[K/JS] Use intrinsics instead of new functions in IR backend.

libraries/stdlib/js-ir/runtime/jsIntrinsics.kt

@@ -117,6 +117,10 @@ internal fun jsBitShiftL(a: Any?, b: Any?): Int
 @JsIntrinsic
 internal fun jsInstanceOfIntrinsic(a: Any?, b: Any?): Boolean
 
+// @JsIntrinsic
+//  To prevent people to insert @OptIn every time
+public external fun jsTypeOf(a: Any?): String
+
 @JsIntrinsic
 internal fun jsNewTarget(a: Any?): Any?
 
@@ -216,4 +220,4 @@ internal fun <reified T : Any> jsClassIntrinsic(): JsClass<T>
 internal fun jsInIntrinsic(lhs: Any?, rhs: Any): Boolean
 
 @JsIntrinsic
-internal fun jsDelete(e: Any?)
+internal fun jsDelete(e: Any?)

libraries/stdlib/js-ir/runtime/runtimeForStdLib.kt

@@ -0,0 +1,26 @@
+/*
+ * Copyright 2010-2022 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
+
+// Inlined intrinsics for backward compatibility with already implemented functions in stdlib for old JS backend
+@OptIn(JsIntrinsic::class)
+@kotlin.internal.InlineOnly
+internal inline fun jsDeleteProperty(obj: dynamic, property: Any) = jsDelete(obj[property])
+
+@OptIn(JsIntrinsic::class)
+@kotlin.internal.InlineOnly
+internal inline fun jsBitwiseOr(lhs: Any?, rhs: Any?): Int = jsBitOr(lhs, rhs)
+
+@OptIn(JsIntrinsic::class)
+@kotlin.internal.InlineOnly
+internal inline fun jsBitwiseAnd(lhs: Any?, rhs: Any?): Int = jsBitAnd(lhs, rhs)
+
+@OptIn(JsIntrinsic::class)
+@kotlin.internal.InlineOnly
+internal inline fun jsInstanceOf(obj: Any?, jsClass: Any?): Boolean = jsInstanceOfIntrinsic(obj, jsClass)
+
+@OptIn(JsIntrinsic::class)
+@kotlin.internal.InlineOnly
+internal inline fun jsIn(lhs: Any?, rhs: Any): Boolean = jsInIntrinsic(lhs, rhs)