Compatible Scala libraries

Many Scala libraries have been updated to be compatible with Scala.js. To quickly start using one of these libraries, just click on the dependency clipboard button to get the relevant SBT dependency definition.

JDK extensions
Name	Description	Dependency
scala-java-time	Platform-independent implementation of java.time
scalajs-jsjoda-as-java-time	Alternative to scala-java-time implemented by wrapping js-joda classes
scala-java-locales	Implementation of JDK8’s java.util.Locale API and parts of java.text API
scalajs-java-logging	Port of the java.util.logging API of JDK 8 for Scala.js
Functional programming
Scalaz	Library for functional programming.
Each	A macro library that converts native imperative syntax to scalaz’s monadic expressions.
future.scala	Stack-safe asynchronous programming in pure functional flavor.
tryt.scala	Monad transformers for exception handling.
RAII.scala	A collection of utilities to manage native resources in Scalaz.
Shapeless	Generic programming for Scala.
Cats	Lightweight, modular, and extensible library for functional programming.
Cats Effect	A pure, asynchronous runtime implementing the “IO” monad.
Monocle	Optics library strongly inspired by Haskell Lens.
Quicklens	Modify deeply nested fields in case classes.
fs2	Purely functional, effectful, and polymorphic stream processing and I/O.
Web libraries/frameworks
Udash	A Scala(.js) framework for building beautiful and maintainable Web Applications
Binding.scala/dom	Reactive web framework for Scala.js
ScalaTags	HTML templating library/DSL that works on both Scala/JVM and Scala.js
statictags	Write HTML in both Scala JVM & JS. Extend tags and attributes with ease!
Scala DOM Types	Scala types for your library to represent HTML tags, attributes, properties and CSS styles
MetaWeb	Functional low-level web framework for Scala and Scala.js
Widok	Reactive web framework for the JVM and Scala.js
ScalaJS Binding	Scala.js HTML binding library
ScalaCSS	ScalaCSS aims to bring type-safety and clarity to: creating CSS, using CSS, maintaining CSS and correctness of CSS
Diode	Diode is a Scala/Scala.js library for managing immutable application state with unidirectional data flow.
Sri	Sri (Scala React interface) is a scalajs library to build truly native cross platform (mobile (ios and android) and web) applications.
Outwatch	The Functional and Reactive Web-Frontend Library for Scala.js
Slinky	Write Scala.js React apps just like you would in ES6
Laminar	Simple, expressive, and safe UI library for Scala.js
Tyrian	Elm-inspired Scala UI library with first-class Cats Effect support
Linden	Functional reactive frontend framework
Serialization/pickling libraries
uPickle	Statically-typed pickling (via typeclasses/macros) for both Scala and Scala.js
BooPickle	Highly efficient binary serialization for both Scala and Scala.js
Prickle	Statically-typed pickling library with support for pickling object graphs containing shared objects and cycles
scala-json	JSON pickling, advanced compile-time marshaling, full-feature DSL and more for Scala and Scala.js
Pushka	Pure Scala pickler with annotations
Circe	Yet another JSON library for Scala (built with Cats and Shapeless)
Jello	Scala.js & JVM JSON serialization framework without thrills
Scala.js Pickling	Pickling library based on explicit registration of picklers
Msgpack4z	Functional msgpack serializer/deserializer for Scala
Scodec	Combinator library for working with binary data.
Scodec MessagePack	Yet another MessagePack implementation for Scala
ScalaPB	Generates case classes, serializers and deserializers for Protocol Buffers
kantan.csv	CSV handling library for Scala
Client-server communication
autowire	Cross-compiling statically-typed Ajax calls and RPCs
RösHTTP	A cross-platform HTTP client implementation for the browser, Node.js and the JVM.
Udash RPC	Cross-compiling strongly typed client-server communication system for the Udash framework
endpoints	Scala library to define HTTP-based communication protocols
scala-json-rpc	Let your servers and clients communicate over function calls! A JSON-RPC 2.0 library for both Scala JVM & JS
http4s	A minimal, idiomatic Scala interface for typeful, functional, streaming HTTP.
http4s-dom	http4s, in a browser near you.
feral	A framework for writing serverless functions and deploying them to the cloud.
natchez	Functional, distributed tracing library.
FRP/reactive extensions
Scala.Rx	Change-propagation/FRP library
Monix	Library for composing asynchronous, lawful, event-based programs, with Observables, Task, Coeval and low-level primitives
MetaRx	Reactive data structures for Scala and Scala.js
Binding.scala/core	Reactive data-binding for both Scala.js and JVM
Airstream	State propagation and event streams with mandatory ownership and no glitches
Dependency Injection
Airframe	Guice-like run-time dependency injection library tailored to Scala traits
MacWire	Compile-time dependency injection library
Miscellaneous
NICTA/rng	Pure-functional random value generation.
Scala-Async	An asynchronous programming facility for Scala/Scala.js.
Scalaxy Streams	Make your Scala collections faster!
jsext	Utilities for developing facades and working with Futures
shocon	A partial pure-Scala, cross-compiled implementation of the HOCON configuration language
SHocon	Simple pure-scala Typesafe HOCON implementation using FastParse
slogging	A simple logging library with an API compatible to scala-logging (and slf4j)
scribe	Logging framework for Scala and Scala.js
FastParse	Fast to write, fast-running parser-combinators in Scala/Scala.js
Nyaya	Random data generation.
cryptotpyrc	Scala.js & JVM cross compiled RSA / Crypto library.
Akka	Toolkit and runtime for building concurrent, distributed applications. Crosscompiled from Typesafe Akka sources
AkkaStream	Streaming programming on top of Akka. Crosscompiled from Typesafe Akka Stream sources
cron4s	CRON expression parser supporting multiple data-time libraries in the JVM and in the browser
squants	API for Quantities, Units of Measure and Dimensional Analysis
wvlet-log	A logging library with colors and source code locations
EvilPlot	Combinator-based 2D plotting library for easily building composable and extensible data visualizations
sconfig	Scala port of the lightbend/config HOCON Java library
blake3	Blake3 for scala
skunk	A data access library for Scala + Postgres.
Tools
sbt-scala-js-map	A Sbt plugin that configures source mapping for Scala.js projects hosted on Github
Workbench	SBT plugin for Scala.JS live-reloading in the browser. (example app)
scalajs-benchmark	Write benchmarks in Scala or JS, run in your browser. (online demo)
enableIf.scala	A library that switches Scala code at compile-time, like #if in C/C++
sbt-node	A Sbt plugin for integration with npm / node.js based build tools.

Additions and corrections to this section may be reported through GitHub issues. Please include Name, Url, Description and Dependency