Or the OG React Scala.js library: https://github.com/japgolly/scalajs-react
In Show HN: Simple games ported to Scala 3 – Try them in the browserjapgolly
scalajs-react
Scala2014–2022
japgolly / scalajs-react
scalajs-react
Facebook's React on Scala.JS
15Distinct people
18Mentions
0Explicit recommenders
1.7KGitHub stars
What to know before exploring
What it is
Facebook's React on Scala.JS
GitHub
Where it is used
No documented product use was verified in the last source check.
What people are saying
No recommendation phrase was found in the indexed comments.
No classified warning is attached to this page. Read the discussions before treating silence as approval.
Also in these discussions
- suzaku-io/diode · linked in 2 of the same discussions
Mentioned in the same Hacker News threads. That is not proof they are substitutes.
This week on Hacker News
Nov 7–Nov 14 UTC · Direct repository links and separately labeled related project stories. Indexed through 11/14/2026, 3:56:07 PM UTC.
No direct repository links were found in the indexed HN discussions over the past seven days. Older discussions are available below.
Mentions over time
HN mentions by year18 dated mentions
Observed mentions: 2014-07-04 17:33:36 UTC to 2022-06-26 20:53:25 UTC.
Counts come from the repository’s dated source evidence. Index cutoff: 2026-11-02 08:16:59 UTC.
View mention counts and date ranges
| Period | Start (UTC) | End (exclusive, UTC) | Mentions | Submissions | Comments |
|---|---|---|---|---|---|
| 2014 | 2014-01-01 00:00:00 UTC | 2015-01-01 00:00:00 UTC | 3 | 2 | 1 |
| 2015 | 2015-01-01 00:00:00 UTC | 2016-01-01 00:00:00 UTC | 3 | 0 | 3 |
| 2016 | 2016-01-01 00:00:00 UTC | 2017-01-01 00:00:00 UTC | 1 | 0 | 1 |
| 2017 | 2017-01-01 00:00:00 UTC | 2018-01-01 00:00:00 UTC | 4 | 3 | 1 |
| 2018 | 2018-01-01 00:00:00 UTC | 2019-01-01 00:00:00 UTC | 2 | 0 | 2 |
| 2019 | 2019-01-01 00:00:00 UTC | 2020-01-01 00:00:00 UTC | 2 | 0 | 2 |
| 2020 | 2020-01-01 00:00:00 UTC | 2021-01-01 00:00:00 UTC | 0 | 0 | 0 |
| 2021 | 2021-01-01 00:00:00 UTC | 2022-01-01 00:00:00 UTC | 0 | 0 | 0 |
| 2022 | 2022-01-01 00:00:00 UTC | 2023-01-01 00:00:00 UTC | 3 | 0 | 3 |
From the project README
An excerpt from the repository, fetched Nov 13, 2026.
Read the project’s introduction
scalajs-react
Lifts Facebook's React library into Scala.js and endeavours to make it as type-safe and Scala-friendly as possible.
Provides (opt-in) support for pure functional programming, with additional modules for
Cats,
Cats Effect,
and Monocle.
Comes with utility modules extra and test, helpful for React in Scala(.js), rather than React in JS.
Includes a router, testing utils, performance utils, more.
Contents
Usage & Getting Started
Modules
VDOM
Hooks
Hooks via builder
Refs
The Callback class
React Context
Delving deeper
Global Config
Types
Interoperability
Creating an Effect-Agnostic Library
React SSR (Server-Side Rendering) on the JVM
Functional programming
Scala-only Utilities
Router
Performance Management
Other
Testing
Live Examples & Demos
Changelogs — v4.1.0 (Latest)
External Resources
Tutorials / Blogs
Scala, React, and SSR
Scala.js and React: Building an Application for the Web
Templates
chandu0101 / scalajs-react-template
ochrons / scalajs-spa-tutorial
TodoMVC example
Scala.js, React and ScalaCSS Boilerplate
'Intro to React' tutorial transposed into scala.js
Libraries
test-state - Integration/Functional/Property testing for scalajs-react.
scalajs-benchmark
chandu0101 / scalajs-react-components
payalabs / scalajs-react-bridge - Boilerplate free use of JS components
payalabs / scalajs-react-mdl - (Material Design Lite components)
cquiroz / scalajs-react-virtualized - Facade for react-virtualized
cquiroz / scalajs-react-clipboard - Facade for react-copy-to-clipboard
kinoplan / scalajs-react-material-ui - Material-UI components (+ Full Demo)
diode - library for managing application state, influenced by Flux and Elm
Open Source Projects, which are using scalajs-react
Mr. Boilerplate - good example of how to properly manage state in scalajs-react
scala-weather-app - Yet another weather application, based on Scala.js, scalajs-react and Playframework
scalafiddle-editor - Web user interface for ScalaFiddle https://scalafiddle.io
scastie - An interactive playground for Scala https://scastie.scala-lang.org
Requirements:
React ≥ 19
Scala ≥ 2.13
Scala.JS ≥ 1.20
Support:
If you like what I do
—my OSS libraries, my contributions to other OSS libs, my programming blog—
and you'd like to support me, more content, more lib maintenance, please become a patron!
I do all my OSS work unpaid so showing your support will make a big difference.
Read the full README on GitHubWhat Hacker News says
18 sourcesJapgolly has put a ton of time and care into https://github.com/japgolly/scalajs-react which is a complete React binding in scalajs. This paired with something like Diode (https://github.com/suzaku-io/diode) and you get a full frontend solution in scalajs.
In From ES6 to Scala: BasicsCheck out: https://laminar.dev/ or https://github.com/PurpleKingdomGames/tyrian
Event ho it's a React wrapper it's still a really good one: https://github.com/japgolly/scalajs-react
The downside of this approach is the ecosystem isn't that big compared to JS.
In From ES6 to Scala: BasicsIn general I'd advise against using Scala.js for libraries. The Scala.js runtime is pretty heavy, and Scala's and TypeScript's type systems are different enough that it tends to be difficult to design an API that feels native in both.
Have you considered ScalaJS-React[0] or Outwatch[1] instead?
[0]: https://github.com/japgolly/scalajs-react
[1]: https://outwatch.github.io/?lang=scala
In Scala.js 1.0.0-RC1Do you know how that compares with ...
https://github.com/japgolly/scalajs-react
In Scala.js 1.0.0-RC1There are several Scala libraries providing this (the most popular probably being https://github.com/japgolly/scalajs-react). Have you tried one of them?
In Cross-Platform Language Design [pdf]If people don't want the entire UDash experience there are smaller libraries:
Binding.Scala
https://github.com/ThoughtWorksInc/Binding.scala
React
https://github.com/japgolly/scalajs-react
RPC
https://github.com/shogowada/scala-json-rpc
In Udash – Scala and Scala.js Reactive Web FrameworkThe frontend is built with ScalaJs and React (using https://github.com/japgolly/scalajs-react).
The backend is built with Scala too, mostly using Akka Streams for the data handling. As a database it uses Cassandra.
edited - word choice
In Show HN: OhMyCo.in – Real-time charts for cryptocurrency marketsScala.js has react[1] which combined with diode[2] (influenced by elm) creates a powerful framework for developing new generation of web apps. There's also a GraphQL implementation called Sangria[3].
1. https://github.com/japgolly/scalajs-react
2. https://github.com/ochrons/diode
3. http://sangria-graphql.org
In Faithful Elm and the Amazing RouterIs this meant to be a replacement for/improvement over scalajs-react [1] or scala-js-react [2] (two other libraries that wrap ReactJS in ScalaJS)?
[1] https://github.com/japgolly/scalajs-react
[2] https://github.com/xored/scala-js-react
In Scala React interface: Cross-platform apps using ScalajsYup. Using in production for a rather large monitoring UI via the awesome https://github.com/japgolly/scalajs-react project. Nothing but good things to say about it.
In Scala.js – Does anyone use it production or plan to use it production ?- IDEs for Scala are pretty good, nowadays. They do all of what you mentioned (except unhandled exceptions, because that's a Java-specific thing).
- There's no difference between Scala and Scala.js support. To your IDE, Scala.js is Just Scala.
- There is a development cycle, absolutely, and it's pretty fast! With Workbench (https://github.com/lihaoyi/workbench) you don't even need to reload the page: it does so automatically!
- For React, there is essentially scalajs-react (https://github.com/japgolly/scalajs-react). It does not support inline-XML per se, because it relies more on ScalaTags instead (https://github.com/lihaoyi/scalatags), but at some point there was a proof of concept showing it was possible to implement with macros.
In Scala.js no longer experimentalShowing the 15 most recent of 18 sources. Enable JavaScript to search and browse every indexed mention.