diff --git a/js/js.tests/test/org/jetbrains/kotlin/js/test/semantics/BoxJsTestGenerated.java b/js/js.tests/test/org/jetbrains/kotlin/js/test/semantics/BoxJsTestGenerated.java
index a038be1d7ab..12f017e1dbe 100644
--- a/js/js.tests/test/org/jetbrains/kotlin/js/test/semantics/BoxJsTestGenerated.java
+++ b/js/js.tests/test/org/jetbrains/kotlin/js/test/semantics/BoxJsTestGenerated.java
@@ -6884,31 +6884,6 @@ public class BoxJsTestGenerated extends AbstractBoxJsTest {
             runTest("js/js.translator/testData/box/reflection/findAssociatedObject_oldBE.kt");
         }
 
-        @TestMetadata("jsClass.kt")
-        public void testJsClass() throws Exception {
-            runTest("js/js.translator/testData/box/reflection/jsClass.kt");
-        }
-
-        @TestMetadata("jsClassName.kt")
-        public void testJsClassName() throws Exception {
-            runTest("js/js.translator/testData/box/reflection/jsClassName.kt");
-        }
-
-        @TestMetadata("jsClassOnReifiedType.kt")
-        public void testJsClassOnReifiedType() throws Exception {
-            runTest("js/js.translator/testData/box/reflection/jsClassOnReifiedType.kt");
-        }
-
-        @TestMetadata("jsClassOnReifiedTypeInLambda.kt")
-        public void testJsClassOnReifiedTypeInLambda() throws Exception {
-            runTest("js/js.translator/testData/box/reflection/jsClassOnReifiedTypeInLambda.kt");
-        }
-
-        @TestMetadata("jsClassSimpleName.kt")
-        public void testJsClassSimpleName() throws Exception {
-            runTest("js/js.translator/testData/box/reflection/jsClassSimpleName.kt");
-        }
-
         @TestMetadata("kClass.kt")
         public void testKClass() throws Exception {
             runTest("js/js.translator/testData/box/reflection/kClass.kt");
diff --git a/js/js.translator/testData/box/reflection/jsClass.kt b/js/js.translator/testData/box/reflection/jsClass.kt
deleted file mode 100644
index 6baed2a73c4..00000000000
--- a/js/js.translator/testData/box/reflection/jsClass.kt
+++ /dev/null
@@ -1,18 +0,0 @@
-// DONT_TARGET_EXACT_BACKEND: JS_IR
-// DONT_TARGET_EXACT_BACKEND: JS_IR_ES6
-// EXPECTED_REACHABLE_NODES: 1322
-package foo
-
-@Suppress("DEPRECATION_ERROR")
-fun box(): String {
-    check(jsClass<A>(), A().jsClass)
-    check(jsClass<B>(), B().jsClass)
-    check(jsClass<O>(), O.jsClass)
-    assertNotEquals(null, jsClass<I>())
-    check(jsClass<E>(), E.X.jsClass)
-    check(jsClass<E>(), E.Y.jsClass, shouldBeEqual = false)
-// TODO uncomment after KT-13338 is fixed
-//    check(jsClass<E>(), E.Z.jsClass)
-
-    return "OK"
-}
diff --git a/js/js.translator/testData/box/reflection/jsClassName.kt b/js/js.translator/testData/box/reflection/jsClassName.kt
deleted file mode 100644
index bff34b766b7..00000000000
--- a/js/js.translator/testData/box/reflection/jsClassName.kt
+++ /dev/null
@@ -1,33 +0,0 @@
-// DONT_TARGET_EXACT_BACKEND: JS_IR
-// DONT_TARGET_EXACT_BACKEND: JS_IR_ES6
-// EXPECTED_REACHABLE_NODES: 1328
-package foo
-
-@Suppress("DEPRECATION_ERROR")
-fun testWithInstance() {
-    assertEquals("A", A().jsClass.name)
-    assertEquals("B", B().jsClass.name)
-    assertEquals("O", O.jsClass.name)
-    assertEquals("E", E.X.jsClass.name)
-    assertEquals("E\$Y", E.Y.jsClass.name)
-// TODO uncomment after KT-13338 is fixed
-//    assertEquals("E", E.Z.jsClass.name)
-    assertEquals("R", R().jsClass.name)
-}
-
-@Suppress("DEPRECATION_ERROR")
-fun testWithClassReference() {
-    assertEquals("A", jsClass<A>().name)
-    assertEquals("B", jsClass<B>().name)
-    assertEquals("O", jsClass<O>().name)
-    assertEquals("I", jsClass<I>().name)
-    assertEquals("E", jsClass<E>().name)
-    assertEquals("R", jsClass<R>().name)
-}
-
-fun box(): String {
-    testWithInstance()
-    testWithClassReference()
-
-    return "OK"
-}
diff --git a/js/js.translator/testData/box/reflection/jsClassOnReifiedType.kt b/js/js.translator/testData/box/reflection/jsClassOnReifiedType.kt
deleted file mode 100644
index b164ded1d62..00000000000
--- a/js/js.translator/testData/box/reflection/jsClassOnReifiedType.kt
+++ /dev/null
@@ -1,20 +0,0 @@
-// DONT_TARGET_EXACT_BACKEND: JS_IR
-// DONT_TARGET_EXACT_BACKEND: JS_IR_ES6
-// EXPECTED_REACHABLE_NODES: 1318
-package foo
-
-@Suppress("DEPRECATION_ERROR")
-inline fun <reified T : Any> foo(): JsClass<T> {
-    val T = 1
-    return jsClass<T>()
-}
-
-@Suppress("DEPRECATION_ERROR")
-fun box(): String {
-    check(jsClass<A>(), foo<A>())
-    check(jsClass<B>(), foo<B>())
-    check(jsClass<O>(), foo<O>())
-    check(jsClass<E>(), foo<E>())
-
-    return "OK"
-}
diff --git a/js/js.translator/testData/box/reflection/jsClassOnReifiedTypeInLambda.kt b/js/js.translator/testData/box/reflection/jsClassOnReifiedTypeInLambda.kt
deleted file mode 100644
index 5118f0b54de..00000000000
--- a/js/js.translator/testData/box/reflection/jsClassOnReifiedTypeInLambda.kt
+++ /dev/null
@@ -1,20 +0,0 @@
-// DONT_TARGET_EXACT_BACKEND: JS_IR
-// DONT_TARGET_EXACT_BACKEND: JS_IR_ES6
-// EXPECTED_REACHABLE_NODES: 1320
-package foo
-
-@Suppress("DEPRECATION_ERROR")
-inline fun <reified T : Any> foo(): () -> JsClass<T> {
-    val T = 1
-    return { jsClass<T>() }
-}
-
-@Suppress("DEPRECATION_ERROR")
-fun box(): String {
-    check(jsClass<A>(), foo<A>()())
-    check(jsClass<B>(), foo<B>()())
-    check(jsClass<O>(), foo<O>()())
-    check(jsClass<E>(), foo<E>()())
-
-    return "OK"
-}
diff --git a/js/js.translator/testData/box/reflection/jsClassSimpleName.kt b/js/js.translator/testData/box/reflection/jsClassSimpleName.kt
deleted file mode 100644
index e721048977a..00000000000
--- a/js/js.translator/testData/box/reflection/jsClassSimpleName.kt
+++ /dev/null
@@ -1,51 +0,0 @@
-// DONT_TARGET_EXACT_BACKEND: JS_IR
-// DONT_TARGET_EXACT_BACKEND: JS_IR_ES6
-// EXPECTED_REACHABLE_NODES: 1331
-package foo
-
-class undefined
-
-class Outer {
-    class Nested
-
-    inner class Inner
-}
-
-@Suppress("DEPRECATION_ERROR")
-fun testWithInstance() {
-    assertEquals("A", A().jsClass.simpleName)
-    assertEquals("B", B().jsClass.simpleName)
-    assertEquals("O", O.jsClass.simpleName)
-    assertEquals("E", E.X.jsClass.simpleName)
-    assertEquals("Y", E.Y.jsClass.simpleName)
-// TODO uncomment after KT-13338 is fixed
-//    assertEquals("E", E.Z.jsClass.simpleName)
-    assertEquals("undefined", undefined().jsClass.simpleName)
-    assertEquals("Nested", Outer.Nested().jsClass.simpleName)
-    assertEquals("Inner", Outer().Inner().jsClass.simpleName)
-}
-
-@Suppress("DEPRECATION_ERROR")
-fun testWithClassReference() {
-    assertEquals("A", jsClass<A>().simpleName)
-    assertEquals("B", jsClass<B>().simpleName)
-    assertEquals("O", jsClass<O>().simpleName)
-    assertEquals("I", jsClass<I>().simpleName)
-    assertEquals("E", jsClass<E>().simpleName)
-    assertEquals("undefined", jsClass<undefined>().simpleName)
-    assertEquals("Nested", jsClass<Outer.Nested>().simpleName)
-    assertEquals("Inner", jsClass<Outer.Inner>().simpleName)
-}
-
-val JsClass<*>.simpleName: String
-    get() {
-        val dynClass: dynamic = this
-        return dynClass.`$metadata$`.simpleName as? String ?: ""
-    }
-
-fun box(): String {
-    testWithInstance()
-    testWithClassReference()
-
-    return "OK"
-}
diff --git a/libraries/stdlib/js-ir/src/kotlin/jsClass_js-ir.kt b/libraries/stdlib/js-ir/src/kotlin/jsClass_js-ir.kt
new file mode 100644
index 00000000000..1524617027c
--- /dev/null
+++ b/libraries/stdlib/js-ir/src/kotlin/jsClass_js-ir.kt
@@ -0,0 +1,8 @@
+/*
+ * Copyright 2010-2020 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
+
+internal external fun <T : Any> jsClass(): JsClass<T>
diff --git a/libraries/stdlib/js/src/kotlin/reflect/JsClass.kt b/libraries/stdlib/js/src/kotlin/reflect/JsClass.kt
index c063f74db70..8dadbfe6817 100644
--- a/libraries/stdlib/js/src/kotlin/reflect/JsClass.kt
+++ b/libraries/stdlib/js/src/kotlin/reflect/JsClass.kt
@@ -1,5 +1,5 @@
 /*
- * Copyright 2010-2018 JetBrains s.r.o. and Kotlin Programming Language contributors.
+ * Copyright 2010-2020 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.
  */
 
@@ -19,18 +19,6 @@ external interface JsClass<T : Any> {
     val name: String
 }
 
-@Deprecated("Use class literal and extension property `js` instead.", replaceWith = ReplaceWith("T::class.js"), level = DeprecationLevel.ERROR)
-external fun <T : Any> jsClass(): JsClass<T>
-
-@Deprecated("Use class literal and extension property `js` instead.", replaceWith = ReplaceWith("this::class.js"), level = DeprecationLevel.ERROR)
-val <T : Any> T.jsClass: JsClass<T>
-    get() = when (jsTypeOf(this)) {
-        "string" -> js("String")
-        "number" -> js("Number")
-        "boolean" -> js("Boolean")
-        else -> js("Object").getPrototypeOf(this).constructor
-    }
-
 /**
  * Obtains a constructor reference for the given `KClass`.
  */