The HTTP GCF example from https://cloud.google.com/functions/docs/writing/http but in scalajs

MyFunctions.scala

package com.google.functions.examples.scalajs

import scala.scalajs.js.annotation._
import scala.scalajs.js
import js.DynamicImplicits._

@js.native
trait Request extends js.Any {
  val body: js.Dictionary[Any] = js.native
}
@js.native
trait Response extends js.Any {
  def status(code: Int): Response = js.native
  def send(body: String): Response = js.native
  def end(): Response = js.native
}

object MyFunctions {
  @JSExportTopLevel("helloWorld")
  def helloWorld(req: Request, res: Response): Unit = {
    req.body.get("message") match {
      case Some(str: String) =>
        println(s"Function called with message: '$str'")
        res.status(200).end()
      case _ =>
        res.status(400).send("There was no message defined!")
    }
  }
}