[K/JS] Add ability to exclude declarations from export by a new annotation @JsExport.Ignore.

libraries/stdlib/api/js-v1/kotlin.js.kt

@@ -240,6 +240,14 @@ public external interface JsClass<T : kotlin.Any> {
 @kotlin.SinceKotlin(version = "1.3")
 public final annotation class JsExport : kotlin.Annotation {
     public constructor JsExport()
+
+    @kotlin.js.ExperimentalJsExport
+    @kotlin.annotation.Retention(value = AnnotationRetention.BINARY)
+    @kotlin.annotation.Target(allowedTargets = {AnnotationTarget.CLASS, AnnotationTarget.PROPERTY, AnnotationTarget.FUNCTION, AnnotationTarget.CONSTRUCTOR})
+    @kotlin.SinceKotlin(version = "1.8")
+    public final annotation class Ignore : kotlin.Annotation {
+        public constructor Ignore()
+    }
 }
 
 @kotlin.annotation.Retention(value = AnnotationRetention.BINARY)

libraries/stdlib/api/js/kotlin.js.kt

@@ -239,6 +239,14 @@ public external interface JsClass<T : kotlin.Any> {
 @kotlin.SinceKotlin(version = "1.3")
 public final annotation class JsExport : kotlin.Annotation {
     public constructor JsExport()
+
+    @kotlin.js.ExperimentalJsExport
+    @kotlin.annotation.Retention(value = AnnotationRetention.BINARY)
+    @kotlin.annotation.Target(allowedTargets = {AnnotationTarget.CLASS, AnnotationTarget.PROPERTY, AnnotationTarget.FUNCTION, AnnotationTarget.CONSTRUCTOR})
+    @kotlin.SinceKotlin(version = "1.8")
+    public final annotation class Ignore : kotlin.Annotation {
+        public constructor Ignore()
+    }
 }
 
 @kotlin.annotation.Retention(value = AnnotationRetention.BINARY)

libraries/stdlib/common/src/kotlin/JsAnnotationsH.kt

@@ -63,4 +63,18 @@ public annotation class ExperimentalJsExport
 @Target(CLASS, PROPERTY, FUNCTION, FILE)
 @SinceKotlin("1.4")
 @OptionalExpectation
-public expect annotation class JsExport()
+public expect annotation class JsExport() {
+    /*
+    * The annotation prevents exporting the annotated member of an exported class.
+    * This annotation is experimental, meaning that the restrictions mentioned above are subject to change.
+    */
+    @ExperimentalJsExport
+    @Retention(AnnotationRetention.BINARY)
+    @Target(CLASS, PROPERTY, FUNCTION)
+    @SinceKotlin("1.8")
+    // Suppress until bootstrapping
+    @Suppress("NESTED_OPTIONAL_EXPECTATION")
+    @OptionalExpectation
+    public annotation class Ignore()
+}
+

libraries/stdlib/js/src/kotlin/annotations.kt

@@ -190,7 +190,18 @@ public annotation class JsQualifier(val value: String)
 @Retention(AnnotationRetention.BINARY)
 @Target(CLASS, PROPERTY, FUNCTION, FILE)
 @SinceKotlin("1.3")
-public actual annotation class JsExport
+public actual annotation class JsExport {
+    /*
+    * The annotation prevents exporting the annotated member of an exported class.
+    * This annotation is experimental, meaning that the restrictions mentioned above are subject to change.
+    */
+    @ExperimentalJsExport
+    @Retention(AnnotationRetention.BINARY)
+    @Target(CLASS, PROPERTY, FUNCTION, CONSTRUCTOR)
+    @SinceKotlin("1.8")
+    public actual annotation class Ignore
+}
+
 
 /**
  * Forces a top-level property to be initialized eagerly, opposed to lazily on the first access to file and/or property.

libraries/stdlib/wasm/src/kotlin/js/annotations.kt

@@ -13,7 +13,17 @@ package kotlin.js
 @ExperimentalJsExport
 @Retention(AnnotationRetention.BINARY)
 @Target(AnnotationTarget.FUNCTION)
-public actual annotation class JsExport
+public actual annotation class JsExport {
+    @ExperimentalJsExport
+    @Retention(AnnotationRetention.BINARY)
+    @Target(
+        AnnotationTarget.CLASS,
+        AnnotationTarget.FUNCTION,
+        AnnotationTarget.PROPERTY,
+        AnnotationTarget.CONSTRUCTOR,
+    )
+    public actual annotation class Ignore
+}
 
 /**
  * Specifies JavaScript name for external and imported declarations