Test whether Scala.js class is on the classpath of the project.

Author: exoego

scalac-scoverage-plugin/src/main/scala/scoverage/plugin.scala

@@ -108,12 +108,7 @@ class ScoverageInstrumentationComponent(val global: Global, extraAfterPhase: Opt
   private var coverageFilter: CoverageFilter = AllCoverageFilter
 
   private val isScalaJsEnabled: Boolean = {
-    try {
-      getClass.getClassLoader.loadClass("scala.scalajs.js.Any")
-      true
-    } catch {
-      case _: ClassNotFoundException => false
-    }
+    rootMirror.getClassIfDefined("scala.scalajs.js.Any") != NoSymbol
   }
 
   def setOptions(options: ScoverageOptions): Unit = {