[K/JS] Support essential Kotlin collections (List, MutableList, Set, MutableSet, Map, MutableMap) for exporting into JS

^KT-34995 Fixed
^KT-44871 Fixed

compiler/fir/checkers/checkers.js/src/org/jetbrains/kotlin/fir/analysis/js/checkers/declaration/FirJsExportDeclarationChecker.kt

@@ -224,6 +224,12 @@ object FirJsExportDeclarationChecker : FirBasicDeclarationChecker(MppCheckerKind
                 || isNothingOrNullableNothing
                 || isPrimitiveArray
                 || isNonPrimitiveArray
+                || isList
+                || isMutableList
+                || isSet
+                || isMutableSet
+                || isMap
+                || isMutableMap
 
     private fun validateDeclarationOnConsumableName(
         declaration: FirMemberDeclaration,

compiler/fir/cones/src/org/jetbrains/kotlin/fir/types/ConeBuiltinTypeUtils.kt

@@ -35,6 +35,13 @@ val ConeKotlinType.isNullableString: Boolean get() = isBuiltinType(StandardClass
 
 val ConeKotlinType.isEnum: Boolean get() = isBuiltinType(StandardClassIds.Enum, false)
 
+val ConeKotlinType.isList: Boolean get() = isBuiltinType(StandardClassIds.List, false)
+val ConeKotlinType.isMutableList: Boolean get() = isBuiltinType(StandardClassIds.MutableList, false)
+val ConeKotlinType.isSet: Boolean get() = isBuiltinType(StandardClassIds.Set, false)
+val ConeKotlinType.isMutableSet: Boolean get() = isBuiltinType(StandardClassIds.MutableSet, false)
+val ConeKotlinType.isMap: Boolean get() = isBuiltinType(StandardClassIds.Map, false)
+val ConeKotlinType.isMutableMap: Boolean get() = isBuiltinType(StandardClassIds.MutableMap, false)
+
 val ConeKotlinType.isUByte: Boolean get() = isBuiltinType(StandardClassIds.UByte, false)
 val ConeKotlinType.isUShort: Boolean get() = isBuiltinType(StandardClassIds.UShort, false)
 val ConeKotlinType.isUInt: Boolean get() = isBuiltinType(StandardClassIds.UInt, false)

compiler/ir/backend.js/src/org/jetbrains/kotlin/ir/backend/js/JsIntrinsics.kt

@@ -349,13 +349,10 @@ class JsIntrinsics(private val irBuiltIns: IrBuiltIns, val context: JsIrBackendC
         context.symbolTable.descriptorExtension.referenceClass(context.getJsInternalClass("DoNotIntrinsify"))
     val jsFunAnnotationSymbol = context.symbolTable.descriptorExtension.referenceClass(context.getJsInternalClass("JsFun"))
     val jsNameAnnotationSymbol = context.symbolTable.descriptorExtension.referenceClass(context.getJsInternalClass("JsName"))
+    val jsExportAnnotationSymbol = context.symbolTable.descriptorExtension.referenceClass(context.getJsInternalClass("JsExport"))
     val jsGeneratorAnnotationSymbol = context.symbolTable.descriptorExtension.referenceClass(context.getJsInternalClass("JsGenerator"))
 
-    val jsExportAnnotationSymbol by lazy(LazyThreadSafetyMode.NONE) {
+    val jsExportIgnoreAnnotationSymbol by context.lazy2 {
-        context.symbolTable.descriptorExtension.referenceClass(context.getJsInternalClass("JsExport"))
-    }
-
-    val jsExportIgnoreAnnotationSymbol by lazy(LazyThreadSafetyMode.NONE) {
         jsExportAnnotationSymbol.owner
             .findDeclaration<IrClass> { it.fqNameWhenAvailable == FqName("kotlin.js.JsExport.Ignore") }
             ?.symbol ?: error("can't find kotlin.js.JsExport.Ignore annotation")

compiler/ir/backend.js/src/org/jetbrains/kotlin/ir/backend/js/JsLoweringPhases.kt

@@ -46,6 +46,12 @@ private val collectClassDefaultConstructorsPhase = makeIrModulePhase(
     description = "Collect classes default constructors to add it to metadata on code generating phase"
 )
 
+private val prepareCollectionsToExportLowering = makeIrModulePhase(
+    ::PrepareCollectionsToExportLowering,
+    name = "PrepareCollectionsToExportLowering",
+    description = "Add @JsImplicitExport to exportable collections all the declarations which we don't want to export such as `Enum.entries` or `DataClass::componentN`",
+)
+
 private val preventExportOfSyntheticDeclarationsLowering = makeIrModulePhase(
     ::ExcludeSyntheticDeclarationsFromExportLowering,
     name = "ExcludeSyntheticDeclarationsFromExportLowering",
@@ -746,7 +752,7 @@ private val escapedIdentifiersLowering = makeIrModulePhase(
 private val implicitlyExportedDeclarationsMarkingLowering = makeIrModulePhase(
     ::ImplicitlyExportedDeclarationsMarkingLowering,
     name = "ImplicitlyExportedDeclarationsMarkingLowering",
-    description = "Add @JsImplicitExport annotation to declarations which are not exported but are used inside other exported declarations as a type"
+    description = "Add @JsImplicitExport annotation to declarations which are not exported but are used inside other exported declarations as a type",
 )
 
 private val cleanupLoweringPhase = makeIrModulePhase<JsIrBackendContext>(
@@ -782,6 +788,7 @@ val mainFunctionCallWrapperLowering = makeIrModulePhase<JsIrBackendContext>(
 val loweringList = listOf<SimpleNamedCompilerPhase<JsIrBackendContext, IrModuleFragment, IrModuleFragment>>(
     scriptRemoveReceiverLowering,
     validateIrBeforeLowering,
+    prepareCollectionsToExportLowering,
     preventExportOfSyntheticDeclarationsLowering,
     inventNamesForLocalClassesPhase,
     collectClassIdentifiersLowering,

compiler/ir/backend.js/src/org/jetbrains/kotlin/ir/backend/js/compiler.kt

@@ -10,9 +10,7 @@ import org.jetbrains.kotlin.backend.common.phaser.PhaseConfig
 import org.jetbrains.kotlin.backend.common.phaser.PhaserState
 import org.jetbrains.kotlin.config.CompilerConfiguration
 import org.jetbrains.kotlin.ir.IrBuiltIns
-import org.jetbrains.kotlin.ir.backend.js.lower.collectNativeImplementations
+import org.jetbrains.kotlin.ir.backend.js.lower.*
-import org.jetbrains.kotlin.ir.backend.js.lower.generateJsTests
-import org.jetbrains.kotlin.ir.backend.js.lower.moveBodilessDeclarationsToSeparatePlace
 import org.jetbrains.kotlin.ir.backend.js.lower.serialization.ir.JsIrLinker
 import org.jetbrains.kotlin.ir.backend.js.transformers.irToJs.CompilationOutputs
 import org.jetbrains.kotlin.ir.backend.js.transformers.irToJs.JsGenerationGranularity

compiler/ir/backend.js/src/org/jetbrains/kotlin/ir/backend/js/export/ExportModelGenerator.kt

@@ -34,7 +34,10 @@ class ExportModelGenerator(val context: JsIrBackendContext, val generateNamespac
 
     fun generateExport(file: IrPackageFragment): List<ExportedDeclaration> {
         val namespaceFqName = file.packageFqName
-        val exports = file.declarations.memoryOptimizedFlatMap { declaration -> listOfNotNull(exportDeclaration(declaration)) }
+        val exports = file.declarations.memoryOptimizedMapNotNull { declaration ->
+            declaration.takeIf { it.couldBeConvertedToExplicitExport() != true }?.let(::exportDeclaration)
+        }
+
         return when {
             exports.isEmpty() -> emptyList()
             !generateNamespacesForPackages || namespaceFqName.isRoot -> exports
@@ -306,6 +309,7 @@ class ExportModelGenerator(val context: JsIrBackendContext, val generateNamespac
             val candidate = getExportCandidate(declaration) ?: continue
             if (isImplicitlyExportedClass && candidate !is IrClass) continue
             if (!shouldDeclarationBeExportedImplicitlyOrExplicitly(candidate, context)) continue
+            if (candidate.isFakeOverride && klass.isInterface) continue
 
             val processingResult = specialProcessing(candidate)
             if (processingResult != null) {
@@ -734,15 +738,15 @@ private fun shouldDeclarationBeExported(declaration: IrDeclarationWithName, cont
     if (declaration is IrClass && declaration.kind == ClassKind.ENUM_ENTRY)
         return false
 
+    if (declaration.isJsExportIgnore())
+        return false
+
     if (context.additionalExportedDeclarationNames.contains(declaration.fqNameWhenAvailable))
         return true
 
     if (context.additionalExportedDeclarations.contains(declaration))
         return true
 
-    if (declaration.isJsExportIgnore())
-        return false
-
     if (declaration is IrOverridableDeclaration<*>) {
         val overriddenNonEmpty = declaration
             .overriddenSymbols
@@ -770,7 +774,7 @@ fun IrOverridableDeclaration<*>.isAllowedFakeOverriddenDeclaration(context: JsIr
         resolveFakeOverrideMaybeAbstract { it === this || it.parentClassOrNull?.isExported(context) != true }
     }
 
-    if (firstExportedRealOverride?.parentClassOrNull.isExportedInterface(context)) {
+    if (firstExportedRealOverride?.parentClassOrNull.isExportedInterface(context) && firstExportedRealOverride?.isJsExportIgnore() != true) {
         return true
     }
 

compiler/ir/backend.js/src/org/jetbrains/kotlin/ir/backend/js/lower/ImplicitlyExportedDeclarationsMarkingLowering.kt

@@ -9,7 +9,9 @@ import org.jetbrains.kotlin.backend.common.DeclarationTransformer
 import org.jetbrains.kotlin.ir.backend.js.JsIrBackendContext
 import org.jetbrains.kotlin.ir.backend.js.export.isExported
 import org.jetbrains.kotlin.ir.backend.js.ir.JsIrBuilder
-import org.jetbrains.kotlin.ir.backend.js.utils.isJsImplicitExport
+import org.jetbrains.kotlin.ir.backend.js.lazy2
+import org.jetbrains.kotlin.ir.backend.js.utils.JsAnnotations
+import org.jetbrains.kotlin.ir.backend.js.utils.couldBeConvertedToExplicitExport
 import org.jetbrains.kotlin.ir.declarations.IrClass
 import org.jetbrains.kotlin.ir.declarations.IrDeclaration
 import org.jetbrains.kotlin.ir.declarations.IrFunction
@@ -17,17 +19,18 @@ import org.jetbrains.kotlin.ir.declarations.IrProperty
 import org.jetbrains.kotlin.ir.symbols.IrClassSymbol
 import org.jetbrains.kotlin.ir.symbols.IrTypeParameterSymbol
 import org.jetbrains.kotlin.ir.types.*
-import org.jetbrains.kotlin.ir.util.constructors
+import org.jetbrains.kotlin.ir.util.*
-import org.jetbrains.kotlin.ir.util.isPrimitiveArray
-import org.jetbrains.kotlin.ir.util.parentClassOrNull
 import org.jetbrains.kotlin.js.config.JSConfigurationKeys
+import org.jetbrains.kotlin.utils.memoryOptimizedMap
 import org.jetbrains.kotlin.utils.memoryOptimizedPlus
 
 class ImplicitlyExportedDeclarationsMarkingLowering(private val context: JsIrBackendContext) : DeclarationTransformer {
     private val strictImplicitExport = context.configuration.getBoolean(JSConfigurationKeys.GENERATE_STRICT_IMPLICIT_EXPORT)
+    private val jsExportCtor by context.lazy2 { context.intrinsics.jsExportAnnotationSymbol.constructors.single() }
+    private val jsImplicitExportCtor by context.lazy2 { context.intrinsics.jsImplicitExportAnnotationSymbol.constructors.single() }
 
     override fun transformFlat(declaration: IrDeclaration): List<IrDeclaration>? {
-        if (!strictImplicitExport || !declaration.isExported(context)) return null
+        if (!declaration.isExported(context)) return null
 
         val implicitlyExportedDeclarations = when (declaration) {
             is IrFunction -> declaration.collectImplicitlyExportedDeclarations()
@@ -36,7 +39,7 @@ class ImplicitlyExportedDeclarationsMarkingLowering(private val context: JsIrBac
             else -> emptySet()
         }
 
-        implicitlyExportedDeclarations.forEach { it.markWithJsImplicitExport() }
+        implicitlyExportedDeclarations.forEach { it.markWithJsImplicitExportOrUpgrade() }
 
         return null
     }
@@ -80,19 +83,28 @@ class ImplicitlyExportedDeclarationsMarkingLowering(private val context: JsIrBac
             classifier is IrTypeParameterSymbol -> classifier.owner.superTypes.flatMap { it.collectImplicitlyExportedDeclarations() }
                 .toSet()
 
-            classifier is IrClassSymbol -> setOfNotNull(classifier.owner.takeIf { it.shouldBeMarkedWithImplicitExport() })
+            classifier is IrClassSymbol -> setOfNotNull(classifier.owner.takeIf { it.shouldBeMarkedWithImplicitExportOrUpgraded() })
             else -> emptySet()
         }
     }
 
-    private fun IrDeclaration.shouldBeMarkedWithImplicitExport(): Boolean {
+    private fun IrDeclaration.shouldBeMarkedWithImplicitExportOrUpgraded(): Boolean {
-        return this is IrClass && !isExternal && !isExported(context) && !isJsImplicitExport()
+        return this is IrClass && !isExternal && !isExported(context)
     }
 
-    private fun IrDeclaration.markWithJsImplicitExport() {
+    private fun IrDeclaration.markWithJsImplicitExportOrUpgrade() {
-        val jsImplicitExportCtor = context.intrinsics.jsImplicitExportAnnotationSymbol.constructors.single()
+        if (couldBeConvertedToExplicitExport() == true) {
-        annotations = annotations memoryOptimizedPlus JsIrBuilder.buildConstructorCall(jsImplicitExportCtor)
+            annotations = annotations.memoryOptimizedMap {
+                if (it.isAnnotation(JsAnnotations.jsImplicitExportFqn)) {
+                    JsIrBuilder.buildConstructorCall(jsExportCtor)
+                } else it
+            }
+        } else if (strictImplicitExport) {
+            annotations = annotations memoryOptimizedPlus JsIrBuilder.buildConstructorCall(jsImplicitExportCtor).apply {
+                putValueArgument(0, false.toIrConst(context.irBuiltIns.booleanType))
+            }
 
-        parentClassOrNull?.takeIf { it.shouldBeMarkedWithImplicitExport() }?.markWithJsImplicitExport()
+            parentClassOrNull?.takeIf { it.shouldBeMarkedWithImplicitExportOrUpgraded() }?.markWithJsImplicitExportOrUpgrade()
+        }
     }
 }

compiler/ir/backend.js/src/org/jetbrains/kotlin/ir/backend/js/lower/PrepareCollectionsToExportLowering.kt

@@ -0,0 +1,88 @@
+/*
+ * Copyright 2010-2023 JetBrains s.r.o. and Kotlin Programming Language contributors.
+ * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
+ */
+
+package org.jetbrains.kotlin.ir.backend.js.lower
+
+import org.jetbrains.kotlin.backend.common.DeclarationTransformer
+import org.jetbrains.kotlin.ir.backend.js.JsIrBackendContext
+import org.jetbrains.kotlin.ir.backend.js.ir.JsIrBuilder
+import org.jetbrains.kotlin.ir.declarations.IrClass
+import org.jetbrains.kotlin.ir.declarations.IrDeclaration
+import org.jetbrains.kotlin.ir.declarations.IrDeclarationWithName
+import org.jetbrains.kotlin.ir.declarations.IrSimpleFunction
+import org.jetbrains.kotlin.ir.symbols.IrClassSymbol
+import org.jetbrains.kotlin.ir.symbols.IrConstructorSymbol
+import org.jetbrains.kotlin.ir.util.isFakeOverride
+import org.jetbrains.kotlin.ir.util.parentClassOrNull
+import org.jetbrains.kotlin.ir.util.primaryConstructor
+import org.jetbrains.kotlin.ir.util.toIrConst
+import org.jetbrains.kotlin.utils.memoryOptimizedPlus
+
+// TODO: Remove the lowering and move annotations into stdlib after solving problem with tests on KLIB
+class PrepareCollectionsToExportLowering(private val context: JsIrBackendContext) : DeclarationTransformer {
+    private val jsNameCtor by lazy(LazyThreadSafetyMode.NONE) {
+        context.intrinsics.jsNameAnnotationSymbol.primaryConstructorSymbol
+    }
+    private val jsExportIgnoreCtor by lazy(LazyThreadSafetyMode.NONE) {
+        context.intrinsics.jsExportIgnoreAnnotationSymbol.primaryConstructorSymbol
+    }
+    private val jsImplicitExportCtor by lazy(LazyThreadSafetyMode.NONE) {
+        context.intrinsics.jsImplicitExportAnnotationSymbol.primaryConstructorSymbol
+    }
+
+    private val IrClassSymbol.primaryConstructorSymbol: IrConstructorSymbol get() = owner.primaryConstructor!!.symbol
+
+    private val exportedMethodNames = setOf(
+        "asJsReadonlyArrayView",
+        "asJsArrayView",
+        "asJsReadonlySetView",
+        "asJsSetView",
+        "asJsReadonlyMapView",
+        "asJsMapView"
+    )
+
+    private val exportableSymbols = setOf(
+        context.ir.symbols.list,
+        context.ir.symbols.mutableList,
+        context.ir.symbols.set,
+        context.ir.symbols.mutableSet,
+        context.ir.symbols.map,
+        context.ir.symbols.mutableMap,
+    )
+
+    override fun transformFlat(declaration: IrDeclaration): List<IrDeclaration>? {
+        if (declaration is IrClass && declaration.symbol in exportableSymbols) {
+            declaration.addJsName()
+            declaration.markWithJsImplicitExport()
+
+            declaration.declarations.forEach {
+                if (it !is IrDeclarationWithName || it.name.toString() !in exportedMethodNames) {
+                    it.excludeFromJsExport()
+                }
+            }
+        }
+
+        return null
+    }
+
+    private fun IrDeclaration.excludeFromJsExport() {
+        if (this is IrSimpleFunction) {
+            correspondingPropertySymbol?.owner?.excludeFromJsExport()
+        }
+        annotations = annotations memoryOptimizedPlus JsIrBuilder.buildConstructorCall(jsExportIgnoreCtor)
+    }
+
+    private fun IrDeclarationWithName.addJsName() {
+        annotations = annotations memoryOptimizedPlus JsIrBuilder.buildConstructorCall(jsNameCtor).apply {
+            putValueArgument(0, "Kt${name.asString()}".toIrConst(context.irBuiltIns.stringType))
+        }
+    }
+
+    private fun IrDeclaration.markWithJsImplicitExport() {
+        annotations = annotations memoryOptimizedPlus JsIrBuilder.buildConstructorCall(jsImplicitExportCtor).apply {
+            putValueArgument(0, true.toIrConst(context.irBuiltIns.booleanType))
+        }
+    }
+}

compiler/ir/backend.js/src/org/jetbrains/kotlin/ir/backend/js/utils/AnnotationUtils.kt

@@ -36,6 +36,10 @@ object JsAnnotations {
 fun IrConstructorCall.getSingleConstStringArgument() =
     (getValueArgument(0) as IrConst<String>).value
 
+@Suppress("UNCHECKED_CAST")
+fun IrConstructorCall.getSingleConstBooleanArgument() =
+    (getValueArgument(0) as IrConst<Boolean>).value
+
 fun IrAnnotationContainer.getJsModule(): String? =
     getAnnotation(JsAnnotations.jsModuleFqn)?.getSingleConstStringArgument()
 
@@ -63,6 +67,9 @@ fun IrAnnotationContainer.isJsExport(): Boolean =
 fun IrAnnotationContainer.isJsImplicitExport(): Boolean =
     hasAnnotation(JsAnnotations.jsImplicitExportFqn)
 
+fun IrAnnotationContainer.couldBeConvertedToExplicitExport(): Boolean? =
+    getAnnotation(JsAnnotations.jsImplicitExportFqn)?.getSingleConstBooleanArgument()
+
 fun IrAnnotationContainer.isJsExportIgnore(): Boolean =
     hasAnnotation(JsAnnotations.jsExportIgnoreFqn)
 

compiler/testData/diagnostics/testsWithJsStdLib/export/unexportableTypesInSignature.fir.kt

@@ -54,3 +54,27 @@ fun foo5(<!NON_EXPORTABLE_TYPE("parameter; kotlin.Function1<kotlin.Unit, kotlin.
 @JsExport
 fun foo6(x: (A) -> A) {
 }
+
+@JsExport
+fun foo7(x: List<Int>) {
+}
+
+@JsExport
+fun foo8(x: MutableList<Int>) {
+}
+
+@JsExport
+fun foo9(x: Set<Int>) {
+}
+
+@JsExport
+fun foo10(x: MutableSet<Int>) {
+}
+
+@JsExport
+fun foo11(x: Map<String, Int>) {
+}
+
+@JsExport
+fun foo12(x: MutableMap<String, Int>) {
+}

compiler/testData/diagnostics/testsWithJsStdLib/export/unexportableTypesInSignature.kt

@@ -54,3 +54,27 @@ fun foo5(<!NON_EXPORTABLE_TYPE("parameter; (Unit) -> Unit")!>x: (Unit) -> Unit<!
 @JsExport
 fun foo6(x: (A) -> A) {
 }
+
+@JsExport
+fun foo7(x: List<Int>) {
+}
+
+@JsExport
+fun foo8(x: MutableList<Int>) {
+}
+
+@JsExport
+fun foo9(x: Set<Int>) {
+}
+
+@JsExport
+fun foo10(x: MutableSet<Int>) {
+}
+
+@JsExport
+fun foo11(x: Map<String, Int>) {
+}
+
+@JsExport
+fun foo12(x: MutableMap<String, Int>) {
+}

compiler/testData/diagnostics/testsWithJsStdLib/export/unexportableTypesInSignature.txt

@@ -5,11 +5,17 @@ package foo {
     @kotlin.js.JsExport public var x2: foo.C
     @kotlin.js.JsExport public fun bar(): foo.C
     @kotlin.js.JsExport public fun foo(/*0*/ x: foo.C): kotlin.Unit
+    @kotlin.js.JsExport public fun foo10(/*0*/ x: kotlin.collections.MutableSet<kotlin.Int>): kotlin.Unit
+    @kotlin.js.JsExport public fun foo11(/*0*/ x: kotlin.collections.Map<kotlin.String, kotlin.Int>): kotlin.Unit
+    @kotlin.js.JsExport public fun foo12(/*0*/ x: kotlin.collections.MutableMap<kotlin.String, kotlin.Int>): kotlin.Unit
     @kotlin.js.JsExport public fun foo2(): kotlin.Unit
     @kotlin.js.JsExport public fun foo3(/*0*/ x: kotlin.Unit): kotlin.Unit
     @kotlin.js.JsExport public fun foo4(/*0*/ x: () -> kotlin.Unit): kotlin.Unit
     @kotlin.js.JsExport public fun foo5(/*0*/ x: (kotlin.Unit) -> kotlin.Unit): kotlin.Unit
     @kotlin.js.JsExport public fun foo6(/*0*/ x: (foo.A) -> foo.A): kotlin.Unit
+    @kotlin.js.JsExport public fun foo7(/*0*/ x: kotlin.collections.List<kotlin.Int>): kotlin.Unit
+    @kotlin.js.JsExport public fun foo8(/*0*/ x: kotlin.collections.MutableList<kotlin.Int>): kotlin.Unit
+    @kotlin.js.JsExport public fun foo9(/*0*/ x: kotlin.collections.Set<kotlin.Int>): kotlin.Unit
 
     @kotlin.js.JsExport public final class A {
         public constructor A(/*0*/ x: foo.C, /*1*/ y: foo.C)

compiler/testData/diagnostics/testsWithStdLib/builderInference/unsafeAssignmentExtra.fir.kt

@@ -1,3 +1,4 @@
+// MUTE_LL_FIR: KT-65218
 // WITH_REFLECT
 // FIR_DUMP
 import kotlin.reflect.*

compiler/testData/diagnostics/testsWithStdLib/builderInference/unsafeAssignmentExtra.kt

@@ -1,3 +1,4 @@
+// MUTE_LL_FIR: KT-65218
 // WITH_REFLECT
 // FIR_DUMP
 import kotlin.reflect.*

compiler/testData/ir/irText/declarations/inlineCollectionOfInlineClass.kt

@@ -1,6 +1,8 @@
 // FIR_IDENTICAL
 // KT-64271
-// IGNORE_BACKEND_K2: JVM_IR
+// IGNORE_BACKEND_K1: JS_IR, JS_IR_ES6
+// IGNORE_BACKEND_K2: JVM_IR, JS_IR, JS_IR_ES6
+// ^ Set has js specific methods
 
 inline class IT(val x: Int)
 

compiler/testData/ir/irText/expressions/kt30020.kt

@@ -1,5 +1,7 @@
 // WITH_STDLIB
-// IGNORE_BACKEND_K2: JS_IR NATIVE
+// IGNORE_BACKEND_K1: JS_IR, JS_IR_ES6
+// ^ MutableList has js specific methods
+// IGNORE_BACKEND_K2: JS_IR, JS_IR_ES6, NATIVE
 // ^ the order of fake overrides is different on K2
 
 interface X {

compiler/testData/ir/irText/firProblems/kt43342.kt

@@ -1,4 +1,6 @@
 // WITH_STDLIB
+// IGNORE_BACKEND_K1: JS_IR, JS_IR_ES6
+// ^ Map has js specific methods
 // IGNORE_BACKEND_K2: JS_IR
 // IGNORE_BACKEND_K2: NATIVE
 

js/js.frontend/src/org/jetbrains/kotlin/js/resolve/diagnostics/JsExportDeclarationChecker.kt

@@ -7,6 +7,7 @@ package org.jetbrains.kotlin.js.resolve.diagnostics
 
 import com.intellij.psi.PsiElement
 import org.jetbrains.kotlin.builtins.KotlinBuiltIns
+import org.jetbrains.kotlin.builtins.StandardNames
 import org.jetbrains.kotlin.builtins.isFunctionType
 import org.jetbrains.kotlin.descriptors.*
 import org.jetbrains.kotlin.descriptors.ClassKind.*
@@ -14,6 +15,7 @@ import org.jetbrains.kotlin.js.common.RESERVED_KEYWORDS
 import org.jetbrains.kotlin.js.common.SPECIAL_KEYWORDS
 import org.jetbrains.kotlin.js.naming.NameSuggestion
 import org.jetbrains.kotlin.js.translate.utils.AnnotationsUtils
+import org.jetbrains.kotlin.name.FqName
 import org.jetbrains.kotlin.psi.KtAnnotationEntry
 import org.jetbrains.kotlin.psi.KtDeclaration
 import org.jetbrains.kotlin.psi.KtNamedDeclaration
@@ -190,9 +192,15 @@ class JsExportDeclarationChecker(private val includeUnsignedNumbers: Boolean) :
                 KotlinBuiltIns.isString(nonNullable) ||
                 (nonNullable.isPrimitiveNumberOrNullableType() && !nonNullable.isLong()) ||
                 nonNullable.isNothingOrNullableNothing() ||
-                KotlinBuiltIns.isArray(nonNullable) ||
+                (includeUnsignedNumbers && KotlinBuiltIns.isUnsignedNumber(nonNullable)) ||
-                KotlinBuiltIns.isPrimitiveArray(nonNullable) ||
+                KotlinBuiltIns.isArray(this) ||
-                (includeUnsignedNumbers && KotlinBuiltIns.isUnsignedNumber(nonNullable))
+                KotlinBuiltIns.isPrimitiveArray(this) ||
+                KotlinBuiltIns.isConstructedFromGivenClass(this, StandardNames.FqNames.list) ||
+                KotlinBuiltIns.isConstructedFromGivenClass(this, StandardNames.FqNames.mutableList) ||
+                KotlinBuiltIns.isConstructedFromGivenClass(this, StandardNames.FqNames.set) ||
+                KotlinBuiltIns.isConstructedFromGivenClass(this, StandardNames.FqNames.mutableSet) ||
+                KotlinBuiltIns.isConstructedFromGivenClass(this, StandardNames.FqNames.map) ||
+                KotlinBuiltIns.isConstructedFromGivenClass(this, StandardNames.FqNames.mutableMap)
 
         if (isPrimitiveExportableType) return true
 

js/js.tests/tests-gen/org/jetbrains/kotlin/js/test/ir/IrJsES6TypeScriptExportTestGenerated.java

@@ -57,6 +57,38 @@ public class IrJsES6TypeScriptExportTestGenerated extends AbstractIrJsES6TypeScr
         }
     }
 
+    @Nested
+    @TestMetadata("js/js.translator/testData/typescript-export/collections")
+    @TestDataPath("$PROJECT_ROOT")
+    public class Collections {
+        @Test
+        public void testAllFilesPresentInCollections() throws Exception {
+            KtTestUtil.assertAllTestsPresentByMetadataWithExcluded(this.getClass(), new File("js/js.translator/testData/typescript-export/collections"), Pattern.compile("^([^_](.+))\\.kt$"), null, TargetBackend.JS_IR_ES6, true);
+        }
+
+        @Test
+        @TestMetadata("collections.kt")
+        public void testCollections() throws Exception {
+            runTest("js/js.translator/testData/typescript-export/collections/collections.kt");
+        }
+    }
+
+    @Nested
+    @TestMetadata("js/js.translator/testData/typescript-export/collections-in-exported-file")
+    @TestDataPath("$PROJECT_ROOT")
+    public class Collections_in_exported_file {
+        @Test
+        public void testAllFilesPresentInCollections_in_exported_file() throws Exception {
+            KtTestUtil.assertAllTestsPresentByMetadataWithExcluded(this.getClass(), new File("js/js.translator/testData/typescript-export/collections-in-exported-file"), Pattern.compile("^([^_](.+))\\.kt$"), null, TargetBackend.JS_IR_ES6, true);
+        }
+
+        @Test
+        @TestMetadata("collections.kt")
+        public void testCollections() throws Exception {
+            runTest("js/js.translator/testData/typescript-export/collections-in-exported-file/collections.kt");
+        }
+    }
+
     @Nested
     @TestMetadata("js/js.translator/testData/typescript-export/constructors")
     @TestDataPath("$PROJECT_ROOT")

js/js.tests/tests-gen/org/jetbrains/kotlin/js/test/ir/IrJsTypeScriptExportTestGenerated.java

@@ -57,6 +57,38 @@ public class IrJsTypeScriptExportTestGenerated extends AbstractIrJsTypeScriptExp
         }
     }
 
+    @Nested
+    @TestMetadata("js/js.translator/testData/typescript-export/collections")
+    @TestDataPath("$PROJECT_ROOT")
+    public class Collections {
+        @Test
+        public void testAllFilesPresentInCollections() throws Exception {
+            KtTestUtil.assertAllTestsPresentByMetadataWithExcluded(this.getClass(), new File("js/js.translator/testData/typescript-export/collections"), Pattern.compile("^([^_](.+))\\.kt$"), null, TargetBackend.JS_IR, true);
+        }
+
+        @Test
+        @TestMetadata("collections.kt")
+        public void testCollections() throws Exception {
+            runTest("js/js.translator/testData/typescript-export/collections/collections.kt");
+        }
+    }
+
+    @Nested
+    @TestMetadata("js/js.translator/testData/typescript-export/collections-in-exported-file")
+    @TestDataPath("$PROJECT_ROOT")
+    public class Collections_in_exported_file {
+        @Test
+        public void testAllFilesPresentInCollections_in_exported_file() throws Exception {
+            KtTestUtil.assertAllTestsPresentByMetadataWithExcluded(this.getClass(), new File("js/js.translator/testData/typescript-export/collections-in-exported-file"), Pattern.compile("^([^_](.+))\\.kt$"), null, TargetBackend.JS_IR, true);
+        }
+
+        @Test
+        @TestMetadata("collections.kt")
+        public void testCollections() throws Exception {
+            runTest("js/js.translator/testData/typescript-export/collections-in-exported-file/collections.kt");
+        }
+    }
+
     @Nested
     @TestMetadata("js/js.translator/testData/typescript-export/constructors")
     @TestDataPath("$PROJECT_ROOT")

js/js.translator/testData/typescript-export/collections-in-exported-file/collections.d.ts

@@ -0,0 +1,53 @@
+declare namespace JS_TESTS {
+    type Nullable<T> = T | null | undefined
+    namespace kotlin.collections {
+        interface KtList<E> /* extends kotlin.collections.Collection<E> */ {
+            asJsReadonlyArrayView(): ReadonlyArray<E>;
+            readonly __doNotUseOrImplementIt: {
+                readonly "kotlin.collections.KtList": unique symbol;
+            };
+        }
+        interface KtMap<K, V> {
+            asJsReadonlyMapView(): ReadonlyMap<K, V>;
+            readonly __doNotUseOrImplementIt: {
+                readonly "kotlin.collections.KtMap": unique symbol;
+            };
+        }
+        interface KtMutableList<E> extends kotlin.collections.KtList<E>/*, kotlin.collections.MutableCollection<E> */ {
+            asJsArrayView(): Array<E>;
+            readonly __doNotUseOrImplementIt: {
+                readonly "kotlin.collections.KtMutableList": unique symbol;
+            } & kotlin.collections.KtList<E>["__doNotUseOrImplementIt"];
+        }
+        interface KtSet<E> /* extends kotlin.collections.Collection<E> */ {
+            asJsReadonlySetView(): ReadonlySet<E>;
+            readonly __doNotUseOrImplementIt: {
+                readonly "kotlin.collections.KtSet": unique symbol;
+            };
+        }
+        interface KtMutableSet<E> extends kotlin.collections.KtSet<E>/*, kotlin.collections.MutableCollection<E> */ {
+            asJsSetView(): Set<E>;
+            readonly __doNotUseOrImplementIt: {
+                readonly "kotlin.collections.KtMutableSet": unique symbol;
+            } & kotlin.collections.KtSet<E>["__doNotUseOrImplementIt"];
+        }
+        interface KtMutableMap<K, V> extends kotlin.collections.KtMap<K, V> {
+            asJsMapView(): Map<K, V>;
+            readonly __doNotUseOrImplementIt: {
+                readonly "kotlin.collections.KtMutableMap": unique symbol;
+            } & kotlin.collections.KtMap<K, V>["__doNotUseOrImplementIt"];
+        }
+    }
+    function provideList(): kotlin.collections.KtList<number>;
+    function provideMutableList(): kotlin.collections.KtMutableList<number>;
+    function provideSet(): kotlin.collections.KtSet<number>;
+    function provideMutableSet(): kotlin.collections.KtMutableSet<number>;
+    function provideMap(): kotlin.collections.KtMap<string, number>;
+    function provideMutableMap(): kotlin.collections.KtMutableMap<string, number>;
+    function consumeList(list: kotlin.collections.KtList<number>): boolean;
+    function consumeMutableList(list: kotlin.collections.KtMutableList<number>): boolean;
+    function consumeSet(list: kotlin.collections.KtSet<number>): boolean;
+    function consumeMutableSet(list: kotlin.collections.KtMutableSet<number>): boolean;
+    function consumeMap(map: kotlin.collections.KtMap<string, number>): boolean;
+    function consumeMutableMap(map: kotlin.collections.KtMutableMap<string, number>): boolean;
+}

js/js.translator/testData/typescript-export/collections-in-exported-file/collections.kt

@@ -0,0 +1,61 @@
+/** This file is generated by {@link :js:js.test:generateTypeScriptJsExportOnFileTests} task. DO NOT MODIFY MANUALLY */
+
+// CHECK_TYPESCRIPT_DECLARATIONS
+// RUN_PLAIN_BOX_FUNCTION
+// WITH_STDLIB
+// SKIP_MINIFICATION
+// SKIP_NODE_JS
+// INFER_MAIN_MODULE
+
+// TODO fix statics export in DCE-driven mode
+// SKIP_DCE_DRIVEN
+
+// MODULE: JS_TESTS
+// FILE: f1.kt
+
+@file:JsExport
+
+
+fun provideList(): List<Int> = listOf(1, 2, 3)
+
+
+fun provideMutableList(): MutableList<Int> = mutableListOf(4, 5, 6)
+
+
+fun provideSet(): Set<Int> = setOf(1, 2, 3)
+
+
+fun provideMutableSet(): MutableSet<Int> = mutableSetOf(4, 5, 6)
+
+
+fun provideMap(): Map<String, Int> = mapOf("a" to 1, "b" to 2, "c" to 3)
+
+
+fun provideMutableMap(): MutableMap<String, Int> = mutableMapOf("d" to 4, "e" to 5, "f" to 6)
+
+
+fun consumeList(list: List<Int>) = list.toString() == "[1, 2, 3]"
+
+
+fun consumeMutableList(list: MutableList<Int>): Boolean {
+    list.add(7)
+    return list.toString() == "[4, 5, 6, 7]"
+}
+
+
+fun consumeSet(list: Set<Int>) = list.toString() == "[1, 2, 3]"
+
+
+fun consumeMutableSet(list: MutableSet<Int>): Boolean {
+    list.add(7)
+    return list.toString() == "[4, 5, 6, 7]"
+}
+
+
+fun consumeMap(map: Map<String, Int>) = map.toString() == "{a=1, b=2, c=3}"
+
+
+fun consumeMutableMap(map: MutableMap<String, Int>): Boolean {
+    map["g"] = 7
+    return map.toString() == "{d=4, e=5, f=6, g=7}"
+}

js/js.translator/testData/typescript-export/collections-in-exported-file/collections__main.ts

@@ -0,0 +1,213 @@
+import provideList = JS_TESTS.provideList;
+import consumeList = JS_TESTS.consumeList;
+import provideMutableList = JS_TESTS.provideMutableList;
+import consumeMutableList = JS_TESTS.consumeMutableList;
+import provideMutableSet = JS_TESTS.provideMutableSet;
+import provideSet = JS_TESTS.provideSet;
+import consumeSet = JS_TESTS.consumeSet;
+import consumeMutableSet = JS_TESTS.consumeMutableSet;
+import provideMap = JS_TESTS.provideMap;
+import consumeMap = JS_TESTS.consumeMap;
+import provideMutableMap = JS_TESTS.provideMutableMap;
+import consumeMutableMap = JS_TESTS.consumeMutableMap;
+
+function assert(condition: boolean, message: string) {
+    if (!condition) {
+        throw message
+    }
+}
+
+function assertThrow(fn: () => void, message: string) {
+    try {
+       fn();
+       throw message;
+    } catch (e) {}
+}
+
+function box(): string {
+    testImmutableList()
+    testImmutableSet()
+    testImmutableMap()
+
+    testMutableList()
+    testMutableSet()
+    testMutableMap()
+
+    return "OK"
+}
+
+function testImmutableList() {
+    const list = provideList()
+    const listReadonlyArrayView = list.asJsReadonlyArrayView()
+
+    assert(listReadonlyArrayView[0] == 1, "Problem with accessing of element in immutable list readonly array view")
+    assert(listReadonlyArrayView["0"] == 1, "Problem with accessing of element in immutable list readonly array view by string")
+    assert(listReadonlyArrayView.map(x => x + 1).join("") == "234", "Problem with immutable list readonly array view")
+    assert(consumeList(list), "Problem with consumption of a Kotlin list")
+    assertThrow(() => { (listReadonlyArrayView as Array<number>)[1] = 4 }, "Immutable list readonly array view have ability to mutate the list by direct set")
+    assertThrow(() => { (listReadonlyArrayView as Array<number>).push(4) }, "Immutable list readonly array view have ability to mutate the list by 'push'")
+    assertThrow(() => { (listReadonlyArrayView as Array<number>).pop() }, "Immutable list readonly array view have ability to mutate the list by 'pop'")
+    // @ts-expect-error
+    assertThrow(() => { listReadonlyArrayView["foo"] }, "Immutable list getting a random index from its readonly array view")
+}
+
+function testMutableList() {
+    const mutableList = provideMutableList()
+    const mutableListReadonlyArrayView = mutableList.asJsReadonlyArrayView()
+
+    assert(mutableListReadonlyArrayView[0] == 4, "Problem with accessing of element in mutable list readonly array view")
+    assert(mutableListReadonlyArrayView["0"] == 4, "Problem with accessing of element in immutable list readonly array view by string")
+    assert(mutableListReadonlyArrayView.map(x => x + 1).join("") == "567", "Problem with mutable list readonly array view")
+    assert(!consumeList(mutableList), "Problem with consumption of a Kotlin mutable list as a list")
+    assert(consumeMutableList(mutableList), "Problem with consumption of a Kotlin mutable list as a mutable list")
+    assert(mutableListReadonlyArrayView.map(x => x + 1).join("") == "5678", "Problem with mutable list readonly array view after original list is mutated")
+    assertThrow(() => { (mutableListReadonlyArrayView as Array<number>)[1] = 4 }, "Mutable list readonly array view have ability to mutate the list by direct set")
+    assertThrow(() => { (mutableListReadonlyArrayView as Array<number>).push(4) }, "Mutable list readonly array view have ability to mutate the list by 'push'")
+    assertThrow(() => { (mutableListReadonlyArrayView as Array<number>).pop() }, "Mutable list readonly array view have ability to mutate the list by 'pop'")
+    // @ts-expect-error
+    assertThrow(() => { mutableListReadonlyArrayView["foo"] }, "Immutable list getting a random index from its readonly array view")
+
+    const mutableListArrayView = mutableList.asJsArrayView()
+    mutableListArrayView.pop()
+
+    assert(mutableListArrayView[0] == 4, "Problem with accessing of element in mutable list array view")
+    assert(mutableListArrayView["0"] == 4, "Problem with accessing of element in mutable list array view by string")
+    assert(mutableListArrayView.map(x => x + 1).join("") == "567", "Problem with mutable list array view")
+    assert(consumeMutableList(mutableList), "Problem with consumption of a Kotlin mutable list as a mutable list")
+    assert(mutableListArrayView.map(x => x + 1).join("") == "5678", "Problem with mutable list array view after original list is mutated")
+    // @ts-expect-error
+    assertThrow(() => { mutableListArrayView["foo"] = 4 }, "Mutable list setting a random index in its array view")
+
+    mutableListArrayView.shift()
+    mutableListArrayView.unshift(9)
+
+    assert(mutableListArrayView.map(x => x + 1).join("") == "10678", "Problem with mutable list array view after the view is mutated")
+
+    mutableListArrayView.sort()
+
+    assert(mutableListArrayView.map(x => x + 1).join("") == "67810", "Problem with mutable list array view after the view is mutated")
+
+    mutableListArrayView.push(3)
+
+    assert(mutableListArrayView.map(x => x + 1).join("") == "678104", "Problem with mutable list array view after the view is mutated")
+
+    mutableListArrayView[3] = 4
+
+    assert(mutableListArrayView.map(x => x + 1).join("") == "67854", "Problem with mutable list array view after the view is mutated")
+
+    mutableListArrayView["3"] = 6
+
+    assert(mutableListArrayView.map(x => x + 1).join("") == "67874", "Problem with mutable list array view after the view is mutated")
+
+    mutableListArrayView.length = 3
+
+    assert(mutableListArrayView.map(x => x + 1).join("") == "678", "Problem with mutable list array view after the view is mutated after size decreased")
+    assert(mutableListReadonlyArrayView.map(x => x + 1).join("") == "678", "Problem with mutable list readonly array view after size decreased")
+
+    assertThrow(() => { mutableListArrayView.length = 5 }, "Mutable list view size increasing works, but should not")
+}
+
+function testImmutableSet() {
+    const set = provideSet()
+    const setReadonlyView = set.asJsReadonlySetView();
+
+    assert(setReadonlyView.has(1), "Problem with accessing element of readonly view")
+    assert(joinSetOrMap(setReadonlyView) == "123", "Problem with readonly view iterator")
+    assert(consumeSet(set), "Problem with consumption of a Kotlin set")
+    assertThrow(() => { (setReadonlyView as Set<number>).add(4) }, "Set readonly view have ability to mutate the set by 'add'")
+    assertThrow(() => { (setReadonlyView as Set<number>).delete(4) }, "Set readonly view have ability to mutate the set by 'delete'")
+    assertThrow(() => { (setReadonlyView as Set<number>).clear() }, "Set readonly view have ability to mutate the set by 'clear'")
+}
+
+function testMutableSet() {
+    const mutableSet = provideMutableSet()
+    const mutableSetReadonlyView = mutableSet.asJsReadonlySetView()
+
+    assert(mutableSetReadonlyView.has(4), "Problem with accessing element of mutable set readonly view")
+    assert(joinSetOrMap(mutableSetReadonlyView) == "456", "Problem with mutable set readonly view iterator")
+    assert(!consumeSet(mutableSet), "Problem with consumption of a Kotlin mutable set as a set")
+    assert(consumeMutableSet(mutableSet), "Problem with consumption of a Kotlin mutable set as a mutable set")
+    assert(joinSetOrMap(mutableSetReadonlyView) == "4567", "Problem with mutable set readonly view after original set is mutated")
+    assertThrow(() => { (mutableSetReadonlyView as Set<number>).add(4) }, "Mutable set readonly view have ability to mutate the set by 'add'")
+    assertThrow(() => { (mutableSetReadonlyView as Set<number>).delete(4) }, "Mutable set readonly view have ability to mutate the set by 'delete'")
+    assertThrow(() => { (mutableSetReadonlyView as Set<number>).clear() }, "Mutable set readonly view have ability to mutate the set by 'clear'")
+
+    const mutableSetView = mutableSet.asJsSetView()
+
+    mutableSetView.delete(7)
+
+    assert(mutableSetView.has(4), "Problem with accessing element of mutable set view")
+    assert(joinSetOrMap(mutableSetView) == "456", "Problem with mutable set view")
+    assert(consumeMutableSet(mutableSet), "Problem with consumption of a Kotlin mutable set as a mutable set")
+    assert(joinSetOrMap(mutableSetView) == "4567", "Problem with mutable set view after original set is mutated")
+
+    mutableSetView.add(8)
+
+    assert(joinSetOrMap(mutableSetView) == "45678", "Problem with mutable set view after the view is mutated")
+
+    mutableSetView.clear()
+
+    assert(joinSetOrMap(mutableSetView) == "", "Problem with mutable set view after the view is mutated")
+}
+
+function testImmutableMap() {
+    const map = provideMap()
+    const mapReadonlyView = map.asJsReadonlyMapView()
+
+    assert(mapReadonlyView.has("a"), "Problem with accessing element in map readonly view")
+    assert(mapReadonlyView.get("a") == 1, "Problem with accessing element in map readonly view")
+    assert(joinSetOrMap(mapReadonlyView) == "[a:1][b:2][c:3]", "Problem with map readonly view iterator")
+    assert(consumeMap(map), "Problem with consumption of a Kotlin map")
+    assertThrow(() => { (mapReadonlyView as Map<string, number>).set("d", 4) }, "Map readonly view have ability to mutate the map by 'set'")
+    assertThrow(() => { (mapReadonlyView as Map<string, number>).delete("a") }, "Map readonly view have ability to mutate the map by 'delete'")
+    assertThrow(() => { (mapReadonlyView as Map<string, number>).clear() }, "Map readonly view have ability to mutate the map by 'clear'")
+}
+
+function testMutableMap() {
+    const mutableMap = provideMutableMap()
+    const mutableMapReadonlyView = mutableMap.asJsReadonlyMapView()
+
+    assert(mutableMapReadonlyView.has("d"), "Problem with accessing element in mutable map readonly view")
+    assert(mutableMapReadonlyView.get("d") == 4, "Problem with accessing element in mutable map readonly view")
+    assert(joinSetOrMap(mutableMapReadonlyView) == "[d:4][e:5][f:6]", "Problem with mutable map readonly view")
+    assert(!consumeMap(mutableMap), "Problem with consumption of a Kotlin mutable map as a map")
+    assert(consumeMutableMap(mutableMap), "Problem with consumption of a Kotlin mutable map as a mutable map")
+    assert(joinSetOrMap(mutableMapReadonlyView) == "[d:4][e:5][f:6][g:7]", "Problem with mutable map readonly view after original map is mutated")
+    assertThrow(() => { (mutableMapReadonlyView as Map<string, number>).set("d", 4) }, "Mutable map readonly view have ability to mutate the map by 'set'")
+    assertThrow(() => { (mutableMapReadonlyView as Map<string, number>).delete("a") }, "Mutable map readonly view have ability to mutate the map by 'delete'")
+    assertThrow(() => { (mutableMapReadonlyView as Map<string, number>).clear() }, "Mutable map readonly view have ability to mutate the map by 'clear'")
+
+    const mutableMapView = mutableMap.asJsMapView()
+
+    mutableMapView.delete("g")
+
+    assert(mutableMapView.has("d"), "Problem with accessing element in mutable map view")
+    assert(mutableMapView.get("d") == 4, "Problem with accessing element in mutable map view")
+    assert(joinSetOrMap(mutableMapView) == "[d:4][e:5][f:6]", "Problem with mutable map view")
+    assert(consumeMutableMap(mutableMap), "Problem with consumption of a Kotlin mutable map as a mutable map")
+    assert(joinSetOrMap(mutableMapView) == "[d:4][e:5][f:6][g:7]", "Problem with mutable map view after original map is mutated")
+
+    mutableMapView.set("h", 8)
+
+    assert(joinSetOrMap(mutableMapView) == "[d:4][e:5][f:6][g:7][h:8]", "Problem with mutable map view after the view is mutated")
+
+    mutableMapView.clear()
+
+    assert(joinSetOrMap(mutableMapView) == "", "Problem with mutable map view after the view is mutated")
+}
+
+function joinSetOrMap(setOrMap: ReadonlySet<number> | ReadonlyMap<string, number>): string {
+    let result = ""
+
+    if (setOrMap instanceof Set) {
+        setOrMap.forEach((a: any) => {
+            result += a
+        });
+    } else {
+        setOrMap.forEach((key: any, value: any) => {
+            result += `[${key}:${value}]`
+        });
+    }
+
+    return result
+}

js/js.translator/testData/typescript-export/collections-in-exported-file/tsconfig.json

@@ -0,0 +1,4 @@
+{
+  "include": [ "./*" ],
+  "extends": "../common.tsconfig.json"
+}

js/js.translator/testData/typescript-export/collections/collections.d.ts

@@ -0,0 +1,53 @@
+declare namespace JS_TESTS {
+    type Nullable<T> = T | null | undefined
+    namespace kotlin.collections {
+        interface KtList<E> /* extends kotlin.collections.Collection<E> */ {
+            asJsReadonlyArrayView(): ReadonlyArray<E>;
+            readonly __doNotUseOrImplementIt: {
+                readonly "kotlin.collections.KtList": unique symbol;
+            };
+        }
+        interface KtMap<K, V> {
+            asJsReadonlyMapView(): ReadonlyMap<K, V>;
+            readonly __doNotUseOrImplementIt: {
+                readonly "kotlin.collections.KtMap": unique symbol;
+            };
+        }
+        interface KtMutableList<E> extends kotlin.collections.KtList<E>/*, kotlin.collections.MutableCollection<E> */ {
+            asJsArrayView(): Array<E>;
+            readonly __doNotUseOrImplementIt: {
+                readonly "kotlin.collections.KtMutableList": unique symbol;
+            } & kotlin.collections.KtList<E>["__doNotUseOrImplementIt"];
+        }
+        interface KtSet<E> /* extends kotlin.collections.Collection<E> */ {
+            asJsReadonlySetView(): ReadonlySet<E>;
+            readonly __doNotUseOrImplementIt: {
+                readonly "kotlin.collections.KtSet": unique symbol;
+            };
+        }
+        interface KtMutableSet<E> extends kotlin.collections.KtSet<E>/*, kotlin.collections.MutableCollection<E> */ {
+            asJsSetView(): Set<E>;
+            readonly __doNotUseOrImplementIt: {
+                readonly "kotlin.collections.KtMutableSet": unique symbol;
+            } & kotlin.collections.KtSet<E>["__doNotUseOrImplementIt"];
+        }
+        interface KtMutableMap<K, V> extends kotlin.collections.KtMap<K, V> {
+            asJsMapView(): Map<K, V>;
+            readonly __doNotUseOrImplementIt: {
+                readonly "kotlin.collections.KtMutableMap": unique symbol;
+            } & kotlin.collections.KtMap<K, V>["__doNotUseOrImplementIt"];
+        }
+    }
+    function provideList(): kotlin.collections.KtList<number>;
+    function provideMutableList(): kotlin.collections.KtMutableList<number>;
+    function provideSet(): kotlin.collections.KtSet<number>;
+    function provideMutableSet(): kotlin.collections.KtMutableSet<number>;
+    function provideMap(): kotlin.collections.KtMap<string, number>;
+    function provideMutableMap(): kotlin.collections.KtMutableMap<string, number>;
+    function consumeList(list: kotlin.collections.KtList<number>): boolean;
+    function consumeMutableList(list: kotlin.collections.KtMutableList<number>): boolean;
+    function consumeSet(list: kotlin.collections.KtSet<number>): boolean;
+    function consumeMutableSet(list: kotlin.collections.KtMutableSet<number>): boolean;
+    function consumeMap(map: kotlin.collections.KtMap<string, number>): boolean;
+    function consumeMutableMap(map: kotlin.collections.KtMutableMap<string, number>): boolean;
+}

js/js.translator/testData/typescript-export/collections/collections.kt

@@ -0,0 +1,57 @@
+// CHECK_TYPESCRIPT_DECLARATIONS
+// RUN_PLAIN_BOX_FUNCTION
+// WITH_STDLIB
+// SKIP_MINIFICATION
+// SKIP_NODE_JS
+// INFER_MAIN_MODULE
+
+// TODO fix statics export in DCE-driven mode
+// SKIP_DCE_DRIVEN
+
+// MODULE: JS_TESTS
+// FILE: f1.kt
+
+@JsExport
+fun provideList(): List<Int> = listOf(1, 2, 3)
+
+@JsExport
+fun provideMutableList(): MutableList<Int> = mutableListOf(4, 5, 6)
+
+@JsExport
+fun provideSet(): Set<Int> = setOf(1, 2, 3)
+
+@JsExport
+fun provideMutableSet(): MutableSet<Int> = mutableSetOf(4, 5, 6)
+
+@JsExport
+fun provideMap(): Map<String, Int> = mapOf("a" to 1, "b" to 2, "c" to 3)
+
+@JsExport
+fun provideMutableMap(): MutableMap<String, Int> = mutableMapOf("d" to 4, "e" to 5, "f" to 6)
+
+@JsExport
+fun consumeList(list: List<Int>) = list.toString() == "[1, 2, 3]"
+
+@JsExport
+fun consumeMutableList(list: MutableList<Int>): Boolean {
+    list.add(7)
+    return list.toString() == "[4, 5, 6, 7]"
+}
+
+@JsExport
+fun consumeSet(list: Set<Int>) = list.toString() == "[1, 2, 3]"
+
+@JsExport
+fun consumeMutableSet(list: MutableSet<Int>): Boolean {
+    list.add(7)
+    return list.toString() == "[4, 5, 6, 7]"
+}
+
+@JsExport
+fun consumeMap(map: Map<String, Int>) = map.toString() == "{a=1, b=2, c=3}"
+
+@JsExport
+fun consumeMutableMap(map: MutableMap<String, Int>): Boolean {
+    map["g"] = 7
+    return map.toString() == "{d=4, e=5, f=6, g=7}"
+}

js/js.translator/testData/typescript-export/collections/collections__main.ts

@@ -0,0 +1,213 @@
+import provideList = JS_TESTS.provideList;
+import consumeList = JS_TESTS.consumeList;
+import provideMutableList = JS_TESTS.provideMutableList;
+import consumeMutableList = JS_TESTS.consumeMutableList;
+import provideMutableSet = JS_TESTS.provideMutableSet;
+import provideSet = JS_TESTS.provideSet;
+import consumeSet = JS_TESTS.consumeSet;
+import consumeMutableSet = JS_TESTS.consumeMutableSet;
+import provideMap = JS_TESTS.provideMap;
+import consumeMap = JS_TESTS.consumeMap;
+import provideMutableMap = JS_TESTS.provideMutableMap;
+import consumeMutableMap = JS_TESTS.consumeMutableMap;
+
+function assert(condition: boolean, message: string) {
+    if (!condition) {
+        throw message
+    }
+}
+
+function assertThrow(fn: () => void, message: string) {
+    try {
+       fn();
+       throw message;
+    } catch (e) {}
+}
+
+function box(): string {
+    testImmutableList()
+    testImmutableSet()
+    testImmutableMap()
+
+    testMutableList()
+    testMutableSet()
+    testMutableMap()
+
+    return "OK"
+}
+
+function testImmutableList() {
+    const list = provideList()
+    const listReadonlyArrayView = list.asJsReadonlyArrayView()
+
+    assert(listReadonlyArrayView[0] == 1, "Problem with accessing of element in immutable list readonly array view")
+    assert(listReadonlyArrayView["0"] == 1, "Problem with accessing of element in immutable list readonly array view by string")
+    assert(listReadonlyArrayView.map(x => x + 1).join("") == "234", "Problem with immutable list readonly array view")
+    assert(consumeList(list), "Problem with consumption of a Kotlin list")
+    assertThrow(() => { (listReadonlyArrayView as Array<number>)[1] = 4 }, "Immutable list readonly array view have ability to mutate the list by direct set")
+    assertThrow(() => { (listReadonlyArrayView as Array<number>).push(4) }, "Immutable list readonly array view have ability to mutate the list by 'push'")
+    assertThrow(() => { (listReadonlyArrayView as Array<number>).pop() }, "Immutable list readonly array view have ability to mutate the list by 'pop'")
+    // @ts-expect-error
+    assertThrow(() => { listReadonlyArrayView["foo"] }, "Immutable list getting a random index from its readonly array view")
+}
+
+function testMutableList() {
+    const mutableList = provideMutableList()
+    const mutableListReadonlyArrayView = mutableList.asJsReadonlyArrayView()
+
+    assert(mutableListReadonlyArrayView[0] == 4, "Problem with accessing of element in mutable list readonly array view")
+    assert(mutableListReadonlyArrayView["0"] == 4, "Problem with accessing of element in immutable list readonly array view by string")
+    assert(mutableListReadonlyArrayView.map(x => x + 1).join("") == "567", "Problem with mutable list readonly array view")
+    assert(!consumeList(mutableList), "Problem with consumption of a Kotlin mutable list as a list")
+    assert(consumeMutableList(mutableList), "Problem with consumption of a Kotlin mutable list as a mutable list")
+    assert(mutableListReadonlyArrayView.map(x => x + 1).join("") == "5678", "Problem with mutable list readonly array view after original list is mutated")
+    assertThrow(() => { (mutableListReadonlyArrayView as Array<number>)[1] = 4 }, "Mutable list readonly array view have ability to mutate the list by direct set")
+    assertThrow(() => { (mutableListReadonlyArrayView as Array<number>).push(4) }, "Mutable list readonly array view have ability to mutate the list by 'push'")
+    assertThrow(() => { (mutableListReadonlyArrayView as Array<number>).pop() }, "Mutable list readonly array view have ability to mutate the list by 'pop'")
+    // @ts-expect-error
+    assertThrow(() => { mutableListReadonlyArrayView["foo"] }, "Immutable list getting a random index from its readonly array view")
+
+    const mutableListArrayView = mutableList.asJsArrayView()
+    mutableListArrayView.pop()
+
+    assert(mutableListArrayView[0] == 4, "Problem with accessing of element in mutable list array view")
+    assert(mutableListArrayView["0"] == 4, "Problem with accessing of element in mutable list array view by string")
+    assert(mutableListArrayView.map(x => x + 1).join("") == "567", "Problem with mutable list array view")
+    assert(consumeMutableList(mutableList), "Problem with consumption of a Kotlin mutable list as a mutable list")
+    assert(mutableListArrayView.map(x => x + 1).join("") == "5678", "Problem with mutable list array view after original list is mutated")
+    // @ts-expect-error
+    assertThrow(() => { mutableListArrayView["foo"] = 4 }, "Mutable list setting a random index in its array view")
+
+    mutableListArrayView.shift()
+    mutableListArrayView.unshift(9)
+
+    assert(mutableListArrayView.map(x => x + 1).join("") == "10678", "Problem with mutable list array view after the view is mutated")
+
+    mutableListArrayView.sort()
+
+    assert(mutableListArrayView.map(x => x + 1).join("") == "67810", "Problem with mutable list array view after the view is mutated")
+
+    mutableListArrayView.push(3)
+
+    assert(mutableListArrayView.map(x => x + 1).join("") == "678104", "Problem with mutable list array view after the view is mutated")
+
+    mutableListArrayView[3] = 4
+
+    assert(mutableListArrayView.map(x => x + 1).join("") == "67854", "Problem with mutable list array view after the view is mutated")
+
+    mutableListArrayView["3"] = 6
+
+    assert(mutableListArrayView.map(x => x + 1).join("") == "67874", "Problem with mutable list array view after the view is mutated")
+
+    mutableListArrayView.length = 3
+
+    assert(mutableListArrayView.map(x => x + 1).join("") == "678", "Problem with mutable list array view after the view is mutated after size decreased")
+    assert(mutableListReadonlyArrayView.map(x => x + 1).join("") == "678", "Problem with mutable list readonly array view after size decreased")
+
+    assertThrow(() => { mutableListArrayView.length = 5 }, "Mutable list view size increasing works, but should not")
+}
+
+function testImmutableSet() {
+    const set = provideSet()
+    const setReadonlyView = set.asJsReadonlySetView();
+
+    assert(setReadonlyView.has(1), "Problem with accessing element of readonly view")
+    assert(joinSetOrMap(setReadonlyView) == "123", "Problem with readonly view iterator")
+    assert(consumeSet(set), "Problem with consumption of a Kotlin set")
+    assertThrow(() => { (setReadonlyView as Set<number>).add(4) }, "Set readonly view have ability to mutate the set by 'add'")
+    assertThrow(() => { (setReadonlyView as Set<number>).delete(4) }, "Set readonly view have ability to mutate the set by 'delete'")
+    assertThrow(() => { (setReadonlyView as Set<number>).clear() }, "Set readonly view have ability to mutate the set by 'clear'")
+}
+
+function testMutableSet() {
+    const mutableSet = provideMutableSet()
+    const mutableSetReadonlyView = mutableSet.asJsReadonlySetView()
+
+    assert(mutableSetReadonlyView.has(4), "Problem with accessing element of mutable set readonly view")
+    assert(joinSetOrMap(mutableSetReadonlyView) == "456", "Problem with mutable set readonly view iterator")
+    assert(!consumeSet(mutableSet), "Problem with consumption of a Kotlin mutable set as a set")
+    assert(consumeMutableSet(mutableSet), "Problem with consumption of a Kotlin mutable set as a mutable set")
+    assert(joinSetOrMap(mutableSetReadonlyView) == "4567", "Problem with mutable set readonly view after original set is mutated")
+    assertThrow(() => { (mutableSetReadonlyView as Set<number>).add(4) }, "Mutable set readonly view have ability to mutate the set by 'add'")
+    assertThrow(() => { (mutableSetReadonlyView as Set<number>).delete(4) }, "Mutable set readonly view have ability to mutate the set by 'delete'")
+    assertThrow(() => { (mutableSetReadonlyView as Set<number>).clear() }, "Mutable set readonly view have ability to mutate the set by 'clear'")
+
+    const mutableSetView = mutableSet.asJsSetView()
+
+    mutableSetView.delete(7)
+
+    assert(mutableSetView.has(4), "Problem with accessing element of mutable set view")
+    assert(joinSetOrMap(mutableSetView) == "456", "Problem with mutable set view")
+    assert(consumeMutableSet(mutableSet), "Problem with consumption of a Kotlin mutable set as a mutable set")
+    assert(joinSetOrMap(mutableSetView) == "4567", "Problem with mutable set view after original set is mutated")
+
+    mutableSetView.add(8)
+
+    assert(joinSetOrMap(mutableSetView) == "45678", "Problem with mutable set view after the view is mutated")
+
+    mutableSetView.clear()
+
+    assert(joinSetOrMap(mutableSetView) == "", "Problem with mutable set view after the view is mutated")
+}
+
+function testImmutableMap() {
+    const map = provideMap()
+    const mapReadonlyView = map.asJsReadonlyMapView()
+
+    assert(mapReadonlyView.has("a"), "Problem with accessing element in map readonly view")
+    assert(mapReadonlyView.get("a") == 1, "Problem with accessing element in map readonly view")
+    assert(joinSetOrMap(mapReadonlyView) == "[a:1][b:2][c:3]", "Problem with map readonly view iterator")
+    assert(consumeMap(map), "Problem with consumption of a Kotlin map")
+    assertThrow(() => { (mapReadonlyView as Map<string, number>).set("d", 4) }, "Map readonly view have ability to mutate the map by 'set'")
+    assertThrow(() => { (mapReadonlyView as Map<string, number>).delete("a") }, "Map readonly view have ability to mutate the map by 'delete'")
+    assertThrow(() => { (mapReadonlyView as Map<string, number>).clear() }, "Map readonly view have ability to mutate the map by 'clear'")
+}
+
+function testMutableMap() {
+    const mutableMap = provideMutableMap()
+    const mutableMapReadonlyView = mutableMap.asJsReadonlyMapView()
+
+    assert(mutableMapReadonlyView.has("d"), "Problem with accessing element in mutable map readonly view")
+    assert(mutableMapReadonlyView.get("d") == 4, "Problem with accessing element in mutable map readonly view")
+    assert(joinSetOrMap(mutableMapReadonlyView) == "[d:4][e:5][f:6]", "Problem with mutable map readonly view")
+    assert(!consumeMap(mutableMap), "Problem with consumption of a Kotlin mutable map as a map")
+    assert(consumeMutableMap(mutableMap), "Problem with consumption of a Kotlin mutable map as a mutable map")
+    assert(joinSetOrMap(mutableMapReadonlyView) == "[d:4][e:5][f:6][g:7]", "Problem with mutable map readonly view after original map is mutated")
+    assertThrow(() => { (mutableMapReadonlyView as Map<string, number>).set("d", 4) }, "Mutable map readonly view have ability to mutate the map by 'set'")
+    assertThrow(() => { (mutableMapReadonlyView as Map<string, number>).delete("a") }, "Mutable map readonly view have ability to mutate the map by 'delete'")
+    assertThrow(() => { (mutableMapReadonlyView as Map<string, number>).clear() }, "Mutable map readonly view have ability to mutate the map by 'clear'")
+
+    const mutableMapView = mutableMap.asJsMapView()
+
+    mutableMapView.delete("g")
+
+    assert(mutableMapView.has("d"), "Problem with accessing element in mutable map view")
+    assert(mutableMapView.get("d") == 4, "Problem with accessing element in mutable map view")
+    assert(joinSetOrMap(mutableMapView) == "[d:4][e:5][f:6]", "Problem with mutable map view")
+    assert(consumeMutableMap(mutableMap), "Problem with consumption of a Kotlin mutable map as a mutable map")
+    assert(joinSetOrMap(mutableMapView) == "[d:4][e:5][f:6][g:7]", "Problem with mutable map view after original map is mutated")
+
+    mutableMapView.set("h", 8)
+
+    assert(joinSetOrMap(mutableMapView) == "[d:4][e:5][f:6][g:7][h:8]", "Problem with mutable map view after the view is mutated")
+
+    mutableMapView.clear()
+
+    assert(joinSetOrMap(mutableMapView) == "", "Problem with mutable map view after the view is mutated")
+}
+
+function joinSetOrMap(setOrMap: ReadonlySet<number> | ReadonlyMap<string, number>): string {
+    let result = ""
+
+    if (setOrMap instanceof Set) {
+        setOrMap.forEach((a: any) => {
+            result += a
+        });
+    } else {
+        setOrMap.forEach((key: any, value: any) => {
+            result += `[${key}:${value}]`
+        });
+    }
+
+    return result
+}

js/js.translator/testData/typescript-export/collections/tsconfig.json

@@ -0,0 +1,4 @@
+{
+  "include": [ "./*" ],
+  "extends": "../common.tsconfig.json"
+}

js/js.translator/testData/typescript-export/common.tsconfig.json

@@ -2,6 +2,7 @@
   "compilerOptions": {
     "target": "es5",
     "strict": true,
-    "newLine": "lf"
+    "newLine": "lf",
+    "lib": ["es2015", "dom"]
   }
 }

js/js.translator/testData/typescript-export/functions-in-exported-file/functions.d.ts

@@ -1,5 +1,13 @@
 declare namespace JS_TESTS {
     type Nullable<T> = T | null | undefined
+    namespace kotlin.collections {
+        interface KtList<E> /* extends kotlin.collections.Collection<E> */ {
+            asJsReadonlyArrayView(): ReadonlyArray<E>;
+            readonly __doNotUseOrImplementIt: {
+                readonly "kotlin.collections.KtList": unique symbol;
+            };
+        }
+    }
     namespace foo {
         interface SomeExternalInterface {
         }
@@ -18,8 +26,8 @@ declare namespace JS_TESTS {
         function genericWithMultipleConstraints<T extends unknown/* kotlin.Comparable<T> */ & foo.SomeExternalInterface & Error>(x: T): T;
         function generic3<A, B, C, D, E>(a: A, b: B, c: C, d: D): Nullable<E>;
         function inlineFun(x: number, callback: (p0: number) => void): void;
-        function formatList(value: any/* kotlin.collections.List<UnknownType *> */): string;
+        function formatList(value: kotlin.collections.KtList<any /*UnknownType **/>): string;
-        function createList(): any/* kotlin.collections.List<UnknownType *> */;
+        function createList(): kotlin.collections.KtList<any /*UnknownType **/>;
         function defaultParametersAtTheBegining(a: string | undefined, b: string): string;
         function nonDefaultParameterInBetween(a: string | undefined, b: string, c?: string): string;
     }

js/js.translator/testData/typescript-export/functions/functions.d.ts

@@ -1,5 +1,13 @@
 declare namespace JS_TESTS {
     type Nullable<T> = T | null | undefined
+    namespace kotlin.collections {
+        interface KtList<E> /* extends kotlin.collections.Collection<E> */ {
+            asJsReadonlyArrayView(): ReadonlyArray<E>;
+            readonly __doNotUseOrImplementIt: {
+                readonly "kotlin.collections.KtList": unique symbol;
+            };
+        }
+    }
     namespace foo {
         interface SomeExternalInterface {
         }
@@ -18,8 +26,8 @@ declare namespace JS_TESTS {
         function genericWithMultipleConstraints<T extends unknown/* kotlin.Comparable<T> */ & foo.SomeExternalInterface & Error>(x: T): T;
         function generic3<A, B, C, D, E>(a: A, b: B, c: C, d: D): Nullable<E>;
         function inlineFun(x: number, callback: (p0: number) => void): void;
-        function formatList(value: any/* kotlin.collections.List<UnknownType *> */): string;
+        function formatList(value: kotlin.collections.KtList<any /*UnknownType **/>): string;
-        function createList(): any/* kotlin.collections.List<UnknownType *> */;
+        function createList(): kotlin.collections.KtList<any /*UnknownType **/>;
         function defaultParametersAtTheBegining(a: string | undefined, b: string): string;
         function nonDefaultParameterInBetween(a: string | undefined, b: string, c?: string): string;
     }

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

@@ -10111,6 +10111,11 @@ public open class ArrayList<E> : kotlin.collections.AbstractMutableList<E>, kotl
 
     public open override fun addAll(elements: kotlin.collections.Collection<E>): kotlin.Boolean
 
+    @kotlin.js.ExperimentalJsExport
+    @kotlin.js.ExperimentalJsCollectionsApi
+    @kotlin.SinceKotlin(version = "1.9")
+    public open override fun asJsArrayView(): kotlin.js.collections.JsArray<E>
+
     public open override fun clear(): kotlin.Unit
 
     public final fun ensureCapacity(minCapacity: kotlin.Int): kotlin.Unit
@@ -10310,6 +10315,11 @@ public open class LinkedHashSet<E> : kotlin.collections.HashSet<E>, kotlin.colle
 public interface List<out E> : kotlin.collections.Collection<E> {
     public abstract override val size: kotlin.Int { get; }
 
+    @kotlin.js.ExperimentalJsExport
+    @kotlin.js.ExperimentalJsCollectionsApi
+    @kotlin.SinceKotlin(version = "1.9")
+    public open fun asJsReadonlyArrayView(): kotlin.js.collections.JsReadonlyArray<E>
+
     public abstract override operator fun contains(element: E): kotlin.Boolean
 
     public abstract override fun containsAll(elements: kotlin.collections.Collection<E>): kotlin.Boolean
@@ -10362,6 +10372,11 @@ public interface Map<K, out V> {
 
     public abstract val values: kotlin.collections.Collection<V> { get; }
 
+    @kotlin.js.ExperimentalJsExport
+    @kotlin.js.ExperimentalJsCollectionsApi
+    @kotlin.SinceKotlin(version = "1.9")
+    public open fun asJsReadonlyMapView(): kotlin.js.collections.JsReadonlyMap<K, V>
+
     public abstract fun containsKey(key: K): kotlin.Boolean
 
     public abstract fun containsValue(value: V): kotlin.Boolean
@@ -10410,6 +10425,11 @@ public interface MutableList<E> : kotlin.collections.List<E>, kotlin.collections
 
     public abstract override fun addAll(elements: kotlin.collections.Collection<E>): kotlin.Boolean
 
+    @kotlin.js.ExperimentalJsExport
+    @kotlin.js.ExperimentalJsCollectionsApi
+    @kotlin.SinceKotlin(version = "1.9")
+    public open fun asJsArrayView(): kotlin.js.collections.JsArray<E>
+
     public abstract override fun clear(): kotlin.Unit
 
     public abstract override fun listIterator(): kotlin.collections.MutableListIterator<E>
@@ -10448,6 +10468,11 @@ public interface MutableMap<K, V> : kotlin.collections.Map<K, V> {
 
     public abstract override val values: kotlin.collections.MutableCollection<V> { get; }
 
+    @kotlin.js.ExperimentalJsExport
+    @kotlin.js.ExperimentalJsCollectionsApi
+    @kotlin.SinceKotlin(version = "1.9")
+    public open fun asJsMapView(): kotlin.js.collections.JsMap<K, V>
+
     public abstract fun clear(): kotlin.Unit
 
     public abstract fun put(key: K, value: V): V?
@@ -10466,6 +10491,11 @@ public interface MutableSet<E> : kotlin.collections.Set<E>, kotlin.collections.M
 
     public abstract override fun addAll(elements: kotlin.collections.Collection<E>): kotlin.Boolean
 
+    @kotlin.js.ExperimentalJsExport
+    @kotlin.js.ExperimentalJsCollectionsApi
+    @kotlin.SinceKotlin(version = "1.9")
+    public open fun asJsSetView(): kotlin.js.collections.JsSet<E>
+
     public abstract override fun clear(): kotlin.Unit
 
     public abstract override operator fun iterator(): kotlin.collections.MutableIterator<E>
@@ -10483,6 +10513,11 @@ public interface RandomAccess {
 public interface Set<out E> : kotlin.collections.Collection<E> {
     public abstract override val size: kotlin.Int { get; }
 
+    @kotlin.js.ExperimentalJsExport
+    @kotlin.js.ExperimentalJsCollectionsApi
+    @kotlin.SinceKotlin(version = "1.9")
+    public open fun asJsReadonlySetView(): kotlin.js.collections.JsReadonlySet<E>
+
     public abstract override operator fun contains(element: E): kotlin.Boolean
 
     public abstract override fun containsAll(elements: kotlin.collections.Collection<E>): kotlin.Boolean
@@ -10498,4 +10533,4 @@ public abstract class ShortIterator : kotlin.collections.Iterator<kotlin.Short>
     public final override operator fun next(): kotlin.Short
 
     public abstract fun nextShort(): kotlin.Short
-}
+}

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

@@ -0,0 +1,38 @@
+@kotlin.js.JsName(name = "Array")
+@kotlin.SinceKotlin(version = "1.9")
+@kotlin.js.ExperimentalJsCollectionsApi
+public open external class JsArray<E> : kotlin.js.collections.JsReadonlyArray<E> {
+    public constructor JsArray<E>()
+}
+
+@kotlin.js.JsName(name = "Map")
+@kotlin.SinceKotlin(version = "1.9")
+@kotlin.js.ExperimentalJsCollectionsApi
+public open external class JsMap<K, V> : kotlin.js.collections.JsReadonlyMap<K, V> {
+    public constructor JsMap<K, V>()
+}
+
+@kotlin.js.JsName(name = "ReadonlyArray")
+@kotlin.SinceKotlin(version = "1.9")
+@kotlin.js.ExperimentalJsCollectionsApi
+public external interface JsReadonlyArray<out E> {
+}
+
+@kotlin.js.JsName(name = "ReadonlyMap")
+@kotlin.SinceKotlin(version = "1.9")
+@kotlin.js.ExperimentalJsCollectionsApi
+public external interface JsReadonlyMap<K, out V> {
+}
+
+@kotlin.js.JsName(name = "ReadonlySet")
+@kotlin.SinceKotlin(version = "1.9")
+@kotlin.js.ExperimentalJsCollectionsApi
+public external interface JsReadonlySet<out E> {
+}
+
+@kotlin.js.JsName(name = "Set")
+@kotlin.SinceKotlin(version = "1.9")
+@kotlin.js.ExperimentalJsCollectionsApi
+public open external class JsSet<E> : kotlin.js.collections.JsReadonlySet<E> {
+    public constructor JsSet<E>()
+}

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

@@ -201,6 +201,15 @@ public final annotation class EagerInitialization : kotlin.Annotation {
     public constructor EagerInitialization()
 }
 
+@kotlin.RequiresOptIn(level = Level.WARNING)
+@kotlin.annotation.Retention(value = AnnotationRetention.BINARY)
+@kotlin.annotation.Target(allowedTargets = {AnnotationTarget.CLASS, AnnotationTarget.FUNCTION})
+@kotlin.annotation.MustBeDocumented
+@kotlin.SinceKotlin(version = "1.9")
+public final annotation class ExperimentalJsCollectionsApi : kotlin.Annotation {
+    public constructor ExperimentalJsCollectionsApi()
+}
+
 @kotlin.RequiresOptIn(level = Level.WARNING)
 @kotlin.annotation.MustBeDocumented
 @kotlin.annotation.Retention(value = AnnotationRetention.BINARY)

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

@@ -130,4 +130,19 @@ public expect annotation class JsExport() {
 )
 @MustBeDocumented
 @SinceKotlin("1.9")
-public annotation class ExperimentalJsReflectionCreateInstance
+public annotation class ExperimentalJsReflectionCreateInstance
+
+/**
+ * This annotation marks the experimental JS-collections API that allows to manipulate with native JS-collections
+ * The API can be removed completely in any further release.
+ *
+ * Any usage of a declaration annotated with `@ExperimentalJsCollectionsApi` should be accepted either by
+ * annotating that usage with the [OptIn] annotation, e.g. `@OptIn(ExperimentalJsCollectionsApi::class)`,
+ * or by using the compiler argument `-opt-in=kotlin.js.ExperimentalJsCollectionsApi`.
+ */
+@RequiresOptIn(level = RequiresOptIn.Level.WARNING)
+@Retention(AnnotationRetention.BINARY)
+@Target(AnnotationTarget.CLASS, AnnotationTarget.FUNCTION)
+@MustBeDocumented
+@SinceKotlin("1.9")
+public annotation class ExperimentalJsCollectionsApi

libraries/stdlib/js/builtins/Collections.kt

@@ -28,6 +28,8 @@
 
 package kotlin.collections
 
+import kotlin.js.collections.*
+
 /**
  * Classes that inherit from this interface can be represented as a sequence of elements that can
  * be iterated over.
@@ -146,8 +148,11 @@ public interface List<out E> : Collection<E> {
     // Query Operations
 
     override val size: Int
+
     override fun isEmpty(): Boolean
+
     override fun contains(element: @UnsafeVariance E): Boolean
+
     override fun iterator(): Iterator<E>
 
     // Bulk Operations
@@ -191,6 +196,15 @@ public interface List<out E> : Collection<E> {
      * Structural changes in the base list make the behavior of the view undefined.
      */
     public fun subList(fromIndex: Int, toIndex: Int): List<E>
+
+    /**
+     * Returns a view with the [JsReadonlyArray] methods to consume it in JavaScript as a regular readonly array.
+     * Structural changes in the base list are synchronized with the view.
+     */
+    @ExperimentalJsExport
+    @ExperimentalJsCollectionsApi
+    @SinceKotlin("1.9")
+    public fun asJsReadonlyArrayView(): JsReadonlyArray<E> = createJsReadonlyArrayViewFrom(this)
 }
 
 /**
@@ -226,7 +240,9 @@ public interface MutableList<E> : List<E>, MutableCollection<E> {
     public fun addAll(index: Int, elements: Collection<E>): Boolean
 
     override fun removeAll(elements: Collection<E>): Boolean
+
     override fun retainAll(elements: Collection<E>): Boolean
+
     override fun clear(): Unit
 
     // Positional Access Operations
@@ -256,6 +272,15 @@ public interface MutableList<E> : List<E>, MutableCollection<E> {
 
     // View
     override fun subList(fromIndex: Int, toIndex: Int): MutableList<E>
+
+    /**
+     * Returns a view with the [JsArray] methods to consume it in JavaScript as a regular array.
+     * Structural changes in the base list are synchronized with the view, and vice verse.
+     */
+    @ExperimentalJsExport
+    @ExperimentalJsCollectionsApi
+    @SinceKotlin("1.9")
+    public fun asJsArrayView(): JsArray<E> = createJsArrayViewFrom(this)
 }
 
 /**
@@ -268,12 +293,24 @@ public interface Set<out E> : Collection<E> {
     // Query Operations
 
     override val size: Int
+
     override fun isEmpty(): Boolean
+
     override fun contains(element: @UnsafeVariance E): Boolean
+
     override fun iterator(): Iterator<E>
 
     // Bulk Operations
     override fun containsAll(elements: Collection<@UnsafeVariance E>): Boolean
+
+    /**
+     * Returns a view with the [JsReadonlySet] methods to consume it in JavaScript as a regular readonly Set.
+     * Structural changes in the base set are synchronized with the view.
+     */
+    @ExperimentalJsExport
+    @ExperimentalJsCollectionsApi
+    @SinceKotlin("1.9")
+    public fun asJsReadonlySetView(): JsReadonlySet<E> = createJsReadonlySetViewFrom(this)
 }
 
 /**
@@ -299,9 +336,21 @@ public interface MutableSet<E> : Set<E>, MutableCollection<E> {
     // Bulk Modification Operations
 
     override fun addAll(elements: Collection<E>): Boolean
+
     override fun removeAll(elements: Collection<E>): Boolean
+
     override fun retainAll(elements: Collection<E>): Boolean
+
     override fun clear(): Unit
+
+    /**
+     * Returns a view with the [JsSet] methods to consume it in JavaScript as a regular Set.
+     * Structural changes in the base set are synchronized with the view, and vice verse.
+     */
+    @ExperimentalJsExport
+    @ExperimentalJsCollectionsApi
+    @SinceKotlin("1.9")
+    public fun asJsSetView(): JsSet<E> = createJsSetViewFrom(this)
 }
 
 /**
@@ -370,6 +419,15 @@ public interface Map<K, out V> {
          */
         public val value: V
     }
+
+    /**
+     * Returns a view with the [JsReadonlyMap] methods to consume it in JavaScript as a regular readonly Map.
+     * Structural changes in the base map are synchronized with the view.
+     */
+    @ExperimentalJsExport
+    @ExperimentalJsCollectionsApi
+    @SinceKotlin("1.9")
+    public fun asJsReadonlyMapView(): JsReadonlyMap<K, V> = createJsReadonlyMapViewFrom(this)
 }
 
 /**
@@ -432,4 +490,13 @@ public interface MutableMap<K, V> : Map<K, V> {
          */
         public fun setValue(newValue: V): V
     }
+
+    /**
+     * Returns a view with the [JsMap] methods to consume it in JavaScript as a regular Map.
+     * Structural changes in the base map are synchronized with the view, and vice verse.
+     */
+    @ExperimentalJsExport
+    @ExperimentalJsCollectionsApi
+    @SinceKotlin("1.9")
+    public fun asJsMapView(): JsMap<K, V> = createJsMapViewFrom(this)
 }

libraries/stdlib/js/runtime/collectionsInterop.kt

@@ -0,0 +1,220 @@
+/*
+ * Copyright 2010-2023 JetBrains s.r.o. and Kotlin Programming Language contributors.
+ * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
+ */
+@file:OptIn(ExperimentalJsCollectionsApi::class)
+
+package kotlin.collections
+
+import kotlin.js.collections.*
+
+private class JsArrayView<E> : JsArray<E>()
+
+private fun UNSUPPORTED_OPERATION() {
+    throw UnsupportedOperationException()
+}
+
+internal fun <E> createJsReadonlyArrayViewFrom(list: List<E>): JsReadonlyArray<E> =
+    createJsArrayViewWith(
+        listSize = { list.size },
+        listGet = { i -> list[i] },
+        listSet = ::UNSUPPORTED_OPERATION.asDynamic(),
+        listDecreaseSize = ::UNSUPPORTED_OPERATION.asDynamic(),
+        listIncreaseSize = ::UNSUPPORTED_OPERATION.asDynamic()
+    )
+
+internal fun <E> createJsArrayViewFrom(list: MutableList<E>): JsArray<E> =
+    createJsArrayViewWith(
+        listSize = { list.size },
+        listGet = { i -> list[i] },
+        listSet = { i, v -> list[i] = v },
+        listDecreaseSize = { size -> list.subList(list.size - size, list.size).clear() },
+        listIncreaseSize = ::UNSUPPORTED_OPERATION.asDynamic()
+    )
+
+@Suppress("UNUSED_VARIABLE", "UNUSED_PARAMETER")
+private fun <E> createJsArrayViewWith(
+    listSize: () -> Int,
+    listGet: (Int) -> E,
+    listSet: (Int, E) -> Unit,
+    listDecreaseSize: (Int) -> Unit,
+    listIncreaseSize: (Int) -> Unit,
+): dynamic {
+    val arrayView = objectCreate<JsArrayView<*>>()
+
+    return js("""
+       new Proxy(arrayView, {
+           get: function(target, prop, receiver) {
+               if (prop === "length") return listSize();
+               var type = typeof prop
+               var index = type === "string" || type === "number" ? +prop : undefined
+               if (!isNaN(index)) return listGet(index);
+               return target[prop]
+           },
+           has: function(target, key) { return !isNaN(key) && key < listSize() },
+           set: function(obj, prop, value) {
+                if (prop === "length") {
+                    var size = listSize();
+                    var newSize = type === "string" || type === "number" ? +prop : undefined
+                    if (isNaN(newSize)) throw new RangeError("invalid array length")
+                    if (newSize < size) listDecreaseSize(size - newSize)
+                    else listIncreaseSize(newSize - size)
+                    return true
+                } 
+                
+                var type = typeof prop;
+                var index = type === "string" || type === "number" ? +prop : undefined;
+                
+                if (isNaN(index)) return false;
+                
+                listSet(index, value)
+                
+                return true
+           },
+       }) 
+    """)
+}
+
+private class JsSetView<E> : JsSet<E>()
+
+internal fun <E> createJsReadonlySetViewFrom(set: Set<E>): JsReadonlySet<E> =
+    createJsSetViewWith<E>(
+        setSize = { set.size },
+        setAdd = ::UNSUPPORTED_OPERATION.asDynamic(),
+        setRemove = ::UNSUPPORTED_OPERATION.asDynamic(),
+        setClear = ::UNSUPPORTED_OPERATION.asDynamic(),
+        setContains = { v -> set.contains(v) },
+        valuesIterator = { createJsIteratorFrom(set.iterator()) },
+        entriesIterator = { createJsIteratorFrom(set.iterator()) { arrayOf(it, it) } },
+        forEach = { cb, t -> forEach(cb, t) }
+    )
+
+internal fun <E> createJsSetViewFrom(set: MutableSet<E>): JsSet<E> =
+    createJsSetViewWith<E>(
+        setSize = { set.size },
+        setAdd = { v -> set.add(v) },
+        setRemove = { v -> set.remove(v) },
+        setClear = { set.clear() },
+        setContains = { v -> set.contains(v) },
+        valuesIterator = { createJsIteratorFrom(set.iterator()) },
+        entriesIterator = { createJsIteratorFrom(set.iterator()) { arrayOf(it, it) } },
+        forEach = { cb, t -> forEach(cb, t) }
+    )
+
+@Suppress("UNUSED_VARIABLE", "UNUSED_PARAMETER")
+private fun <E> createJsSetViewWith(
+    setSize: () -> Int,
+    setAdd: (E) -> Unit,
+    setRemove: (E) -> Boolean,
+    setClear: () -> Unit,
+    setContains: (E) -> Boolean,
+    valuesIterator: () -> dynamic,
+    entriesIterator: () -> dynamic,
+    forEach: (dynamic, dynamic) -> Unit,
+): dynamic {
+    val setView = objectCreate<JsSetView<E>>().also {
+        js("it[Symbol.iterator] = valuesIterator")
+        defineProp(it, "size", setSize, VOID)
+    }
+
+    return js("""
+       Object.assign(setView, {
+            add: function(value) { setAdd(value); return this },
+            'delete': setRemove,
+            clear: setClear,
+            has: setContains,
+            keys: valuesIterator,
+            values: valuesIterator,
+            entries: entriesIterator,
+            forEach: function (cb, thisArg) { forEach(cb, thisArg || setView) }
+       })
+    """)
+}
+
+
+private class JsMapView<K, V> : JsMap<K, V>()
+
+internal fun <K, V> createJsReadonlyMapViewFrom(map: Map<K, V>): JsReadonlyMap<K, V> =
+    createJsMapViewWith<K, V>(
+        mapSize = { map.size },
+        mapGet = { k -> map[k] },
+        mapContains = { k -> map.containsKey(k) },
+        mapPut = ::UNSUPPORTED_OPERATION.asDynamic(),
+        mapRemove = ::UNSUPPORTED_OPERATION.asDynamic(),
+        mapClear = ::UNSUPPORTED_OPERATION.asDynamic(),
+        keysIterator = { createJsIteratorFrom(map.keys.iterator()) },
+        valuesIterator = { createJsIteratorFrom(map.values.iterator()) },
+        entriesIterator = { createJsIteratorFrom(map.entries.iterator()) { arrayOf(it.key, it.value) } },
+        forEach = { cb, t -> forEach(cb, t) }
+    )
+
+internal fun <K, V> createJsMapViewFrom(map: MutableMap<K, V>): JsMap<K, V> =
+    createJsMapViewWith<K, V>(
+        mapSize = { map.size },
+        mapGet = { k -> map[k] },
+        mapContains = { k -> map.containsKey(k) },
+        mapPut = { k, v -> map.put(k, v) },
+        mapRemove = { k -> map.remove(k) },
+        mapClear = { map.clear() },
+        keysIterator = { createJsIteratorFrom(map.keys.iterator()) },
+        valuesIterator = { createJsIteratorFrom(map.values.iterator()) },
+        entriesIterator = { createJsIteratorFrom(map.entries.iterator()) { arrayOf(it.key, it.value) } },
+        forEach = { cb, t -> forEach(cb, t) }
+    )
+
+@Suppress("UNUSED_VARIABLE", "UNUSED_PARAMETER")
+private fun <K, V> createJsMapViewWith(
+    mapSize: () -> Int,
+    mapGet: (K) -> V?,
+    mapContains: (K) -> Boolean,
+    mapPut: (K, V) -> Unit,
+    mapRemove: (K) -> Unit,
+    mapClear: () -> Unit,
+    keysIterator: () -> dynamic,
+    valuesIterator: () -> dynamic,
+    entriesIterator: () -> dynamic,
+    forEach: (dynamic, dynamic) -> Unit,
+): dynamic {
+    val mapView = objectCreate<JsMapView<K, V>>().also {
+        js("it[Symbol.iterator] = entriesIterator")
+        defineProp(it, "size", mapSize, VOID)
+    }
+
+    return js("""
+       Object.assign(mapView, {
+            get: mapGet,
+            set: function(key, value) { mapPut(key, value); return this },
+            'delete': mapRemove,
+            clear: mapClear,
+            has: mapContains,
+            keys: valuesIterator,
+            values: valuesIterator,
+            entries: entriesIterator,
+            forEach: function (cb, thisArg) { forEach(cb, thisArg || mapView) }
+       })
+    """)
+}
+
+@Suppress("UNUSED_VARIABLE", "UNUSED_PARAMETER")
+private fun <T> createJsIteratorFrom(iterator: Iterator<T>, transform: (T) -> dynamic = { it }): dynamic {
+    val iteratorNext = { iterator.next() }
+    val iteratorHasNext = { iterator.hasNext() }
+    return js("""{
+        next: function() {
+            var result = { done: !iteratorHasNext() };
+            if (!result.done) result.value = transform(iteratorNext());
+            return result;
+        }
+    }""")
+}
+
+private fun forEach(cb: (dynamic, dynamic, dynamic) -> Unit, thisArg: dynamic) {
+    val iterator = thisArg.entries()
+    var result = iterator.next()
+
+    while (!result.done) {
+        val value = result.value
+        cb(value[0], value[1], thisArg)
+        result = iterator.next()
+    }
+}

libraries/stdlib/js/runtime/coreRuntime.kt

@@ -208,7 +208,7 @@ internal fun protoOf(constructor: Any) =
     js("constructor.prototype")
 
 @Suppress("UNUSED_PARAMETER")
-internal fun <T> objectCreate(proto: T?) =
+internal fun <T> objectCreate(proto: T? = null): T =
     js("Object.create(proto)")
 
 @Suppress("UNUSED_PARAMETER")

libraries/stdlib/js/runtime/kotlinJsHacks.kt

@@ -44,16 +44,17 @@ internal fun safePropertySet(self: dynamic, setterName: String, propName: String
 @Target(AnnotationTarget.FUNCTION, AnnotationTarget.PROPERTY_GETTER, AnnotationTarget.PROPERTY_SETTER)
 internal annotation class JsFun(val code: String)
 
-/**
- * The annotation is needed for annotating class declarations and type alias which are used inside exported declarations, but
- * doesn't contain @JsExport annotation
- * This information is used for generating special tagged types inside d.ts files, for more strict usage of implicitly exported entities
- */
-@Target(AnnotationTarget.CLASS)
-internal annotation class JsImplicitExport
 
 /**
  * The annotation is needed for annotating function declarations that should be compiled as ES6 generators
  */
 @Target(AnnotationTarget.FUNCTION)
 internal annotation class JsGenerator
+
+/**
+ * The annotation is needed for annotating class declarations and type alias which are used inside exported declarations, but
+ * doesn't contain @JsExport annotation
+ * This information is used for generating special tagged types inside d.ts files, for more strict usage of implicitly exported entities
+ */
+@Target(AnnotationTarget.CLASS)
+internal annotation class JsImplicitExport(val couldBeConvertedToExplicitExport: Boolean)

libraries/stdlib/js/src/kotlin/collections/ArrayList.kt

@@ -7,6 +7,8 @@
 
 package kotlin.collections
 
+import kotlin.js.collections.JsArray
+
 /**
  * Provides a [MutableList] implementation, which uses a resizable array as its backing storage.
  *
@@ -178,6 +180,10 @@ public actual open class ArrayList<E> internal constructor(private var array: Ar
         return js("[]").slice.call(array)
     }
 
+    @ExperimentalJsExport
+    @ExperimentalJsCollectionsApi
+    @SinceKotlin("1.9")
+    override fun asJsArrayView(): JsArray<E> = array.unsafeCast<JsArray<E>>()
 
     internal override fun checkIsMutable() {
         if (isReadOnly) throw UnsupportedOperationException()

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

@@ -0,0 +1,55 @@
+/*
+ * Copyright 2010-2023 JetBrains s.r.o. and Kotlin Programming Language contributors.
+ * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
+ */
+
+package kotlin.js.collections
+
+
+/**
+ * Exposes the TypeScript [ReadonlyArray](https://www.typescriptlang.org/docs/handbook/2/objects.html#the-readonlyarray-type) to Kotlin.
+ */
+@JsName("ReadonlyArray")
+@SinceKotlin("1.9")
+@ExperimentalJsCollectionsApi
+public external interface JsReadonlyArray<out E>
+
+/**
+ * Exposes the JavaScript [Array](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array) to Kotlin.
+ */
+@JsName("Array")
+@SinceKotlin("1.9")
+@ExperimentalJsCollectionsApi
+public external open class JsArray<E> : JsReadonlyArray<E>
+
+/**
+ * Exposes the TypeScript [ReadonlySet](https://github.com/microsoft/TypeScript/blob/bd952a7a83ce04b3541b952238b6c0e4316b7d5d/src/lib/es2015.collection.d.ts#L103) to Kotlin.
+ */
+@JsName("ReadonlySet")
+@SinceKotlin("1.9")
+@ExperimentalJsCollectionsApi
+public external interface JsReadonlySet<out E>
+
+/**
+ * Exposes the JavaScript [Set](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Set) to Kotlin.
+ */
+@JsName("Set")
+@SinceKotlin("1.9")
+@ExperimentalJsCollectionsApi
+public external open class JsSet<E> : JsReadonlySet<E>
+
+/**
+ * Exposes the TypeScript [ReadonlyMap](https://github.com/microsoft/TypeScript/blob/bd952a7a83ce04b3541b952238b6c0e4316b7d5d/src/lib/es2015.collection.d.ts#L37) to Kotlin.
+ */
+@JsName("ReadonlyMap")
+@SinceKotlin("1.9")
+@ExperimentalJsCollectionsApi
+public external interface JsReadonlyMap<K, out V>
+
+/**
+ * Exposes the JavaScript [Map](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Map) to Kotlin.
+ */
+@JsName("Map")
+@SinceKotlin("1.9")
+@ExperimentalJsCollectionsApi
+public external open class JsMap<K, V> : JsReadonlyMap<K, V>

libraries/tools/binary-compatibility-validator/reference-public-api/kotlin-stdlib-runtime-merged.txt

@@ -3384,6 +3384,9 @@ public final class kotlin/jdk7/AutoCloseableKt {
 	public static final fun closeFinally (Ljava/lang/AutoCloseable;Ljava/lang/Throwable;)V
 }
 
+public abstract interface annotation class kotlin/js/ExperimentalJsCollectionsApi : java/lang/annotation/Annotation {
+}
+
 public abstract interface annotation class kotlin/js/ExperimentalJsExport : java/lang/annotation/Annotation {
 }