README.md

sse-chat client written in Scala.js

This is an initial attempt at rewriting the sse-chat client with Scala.js.

Get started

There are two important sbt tasks you need in the development process:

1. sbt packageJS will package your application including the entire Scala standard library translated into JavaScript. This creates the file target/scala-2.10/example.js and its siblings example-extdeps.js and example-intdeps.jsThis task is fast as it only needs to compile the project source code and nothing else. However this really only works during development on your local machine because the browser will need to download almost 20 MB for this.

2. sbt optimizeJS run the Google Closure Compiler over your application, resulting in a file that is compact enough for production usage. For example this application is 300 KB after this step and compresses down to about 60 KB. This step is slow, so you probably don't want to run this every single time something changes.

After running each of these steps, you will need to run copy.sh to make the resulting file available to the Play project using this client.

During development, it is useful to use ~packageJS in sbt, so that each time you save a source file, a compilation of the project is triggered. You will need to run copy.shagain after each recompilation (or you manage to have sbt handle the copying, in which case I would like to ask you share by submitting a pull request). You can also use ~optimizeJS to have the task listen for changes. However, note that this will get your fans spinning and drain your battery fast if you make plenty of changes.

The non-optimized version will be available under this address: localhost:9000/react-scalajs when running play locally by executing play run in the parent directory.

Here you can find the optimized version: localhost:9000/react-scalajs-opt