scalajs-bundler
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scalacenter
JSExportTopLevel doesn't work?
Maybe I'm missing something obvious, but I can't get top-level exports to work under scalajs-bundler.
I have one source file, HelloWorld.scala:
import scala.scalajs.js.annotation.JSExportTopLevel
@JSExportTopLevel("HelloWorld")
object HelloWorld {
println("yay")
println(this)
def hello(): Unit = {
println("hello")
}
}
build.sbt:
name := "hello"
scalaVersion := "2.12.4"
enablePlugins(
ScalaJSPlugin,
ScalaJSBundlerPlugin
)
libraryDependencies += "org.scala-js" %%% "scalajs-dom" % "0.9.1"
project/plugins.sbt:
addSbtPlugin("org.scala-js" % "sbt-scalajs" % "0.6.21")
addSbtPlugin("ch.epfl.scala" % "sbt-scalajs-bundler" % "0.9.0")
project/build.properties:
sbt.version=1.1.0¨
index.html:
<!DOCTYPE html>
<html>
<body>
<script type="text/javascript" src="./target/scala-2.12/scalajs-bundler/main/hello-fastopt-bundle.js"></script>
</body>
</html>
I run fastOptJS::webpack, then open the html page (as file://) in my browser, and see the two print statements in the console:
yay
HelloWorld$@1
But referencing HelloWorld gives:
Uncaught ReferenceError: HelloWorld is not defined
at <anonymous>:1:1
It seems like the object is getting renamed or obfuscated by webpack in some way?
If I don't enable ScalaJSBundlerPlugin, do regular fastOptJS, and point my index.html at that file, I get a top-level HelloWorld JS object as expected.
Sorry if I'm missing something obvious.
I think you need this: https://scalacenter.github.io/scalajs-bundler/cookbook.html#several-entry-points
