Use Node.js 18 in CI, fix JSDOM detection

.github/workflows/ci.yml

@@ -66,11 +66,11 @@ jobs:
             ~/Library/Caches/Coursier/v1
           key: ${{ runner.os }}-sbt-cache-v2-${{ hashFiles('**/*.sbt') }}-${{ hashFiles('project/build.properties') }}
 
-      - name: Setup NodeJS v16 LTS
+      - name: Setup NodeJS v18 LTS
         if: matrix.ci == 'ciNode' || matrix.ci == 'ciJSDOMNodeJS'
         uses: actions/setup-node@v3
         with:
-          node-version: 16
+          node-version: 18
           cache: npm
 
       - name: Install jsdom

build.sbt

@@ -47,8 +47,8 @@ ThisBuild / crossScalaVersions := Seq("2.11.12", "2.12.16", "2.13.7", "3.1.3")
 ThisBuild / githubWorkflowBuildPreamble ++= Seq(
   WorkflowStep.Use(
     UseRef.Public("actions", "setup-node", "v3"),
-    name = Some("Setup NodeJS v16 LTS"),
-    params = Map("node-version" -> "16", "cache" -> "npm"),
+    name = Some("Setup NodeJS v18 LTS"),
+    params = Map("node-version" -> "18", "cache" -> "npm"),
     cond = Some("matrix.ci == 'ciNode' || matrix.ci == 'ciJSDOMNodeJS'"),
   ),
   WorkflowStep.Run(

core/src/main/scala/org/scalajs/macrotaskexecutor/MacrotaskExecutor.scala

@@ -84,7 +84,21 @@ object MacrotaskExecutor extends ExecutionContextExecutor {
         ()
       }
 
-      if (canUsePostMessage()) {
+      if (
+        js.typeOf(
+          js.Dynamic.global.navigator
+        ) != Undefined && js.Dynamic.global.navigator.userAgent
+          .asInstanceOf[js.UndefOr[String]]
+          .exists(_.contains("jsdom"))
+      ) {
+        val setImmediate =
+          js.Dynamic.global.Node.constructor("return setImmediate")()
+
+        { k =>
+          setImmediate(k)
+          ()
+        }
+      } else if (canUsePostMessage()) {
         // postMessage is what we use for most modern browsers (when not in a webworker)
 
         // generate a unique messagePrefix for everything we do
@@ -134,20 +148,6 @@ object MacrotaskExecutor extends ExecutionContextExecutor {
           channel.port2.postMessage(handle)
           ()
         }
-      } else if (
-        js.typeOf(
-          js.Dynamic.global.navigator
-        ) != Undefined && js.Dynamic.global.navigator.userAgent
-          .asInstanceOf[js.UndefOr[String]]
-          .exists(_.contains("jsdom"))
-      ) {
-        val setImmediate =
-          js.Dynamic.global.Node.constructor("return setImmediate")()
-
-        { k =>
-          setImmediate(k)
-          ()
-        }
       } else {
         // we don't try to look for process.nextTick since scalajs doesn't support old node
         // we're also not going to bother fast-pathing for IE6; just fall through

project/plugins.sbt

@@ -1,3 +1,4 @@
+libraryDependencies += "org.scala-js" %% "scalajs-env-nodejs" % "1.4.0"
 libraryDependencies += "org.scala-js" %% "scalajs-env-selenium" % "1.1.1"
 libraryDependencies += "org.scala-js" %% "scalajs-env-jsdom-nodejs" % "1.1.0"