How to use node modules in Scala.js

Question

I just started to use Scala.js and want to port an existing node based JavaScript app to Scala.js. The first problem: I need to include the mysql module https://github.com/mysqljs/mysql to access MySQL from Scala.js.

This link Is about emitting a module and not about how to use an existing one. — rogergl
– rogergl, Commented Nov 26, 2016 at 13:41
You need to emit a module to be able to import other modules. There is a link from that page to further documentation on @JSImport which shows how to define types for things you need to import. — sjrd
– sjrd, Commented Nov 26, 2016 at 15:12
To be able to further help you, it would be good to edit your question with a concrete example of a module you wish to import, and what you want to do with it. — sjrd
– sjrd, Commented Nov 26, 2016 at 15:13

ebruchez · Accepted Answer · 2016-11-26 18:56:40Z

7

This takes a few steps:

add the ScalaJSBundlerPlugin to your plugins.sbt (example)
enable the plugin in your build.sbt (example)
create a facade (which can be minimal) for your Node module (example for node-fetch ) defining an object with something like @JSImport("node-fetch", JSImport.Namespace)
add npmDependencies in your build.sbt (example)
create a custom webpack config which configures node as a target (example)

answered Nov 26, 2016 at 18:56

ebruchez

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