[Gradle, JS] Fix DSL for Gradle JS wizard

idea/idea-gradle/src/org/jetbrains/kotlin/idea/configuration/KotlinDslGradleKotlinFrameworkSupportProvider.kt

@@ -182,7 +182,16 @@ abstract class AbstractKotlinDslGradleKotlinJSFrameworkSupportProvider(
     ) {
         super.addSupport(projectId, module, rootModel, modifiableModelsProvider, buildScriptData)
 
-        buildScriptData.addOther("kotlin.target.$jsSubTargetName { }")
+        buildScriptData.addOther(
+            """
+                kotlin {
+                    target {
+                        $jsSubTargetName { }
+                        produceExecutable()
+                    }
+                }
+            """.trimIndent()
+        )
         val artifactId = MAVEN_JS_STDLIB_ID.removePrefix("kotlin-")
         buildScriptData.addDependencyNotation(composeDependency(buildScriptData, artifactId))
     }

libraries/tools/kotlin-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/targets/js/KotlinJsTarget.kt

@@ -156,6 +156,10 @@ constructor(
             "Only one producing type supported. Try to set $producingType but previously ${this.producingType} found"
         }
 
+        if (this.producingType != null) {
+            return
+        }
+
         this.producingType = producingType
 
         whenBrowserConfigured {