Scala Scalajs

Open-source Scala projects categorized as Scalajs

Top 23 Scala Scalaj Projects

  • Scalaz

    Principled Functional Programming in Scala

    Project mention: Going into year 2 of Software Development Foundation Degree, have a particular liking for OOP and SQL, any tips, info or pointers on where to go from there? | /r/cscareerquestions | 2023-05-29

    I'm sorry, but have you ever done functional programming for a real company, like in a functional programming language like Haskell, Scala, or F#? Have you ever used Scala cats or scalaz? Have you ever learned category theory and how to apply its abstractions in software? Listen u/judethedude2106 this person hasn't gone as far down the functional programming rabbit hole as I have. Beyond learning the basics like the difference between pure and impure functions, what are closures, what higher order functions are and the most common ones like .map, .filter, and .flatmap, the immutable collections like immutable linked lists and trees, and what a Monad is and common monads like those used for futures/promises, async programming, and Option (Some or None, which is used instead of null checking), the more advanced functional programming stuff like category theory based abstractions are totally useless for real jobs and is just a giant time suck. Don't waste years on functional programming, spend at most a few months on it and no more.

  • Quill

    Compile-time Language Integrated Queries for Scala

    Project mention: Dear Sir, You Have Built a Compiler (2022) | | 2023-08-17

    This library does exactly what you prescribe. Pretty sure under the hood it's using macros with string templates

  • WorkOS

    The modern identity platform for B2B SaaS. The APIs are flexible and easy-to-use, supporting authentication, user identity, and complex enterprise features like SSO and SCIM provisioning.

  • coursier

    Pure Scala Artifact Fetching

    Project mention: babashka not working - Fatal error: Failed to create the main Isolate. (code 8) | /r/AsahiLinux | 2023-06-01

    This is an upstream page size issue, equivalent issue here:

  • scalajs-react

    Facebook's React on Scala.JS

  • Binding.scala

    Reactive data-binding for Scala

  • Chimney

    Scala library for boilerplate-free, type-safe data transformations

    Project mention: Chimney 0.8.0 (stable) released | /r/scala | 2023-10-13
  • Laminar

    Simple, expressive, and safe UI library for Scala.js (by raquo)

    Project mention: Ask HN: Those making $500/month on side projects in 2024 – Show and tell | | 2024-01-23

    My quite niche open source project broke this threshold last year, via Github sponsorships. Of course, I put a lot of time into it, so it's not "passive income" or even "market rate income", but still, without these sponsorships I wouldn't be able to work on it so much.

    The project is Laminar, a UI library for Scala.js

  • InfluxDB

    Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.

  • slinky

    Write Scala.js React apps just like you would in ES6

    Project mention: The golden age of Kotlin and its uncertain future | | 2024-01-11

    It also benefits from being one of the only full-stack languages.

    Scala.js has excellent front-end frameworks like Slinky React [1], Laminar [2] and Scala has industry-leading concurrency libraries like ZIO [3]. I've yet to find anything that comes close for end to end web apps.


  • Airframe

    Essential Building Blocks for Scala

  • DIStage

    Productivity-oriented collection of lightweight fancy stuff for Scala toolchain

  • indigo

    An FP game engine for Scala.

    Project mention: Indigo games get physical, 0.15.0-RC3 released! | /r/scala | 2023-07-18
  • OutWatch

    The Functional and Reactive Web-Frontend Library for Scala.js

    Project mention: What does the future look like? | /r/scala | 2023-05-01

    What I wrote is obviously based on my experience as backend and data engineer. I'm so happy to see an adoption on the Frontend side (with things like Tyrian or OutWatch) and would be even happier if there was a clean path to Android. Out of curiosity, what do you find appealing in Scala, compared to e.g. Kotlin?

  • Udash

    Scala framework for building beautiful and maintainable web applications.

  • Play JSON

    The Play JSON library

  • retry

    because you should never give up, at least not on the first try (by softwaremill)

  • scalacss

    Super type-safe CSS for Scala and Scala.JS.

  • tyrian

    Elm-inspired Scala UI library.

    Project mention: Tyrian – The Elm Architecture for Scala.js | | 2024-02-29
  • monadless

    Syntactic sugar for monad composition in Scala

  • seed

    Build tool for Scala projects (by tindzk)

  • Airstream

    State propagation and event streams with mandatory ownership and no glitches (by raquo)

  • scala-graal

    Make usage of Graal features easy and safe from Scala. Also features Scala-based React SSR.

  • sbt-play-scalajs

    SBT plugin to use Scala.js along with any sbt-web server.

  • Nyaya

    Random Data Generation and/or Property Testing in Scala & Scala.JS.

  • SaaSHub

    SaaSHub - Software Alternatives and Reviews. SaaSHub helps you find the best software and product alternatives

NOTE: The open source projects on this list are ordered by number of github stars. The number of mentions indicates repo mentiontions in the last 12 Months or since we started tracking (Dec 2020). The latest post mention was on 2024-02-29.

Scala Scalajs related posts


What are some of the best open-source Scalaj projects in Scala? This list will help you:

Project Stars
1 Scalaz 4,651
2 Quill 2,136
3 coursier 1,993
4 scalajs-react 1,625
5 Binding.scala 1,584
6 Chimney 1,076
7 Laminar 703
8 slinky 638
9 Airframe 622
10 DIStage 600
11 indigo 594
12 OutWatch 456
13 Udash 444
14 Play JSON 354
15 retry 346
16 scalacss 334
17 tyrian 292
18 monadless 274
19 seed 236
20 Airstream 228
21 scala-graal 194
22 sbt-play-scalajs 191
23 Nyaya 185
SaaSHub - Software Alternatives and Reviews
SaaSHub helps you find the best software and product alternatives