diff --git a/libraries/tools/kotlin-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/targets/js/ir/KotlinBrowserJsIr.kt b/libraries/tools/kotlin-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/targets/js/ir/KotlinBrowserJsIr.kt
index c33cafa9e02..6304ee95bb7 100644
--- a/libraries/tools/kotlin-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/targets/js/ir/KotlinBrowserJsIr.kt
+++ b/libraries/tools/kotlin-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/targets/js/ir/KotlinBrowserJsIr.kt
@@ -16,8 +16,8 @@ import org.jetbrains.kotlin.gradle.targets.js.subtargets.BrowserDistribution
 import org.jetbrains.kotlin.gradle.targets.js.testing.KotlinJsTest
 import org.jetbrains.kotlin.gradle.targets.js.webpack.KotlinWebpack
 import org.jetbrains.kotlin.gradle.targets.js.webpack.KotlinWebpackConfig
-import org.jetbrains.kotlin.gradle.targets.js.webpack.KotlinWebpackConfig.Devtool
 import org.jetbrains.kotlin.gradle.targets.js.webpack.KotlinWebpackConfig.Mode
+import org.jetbrains.kotlin.gradle.targets.js.webpack.WebpackDevtool
 import org.jetbrains.kotlin.gradle.tasks.registerTask
 import javax.inject.Inject
 
@@ -190,8 +190,8 @@ open class KotlinBrowserJsIr @Inject constructor(target: KotlinJsIrTarget) :
 
         devtool = getByKind(
             kind = kind,
-            releaseValue = Devtool.SOURCE_MAP,
-            debugValue = Devtool.EVAL_SOURCE_MAP
+            releaseValue = WebpackDevtool.SOURCE_MAP,
+            debugValue = WebpackDevtool.EVAL_SOURCE_MAP
         )
     }
 
diff --git a/libraries/tools/kotlin-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/targets/js/subtargets/KotlinBrowserJs.kt b/libraries/tools/kotlin-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/targets/js/subtargets/KotlinBrowserJs.kt
index a10b0cfa6a9..0c93311dd99 100644
--- a/libraries/tools/kotlin-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/targets/js/subtargets/KotlinBrowserJs.kt
+++ b/libraries/tools/kotlin-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/targets/js/subtargets/KotlinBrowserJs.kt
@@ -22,8 +22,8 @@ import org.jetbrains.kotlin.gradle.targets.js.npm.npmProject
 import org.jetbrains.kotlin.gradle.targets.js.testing.KotlinJsTest
 import org.jetbrains.kotlin.gradle.targets.js.webpack.KotlinWebpack
 import org.jetbrains.kotlin.gradle.targets.js.webpack.KotlinWebpackConfig
-import org.jetbrains.kotlin.gradle.targets.js.webpack.KotlinWebpackConfig.Devtool
 import org.jetbrains.kotlin.gradle.targets.js.webpack.KotlinWebpackConfig.Mode
+import org.jetbrains.kotlin.gradle.targets.js.webpack.WebpackDevtool
 import org.jetbrains.kotlin.gradle.tasks.registerTask
 import org.jetbrains.kotlin.gradle.utils.lowerCamelCaseName
 import java.io.File
@@ -269,8 +269,8 @@ open class KotlinBrowserJs @Inject constructor(target: KotlinJsTarget) :
 
         devtool = getByKind(
             kind = kind,
-            releaseValue = Devtool.SOURCE_MAP,
-            debugValue = Devtool.EVAL_SOURCE_MAP
+            releaseValue = WebpackDevtool.SOURCE_MAP,
+            debugValue = WebpackDevtool.EVAL_SOURCE_MAP
         )
     }
 
diff --git a/libraries/tools/kotlin-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/targets/js/webpack/KotlinWebpack.kt b/libraries/tools/kotlin-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/targets/js/webpack/KotlinWebpack.kt
index 80b5483ae7f..eeae9b19d56 100644
--- a/libraries/tools/kotlin-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/targets/js/webpack/KotlinWebpack.kt
+++ b/libraries/tools/kotlin-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/targets/js/webpack/KotlinWebpack.kt
@@ -130,7 +130,7 @@ open class KotlinWebpack : DefaultTask(), RequiresNpmDependencies {
     var devServer: KotlinWebpackConfig.DevServer? = null
 
     @Input
-    var devtool: String = KotlinWebpackConfig.Devtool.EVAL_SOURCE_MAP
+    var devtool: String = WebpackDevtool.EVAL_SOURCE_MAP
 
     private fun createRunner() = KotlinWebpackRunner(
         compilation.npmProject,
diff --git a/libraries/tools/kotlin-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/targets/js/webpack/KotlinWebpackConfig.kt b/libraries/tools/kotlin-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/targets/js/webpack/KotlinWebpackConfig.kt
index 7c990157673..6da41ea2f7e 100644
--- a/libraries/tools/kotlin-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/targets/js/webpack/KotlinWebpackConfig.kt
+++ b/libraries/tools/kotlin-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/targets/js/webpack/KotlinWebpackConfig.kt
@@ -27,7 +27,7 @@ data class KotlinWebpackConfig(
     val bundleAnalyzerReportDir: File? = null,
     val reportEvaluatedConfigFile: File? = null,
     val devServer: DevServer? = null,
-    val devtool: String? = Devtool.EVAL_SOURCE_MAP,
+    val devtool: String? = WebpackDevtool.EVAL_SOURCE_MAP,
     val showProgress: Boolean = false,
     val sourceMaps: Boolean = false,
     val export: Boolean = true,
@@ -79,11 +79,6 @@ data class KotlinWebpackConfig(
         val contentBase: List<String>
     ) : Serializable
 
-    object Devtool {
-        val EVAL_SOURCE_MAP = "eval-source-map"
-        val SOURCE_MAP = "source-map"
-    }
-
     fun save(configFile: File) {
         configFile.writer().use {
             appendTo(it)
diff --git a/libraries/tools/kotlin-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/targets/js/webpack/WebpackDevtool.kt b/libraries/tools/kotlin-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/targets/js/webpack/WebpackDevtool.kt
new file mode 100644
index 00000000000..6e6864f6a43
--- /dev/null
+++ b/libraries/tools/kotlin-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/targets/js/webpack/WebpackDevtool.kt
@@ -0,0 +1,34 @@
+/*
+ * 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 org.jetbrains.kotlin.gradle.targets.js.webpack
+
+object WebpackDevtool {
+    const val EVAL = "eval"
+    const val EVAL_CHEAP_SOURCE_MAP = "eval-cheap-source-map"
+    const val EVAL_CHEAP_MODULE_SOURCE_MAP = "eval-cheap-module-source-map"
+    const val EVAL_SOURCE_MAP = "eval-source-map"
+    const val EVAL_NOSOURCES_SOURCE_MAP = "eval-nosources-source-map"
+    const val EVAL_NOSOURCES_CHEAP_SOURCE_MAP = "eval-nosources-cheap-source-map"
+    const val EVAL_NOSOURCES_CHEAP_MODULE_SOURCE_MAP = "eval-nosources-cheap-module-source-map"
+    const val CHEAP_SOURCE_MAP = "cheap-source-map"
+    const val CHEAP_MODULE_SOURCE_MAP = "cheap-module-source-map"
+    const val INLINE_CHEAP_SOURCE_MAP = "inline-cheap-source-map"
+    const val INLINE_CHEAP_MODULE_SOURCE_MAP = "inline-cheap-module-source-map"
+    const val INLINE_SOURCE_MAP = "inline-source-map"
+    const val INLINE_NOSOURCES_SOURCE_MAP = "inline-nosources-source-map"
+    const val INLINE_NOSOURCES_CHEAP_SOURCE_MAP = "inline-nosources-cheap-source-map"
+    const val INLINE_NOSOURCES_CHEAP_MODULE_SOURCE_MAP = "inline-nosources-cheap-module-source-map"
+    const val SOURCE_MAP = "source-map"
+    const val HIDDEN_SOURCE_MAP = "hidden-source-map"
+    const val HIDDEN_NOSOURCES_SOURCE_MAP = "hidden-nosources-source-map"
+    const val HIDDEN_NOSOURCES_CHEAP_SOURCE_MAP = "hidden-nosources-cheap-source-map"
+    const val HIDDEN_NOSOURCES_CHEAP_MODULE_SOURCE_MAP = "hidden-nosources-cheap-module-source-map"
+    const val HIDDEN_CHEAP_SOURCE_MAP = "hidden-cheap-source-map"
+    const val HIDDEN_CHEAP_MODULE_SOURCE_MAP = "hidden-cheap-module-source-map"
+    const val NOSOURCES_SOURCE_MAP = "nosources-source-map"
+    const val NOSOURCES_CHEAP_SOURCE_MAP = "nosources-cheap-source-map"
+    const val NOSOURCES_CHEAP_MODULE_SOURCE_MAP = "nosources-cheap-module-source-map"
+}
\ No newline at end of file