diff --git a/js/js.tests/test-gen/org/jetbrains/kotlin/js/test/es6/semantics/IrBoxJsES6TestGenerated.java b/js/js.tests/test-gen/org/jetbrains/kotlin/js/test/es6/semantics/IrBoxJsES6TestGenerated.java
index 72847fb334f..4c043c4bc37 100644
--- a/js/js.tests/test-gen/org/jetbrains/kotlin/js/test/es6/semantics/IrBoxJsES6TestGenerated.java
+++ b/js/js.tests/test-gen/org/jetbrains/kotlin/js/test/es6/semantics/IrBoxJsES6TestGenerated.java
@@ -7840,4 +7840,27 @@ public class IrBoxJsES6TestGenerated extends AbstractIrBoxJsES6Test {
             runTest("js/js.translator/testData/box/trait/traitExtendsTwoTraits.kt");
         }
     }
+
+    @TestMetadata("js/js.translator/testData/box/vararg")
+    @TestDataPath("$PROJECT_ROOT")
+    @RunWith(JUnit3RunnerWithInners.class)
+    public static class Vararg extends AbstractIrBoxJsES6Test {
+        private void runTest(String testDataFilePath) throws Exception {
+            KotlinTestUtils.runTest0(this::doTest, TargetBackend.JS_IR_ES6, testDataFilePath);
+        }
+
+        public void testAllFilesPresentInVararg() throws Exception {
+            KotlinTestUtils.assertAllTestsPresentByMetadataWithExcluded(this.getClass(), new File("js/js.translator/testData/box/vararg"), Pattern.compile("^([^_](.+))\\.kt$"), null, TargetBackend.JS_IR_ES6, true);
+        }
+
+        @TestMetadata("jsExternalVarargCtor.kt")
+        public void testJsExternalVarargCtor() throws Exception {
+            runTest("js/js.translator/testData/box/vararg/jsExternalVarargCtor.kt");
+        }
+
+        @TestMetadata("jsExternalVarargFun.kt")
+        public void testJsExternalVarargFun() throws Exception {
+            runTest("js/js.translator/testData/box/vararg/jsExternalVarargFun.kt");
+        }
+    }
 }
diff --git a/js/js.tests/test-gen/org/jetbrains/kotlin/js/test/ir/semantics/IrBoxJsTestGenerated.java b/js/js.tests/test-gen/org/jetbrains/kotlin/js/test/ir/semantics/IrBoxJsTestGenerated.java
index 61cbddedf67..b11a56171c3 100644
--- a/js/js.tests/test-gen/org/jetbrains/kotlin/js/test/ir/semantics/IrBoxJsTestGenerated.java
+++ b/js/js.tests/test-gen/org/jetbrains/kotlin/js/test/ir/semantics/IrBoxJsTestGenerated.java
@@ -7840,4 +7840,27 @@ public class IrBoxJsTestGenerated extends AbstractIrBoxJsTest {
             runTest("js/js.translator/testData/box/trait/traitExtendsTwoTraits.kt");
         }
     }
+
+    @TestMetadata("js/js.translator/testData/box/vararg")
+    @TestDataPath("$PROJECT_ROOT")
+    @RunWith(JUnit3RunnerWithInners.class)
+    public static class Vararg extends AbstractIrBoxJsTest {
+        private void runTest(String testDataFilePath) throws Exception {
+            KotlinTestUtils.runTest0(this::doTest, TargetBackend.JS_IR, testDataFilePath);
+        }
+
+        public void testAllFilesPresentInVararg() throws Exception {
+            KotlinTestUtils.assertAllTestsPresentByMetadataWithExcluded(this.getClass(), new File("js/js.translator/testData/box/vararg"), Pattern.compile("^([^_](.+))\\.kt$"), null, TargetBackend.JS_IR, true);
+        }
+
+        @TestMetadata("jsExternalVarargCtor.kt")
+        public void testJsExternalVarargCtor() throws Exception {
+            runTest("js/js.translator/testData/box/vararg/jsExternalVarargCtor.kt");
+        }
+
+        @TestMetadata("jsExternalVarargFun.kt")
+        public void testJsExternalVarargFun() throws Exception {
+            runTest("js/js.translator/testData/box/vararg/jsExternalVarargFun.kt");
+        }
+    }
 }
diff --git a/js/js.tests/test-gen/org/jetbrains/kotlin/js/test/semantics/BoxJsTestGenerated.java b/js/js.tests/test-gen/org/jetbrains/kotlin/js/test/semantics/BoxJsTestGenerated.java
index 6a78d1ee0e5..c70a9f1fb0c 100644
--- a/js/js.tests/test-gen/org/jetbrains/kotlin/js/test/semantics/BoxJsTestGenerated.java
+++ b/js/js.tests/test-gen/org/jetbrains/kotlin/js/test/semantics/BoxJsTestGenerated.java
@@ -7870,4 +7870,27 @@ public class BoxJsTestGenerated extends AbstractBoxJsTest {
             runTest("js/js.translator/testData/box/trait/traitExtendsTwoTraits.kt");
         }
     }
+
+    @TestMetadata("js/js.translator/testData/box/vararg")
+    @TestDataPath("$PROJECT_ROOT")
+    @RunWith(JUnit3RunnerWithInners.class)
+    public static class Vararg extends AbstractBoxJsTest {
+        private void runTest(String testDataFilePath) throws Exception {
+            KotlinTestUtils.runTest0(this::doTest, TargetBackend.JS, testDataFilePath);
+        }
+
+        public void testAllFilesPresentInVararg() throws Exception {
+            KotlinTestUtils.assertAllTestsPresentByMetadataWithExcluded(this.getClass(), new File("js/js.translator/testData/box/vararg"), Pattern.compile("^([^_](.+))\\.kt$"), null, TargetBackend.JS, true);
+        }
+
+        @TestMetadata("jsExternalVarargCtor.kt")
+        public void testJsExternalVarargCtor() throws Exception {
+            runTest("js/js.translator/testData/box/vararg/jsExternalVarargCtor.kt");
+        }
+
+        @TestMetadata("jsExternalVarargFun.kt")
+        public void testJsExternalVarargFun() throws Exception {
+            runTest("js/js.translator/testData/box/vararg/jsExternalVarargFun.kt");
+        }
+    }
 }
diff --git a/js/js.translator/testData/box/vararg/jsExternalVarargCtor.kt b/js/js.translator/testData/box/vararg/jsExternalVarargCtor.kt
new file mode 100644
index 00000000000..2c392729d0f
--- /dev/null
+++ b/js/js.translator/testData/box/vararg/jsExternalVarargCtor.kt
@@ -0,0 +1,67 @@
+// IGNORE_BACKEND: JS
+
+//KT-42357
+
+// FILE: main.kt
+external class FieldPath {
+    constructor(
+        arg: Int = definedExternally,
+        vararg args: String
+    )
+
+    constructor(
+        arg: Int = definedExternally,
+        vararg args: String,
+        o: Long
+    )
+}
+
+external val ctorCallArgs: Array<String>
+
+fun box(): String {
+    FieldPath()
+    if (ctorCallArgs.size != 0) return "fail: $ctorCallArgs arguments"
+
+    FieldPath(1)
+    if (ctorCallArgs.size != 1 || js("typeof ctorCallArgs[0] !== 'number'")) return "fail1: $ctorCallArgs arguments"
+
+    FieldPath(2, "p0", "p1", "p3")
+    if (ctorCallArgs.size != 4 || js("typeof ctorCallArgs[0] !== 'number'") || js("typeof ctorCallArgs[1] !== 'string'"))
+        return "fail2: $ctorCallArgs arguments"
+
+    FieldPath(3, args = arrayOf("p0", "p1"))
+    if (ctorCallArgs.size != 3 || js("typeof ctorCallArgs[0] !== 'number'") || js("typeof ctorCallArgs[1] !== 'string'"))
+        return "fail3: $ctorCallArgs arguments"
+
+    FieldPath(4, *arrayOf("p0", "p1"))
+    if (ctorCallArgs.size != 3 || js("typeof ctorCallArgs[0] !== 'number'") || js("typeof ctorCallArgs[1] !== 'string'"))
+        return "fail4: $ctorCallArgs arguments"
+
+    FieldPath(5, args = *arrayOf("p0", "p1"))
+    if (ctorCallArgs.size != 3 || js("typeof ctorCallArgs[0] !== 'number'") || js("typeof ctorCallArgs[1] !== 'string'"))
+        return "fail5: $ctorCallArgs arguments"
+
+    FieldPath(42, "a", "b", "c", o = 99L)
+    if (ctorCallArgs.size != 5 || js("typeof ctorCallArgs[0] !== 'number'") || js("typeof ctorCallArgs[1] !== 'string'"))
+        return "fail6: $ctorCallArgs arguments"
+
+    FieldPath(5, args = *arrayOf("p0", "p1"), o = 87L)
+    if (ctorCallArgs.size != 4 || js("typeof ctorCallArgs[0] !== 'number'") || js("typeof ctorCallArgs[1] !== 'string'"))
+        return "fail6: $ctorCallArgs arguments"
+
+    FieldPath(4, *arrayOf("p0", "p1"), o = 99L)
+    if (ctorCallArgs.size != 4 || js("typeof ctorCallArgs[0] !== 'number'") || js("typeof ctorCallArgs[1] !== 'string'"))
+        return "fail7: $ctorCallArgs arguments"
+
+    FieldPath(11, *arrayOf(), o = 123456L)
+    if (ctorCallArgs.size != 2 || js("typeof ctorCallArgs[0] !== 'number'"))
+        return "fail9: $ctorCallArgs arguments"
+
+    return "OK"
+}
+
+// FILE: main.js
+var ctorCallArgs;
+function FieldPath() {
+    ctorCallArgs = arguments;
+}
\ No newline at end of file
diff --git a/js/js.translator/testData/box/vararg/jsExternalVarargFun.kt b/js/js.translator/testData/box/vararg/jsExternalVarargFun.kt
new file mode 100644
index 00000000000..ac5ab0cc284
--- /dev/null
+++ b/js/js.translator/testData/box/vararg/jsExternalVarargFun.kt
@@ -0,0 +1,61 @@
+//KT-42357
+
+// FILE: main.kt
+external fun create(
+    arg: Int = definedExternally,
+    vararg args: String
+) : Array<String>
+
+external fun create(
+    arg: Int = definedExternally,
+    vararg args: String,
+    o: Long
+) : Array<String>
+
+fun box(): String {
+    val zeroArgs = create()
+    if (zeroArgs.size != 0) return "fail: $zeroArgs arguments"
+
+    val oneArg = create(1)
+    if (oneArg.size != 1 || js("typeof oneArg[0] !== 'number'"))
+        return "fail1: $oneArg arguments"
+
+    val varArgs = create(2, "p0", "p1", "p3")
+    if (varArgs.size != 4 || js("typeof varArgs[0] !== 'number'") || js("typeof varArgs[1] !== 'string'"))
+        return "fail2: $varArgs arguments"
+
+    val namedParameter = create(3, args = arrayOf("p0", "p1"))
+    if (namedParameter.size != 3 || js("typeof namedParameter[0] !== 'number'") || js("typeof namedParameter[1] !== 'string'"))
+        return "fail3: $namedParameter arguments"
+
+    val spreadArgs = create(4, *arrayOf("p0", "p1"))
+    if (spreadArgs.size != 3 || js("typeof spreadArgs[0] !== 'number'") || js("typeof spreadArgs[1] !== 'string'"))
+        return "fail4: $spreadArgs arguments"
+
+    val spreadNamedArgs = create(5, args = *arrayOf("p0", "p1"))
+    if (spreadNamedArgs.size != 3 || js("typeof spreadNamedArgs[0] !== 'number'") || js("typeof spreadNamedArgs[1] !== 'string'"))
+        return "fail5: $spreadNamedArgs arguments"
+
+    val argAfterVararg = create(42, "a", "b", "c", o = 99L)
+    if (argAfterVararg.size != 5 || js("typeof argAfterVararg[0] !== 'number'") || js("typeof argAfterVararg[1] !== 'string'"))
+        return "fail6: $argAfterVararg arguments"
+
+    val argAfterSpreadNamedVararg = create(5, args = *arrayOf("p0", "p1"), o = 87L)
+    if (argAfterSpreadNamedVararg.size != 4 || js("typeof argAfterSpreadNamedVararg[0] !== 'number'") || js("typeof argAfterSpreadNamedVararg[1] !== 'string'"))
+        return "fail7: $argAfterSpreadNamedVararg arguments"
+
+    val argAfterSpreadVararg = create(4, *arrayOf("p0", "p1"), o = 99L)
+    if (argAfterSpreadVararg.size != 4 || js("typeof argAfterSpreadVararg[0] !== 'number'") || js("typeof argAfterSpreadVararg[1] !== 'string'"))
+        return "fail8: $argAfterSpreadVararg arguments"
+
+    val argAfterSpreadEmptyVararg = create(11, *arrayOf(), o = 123456L)
+    if (argAfterSpreadEmptyVararg.size != 2 || js("typeof argAfterSpreadEmptyVararg[0] !== 'number'"))
+        return "fail9: $argAfterSpreadEmptyVararg arguments"
+
+    return "OK"
+}
+
+// FILE: main.js
+function create() {
+    return arguments
+}