidirectional dataflow and a virtual dom.

• funcy (⭐246) – An experiment in adding functional pattern matching to JavaScript. Experimental 🚩

• _part_ (⭐41) – A micro library that encourages functional programming by making native methods available as partially applied functions.

Libraries / Data Structures

• Immutable.js (⭐33k) – Immutable persistent data collections.

• Mori (⭐3.4k) – ClojureScript’s persistent data structures and supporting API from the comfort of vanilla JavaScript.

Libraries / Algebraic Data Types

• daggy (⭐698) – Library for creating tagged constructors.

• fantasy-combinators (⭐66) – Common combinators.

• fantasy-birds (⭐85) – Port of the Haskell package Data.Aviary.Birds. Everything for your combinatory needs.

Libraries / Lenses

• lenses (⭐212) – Composable kmett (⭐2k) style lenses.

• optics (⭐86) – Profunctor optics (Lens, Prism, iso).

• ramda-lens (⭐182) – 🐏 🔎 Lens library built on Ramda.

• fantasy-lenses (⭐108) – Composable, immutable getters and setters. (Profunctor lenses WIP)

• nanoscope (⭐176) – Lenses with dotty support.

Functional Languages that Compile to JavaScript / Lenses

• ClojureScript (⭐9.2k) – Compiles Clojure, a hosted Lisp with immutable persistent data structures, to JavaScript.

• Elm – A type-safe functional programming language for declaratively creating web browser-based graphical user interfaces. Implemented in Haskell.

• PureScript – A small strongly typed programming language that compiles to JavaScript.

• Idris – A general purpose pure functional programming language with dependent types.

• GHCJS (⭐2.6k) – Haskell to JavaScript compiler, based on GHC.

• ElixirScript (⭐1.6k) – Compiles a subset of Elixir, a dynamic, functional language designed for building scalable and maintainable applications, to JavaScript.

• Js_of_ocaml – Compiles OCaml bytecode to JavaScript, making it possible to run OCaml programs in the browser.

• Scala.js – Compiles Scala to JavaScript.

• LiveScript – LiveScript has a straightforward mapping to JavaScript and allows you to write expressive code devoid of repetitive boilerplate.

Resources / Articles

• Functional Programming Jargon (⭐18k) – Jargon from the functional programming world explained in JavaScript.

Resources / Videos

• Hey Underscore, You're Doing It Wrong! – Underscore.js claims to be a functional programming library, but is it really?

Resources / Examples and Exercises

• functional-frontend-architecture (⭐1.4k) – A functional frontend framework. Based on Ramda + union-type-js + Flyd + Snabbdom

• cube-composer (⭐2k) – A puzzle game inspired by functional programming.

• FP Youtube Search (⭐57) – YouTube search app with ReactJS, Redux, and FP concepts

• Hardcore Functional Programming in JavaScript – Learn to apply techniques from the forefront of computer science research to solve practical problems in Javascript. Discover functional programming and see it demonstrated step-by-step with how to build an example web app using abstract interfaces like Monads, Functors, Monoids and Applicatives. (commercial)

Community / Related Lists

• Awesome FRP JS (⭐285) – A curated list of awesome (functional) reactive programming stuff in JavaScript.

Mar 12, 2016

Libraries

• claire (⭐79) – A property-based testing library for clearly specifying code invariants and behaviour.

Libraries / Data Structures

• immutable-sequence.js (⭐16) – High performance implementation of Immutable Sequence in JavaScript, based on Finger Trees (⭐45).

• Timm – Immutability helpers with fast reads and acceptable writes.

• Lazy.js (⭐6k) – A utility library with a lazy engine under the hood that strives to do as little work as possible while being as flexible as possible.

Libraries / Algebraic Data Types

• union-type (⭐475) – A small JavaScript library for defining and using union types.

• freeky (⭐175) – A collection of Free monads.

Resources / Articles

• Functional programming – Many articles on various aspects of functional programming in JavaScript by Gleb Bahmutov.

Resources / Videos

• Classroom Coding with Prof. Frisby – A series that builds a “practical” web application with React and functional programming in JavaScript.

Feb 29, 2016

Community / Related Lists

• Functional Programming Resources In JavaScript (⭐305)