Show HN: Simple games ported to Scala 3 – Try them in the browser

• scala-js-games

  3 64 0.0 Scala

  Simple games ported to Scala.js (Scala 3)

  

• slinky

  15 642 6.4 Scala

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

For those interested in Scala.js I would recommend two UI frameworks:

a) Slinky - https://slinky.dev

b) Laminar - https://slinky.dev

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• Laminar

  26 712 8.3 Scala

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

• scala-js-games

  1 107 10.0 Scala

  Some simple games ported to Scala-Js (by lihaoyi)

Well, given that I haven't refactored the code to take full advantage of scala3, the changes are mostly on the build scripts, which is very nice because the old repo likely used scala 2.10 (or 2.11).

The only required syntax change was related to https://docs.scala-lang.org/scala3/reference/dropped-feature... (2 minor occurrences).

Original sources at https://github.com/lihaoyi/scala-js-games

• scalajs-react

  13 1,634 4.3 Scala

  Facebook's React on Scala.JS

Or the OG React Scala.js library: https://github.com/japgolly/scalajs-react

• lavamaze

  1 2 2.7 Scala

  Lava Maze is a programmable game environment in Scala.js

If you're not using macros, moving from Scala 2 to 3 is pretty easy.

I have a bunch of 2d games I use in programmable learning environments. This is the commit that did a lot of the shifting from 3 to 3.0.0-RC1

https://github.com/wbillingsley/lavamaze/commit/0d9aca52e8e8...

A lot of it was just trivia like "it's required to put parentheses around lambda function parameters now", and "if the function is declared with an empty arg list () rather than no arg list, you have to call it with an empty arg list rather than no arg list".

If I recall, there's a compiler plugin they put out that could automatically make many of those changes, but I found it took little enough time just to do them manually that investigating the plugin wasn't necessary.

An example of one of the programmable games in action:

• scala3-migrate

  2 99 8.1 Scala

  A tool to help migrating from Scala 2 to Scala 3

  

> If I recall, there's a compiler plugin they put out that could automatically make many of those changes

Actually, there are compiler options to rewrite the sources to/from scala3, I have tried this in more complex projects and it worked nicely (see https://docs.scala-lang.org/scala3/guides/migration/tooling-...)

This is the link to the plugin you mentioned which is supposed to avoid the manual syntax updates but I haven't had the need to try it, like you said, most of the times the changes are trivial enough (https://docs.scala-lang.org/scala3/guides/migration/scala3-m...).

> An example of one of the programmable games in action

This comes handy to me, looks cool! For one or another reason, I ended up in this page which seems to intend hosting the same app but it doesn't work, just wanted to let you know (https://www.wbillingsley.com/lavamaze)

There is a similar nice project which I have been looking into (https://www.kogics.net/kojo).

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• sbt-ci-release

  6 274 6.1 Scala

  sbt plugin to automate Sonatype releases from GitHub Actions

  

> Veautiful - https://www.wbillingsley.com/veautiful/

Thanks for sharing, first time I see this project mentioned.

> Any day now, I'll get a chance to improve the documentation of the framework (and give it a proper release rather than using JitPack snapshots all the time).

It is worth commenting about https://github.com/sbt/sbt-ci-release which makes it simple to auto-publish to maven central.

Suggest a related project