diff --git a/compiler/ir/backend.wasm/src/org/jetbrains/kotlin/backend/wasm/WasmSymbols.kt b/compiler/ir/backend.wasm/src/org/jetbrains/kotlin/backend/wasm/WasmSymbols.kt
index 636c81c705b..c2371e9b14d 100644
--- a/compiler/ir/backend.wasm/src/org/jetbrains/kotlin/backend/wasm/WasmSymbols.kt
+++ b/compiler/ir/backend.wasm/src/org/jetbrains/kotlin/backend/wasm/WasmSymbols.kt
@@ -290,8 +290,8 @@ class WasmSymbols(
 
     val wasmAnyRefClass = getIrClass(FqName("kotlin.wasm.internal.reftypes.anyref"))
 
-    private val externalInterfaceClass = getIrClass(FqName("kotlin.wasm.internal.ExternalInterfaceType"))
-    val externalInterfaceType by lazy { externalInterfaceClass.defaultType }
+    private val jsAnyClass = getIrClass(FqName("kotlin.js.JsAny"))
+    val jsAnyType by lazy { jsAnyClass.defaultType }
 
     inner class JsInteropAdapters {
         val kotlinToJsStringAdapter = getInternalFunction("kotlinToJsStringAdapter")
diff --git a/compiler/ir/backend.wasm/src/org/jetbrains/kotlin/backend/wasm/lower/JsInteropFunctionsLowering.kt b/compiler/ir/backend.wasm/src/org/jetbrains/kotlin/backend/wasm/lower/JsInteropFunctionsLowering.kt
index 8d1860a4d01..d11c58bf937 100644
--- a/compiler/ir/backend.wasm/src/org/jetbrains/kotlin/backend/wasm/lower/JsInteropFunctionsLowering.kt
+++ b/compiler/ir/backend.wasm/src/org/jetbrains/kotlin/backend/wasm/lower/JsInteropFunctionsLowering.kt
@@ -33,7 +33,6 @@ import org.jetbrains.kotlin.ir.visitors.IrElementTransformerVoid
 import org.jetbrains.kotlin.ir.visitors.transformChildrenVoid
 import org.jetbrains.kotlin.name.Name
 import org.jetbrains.kotlin.util.OperatorNameConventions
-import kotlin.math.absoluteValue
 
 /**
  * Create wrappers for external and @JsExport functions when type adaptation is needed
@@ -466,7 +465,7 @@ class JsInteropFunctionsLowering(val context: WasmBackendContext) : DeclarationT
     private fun createKotlinToJsClosureConvertor(info: FunctionTypeInfo): IrSimpleFunction {
         val result = context.irFactory.buildFun {
             name = Name.identifier("__convertKotlinClosureToJsClosure_${info.hashString}")
-            returnType = context.wasmSymbols.externalInterfaceType
+            returnType = context.wasmSymbols.jsAnyType
             isExternal = true
         }
         result.parent = currentParent
@@ -507,7 +506,7 @@ class JsInteropFunctionsLowering(val context: WasmBackendContext) : DeclarationT
         result.parent = currentParent
         result.addValueParameter {
             name = Name.identifier("f")
-            type = context.wasmSymbols.externalInterfaceType
+            type = context.wasmSymbols.jsAnyType
         }
 
         val closureClass = context.irFactory.buildClass {
@@ -520,7 +519,7 @@ class JsInteropFunctionsLowering(val context: WasmBackendContext) : DeclarationT
 
         val closureClassField = closureClass.addField {
             name = Name.identifier("jsClosure")
-            type = context.wasmSymbols.externalInterfaceType
+            type = context.wasmSymbols.jsAnyType
             visibility = DescriptorVisibilities.PRIVATE
             isFinal = true
         }
@@ -589,7 +588,7 @@ class JsInteropFunctionsLowering(val context: WasmBackendContext) : DeclarationT
         result.parent = currentParent
         result.addValueParameter {
             name = Name.identifier("f")
-            type = symbols.externalInterfaceType
+            type = symbols.jsAnyType
         }
         val arity = info.adaptedParameterTypes.size
         repeat(arity) { paramIndex ->
@@ -790,7 +789,7 @@ class JsInteropFunctionsLowering(val context: WasmBackendContext) : DeclarationT
         private val fromElementType: IrType,
     ) : InteropTypeAdapter {
         override val toType: IrType =
-            context.wasmSymbols.externalInterfaceType
+            context.wasmSymbols.jsAnyType
 
         private val elementAdapter =
             primitivesToExternRefAdapters[fromElementType]
diff --git a/compiler/testData/codegen/boxWasmJsInterop/jsTypes.kt b/compiler/testData/codegen/boxWasmJsInterop/jsTypes.kt
new file mode 100644
index 00000000000..6e75d30168a
--- /dev/null
+++ b/compiler/testData/codegen/boxWasmJsInterop/jsTypes.kt
@@ -0,0 +1,61 @@
+// TARGET_BACKEND: WASM
+// WITH_STDLIB
+import kotlin.test.*
+
+fun jsRepresentation(x: JsAny): String = js("(typeof x) + ':' + String(x)")
+
+fun box(): String {
+    // JsNumber
+    val jsNum10: JsNumber = 10.toJsNumber()
+    val anotherJsNum10: JsNumber = 10.toDouble().toJsNumber()
+    assertTrue(jsNum10 == anotherJsNum10)
+    assertTrue(jsNum10.toDouble() == 10.0)
+    assertTrue(anotherJsNum10.toInt() == 10)
+    val jsNumAsJsAny: JsAny = jsNum10
+    assertTrue(jsNumAsJsAny == anotherJsNum10)
+    assertTrue(jsNumAsJsAny is JsNumber)
+    assertTrue(jsNumAsJsAny !is JsString)
+    assertTrue(jsNumAsJsAny !is JsBoolean)
+    assertTrue((jsNumAsJsAny as JsNumber).toInt() == 10)
+    val jsNumAsAny: Any = jsNum10
+    assertTrue(jsNumAsAny == anotherJsNum10)
+    assertTrue(jsNumAsAny is JsNumber)
+    assertTrue(jsNumAsAny !is JsString)
+    assertTrue(jsNumAsAny !is JsBoolean)
+    assertTrue((jsNumAsAny as JsNumber).toInt() == 10)
+    assertTrue(jsRepresentation(jsNum10) == "number:10")
+
+    // JsString
+    val jsStr1: JsString = "str1".toJsString()
+    assertTrue(jsStr1 == "str1".toJsString())
+    assertTrue(jsStr1 != "str2".toJsString())
+    assertTrue(jsStr1.toString() == "str1")
+    assertTrue((jsStr1 as Any) is JsString)
+    assertTrue((jsStr1 as Any) !is JsNumber)
+    assertTrue(jsRepresentation(jsStr1) == "string:str1")
+
+    // JsString
+    val jsBoolTrue: JsBoolean = true.toJsBoolean()
+    assertTrue(jsBoolTrue == true.toJsBoolean())
+    assertTrue(jsBoolTrue != false.toJsBoolean())
+    assertTrue(jsRepresentation(jsBoolTrue) == "boolean:true")
+
+    // JsArray
+    val jsArray: JsArray<JsString> = JsArray()
+    repeat(3) {
+        jsArray[it] = "element$it".toJsString()
+    }
+    assertTrue(jsArray.length == 3)
+    assertTrue(jsArray[1] == "element1".toJsString())
+    assertTrue(jsRepresentation(jsArray) == "object:element0,element1,element2")
+
+    // JsHandle
+    val jsHandle: JsHandle<Int> = 10.toJsHandle()
+    assertTrue(jsHandle.get() == 10)
+    assertTrue(jsHandle.toJsHandle().get() == jsHandle)
+    val c = listOf(1)
+    assertTrue(c.toJsHandle().get() === c.toJsHandle().get())
+    assertTrue(c.toJsHandle() === c.toJsHandle())
+
+    return "OK"
+}
\ No newline at end of file
diff --git a/libraries/kotlin.test/wasm/src/main/kotlin/kotlin/test/JasmineLikeAdapter.kt b/libraries/kotlin.test/wasm/src/main/kotlin/kotlin/test/JasmineLikeAdapter.kt
index 378b88485dc..822dedc8115 100644
--- a/libraries/kotlin.test/wasm/src/main/kotlin/kotlin/test/JasmineLikeAdapter.kt
+++ b/libraries/kotlin.test/wasm/src/main/kotlin/kotlin/test/JasmineLikeAdapter.kt
@@ -15,10 +15,10 @@ private fun describe(name: String, fn: () -> Unit): Unit =
 private fun xdescribe(name: String, fn: () -> Unit): Unit =
     js("xdescribe(name, fn)")
 
-private fun it(name: String, fn: () -> Any?): Unit =
+private fun it(name: String, fn: () -> JsAny?): Unit =
     js("it(name, fn)")
 
-private fun xit(name: String, fn: () -> Any?): Unit =
+private fun xit(name: String, fn: () -> JsAny?): Unit =
     js("xit(name, fn)")
 
 private fun jsThrow(jsException: Dynamic) {
@@ -45,7 +45,7 @@ internal class JasmineLikeAdapter : FrameworkAdapter {
         }
     }
 
-    private fun callTest(testFn: () -> Any?): Any? =
+    private fun callTest(testFn: () -> Any?): JsAny? =
         try {
             (testFn() as? Promise<*>)?.catch { exception ->
                 val jsException = exception
diff --git a/libraries/stdlib/wasm/internal/kotlin/wasm/internal/ExternalWrapper.kt b/libraries/stdlib/wasm/internal/kotlin/wasm/internal/ExternalWrapper.kt
index fbf62f22fa3..6939d341929 100644
--- a/libraries/stdlib/wasm/internal/kotlin/wasm/internal/ExternalWrapper.kt
+++ b/libraries/stdlib/wasm/internal/kotlin/wasm/internal/ExternalWrapper.kt
@@ -11,7 +11,7 @@ import kotlin.wasm.internal.reftypes.anyref
 import kotlin.wasm.unsafe.withScopedMemoryAllocator
 import kotlin.wasm.unsafe.UnsafeWasmMemoryApi
 
-internal external interface ExternalInterfaceType
+internal typealias ExternalInterfaceType = JsAny
 
 internal class JsExternalBox @WasmPrimitiveConstructor constructor(val ref: ExternalInterfaceType) {
     override fun toString(): String =
@@ -106,7 +106,7 @@ private fun externrefToFloat(ref: ExternalInterfaceType): Float =
 private fun externrefToDouble(ref: ExternalInterfaceType): Double =
     js("Number(ref)")
 
-private fun intToExternref(x: Int): ExternalInterfaceType =
+private fun intToExternref(x: Int): JsNumber =
     js("x")
 
 private fun longToExternref(x: Long): ExternalInterfaceType =
@@ -118,13 +118,16 @@ private fun booleanToExternref(x: Boolean): ExternalInterfaceType =
 private fun floatToExternref(x: Float): ExternalInterfaceType =
     js("x")
 
-private fun doubleToExternref(x: Double): ExternalInterfaceType =
+private fun doubleToExternref(x: Double): JsNumber =
     js("x")
 
 private fun externrefEquals(lhs: ExternalInterfaceType, rhs: ExternalInterfaceType): Boolean =
     js("lhs === rhs")
 
-private external fun tryGetOrSetExternrefBox(ref: ExternalInterfaceType, ifNotCached: JsExternalBox): JsExternalBox?
+private external fun tryGetOrSetExternrefBox(
+    ref: ExternalInterfaceType,
+    ifNotCached: JsHandle<JsExternalBox>
+): JsHandle<JsExternalBox>?
 
 @WasmNoOpCast
 @Suppress("unused")
@@ -171,7 +174,7 @@ internal fun externRefToAny(ref: ExternalInterfaceType): Any? {
     // If we have Null in notNullRef -- return null
     // If we already have a box -- return it,
     // otherwise -- remember new box and return it.
-    return tryGetOrSetExternrefBox(ref, JsExternalBox(ref))
+    return tryGetOrSetExternrefBox(ref, JsExternalBox(ref).toJsHandle())
 }
 
 
@@ -187,7 +190,7 @@ internal fun stringLength(x: ExternalInterfaceType): Int =
 
 // kotlin string to js string export
 // TODO Uint16Array may work with byte endian different with Wasm (i.e. little endian)
-internal fun importStringFromWasm(address: Int, length: Int, prefix: ExternalInterfaceType?): ExternalInterfaceType {
+internal fun importStringFromWasm(address: Int, length: Int, prefix: ExternalInterfaceType?): JsString {
     js("""
     const mem16 = new Uint16Array(wasmExports.memory.buffer, address, length);
     const str = String.fromCharCode.apply(null, mem16);
@@ -195,7 +198,7 @@ internal fun importStringFromWasm(address: Int, length: Int, prefix: ExternalInt
     """)
 }
 
-internal fun kotlinToJsStringAdapter(x: String?): ExternalInterfaceType? {
+internal fun kotlinToJsStringAdapter(x: String?): JsString? {
     // Using nullable String to represent default value
     // for parameters with default values
     if (x == null) return null
@@ -269,13 +272,13 @@ internal fun jsToKotlinStringAdapter(x: ExternalInterfaceType): String {
 }
 
 
-private fun getJsEmptyString(): ExternalInterfaceType =
+private fun getJsEmptyString(): JsString =
     js("''")
 
-private fun getJsTrue(): ExternalInterfaceType =
+private fun getJsTrue(): JsBoolean =
     js("true")
 
-private fun getJsFalse(): ExternalInterfaceType =
+private fun getJsFalse(): JsBoolean =
     js("false")
 
 private val jsEmptyString by lazy(::getJsEmptyString)
@@ -310,11 +313,10 @@ internal fun externRefToKotlinFloatAdapter(x: ExternalInterfaceType): Float =
 internal fun externRefToKotlinDoubleAdapter(x: ExternalInterfaceType): Double =
     externrefToDouble(x)
 
-
-internal fun kotlinIntToExternRefAdapter(x: Int): ExternalInterfaceType =
+internal fun kotlinIntToExternRefAdapter(x: Int): JsNumber =
     intToExternref(x)
 
-internal fun kotlinBooleanToExternRefAdapter(x: Boolean): ExternalInterfaceType =
+internal fun kotlinBooleanToExternRefAdapter(x: Boolean): JsBoolean =
     if (x) jsTrue else jsFalse
 
 internal fun kotlinLongToExternRefAdapter(x: Long): ExternalInterfaceType =
@@ -323,7 +325,7 @@ internal fun kotlinLongToExternRefAdapter(x: Long): ExternalInterfaceType =
 internal fun kotlinFloatToExternRefAdapter(x: Float): ExternalInterfaceType =
     floatToExternref(x)
 
-internal fun kotlinDoubleToExternRefAdapter(x: Double): ExternalInterfaceType =
+internal fun kotlinDoubleToExternRefAdapter(x: Double): JsNumber =
     doubleToExternref(x)
 
 internal fun kotlinByteToExternRefAdapter(x: Byte): ExternalInterfaceType =
diff --git a/libraries/stdlib/wasm/internal/kotlin/wasm/internal/WasmInstructions.kt b/libraries/stdlib/wasm/internal/kotlin/wasm/internal/WasmInstructions.kt
index 06db2218dd3..a7d68896543 100644
--- a/libraries/stdlib/wasm/internal/kotlin/wasm/internal/WasmInstructions.kt
+++ b/libraries/stdlib/wasm/internal/kotlin/wasm/internal/WasmInstructions.kt
@@ -295,10 +295,12 @@ internal external fun wasm_f32_truncate(a: Float): Float
 internal external fun wasm_f32_abs(a: Float): Float
 
 @WasmOp(WasmOp.REF_IS_NULL)
-internal external fun wasm_ref_is_null(a: Any?): Boolean
+internal fun wasm_ref_is_null(a: Any?): Boolean =
+    implementedAsIntrinsic
 
 @WasmOp(WasmOp.REF_EQ)
-internal external fun wasm_ref_eq(a: Any?, b: Any?): Boolean
+internal fun wasm_ref_eq(a: Any?, b: Any?): Boolean =
+    implementedAsIntrinsic
 
 // ---
 
diff --git a/libraries/stdlib/wasm/src/kotlin/Dynamic.kt b/libraries/stdlib/wasm/src/kotlin/Dynamic.kt
index b19d02f93fb..1701737d547 100644
--- a/libraries/stdlib/wasm/src/kotlin/Dynamic.kt
+++ b/libraries/stdlib/wasm/src/kotlin/Dynamic.kt
@@ -152,7 +152,7 @@ internal fun <T> Dynamic.getAny(index: Int): T? = dynamicGetAny(this, index.toSt
 /**
  * Represents unversal type for JS interoperability.
  */
-external interface Dynamic
+external interface Dynamic : JsAny
 
 /**
  * Reinterprets this value as a value of the Dynamic type.
diff --git a/libraries/stdlib/wasm/src/kotlin/js/JsAny.kt b/libraries/stdlib/wasm/src/kotlin/js/JsAny.kt
new file mode 100644
index 00000000000..748c8d5f3f0
--- /dev/null
+++ b/libraries/stdlib/wasm/src/kotlin/js/JsAny.kt
@@ -0,0 +1,11 @@
+/*
+ * 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
+
+/**
+ * Any JavaScript value except null or undefined
+ */
+public external interface JsAny
\ No newline at end of file
diff --git a/libraries/stdlib/wasm/src/kotlin/js/JsArray.kt b/libraries/stdlib/wasm/src/kotlin/js/JsArray.kt
new file mode 100644
index 00000000000..f1cfb0f9f0d
--- /dev/null
+++ b/libraries/stdlib/wasm/src/kotlin/js/JsArray.kt
@@ -0,0 +1,28 @@
+/*
+ * 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
+
+/** JavaScript Array */
+@JsName("Array")
+public external class JsArray<T : JsAny?> : JsAny {
+    val length: Int
+}
+
+public operator fun <T : JsAny?> JsArray<T>.get(index: Int): T? =
+    jsArrayGet(this, index)
+
+public operator fun <T : JsAny?> JsArray<T>.set(index: Int, value: T) {
+    jsArraySet(this, index, value)
+}
+
+@Suppress("RedundantNullableReturnType", "UNUSED_PARAMETER")
+private fun <T : JsAny?> jsArrayGet(array: JsArray<T>, index: Int): T? =
+    js("array[index]")
+
+@Suppress("UNUSED_PARAMETER")
+private fun <T : JsAny?> jsArraySet(array: JsArray<T>, index: Int, value: T) {
+    js("array[index] = value")
+}
\ No newline at end of file
diff --git a/libraries/stdlib/wasm/src/kotlin/js/JsBoolean.kt b/libraries/stdlib/wasm/src/kotlin/js/JsBoolean.kt
new file mode 100644
index 00000000000..b3b6e3642b1
--- /dev/null
+++ b/libraries/stdlib/wasm/src/kotlin/js/JsBoolean.kt
@@ -0,0 +1,20 @@
+/*
+ * 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
+
+import kotlin.wasm.internal.JsPrimitive
+import kotlin.wasm.internal.externRefToKotlinBooleanAdapter
+import kotlin.wasm.internal.kotlinBooleanToExternRefAdapter
+
+/** JavaScript primitive boolean */
+@JsPrimitive("boolean")
+public external class JsBoolean internal constructor() : JsAny
+
+public fun JsBoolean.toBoolean(): Boolean =
+    externRefToKotlinBooleanAdapter(this)
+
+public fun Boolean.toJsBoolean(): JsBoolean =
+    kotlinBooleanToExternRefAdapter(this)
\ No newline at end of file
diff --git a/libraries/stdlib/wasm/src/kotlin/js/JsHandle.kt b/libraries/stdlib/wasm/src/kotlin/js/JsHandle.kt
new file mode 100644
index 00000000000..62595c919f4
--- /dev/null
+++ b/libraries/stdlib/wasm/src/kotlin/js/JsHandle.kt
@@ -0,0 +1,29 @@
+/*
+ * 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
+
+import kotlin.wasm.internal.WasmOp
+import kotlin.wasm.internal.implementedAsIntrinsic
+import kotlin.wasm.internal.returnArgumentIfItIsKotlinAny
+
+/**
+ * JavaScript value that can serve as a handle for any Kotlin value.
+ *
+ * In JavaScript, it behaves like an immutable empty object with a null prototype.
+ * When passed back to Kotlin/Wasm, the original value can be retrieved using the [get] method.
+ */
+@Suppress("WRONG_JS_INTEROP_TYPE")  // Exception to the rule
+public sealed external interface JsHandle<out T : Any> : JsAny
+
+@WasmOp(WasmOp.EXTERN_EXTERNALIZE)
+public fun <T : Any> T.toJsHandle(): JsHandle<T> =
+    implementedAsIntrinsic
+
+/** Retrieve original Kotlin value from JsHandle */
+public fun <T : Any> JsHandle<T>.get(): T {
+    returnArgumentIfItIsKotlinAny(this)
+    throw ClassCastException("JsHandle doesn't contain a Kotlin type")
+}
\ No newline at end of file
diff --git a/libraries/stdlib/wasm/src/kotlin/js/JsNumber.kt b/libraries/stdlib/wasm/src/kotlin/js/JsNumber.kt
new file mode 100644
index 00000000000..98e9a2ad829
--- /dev/null
+++ b/libraries/stdlib/wasm/src/kotlin/js/JsNumber.kt
@@ -0,0 +1,28 @@
+/*
+ * 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
+
+import kotlin.wasm.internal.JsPrimitive
+import kotlin.wasm.internal.externRefToKotlinDoubleAdapter
+import kotlin.wasm.internal.externRefToKotlinIntAdapter
+import kotlin.wasm.internal.kotlinDoubleToExternRefAdapter
+import kotlin.wasm.internal.kotlinIntToExternRefAdapter
+
+/** JavaScript primitive number */
+@JsPrimitive("number")
+public external class JsNumber internal constructor() : JsAny
+
+public fun JsNumber.toDouble(): Double =
+    externRefToKotlinDoubleAdapter(this)
+
+public fun Double.toJsNumber(): JsNumber =
+    kotlinDoubleToExternRefAdapter(this)
+
+public fun JsNumber.toInt(): Int =
+    externRefToKotlinIntAdapter(this)
+
+public fun Int.toJsNumber(): JsNumber =
+    kotlinIntToExternRefAdapter(this)
\ No newline at end of file
diff --git a/libraries/stdlib/wasm/src/kotlin/js/JsString.kt b/libraries/stdlib/wasm/src/kotlin/js/JsString.kt
new file mode 100644
index 00000000000..103eea1b778
--- /dev/null
+++ b/libraries/stdlib/wasm/src/kotlin/js/JsString.kt
@@ -0,0 +1,16 @@
+/*
+ * 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
+
+import kotlin.wasm.internal.JsPrimitive
+import kotlin.wasm.internal.kotlinToJsStringAdapter
+
+/** JavaScript primitive string */
+@JsPrimitive("string")
+public external class JsString internal constructor() : JsAny
+
+public fun String.toJsString(): JsString =
+    kotlinToJsStringAdapter(this)!!
\ No newline at end of file
diff --git a/libraries/stdlib/wasm/src/kotlin/js/Promise.kt b/libraries/stdlib/wasm/src/kotlin/js/Promise.kt
index a44b4907786..27a83e52e2a 100644
--- a/libraries/stdlib/wasm/src/kotlin/js/Promise.kt
+++ b/libraries/stdlib/wasm/src/kotlin/js/Promise.kt
@@ -8,7 +8,7 @@ package kotlin.js
 /**
  * Exposes the JavaScript [Promise object](https://developer.mozilla.org/en/docs/Web/JavaScript/Reference/Global_Objects/Promise) to Kotlin.
  */
-public external class Promise<out T>(executor: (resolve: (Dynamic?) -> Unit, reject: (Dynamic) -> Unit) -> Unit) {
+public external class Promise<out T : JsAny?>(executor: (resolve: (Dynamic?) -> Unit, reject: (Dynamic) -> Unit) -> Unit) : JsAny {
     public fun then(onFulfilled: (Dynamic?) -> Dynamic?): Promise<Dynamic?>
     public fun then(onFulfilled: (Dynamic?) -> Dynamic?, onRejected: (Dynamic) -> Dynamic?): Promise<Dynamic?>
     public fun catch(onRejected: (Dynamic) -> Dynamic?): Promise<Dynamic?>
diff --git a/libraries/stdlib/wasm/src/kotlin/js/core.kt b/libraries/stdlib/wasm/src/kotlin/js/core.kt
index 760185a7c8c..78a2a7d05af 100644
--- a/libraries/stdlib/wasm/src/kotlin/js/core.kt
+++ b/libraries/stdlib/wasm/src/kotlin/js/core.kt
@@ -34,6 +34,7 @@ import kotlin.wasm.internal.ExcludedFromCodegen
  * ```
  */
 @ExcludedFromCodegen
+@Suppress("WRONG_JS_INTEROP_TYPE")
 public external val definedExternally: Nothing
 
 /**
diff --git a/libraries/stdlib/wasm/src/kotlinx/dom/ItemArrayLike.kt b/libraries/stdlib/wasm/src/kotlinx/dom/ItemArrayLike.kt
index 696a800f4a4..165dca7044b 100644
--- a/libraries/stdlib/wasm/src/kotlinx/dom/ItemArrayLike.kt
+++ b/libraries/stdlib/wasm/src/kotlinx/dom/ItemArrayLike.kt
@@ -5,12 +5,12 @@
 
 package org.w3c.dom
 
-public external interface ItemArrayLike<out T> {
+public external interface ItemArrayLike<out T : JsAny?> : JsAny {
     val length: Int
     fun item(index: Int): T?
 }
 
-public fun <T> ItemArrayLike<T>.asList(): List<T> = object : AbstractList<T>() {
+public fun <T : JsAny?> ItemArrayLike<T>.asList(): List<T> = object : AbstractList<T>() {
     override val size: Int get() = this@asList.length
 
     @Suppress("UNCHECKED_CAST")
diff --git a/wasm/wasm.tests/tests-gen/org/jetbrains/kotlin/wasm/test/IrCodegenWasmJsInteropWasmTestGenerated.java b/wasm/wasm.tests/tests-gen/org/jetbrains/kotlin/wasm/test/IrCodegenWasmJsInteropWasmTestGenerated.java
index b4b770065ad..d7e6dd2502f 100644
--- a/wasm/wasm.tests/tests-gen/org/jetbrains/kotlin/wasm/test/IrCodegenWasmJsInteropWasmTestGenerated.java
+++ b/wasm/wasm.tests/tests-gen/org/jetbrains/kotlin/wasm/test/IrCodegenWasmJsInteropWasmTestGenerated.java
@@ -95,6 +95,11 @@ public class IrCodegenWasmJsInteropWasmTestGenerated extends AbstractIrCodegenWa
         runTest("compiler/testData/codegen/boxWasmJsInterop/jsToKotlinAdapters.kt");
     }
 
+    @TestMetadata("jsTypes.kt")
+    public void testJsTypes() throws Exception {
+        runTest("compiler/testData/codegen/boxWasmJsInterop/jsTypes.kt");
+    }
+
     @TestMetadata("kotlinToJsAdapters.kt")
     public void testKotlinToJsAdapters() throws Exception {
         runTest("compiler/testData/codegen/boxWasmJsInterop/kotlinToJsAdapters.kt");