Example application written in Scala.js

This is a barebone example of an application written in Scala.js.

Get started

To get started, first make the Scala.js compiler, library and sbt plugin available locally by publishing them locally. This is very easy, just follow the instructions in the Scala.js readme.

Then, copy the Scala.js runtime into the js/ subdirectory of this project. You will find it in the subdirectory target/ of Scala.js, it is named scalajs-runtime.js. Optionally, also copy the source map scalajs-runtime.js.map.

Now, you are good to go. Open sbt in this example project, and issue the task package-js. This creates the file target/example.js. You can now open index.html in your favorite Web browser!

During development, it is useful to use ~package-js in sbt, so that each time you save a source file, a compilation of the project is triggered. Hence only a refresh of your Web page is needed to see the effects of your changes.

Note that Scala.js and sbt do not play well enough together for incremental compilation to work. So package-js will recompile all your source files everytime.

Troubleshooting

I don't find scalajs-runtime.js Scala.js

You have probably forgotten to execute package-js from the sbt prompt in Scala.js.

I have unresolved dependencies on scalajs-...

You have probably forgotten to execute publish-local from the sbt prompt in Scala.js.