[Wasm] Use JsAny, JsHandle and other Js* types in stdlib and kotlin-test

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.

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

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")
+}

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)

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")
+}

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)

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)!!

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?>

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
 
 /**

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")