diff --git a/libraries/stdlib/api/js-v1/org.w3c.dom.encryptedmedia.kt b/libraries/stdlib/api/js-v1/org.w3c.dom.encryptedmedia.kt
index 3dde259928b..650f5cc554c 100644
--- a/libraries/stdlib/api/js-v1/org.w3c.dom.encryptedmedia.kt
+++ b/libraries/stdlib/api/js-v1/org.w3c.dom.encryptedmedia.kt
@@ -85,11 +85,12 @@ public open external class MediaKeyMessageEvent : org.w3c.dom.events.Event {
 }
 
 public external interface MediaKeyMessageEventInit : org.w3c.dom.EventInit {
-    public open var message: org.khronos.webgl.ArrayBuffer? { get; set; }
+    public abstract var message: org.khronos.webgl.ArrayBuffer? { get; set; }
 
-    public open var messageType: org.w3c.dom.encryptedmedia.MediaKeyMessageType? { get; set; }
+    public abstract var messageType: org.w3c.dom.encryptedmedia.MediaKeyMessageType? { get; set; }
 }
 
+@kotlin.js.JsName(name = "null")
 public external interface MediaKeyMessageType {
     public companion object of MediaKeyMessageType {
     }
@@ -121,11 +122,13 @@ public abstract external class MediaKeySession : org.w3c.dom.events.EventTarget
     public final fun update(response: dynamic): kotlin.js.Promise<kotlin.Unit>
 }
 
+@kotlin.js.JsName(name = "null")
 public external interface MediaKeySessionType {
     public companion object of MediaKeySessionType {
     }
 }
 
+@kotlin.js.JsName(name = "null")
 public external interface MediaKeyStatus {
     public companion object of MediaKeyStatus {
     }
@@ -181,6 +184,7 @@ public abstract external class MediaKeys {
     public final fun setServerCertificate(serverCertificate: dynamic): kotlin.js.Promise<kotlin.Boolean>
 }
 
+@kotlin.js.JsName(name = "null")
 public external interface MediaKeysRequirement {
     public companion object of MediaKeysRequirement {
     }
diff --git a/libraries/stdlib/api/js-v1/org.w3c.dom.kt b/libraries/stdlib/api/js-v1/org.w3c.dom.kt
index c9da485fdde..e79477eaec3 100644
--- a/libraries/stdlib/api/js-v1/org.w3c.dom.kt
+++ b/libraries/stdlib/api/js-v1/org.w3c.dom.kt
@@ -769,6 +769,7 @@ public open external class BeforeUnloadEvent : org.w3c.dom.events.Event {
     }
 }
 
+@kotlin.js.JsName(name = "null")
 public external interface BinaryType {
     public companion object of BinaryType {
     }
@@ -834,11 +835,13 @@ public open external class CDATASection : org.w3c.dom.Text {
     }
 }
 
+@kotlin.js.JsName(name = "null")
 public external interface CSSBoxType {
     public companion object of CSSBoxType {
     }
 }
 
+@kotlin.js.JsName(name = "null")
 public external interface CanPlayTypeResult {
     public companion object of CanPlayTypeResult {
     }
@@ -850,6 +853,7 @@ public external interface CanvasCompositing {
     public abstract var globalCompositeOperation: kotlin.String { get; set; }
 }
 
+@kotlin.js.JsName(name = "null")
 public external interface CanvasDirection {
     public companion object of CanvasDirection {
     }
@@ -889,6 +893,7 @@ public external interface CanvasDrawPath {
     public abstract fun stroke(path: org.w3c.dom.Path2D): kotlin.Unit
 }
 
+@kotlin.js.JsName(name = "null")
 public external interface CanvasFillRule {
     public companion object of CanvasFillRule {
     }
@@ -945,11 +950,13 @@ public external interface CanvasImageSmoothing {
 public external interface CanvasImageSource : org.w3c.dom.ImageBitmapSource {
 }
 
+@kotlin.js.JsName(name = "null")
 public external interface CanvasLineCap {
     public companion object of CanvasLineCap {
     }
 }
 
+@kotlin.js.JsName(name = "null")
 public external interface CanvasLineJoin {
     public companion object of CanvasLineJoin {
     }
@@ -1041,11 +1048,13 @@ public external interface CanvasText {
     public abstract fun strokeText(text: kotlin.String, x: kotlin.Double, y: kotlin.Double, maxWidth: kotlin.Double = ...): kotlin.Unit
 }
 
+@kotlin.js.JsName(name = "null")
 public external interface CanvasTextAlign {
     public companion object of CanvasTextAlign {
     }
 }
 
+@kotlin.js.JsName(name = "null")
 public external interface CanvasTextBaseline {
     public companion object of CanvasTextBaseline {
     }
@@ -1193,6 +1202,7 @@ public external interface CloseEventInit : org.w3c.dom.EventInit {
     public open var wasClean: kotlin.Boolean? { get; set; }
 }
 
+@kotlin.js.JsName(name = "null")
 public external interface ColorSpaceConversion {
     public companion object of ColorSpaceConversion {
     }
@@ -2120,6 +2130,7 @@ public external interface DocumentOrShadowRoot {
     public open val fullscreenElement: org.w3c.dom.Element? { get; }
 }
 
+@kotlin.js.JsName(name = "null")
 public external interface DocumentReadyState {
     public companion object of DocumentReadyState {
     }
@@ -7376,11 +7387,13 @@ public open external class ImageData : org.w3c.dom.ImageBitmapSource, org.khrono
     public open val width: kotlin.Int { get; }
 }
 
+@kotlin.js.JsName(name = "null")
 public external interface ImageOrientation {
     public companion object of ImageOrientation {
     }
 }
 
+@kotlin.js.JsName(name = "null")
 public external interface ImageSmoothingQuality {
     public companion object of ImageSmoothingQuality {
     }
@@ -8231,6 +8244,7 @@ public external interface PopStateEventInit : org.w3c.dom.EventInit {
     public open var state: kotlin.Any? { get; set; }
 }
 
+@kotlin.js.JsName(name = "null")
 public external interface PremultiplyAlpha {
     public companion object of PremultiplyAlpha {
     }
@@ -8299,7 +8313,7 @@ public open external class PromiseRejectionEvent : org.w3c.dom.events.Event {
 }
 
 public external interface PromiseRejectionEventInit : org.w3c.dom.EventInit {
-    public open var promise: kotlin.js.Promise<kotlin.Any?>? { get; set; }
+    public abstract var promise: kotlin.js.Promise<kotlin.Any?>? { get; set; }
 
     public open var reason: kotlin.Any? { get; set; }
 }
@@ -8405,6 +8419,7 @@ public external interface RelatedEventInit : org.w3c.dom.EventInit {
 public external interface RenderingContext {
 }
 
+@kotlin.js.JsName(name = "null")
 public external interface ResizeQuality {
     public companion object of ResizeQuality {
     }
@@ -8426,6 +8441,7 @@ public abstract external class Screen {
     public open val width: kotlin.Int { get; }
 }
 
+@kotlin.js.JsName(name = "null")
 public external interface ScrollBehavior {
     public companion object of ScrollBehavior {
     }
@@ -8437,6 +8453,7 @@ public external interface ScrollIntoViewOptions : org.w3c.dom.ScrollOptions {
     public open var inline: org.w3c.dom.ScrollLogicalPosition? { get; set; }
 }
 
+@kotlin.js.JsName(name = "null")
 public external interface ScrollLogicalPosition {
     public companion object of ScrollLogicalPosition {
     }
@@ -8446,6 +8463,7 @@ public external interface ScrollOptions {
     public open var behavior: org.w3c.dom.ScrollBehavior? { get; set; }
 }
 
+@kotlin.js.JsName(name = "null")
 public external interface ScrollRestoration {
     public companion object of ScrollRestoration {
     }
@@ -8457,6 +8475,7 @@ public external interface ScrollToOptions : org.w3c.dom.ScrollOptions {
     public open var top: kotlin.Double? { get; set; }
 }
 
+@kotlin.js.JsName(name = "null")
 public external interface SelectionMode {
     public companion object of SelectionMode {
     }
@@ -8511,9 +8530,10 @@ public open external class ShadowRoot : org.w3c.dom.DocumentFragment, org.w3c.do
 }
 
 public external interface ShadowRootInit {
-    public open var mode: org.w3c.dom.ShadowRootMode? { get; set; }
+    public abstract var mode: org.w3c.dom.ShadowRootMode? { get; set; }
 }
 
+@kotlin.js.JsName(name = "null")
 public external interface ShadowRootMode {
     public companion object of ShadowRootMode {
     }
@@ -8745,6 +8765,7 @@ public abstract external class TextTrackCueList {
     public final fun getCueById(id: kotlin.String): org.w3c.dom.TextTrackCue?
 }
 
+@kotlin.js.JsName(name = "null")
 public external interface TextTrackKind {
     public companion object of TextTrackKind {
     }
@@ -8764,6 +8785,7 @@ public abstract external class TextTrackList : org.w3c.dom.events.EventTarget {
     public final fun getTrackById(id: kotlin.String): org.w3c.dom.TextTrack?
 }
 
+@kotlin.js.JsName(name = "null")
 public external interface TextTrackMode {
     public companion object of TextTrackMode {
     }
@@ -9265,6 +9287,7 @@ public external interface WorkerOptions {
     public open var type: org.w3c.dom.WorkerType? { get; set; }
 }
 
+@kotlin.js.JsName(name = "null")
 public external interface WorkerType {
     public companion object of WorkerType {
     }
diff --git a/libraries/stdlib/api/js-v1/org.w3c.dom.mediacapture.kt b/libraries/stdlib/api/js-v1/org.w3c.dom.mediacapture.kt
index c34bd48596d..13ee88817ad 100644
--- a/libraries/stdlib/api/js-v1/org.w3c.dom.mediacapture.kt
+++ b/libraries/stdlib/api/js-v1/org.w3c.dom.mediacapture.kt
@@ -146,6 +146,7 @@ public abstract external class MediaDeviceInfo {
     public final fun toJSON(): dynamic
 }
 
+@kotlin.js.JsName(name = "null")
 public external interface MediaDeviceKind {
     public companion object of MediaDeviceKind {
     }
@@ -252,9 +253,10 @@ public open external class MediaStreamTrackEvent : org.w3c.dom.events.Event {
 }
 
 public external interface MediaStreamTrackEventInit : org.w3c.dom.EventInit {
-    public open var track: org.w3c.dom.mediacapture.MediaStreamTrack? { get; set; }
+    public abstract var track: org.w3c.dom.mediacapture.MediaStreamTrack? { get; set; }
 }
 
+@kotlin.js.JsName(name = "null")
 public external interface MediaStreamTrackState {
     public companion object of MediaStreamTrackState {
     }
@@ -429,11 +431,13 @@ public external interface ULongRange {
     public open var min: kotlin.Int? { get; set; }
 }
 
+@kotlin.js.JsName(name = "null")
 public external interface VideoFacingModeEnum {
     public companion object of VideoFacingModeEnum {
     }
 }
 
+@kotlin.js.JsName(name = "null")
 public external interface VideoResizeModeEnum {
     public companion object of VideoResizeModeEnum {
     }
diff --git a/libraries/stdlib/api/js-v1/org.w3c.dom.mediasource.kt b/libraries/stdlib/api/js-v1/org.w3c.dom.mediasource.kt
index a35f555e9a1..c3ad0a52bff 100644
--- a/libraries/stdlib/api/js-v1/org.w3c.dom.mediasource.kt
+++ b/libraries/stdlib/api/js-v1/org.w3c.dom.mediasource.kt
@@ -15,11 +15,13 @@ public val org.w3c.dom.mediasource.AppendMode.Companion.SEQUENCE: org.w3c.dom.me
 @kotlin.internal.InlineOnly
 public inline operator fun org.w3c.dom.mediasource.SourceBufferList.get(index: kotlin.Int): org.w3c.dom.mediasource.SourceBuffer?
 
+@kotlin.js.JsName(name = "null")
 public external interface AppendMode {
     public companion object of AppendMode {
     }
 }
 
+@kotlin.js.JsName(name = "null")
 public external interface EndOfStreamError {
     public companion object of EndOfStreamError {
     }
@@ -57,6 +59,7 @@ public open external class MediaSource : org.w3c.dom.events.EventTarget, org.w3c
     }
 }
 
+@kotlin.js.JsName(name = "null")
 public external interface ReadyState {
     public companion object of ReadyState {
     }
diff --git a/libraries/stdlib/api/js-v1/org.w3c.fetch.kt b/libraries/stdlib/api/js-v1/org.w3c.fetch.kt
index 393e775ec68..66106bf2476 100644
--- a/libraries/stdlib/api/js-v1/org.w3c.fetch.kt
+++ b/libraries/stdlib/api/js-v1/org.w3c.fetch.kt
@@ -166,16 +166,19 @@ public open external class Request : org.w3c.fetch.Body {
     public open override fun text(): kotlin.js.Promise<kotlin.String>
 }
 
+@kotlin.js.JsName(name = "null")
 public external interface RequestCache {
     public companion object of RequestCache {
     }
 }
 
+@kotlin.js.JsName(name = "null")
 public external interface RequestCredentials {
     public companion object of RequestCredentials {
     }
 }
 
+@kotlin.js.JsName(name = "null")
 public external interface RequestDestination {
     public companion object of RequestDestination {
     }
@@ -207,16 +210,19 @@ public external interface RequestInit {
     public open var window: kotlin.Any? { get; set; }
 }
 
+@kotlin.js.JsName(name = "null")
 public external interface RequestMode {
     public companion object of RequestMode {
     }
 }
 
+@kotlin.js.JsName(name = "null")
 public external interface RequestRedirect {
     public companion object of RequestRedirect {
     }
 }
 
+@kotlin.js.JsName(name = "null")
 public external interface RequestType {
     public companion object of RequestType {
     }
@@ -272,6 +278,7 @@ public external interface ResponseInit {
     public open var statusText: kotlin.String? { get; set; }
 }
 
+@kotlin.js.JsName(name = "null")
 public external interface ResponseType {
     public companion object of ResponseType {
     }
diff --git a/libraries/stdlib/api/js-v1/org.w3c.notifications.kt b/libraries/stdlib/api/js-v1/org.w3c.notifications.kt
index a74dccf465f..1c7c5d23485 100644
--- a/libraries/stdlib/api/js-v1/org.w3c.notifications.kt
+++ b/libraries/stdlib/api/js-v1/org.w3c.notifications.kt
@@ -81,13 +81,14 @@ public open external class Notification : org.w3c.dom.events.EventTarget {
 }
 
 public external interface NotificationAction {
-    public open var action: kotlin.String? { get; set; }
+    public abstract var action: kotlin.String? { get; set; }
 
     public open var icon: kotlin.String? { get; set; }
 
-    public open var title: kotlin.String? { get; set; }
+    public abstract var title: kotlin.String? { get; set; }
 }
 
+@kotlin.js.JsName(name = "null")
 public external interface NotificationDirection {
     public companion object of NotificationDirection {
     }
@@ -114,7 +115,7 @@ public open external class NotificationEvent : org.w3c.workers.ExtendableEvent {
 public external interface NotificationEventInit : org.w3c.workers.ExtendableEventInit {
     public open var action: kotlin.String? { get; set; }
 
-    public open var notification: org.w3c.notifications.Notification? { get; set; }
+    public abstract var notification: org.w3c.notifications.Notification? { get; set; }
 }
 
 public external interface NotificationOptions {
@@ -153,6 +154,7 @@ public external interface NotificationOptions {
     public open var vibrate: dynamic { get; set; }
 }
 
+@kotlin.js.JsName(name = "null")
 public external interface NotificationPermission {
     public companion object of NotificationPermission {
     }
diff --git a/libraries/stdlib/api/js-v1/org.w3c.workers.kt b/libraries/stdlib/api/js-v1/org.w3c.workers.kt
index e3e2bd3e994..b1369291951 100644
--- a/libraries/stdlib/api/js-v1/org.w3c.workers.kt
+++ b/libraries/stdlib/api/js-v1/org.w3c.workers.kt
@@ -127,6 +127,7 @@ public external interface ClientQueryOptions {
     public open var type: org.w3c.workers.ClientType? { get; set; }
 }
 
+@kotlin.js.JsName(name = "null")
 public external interface ClientType {
     public companion object of ClientType {
     }
@@ -226,7 +227,7 @@ public external interface FetchEventInit : org.w3c.workers.ExtendableEventInit {
 
     public open var isReload: kotlin.Boolean? { get; set; }
 
-    public open var request: org.w3c.fetch.Request? { get; set; }
+    public abstract var request: org.w3c.fetch.Request? { get; set; }
 }
 
 public open external class ForeignFetchEvent : org.w3c.workers.ExtendableEvent {
@@ -252,13 +253,13 @@ public open external class ForeignFetchEvent : org.w3c.workers.ExtendableEvent {
 public external interface ForeignFetchEventInit : org.w3c.workers.ExtendableEventInit {
     public open var origin: kotlin.String? { get; set; }
 
-    public open var request: org.w3c.fetch.Request? { get; set; }
+    public abstract var request: org.w3c.fetch.Request? { get; set; }
 }
 
 public external interface ForeignFetchOptions {
-    public open var origins: kotlin.Array<kotlin.String>? { get; set; }
+    public abstract var origins: kotlin.Array<kotlin.String>? { get; set; }
 
-    public open var scopes: kotlin.Array<kotlin.String>? { get; set; }
+    public abstract var scopes: kotlin.Array<kotlin.String>? { get; set; }
 }
 
 public external interface ForeignFetchResponse {
@@ -266,9 +267,10 @@ public external interface ForeignFetchResponse {
 
     public open var origin: kotlin.String? { get; set; }
 
-    public open var response: org.w3c.fetch.Response? { get; set; }
+    public abstract var response: org.w3c.fetch.Response? { get; set; }
 }
 
+@kotlin.js.JsName(name = "null")
 public external interface FrameType {
     public companion object of FrameType {
     }
@@ -430,6 +432,7 @@ public abstract external class ServiceWorkerRegistration : org.w3c.dom.events.Ev
     public final fun update(): kotlin.js.Promise<kotlin.Unit>
 }
 
+@kotlin.js.JsName(name = "null")
 public external interface ServiceWorkerState {
     public companion object of ServiceWorkerState {
     }
diff --git a/libraries/stdlib/api/js-v1/org.w3c.xhr.kt b/libraries/stdlib/api/js-v1/org.w3c.xhr.kt
index b6b5adc50d4..0e5ec8df3f3 100644
--- a/libraries/stdlib/api/js-v1/org.w3c.xhr.kt
+++ b/libraries/stdlib/api/js-v1/org.w3c.xhr.kt
@@ -135,6 +135,7 @@ public abstract external class XMLHttpRequestEventTarget : org.w3c.dom.events.Ev
     public open var ontimeout: ((org.w3c.dom.events.Event) -> dynamic)? { get; set; }
 }
 
+@kotlin.js.JsName(name = "null")
 public external interface XMLHttpRequestResponseType {
     public companion object of XMLHttpRequestResponseType {
     }
diff --git a/libraries/stdlib/api/js/org.w3c.dom.encryptedmedia.kt b/libraries/stdlib/api/js/org.w3c.dom.encryptedmedia.kt
index 3dde259928b..650f5cc554c 100644
--- a/libraries/stdlib/api/js/org.w3c.dom.encryptedmedia.kt
+++ b/libraries/stdlib/api/js/org.w3c.dom.encryptedmedia.kt
@@ -85,11 +85,12 @@ public open external class MediaKeyMessageEvent : org.w3c.dom.events.Event {
 }
 
 public external interface MediaKeyMessageEventInit : org.w3c.dom.EventInit {
-    public open var message: org.khronos.webgl.ArrayBuffer? { get; set; }
+    public abstract var message: org.khronos.webgl.ArrayBuffer? { get; set; }
 
-    public open var messageType: org.w3c.dom.encryptedmedia.MediaKeyMessageType? { get; set; }
+    public abstract var messageType: org.w3c.dom.encryptedmedia.MediaKeyMessageType? { get; set; }
 }
 
+@kotlin.js.JsName(name = "null")
 public external interface MediaKeyMessageType {
     public companion object of MediaKeyMessageType {
     }
@@ -121,11 +122,13 @@ public abstract external class MediaKeySession : org.w3c.dom.events.EventTarget
     public final fun update(response: dynamic): kotlin.js.Promise<kotlin.Unit>
 }
 
+@kotlin.js.JsName(name = "null")
 public external interface MediaKeySessionType {
     public companion object of MediaKeySessionType {
     }
 }
 
+@kotlin.js.JsName(name = "null")
 public external interface MediaKeyStatus {
     public companion object of MediaKeyStatus {
     }
@@ -181,6 +184,7 @@ public abstract external class MediaKeys {
     public final fun setServerCertificate(serverCertificate: dynamic): kotlin.js.Promise<kotlin.Boolean>
 }
 
+@kotlin.js.JsName(name = "null")
 public external interface MediaKeysRequirement {
     public companion object of MediaKeysRequirement {
     }
diff --git a/libraries/stdlib/api/js/org.w3c.dom.kt b/libraries/stdlib/api/js/org.w3c.dom.kt
index c9da485fdde..e79477eaec3 100644
--- a/libraries/stdlib/api/js/org.w3c.dom.kt
+++ b/libraries/stdlib/api/js/org.w3c.dom.kt
@@ -769,6 +769,7 @@ public open external class BeforeUnloadEvent : org.w3c.dom.events.Event {
     }
 }
 
+@kotlin.js.JsName(name = "null")
 public external interface BinaryType {
     public companion object of BinaryType {
     }
@@ -834,11 +835,13 @@ public open external class CDATASection : org.w3c.dom.Text {
     }
 }
 
+@kotlin.js.JsName(name = "null")
 public external interface CSSBoxType {
     public companion object of CSSBoxType {
     }
 }
 
+@kotlin.js.JsName(name = "null")
 public external interface CanPlayTypeResult {
     public companion object of CanPlayTypeResult {
     }
@@ -850,6 +853,7 @@ public external interface CanvasCompositing {
     public abstract var globalCompositeOperation: kotlin.String { get; set; }
 }
 
+@kotlin.js.JsName(name = "null")
 public external interface CanvasDirection {
     public companion object of CanvasDirection {
     }
@@ -889,6 +893,7 @@ public external interface CanvasDrawPath {
     public abstract fun stroke(path: org.w3c.dom.Path2D): kotlin.Unit
 }
 
+@kotlin.js.JsName(name = "null")
 public external interface CanvasFillRule {
     public companion object of CanvasFillRule {
     }
@@ -945,11 +950,13 @@ public external interface CanvasImageSmoothing {
 public external interface CanvasImageSource : org.w3c.dom.ImageBitmapSource {
 }
 
+@kotlin.js.JsName(name = "null")
 public external interface CanvasLineCap {
     public companion object of CanvasLineCap {
     }
 }
 
+@kotlin.js.JsName(name = "null")
 public external interface CanvasLineJoin {
     public companion object of CanvasLineJoin {
     }
@@ -1041,11 +1048,13 @@ public external interface CanvasText {
     public abstract fun strokeText(text: kotlin.String, x: kotlin.Double, y: kotlin.Double, maxWidth: kotlin.Double = ...): kotlin.Unit
 }
 
+@kotlin.js.JsName(name = "null")
 public external interface CanvasTextAlign {
     public companion object of CanvasTextAlign {
     }
 }
 
+@kotlin.js.JsName(name = "null")
 public external interface CanvasTextBaseline {
     public companion object of CanvasTextBaseline {
     }
@@ -1193,6 +1202,7 @@ public external interface CloseEventInit : org.w3c.dom.EventInit {
     public open var wasClean: kotlin.Boolean? { get; set; }
 }
 
+@kotlin.js.JsName(name = "null")
 public external interface ColorSpaceConversion {
     public companion object of ColorSpaceConversion {
     }
@@ -2120,6 +2130,7 @@ public external interface DocumentOrShadowRoot {
     public open val fullscreenElement: org.w3c.dom.Element? { get; }
 }
 
+@kotlin.js.JsName(name = "null")
 public external interface DocumentReadyState {
     public companion object of DocumentReadyState {
     }
@@ -7376,11 +7387,13 @@ public open external class ImageData : org.w3c.dom.ImageBitmapSource, org.khrono
     public open val width: kotlin.Int { get; }
 }
 
+@kotlin.js.JsName(name = "null")
 public external interface ImageOrientation {
     public companion object of ImageOrientation {
     }
 }
 
+@kotlin.js.JsName(name = "null")
 public external interface ImageSmoothingQuality {
     public companion object of ImageSmoothingQuality {
     }
@@ -8231,6 +8244,7 @@ public external interface PopStateEventInit : org.w3c.dom.EventInit {
     public open var state: kotlin.Any? { get; set; }
 }
 
+@kotlin.js.JsName(name = "null")
 public external interface PremultiplyAlpha {
     public companion object of PremultiplyAlpha {
     }
@@ -8299,7 +8313,7 @@ public open external class PromiseRejectionEvent : org.w3c.dom.events.Event {
 }
 
 public external interface PromiseRejectionEventInit : org.w3c.dom.EventInit {
-    public open var promise: kotlin.js.Promise<kotlin.Any?>? { get; set; }
+    public abstract var promise: kotlin.js.Promise<kotlin.Any?>? { get; set; }
 
     public open var reason: kotlin.Any? { get; set; }
 }
@@ -8405,6 +8419,7 @@ public external interface RelatedEventInit : org.w3c.dom.EventInit {
 public external interface RenderingContext {
 }
 
+@kotlin.js.JsName(name = "null")
 public external interface ResizeQuality {
     public companion object of ResizeQuality {
     }
@@ -8426,6 +8441,7 @@ public abstract external class Screen {
     public open val width: kotlin.Int { get; }
 }
 
+@kotlin.js.JsName(name = "null")
 public external interface ScrollBehavior {
     public companion object of ScrollBehavior {
     }
@@ -8437,6 +8453,7 @@ public external interface ScrollIntoViewOptions : org.w3c.dom.ScrollOptions {
     public open var inline: org.w3c.dom.ScrollLogicalPosition? { get; set; }
 }
 
+@kotlin.js.JsName(name = "null")
 public external interface ScrollLogicalPosition {
     public companion object of ScrollLogicalPosition {
     }
@@ -8446,6 +8463,7 @@ public external interface ScrollOptions {
     public open var behavior: org.w3c.dom.ScrollBehavior? { get; set; }
 }
 
+@kotlin.js.JsName(name = "null")
 public external interface ScrollRestoration {
     public companion object of ScrollRestoration {
     }
@@ -8457,6 +8475,7 @@ public external interface ScrollToOptions : org.w3c.dom.ScrollOptions {
     public open var top: kotlin.Double? { get; set; }
 }
 
+@kotlin.js.JsName(name = "null")
 public external interface SelectionMode {
     public companion object of SelectionMode {
     }
@@ -8511,9 +8530,10 @@ public open external class ShadowRoot : org.w3c.dom.DocumentFragment, org.w3c.do
 }
 
 public external interface ShadowRootInit {
-    public open var mode: org.w3c.dom.ShadowRootMode? { get; set; }
+    public abstract var mode: org.w3c.dom.ShadowRootMode? { get; set; }
 }
 
+@kotlin.js.JsName(name = "null")
 public external interface ShadowRootMode {
     public companion object of ShadowRootMode {
     }
@@ -8745,6 +8765,7 @@ public abstract external class TextTrackCueList {
     public final fun getCueById(id: kotlin.String): org.w3c.dom.TextTrackCue?
 }
 
+@kotlin.js.JsName(name = "null")
 public external interface TextTrackKind {
     public companion object of TextTrackKind {
     }
@@ -8764,6 +8785,7 @@ public abstract external class TextTrackList : org.w3c.dom.events.EventTarget {
     public final fun getTrackById(id: kotlin.String): org.w3c.dom.TextTrack?
 }
 
+@kotlin.js.JsName(name = "null")
 public external interface TextTrackMode {
     public companion object of TextTrackMode {
     }
@@ -9265,6 +9287,7 @@ public external interface WorkerOptions {
     public open var type: org.w3c.dom.WorkerType? { get; set; }
 }
 
+@kotlin.js.JsName(name = "null")
 public external interface WorkerType {
     public companion object of WorkerType {
     }
diff --git a/libraries/stdlib/api/js/org.w3c.dom.mediacapture.kt b/libraries/stdlib/api/js/org.w3c.dom.mediacapture.kt
index c34bd48596d..13ee88817ad 100644
--- a/libraries/stdlib/api/js/org.w3c.dom.mediacapture.kt
+++ b/libraries/stdlib/api/js/org.w3c.dom.mediacapture.kt
@@ -146,6 +146,7 @@ public abstract external class MediaDeviceInfo {
     public final fun toJSON(): dynamic
 }
 
+@kotlin.js.JsName(name = "null")
 public external interface MediaDeviceKind {
     public companion object of MediaDeviceKind {
     }
@@ -252,9 +253,10 @@ public open external class MediaStreamTrackEvent : org.w3c.dom.events.Event {
 }
 
 public external interface MediaStreamTrackEventInit : org.w3c.dom.EventInit {
-    public open var track: org.w3c.dom.mediacapture.MediaStreamTrack? { get; set; }
+    public abstract var track: org.w3c.dom.mediacapture.MediaStreamTrack? { get; set; }
 }
 
+@kotlin.js.JsName(name = "null")
 public external interface MediaStreamTrackState {
     public companion object of MediaStreamTrackState {
     }
@@ -429,11 +431,13 @@ public external interface ULongRange {
     public open var min: kotlin.Int? { get; set; }
 }
 
+@kotlin.js.JsName(name = "null")
 public external interface VideoFacingModeEnum {
     public companion object of VideoFacingModeEnum {
     }
 }
 
+@kotlin.js.JsName(name = "null")
 public external interface VideoResizeModeEnum {
     public companion object of VideoResizeModeEnum {
     }
diff --git a/libraries/stdlib/api/js/org.w3c.dom.mediasource.kt b/libraries/stdlib/api/js/org.w3c.dom.mediasource.kt
index a35f555e9a1..c3ad0a52bff 100644
--- a/libraries/stdlib/api/js/org.w3c.dom.mediasource.kt
+++ b/libraries/stdlib/api/js/org.w3c.dom.mediasource.kt
@@ -15,11 +15,13 @@ public val org.w3c.dom.mediasource.AppendMode.Companion.SEQUENCE: org.w3c.dom.me
 @kotlin.internal.InlineOnly
 public inline operator fun org.w3c.dom.mediasource.SourceBufferList.get(index: kotlin.Int): org.w3c.dom.mediasource.SourceBuffer?
 
+@kotlin.js.JsName(name = "null")
 public external interface AppendMode {
     public companion object of AppendMode {
     }
 }
 
+@kotlin.js.JsName(name = "null")
 public external interface EndOfStreamError {
     public companion object of EndOfStreamError {
     }
@@ -57,6 +59,7 @@ public open external class MediaSource : org.w3c.dom.events.EventTarget, org.w3c
     }
 }
 
+@kotlin.js.JsName(name = "null")
 public external interface ReadyState {
     public companion object of ReadyState {
     }
diff --git a/libraries/stdlib/api/js/org.w3c.fetch.kt b/libraries/stdlib/api/js/org.w3c.fetch.kt
index 393e775ec68..66106bf2476 100644
--- a/libraries/stdlib/api/js/org.w3c.fetch.kt
+++ b/libraries/stdlib/api/js/org.w3c.fetch.kt
@@ -166,16 +166,19 @@ public open external class Request : org.w3c.fetch.Body {
     public open override fun text(): kotlin.js.Promise<kotlin.String>
 }
 
+@kotlin.js.JsName(name = "null")
 public external interface RequestCache {
     public companion object of RequestCache {
     }
 }
 
+@kotlin.js.JsName(name = "null")
 public external interface RequestCredentials {
     public companion object of RequestCredentials {
     }
 }
 
+@kotlin.js.JsName(name = "null")
 public external interface RequestDestination {
     public companion object of RequestDestination {
     }
@@ -207,16 +210,19 @@ public external interface RequestInit {
     public open var window: kotlin.Any? { get; set; }
 }
 
+@kotlin.js.JsName(name = "null")
 public external interface RequestMode {
     public companion object of RequestMode {
     }
 }
 
+@kotlin.js.JsName(name = "null")
 public external interface RequestRedirect {
     public companion object of RequestRedirect {
     }
 }
 
+@kotlin.js.JsName(name = "null")
 public external interface RequestType {
     public companion object of RequestType {
     }
@@ -272,6 +278,7 @@ public external interface ResponseInit {
     public open var statusText: kotlin.String? { get; set; }
 }
 
+@kotlin.js.JsName(name = "null")
 public external interface ResponseType {
     public companion object of ResponseType {
     }
diff --git a/libraries/stdlib/api/js/org.w3c.notifications.kt b/libraries/stdlib/api/js/org.w3c.notifications.kt
index a74dccf465f..1c7c5d23485 100644
--- a/libraries/stdlib/api/js/org.w3c.notifications.kt
+++ b/libraries/stdlib/api/js/org.w3c.notifications.kt
@@ -81,13 +81,14 @@ public open external class Notification : org.w3c.dom.events.EventTarget {
 }
 
 public external interface NotificationAction {
-    public open var action: kotlin.String? { get; set; }
+    public abstract var action: kotlin.String? { get; set; }
 
     public open var icon: kotlin.String? { get; set; }
 
-    public open var title: kotlin.String? { get; set; }
+    public abstract var title: kotlin.String? { get; set; }
 }
 
+@kotlin.js.JsName(name = "null")
 public external interface NotificationDirection {
     public companion object of NotificationDirection {
     }
@@ -114,7 +115,7 @@ public open external class NotificationEvent : org.w3c.workers.ExtendableEvent {
 public external interface NotificationEventInit : org.w3c.workers.ExtendableEventInit {
     public open var action: kotlin.String? { get; set; }
 
-    public open var notification: org.w3c.notifications.Notification? { get; set; }
+    public abstract var notification: org.w3c.notifications.Notification? { get; set; }
 }
 
 public external interface NotificationOptions {
@@ -153,6 +154,7 @@ public external interface NotificationOptions {
     public open var vibrate: dynamic { get; set; }
 }
 
+@kotlin.js.JsName(name = "null")
 public external interface NotificationPermission {
     public companion object of NotificationPermission {
     }
diff --git a/libraries/stdlib/api/js/org.w3c.workers.kt b/libraries/stdlib/api/js/org.w3c.workers.kt
index e3e2bd3e994..b1369291951 100644
--- a/libraries/stdlib/api/js/org.w3c.workers.kt
+++ b/libraries/stdlib/api/js/org.w3c.workers.kt
@@ -127,6 +127,7 @@ public external interface ClientQueryOptions {
     public open var type: org.w3c.workers.ClientType? { get; set; }
 }
 
+@kotlin.js.JsName(name = "null")
 public external interface ClientType {
     public companion object of ClientType {
     }
@@ -226,7 +227,7 @@ public external interface FetchEventInit : org.w3c.workers.ExtendableEventInit {
 
     public open var isReload: kotlin.Boolean? { get; set; }
 
-    public open var request: org.w3c.fetch.Request? { get; set; }
+    public abstract var request: org.w3c.fetch.Request? { get; set; }
 }
 
 public open external class ForeignFetchEvent : org.w3c.workers.ExtendableEvent {
@@ -252,13 +253,13 @@ public open external class ForeignFetchEvent : org.w3c.workers.ExtendableEvent {
 public external interface ForeignFetchEventInit : org.w3c.workers.ExtendableEventInit {
     public open var origin: kotlin.String? { get; set; }
 
-    public open var request: org.w3c.fetch.Request? { get; set; }
+    public abstract var request: org.w3c.fetch.Request? { get; set; }
 }
 
 public external interface ForeignFetchOptions {
-    public open var origins: kotlin.Array<kotlin.String>? { get; set; }
+    public abstract var origins: kotlin.Array<kotlin.String>? { get; set; }
 
-    public open var scopes: kotlin.Array<kotlin.String>? { get; set; }
+    public abstract var scopes: kotlin.Array<kotlin.String>? { get; set; }
 }
 
 public external interface ForeignFetchResponse {
@@ -266,9 +267,10 @@ public external interface ForeignFetchResponse {
 
     public open var origin: kotlin.String? { get; set; }
 
-    public open var response: org.w3c.fetch.Response? { get; set; }
+    public abstract var response: org.w3c.fetch.Response? { get; set; }
 }
 
+@kotlin.js.JsName(name = "null")
 public external interface FrameType {
     public companion object of FrameType {
     }
@@ -430,6 +432,7 @@ public abstract external class ServiceWorkerRegistration : org.w3c.dom.events.Ev
     public final fun update(): kotlin.js.Promise<kotlin.Unit>
 }
 
+@kotlin.js.JsName(name = "null")
 public external interface ServiceWorkerState {
     public companion object of ServiceWorkerState {
     }
diff --git a/libraries/stdlib/api/js/org.w3c.xhr.kt b/libraries/stdlib/api/js/org.w3c.xhr.kt
index b6b5adc50d4..0e5ec8df3f3 100644
--- a/libraries/stdlib/api/js/org.w3c.xhr.kt
+++ b/libraries/stdlib/api/js/org.w3c.xhr.kt
@@ -135,6 +135,7 @@ public abstract external class XMLHttpRequestEventTarget : org.w3c.dom.events.Ev
     public open var ontimeout: ((org.w3c.dom.events.Event) -> dynamic)? { get; set; }
 }
 
+@kotlin.js.JsName(name = "null")
 public external interface XMLHttpRequestResponseType {
     public companion object of XMLHttpRequestResponseType {
     }