Scala js `@JSGlobal` `对象引用错误

Question

我有一小段代码：-

import scala.scalajs.js
import scala.scalajs.js.annotation.JSGlobal

object Main2 extends App {

  val js: Option[JS1] = for {
    jsTest <- JSTest.js1.toOption
  } yield jsTest

  println(js)

}

@js.native
@JSGlobal
object JSTest extends js.Object {
  def js1: js.UndefOr[JS1] = js.native
}


@js.native
trait JS1 extends js.Object {

  def js1: js.UndefOr[JS2] = js.native
}

@js.native
trait JS2 extends js.Object {
  def js2: js.UndefOr[Int] = js.native
}

当我尝试运行这个程序时，我得到了一个错误：-

    const value = JSTest.js1;
                  ^

ReferenceError: JSTest is not defined
    at $c_LMain2$.delayedEndpoint$Main2$1__V (D:\experiment\target\scala-2.13\file:\D:\experiment\src\main\scala\Main2.scala:8:15)
    at $c_LMain2$delayedInit$body.apply__O (D:\experiment\target\scala-2.13\file:\D:\experiment\src\main\scala\Main2.scala:5:14)
    at $f_s_App__main__AT__V (D:\experiment\target\scala-2.13\https:\raw.githubusercontent.com\scala\scala\v2.13.2\src\library\scala\Function0.scala:39:7)
    at $s_LMain2__main__AT__V (D:\experiment\target\scala-2.13\file:\D:\experiment\src\main\scala\Main2.scala:5:8)
    at D:\experiment\target\scala-2.13\experiment-fastopt.js:9360:1
    at D:\experiment\target\scala-2.13\experiment-fastopt.js:9361:4
    at Script.runInThisContext (vm.js:132:18)
    at Object.runInThisContext (vm.js:315:38)
    at [stdin]:8:25
    at Script.runInThisContext (vm.js:132:18)
[error] org.scalajs.jsenv.ExternalJSRun$NonZeroExitException: exited with code 1
[error]         at org.scalajs.jsenv.ExternalJSRun$$anon$1.run(ExternalJSRun.scala:186)
[error] stack trace is suppressed; run last Compile / run for the full output
[error] (Compile / run) org.scalajs.jsenv.ExternalJSRun$NonZeroExitException: exited with code 1
[error] Total time: 7 s, completed 20-Aug-2020, 5:47:54 pm

根据scala-js doc：- https://www.scala-js.org/doc/interoperability/global-scope.html

它应该运行，但抛出这个错误，谁能让我知道问题在这里吗？

build.sbt

name := "experiment"
version := "0.1"
scalaVersion := "2.13.3"
enablePlugins(ScalaJSPlugin)
scalaJSUseMainModuleInitializer := true

配置：-

Scala -> 2.13.3，SBT -> 1.3.13，JVM -> Java 14，scala -> 1.1.1

Answer 1

这个问题是因为从scala 0.6.33移植到scala 1.1.1而提出的，解决方案如下：-

scala-js "@JSGlobalScope" error when migrating to scala-js 1.1.1