Some fixes to the default ReactJS template.

gradle/templates.versions.toml

@@ -70,7 +70,7 @@ spring-boot-gradle-plugin = "3.3.0"
 spring-dependency-management-plugin = "1.1.4"
 micronaut-starter-aws-cdk = "4.3.7"
 spring-boot-starter-parent="3.3.0"
-graaljs = "24.0.1"  # Once this is bumped past 24.1, you should be able to remove the disabling of Loom in the config properties in the React feature.
+graaljs = "24.0.2"  # Once this is bumped past 24.1, you should be able to remove the disabling of Loom in the config properties in the React feature.
 frontend-maven-plugin = "1.15.0"
 
 [libraries]

starter-core/src/main/java/io/micronaut/starter/feature/build/gradle/templates/buildGradle.rocker.raw

@@ -246,6 +246,14 @@ protobuf {
 
 
 @if (features.contains("views-react")) {
+java {
+    // GraalJS for React server side rendering requires GraalVM.
+    toolchain {
+        vendor = JvmVendorSpec.GRAAL_VM
+        languageVersion = JavaLanguageVersion.of(21)
+    }
+}
+
 // region JavaScript compilation
 @if(gradleBuild.getDsl() == GradleDsl.KOTLIN) {
 node {

starter-core/src/main/java/io/micronaut/starter/feature/view/React.java

@@ -17,6 +17,7 @@
 
 import io.micronaut.starter.application.generator.GeneratorContext;
 import io.micronaut.starter.build.dependencies.*;
+import io.micronaut.starter.build.gradle.GradleFile;
 import io.micronaut.starter.build.gradle.GradlePlugin;
 import io.micronaut.starter.build.maven.MavenPlugin;
 import io.micronaut.starter.feature.server.MicronautServerDependent;
@@ -86,17 +87,27 @@ public void apply(GeneratorContext generatorContext) {
                         .groupId(StarterCoordinates.JS_COMMUNITY.getGroupId())
                         .artifactId(StarterCoordinates.JS_COMMUNITY.getArtifactId())
                         .version(StarterCoordinates.JS_COMMUNITY.getVersion())
-                        .pom()
                         .build()
                 );
 
+                // This plugin teaches Gradle to download NodeJS and use it to run JS programs.
                 generatorContext.addBuildPlugin(
                         GradlePlugin.builder()
                                 .id("com.github.node-gradle.node")
                                 .version(NODE_GRADLE_PLUGIN_VERSION)
                                 .buildImports("import com.github.gradle.node.npm.task.NpxTask")
                                 .build()
                 );
+
+                // This teaches Gradle to download the right GraalVM automatically (community edition).
+                // For some reason Gradle won't do it out of the box :(
+                generatorContext.addBuildPlugin(
+                        GradlePlugin.builder()
+                                .id("org.gradle.toolchains.foojay-resolver-convention")
+                                .version("0.8.0")
+                                .gradleFile(GradleFile.SETTINGS)
+                                .build()
+                );
             } else if (generatorContext.getBuildTool() == BuildTool.MAVEN) {
                 // We spell out the individual dependencies here because the Starter dependency management code for
                 // Maven builds can't express the direct pom dependency needed by Truffle.