• 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.
• Folktale - 2020. -TS.
• prelude.ls - TS.
• claire - based testing library for clearly specifying code invariants and behaviour.
• Javascript Parser Combinator
• effect-ts - fledged functional effect system for typescript with a rich standard library. +TS
• fp-multik - JS/TS lightweight value-multimethod util
• Ramda
• Ramda Adjunct - maintained extension of Ramda.
• Ramda-extension - free functions composed only from Ramda functions.
• Rambda - A faster alternative to Ramda in under 10kB.
• Rambdax - Extended version of Rambda
• fp-multik - JS/TS lightweight value-multimethod util

Data Structures

• Immutable.js
• Immer - on-write mechanism. +TS.
• Immutable.js
• Immer - on-write mechanism. +TS.
• prelude.ts - Immutable persistent collections, functional constructs such as Option and Either, and combinators. Implemented in Typescript but supports javascript too. +CT, +TS.

Algebraic Data Types

• 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.
• Static Land
• daggy
• Sanctuary
• monet.js
• Fluture
• 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

Lenses

• 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.
• TypeScript - TypeScript is a typed superset of JavaScript that compiles to plain JavaScript.
• Gleam - Gleam is a typed, functional language that compiles to Erlang and JavaScript.
• LiveScript
• 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
• ElixirScript - lang.org/), a dynamic, functional language designed for building scalable and maintainable applications, to JavaScript.
• Reason
• LiveScript
• Gleam - Gleam is a typed, functional language that compiles to Erlang and 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
• Eloquent JavaScript
• Functional JavaScript
• Functional-Light 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
• A Monad in Practicality: First-Class Failures
• 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.
• 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.
• Favoring Curry - Practical applications of currying using Ramda.
• Why Ramda
• A Monad in Practicality: First-Class Failures
• 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 Principles in Javascript - Practical code examples to learn functional programming concepts like pure function, immutability, first-class entities, and higher order functions
• Functional programming with JavaScript

Videos

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

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

Related Lists

• lucasviola/Awesome Functional Programming
• tk-learning-center/Functional Programming Learning Path - A Learning Path for Functional Programming

Talk

• Functional Programming Slack channel