diff --git a/js/js.libraries/src/generated/org.khronos.webgl.kt b/js/js.libraries/src/generated/org.khronos.webgl.kt
index b318e7cee73..ce748ae37bf 100644
--- a/js/js.libraries/src/generated/org.khronos.webgl.kt
+++ b/js/js.libraries/src/generated/org.khronos.webgl.kt
@@ -30,31 +30,31 @@ native public open class WebGLContextAttributes {
     var failIfMajorPerformanceCaveat: Boolean = false
 }
 
-native public trait WebGLObject {
+native public interface WebGLObject {
 }
 
-native public trait WebGLBuffer : WebGLObject {
+native public interface WebGLBuffer : WebGLObject {
 }
 
-native public trait WebGLFramebuffer : WebGLObject {
+native public interface WebGLFramebuffer : WebGLObject {
 }
 
-native public trait WebGLProgram : WebGLObject {
+native public interface WebGLProgram : WebGLObject {
 }
 
-native public trait WebGLRenderbuffer : WebGLObject {
+native public interface WebGLRenderbuffer : WebGLObject {
 }
 
-native public trait WebGLShader : WebGLObject {
+native public interface WebGLShader : WebGLObject {
 }
 
-native public trait WebGLTexture : WebGLObject {
+native public interface WebGLTexture : WebGLObject {
 }
 
-native public trait WebGLUniformLocation {
+native public interface WebGLUniformLocation {
 }
 
-native public trait WebGLActiveInfo {
+native public interface WebGLActiveInfo {
     var size: Int
         get() = noImpl
         set(value) = noImpl
@@ -66,7 +66,7 @@ native public trait WebGLActiveInfo {
         set(value) = noImpl
 }
 
-native public trait WebGLShaderPrecisionFormat {
+native public interface WebGLShaderPrecisionFormat {
     var rangeMin: Int
         get() = noImpl
         set(value) = noImpl
@@ -78,7 +78,7 @@ native public trait WebGLShaderPrecisionFormat {
         set(value) = noImpl
 }
 
-native public trait WebGLRenderingContext : RenderingContext {
+native public interface WebGLRenderingContext : RenderingContext {
     var canvas: HTMLCanvasElement
         get() = noImpl
         set(value) = noImpl
diff --git a/js/js.libraries/src/generated/org.w3c.dom.css.kt b/js/js.libraries/src/generated/org.w3c.dom.css.kt
index 8e68a14993e..70e56890d5c 100644
--- a/js/js.libraries/src/generated/org.w3c.dom.css.kt
+++ b/js/js.libraries/src/generated/org.w3c.dom.css.kt
@@ -19,7 +19,7 @@ import org.w3c.performance.*
 import org.w3c.workers.*
 import org.w3c.xhr.*
 
-native public trait MediaList {
+native public interface MediaList {
     var mediaText: String
         get() = noImpl
         set(value) = noImpl
@@ -32,7 +32,7 @@ native public trait MediaList {
     fun deleteMedium(medium: String): Unit = noImpl
 }
 
-native public trait StyleSheet {
+native public interface StyleSheet {
     var type: String
         get() = noImpl
         set(value) = noImpl
@@ -56,7 +56,7 @@ native public trait StyleSheet {
         set(value) = noImpl
 }
 
-native public trait CSSStyleSheet : StyleSheet {
+native public interface CSSStyleSheet : StyleSheet {
     var ownerRule: CSSRule?
         get() = noImpl
         set(value) = noImpl
@@ -67,7 +67,7 @@ native public trait CSSStyleSheet : StyleSheet {
     fun deleteRule(index: Int): Unit = noImpl
 }
 
-native public trait StyleSheetList {
+native public interface StyleSheetList {
     var length: Int
         get() = noImpl
         set(value) = noImpl
@@ -75,7 +75,7 @@ native public trait StyleSheetList {
     nativeGetter fun get(index: Int): StyleSheet? = noImpl
 }
 
-native public trait CSSRuleList {
+native public interface CSSRuleList {
     var length: Int
         get() = noImpl
         set(value) = noImpl
@@ -83,7 +83,7 @@ native public trait CSSRuleList {
     nativeGetter fun get(index: Int): CSSRule? = noImpl
 }
 
-native public trait CSSRule {
+native public interface CSSRule {
     var type: Short
         get() = noImpl
         set(value) = noImpl
@@ -109,7 +109,7 @@ native public trait CSSRule {
     }
 }
 
-native public trait CSSStyleRule : CSSRule {
+native public interface CSSStyleRule : CSSRule {
     var selectorText: String
         get() = noImpl
         set(value) = noImpl
@@ -118,7 +118,7 @@ native public trait CSSStyleRule : CSSRule {
         set(value) = noImpl
 }
 
-native public trait CSSImportRule : CSSRule {
+native public interface CSSImportRule : CSSRule {
     var href: String
         get() = noImpl
         set(value) = noImpl
@@ -130,7 +130,7 @@ native public trait CSSImportRule : CSSRule {
         set(value) = noImpl
 }
 
-native public trait CSSGroupingRule : CSSRule {
+native public interface CSSGroupingRule : CSSRule {
     var cssRules: CSSRuleList
         get() = noImpl
         set(value) = noImpl
@@ -138,13 +138,13 @@ native public trait CSSGroupingRule : CSSRule {
     fun deleteRule(index: Int): Unit = noImpl
 }
 
-native public trait CSSMediaRule : CSSGroupingRule {
+native public interface CSSMediaRule : CSSGroupingRule {
     var media: MediaList
         get() = noImpl
         set(value) = noImpl
 }
 
-native public trait CSSPageRule : CSSGroupingRule {
+native public interface CSSPageRule : CSSGroupingRule {
     var selectorText: String
         get() = noImpl
         set(value) = noImpl
@@ -153,7 +153,7 @@ native public trait CSSPageRule : CSSGroupingRule {
         set(value) = noImpl
 }
 
-native public trait CSSMarginRule : CSSRule {
+native public interface CSSMarginRule : CSSRule {
     var name: String
         get() = noImpl
         set(value) = noImpl
@@ -162,7 +162,7 @@ native public trait CSSMarginRule : CSSRule {
         set(value) = noImpl
 }
 
-native public trait CSSNamespaceRule : CSSRule {
+native public interface CSSNamespaceRule : CSSRule {
     var namespaceURI: String
         get() = noImpl
         set(value) = noImpl
@@ -171,7 +171,7 @@ native public trait CSSNamespaceRule : CSSRule {
         set(value) = noImpl
 }
 
-native public trait CSSStyleDeclaration {
+native public interface CSSStyleDeclaration {
     var alignContent: String
         get() = noImpl
         set(value) = noImpl
@@ -869,7 +869,7 @@ native public trait CSSStyleDeclaration {
     fun removeProperty(property: String): String = noImpl
 }
 
-native public trait PseudoElement {
+native public interface PseudoElement {
     var cascadedStyle: CSSStyleDeclaration
         get() = noImpl
         set(value) = noImpl
@@ -884,6 +884,6 @@ native public trait PseudoElement {
         set(value) = noImpl
 }
 
-native public trait CSS {
+native public interface CSS {
 }
 
diff --git a/js/js.libraries/src/generated/org.w3c.dom.events.kt b/js/js.libraries/src/generated/org.w3c.dom.events.kt
index 7bca6f67ce7..50dd88db376 100644
--- a/js/js.libraries/src/generated/org.w3c.dom.events.kt
+++ b/js/js.libraries/src/generated/org.w3c.dom.events.kt
@@ -101,7 +101,7 @@ native public open class Event(type: String, eventInitDict: EventInit = noImpl)
     }
 }
 
-native public trait EventTarget {
+native public interface EventTarget {
     fun addEventListener(type: String, callback: EventListener?, capture: Boolean = false): Unit = noImpl
     fun addEventListener(type: String, callback: ((Event) -> Unit)?, capture: Boolean = false): Unit = noImpl
     fun removeEventListener(type: String, callback: EventListener?, capture: Boolean = false): Unit = noImpl
@@ -109,7 +109,7 @@ native public trait EventTarget {
     fun dispatchEvent(event: Event): Boolean = noImpl
 }
 
-native public trait EventListener {
+native public interface EventListener {
     fun handleEvent(event: Event): Unit = noImpl
 }
 
diff --git a/js/js.libraries/src/generated/org.w3c.dom.kt b/js/js.libraries/src/generated/org.w3c.dom.kt
index b2164783a45..77c40526005 100644
--- a/js/js.libraries/src/generated/org.w3c.dom.kt
+++ b/js/js.libraries/src/generated/org.w3c.dom.kt
@@ -19,24 +19,24 @@ import org.w3c.performance.*
 import org.w3c.workers.*
 import org.w3c.xhr.*
 
-native public trait HTMLAllCollection : HTMLCollection {
+native public interface HTMLAllCollection : HTMLCollection {
     fun item(name: String): UnionElementOrHTMLCollection? = noImpl
 //    override fun namedItem(name: String): UnionElementOrHTMLCollection? = noImpl
 //    nativeGetter override fun get(name: String): UnionElementOrHTMLCollection? = noImpl
 }
 
-native public trait HTMLFormControlsCollection : HTMLCollection {
+native public interface HTMLFormControlsCollection : HTMLCollection {
 //    override fun namedItem(name: String): UnionElementOrRadioNodeList? = noImpl
 //    nativeGetter override fun get(name: String): UnionElementOrRadioNodeList? = noImpl
 }
 
-native public trait RadioNodeList : NodeList, UnionElementOrRadioNodeList {
+native public interface RadioNodeList : NodeList, UnionElementOrRadioNodeList {
     var value: String
         get() = noImpl
         set(value) = noImpl
 }
 
-native public trait HTMLOptionsCollection : HTMLCollection {
+native public interface HTMLOptionsCollection : HTMLCollection {
     var selectedIndex: Int
         get() = noImpl
         set(value) = noImpl
@@ -45,7 +45,7 @@ native public trait HTMLOptionsCollection : HTMLCollection {
     fun remove(index: Int): Unit = noImpl
 }
 
-native public trait HTMLPropertiesCollection : HTMLCollection {
+native public interface HTMLPropertiesCollection : HTMLCollection {
     var names: Array<String>
         get() = noImpl
         set(value) = noImpl
@@ -53,16 +53,16 @@ native public trait HTMLPropertiesCollection : HTMLCollection {
 //    nativeGetter override fun get(name: String): PropertyNodeList? = noImpl
 }
 
-native public trait PropertyNodeList : NodeList {
+native public interface PropertyNodeList : NodeList {
     fun getValues(): Array<Any?> = noImpl
 }
 
-native public trait DOMStringMap {
+native public interface DOMStringMap {
     nativeGetter fun get(name: String): String? = noImpl
     nativeSetter fun set(name: String, value: String): Unit = noImpl
 }
 
-native public trait DOMElementMap {
+native public interface DOMElementMap {
     nativeGetter fun get(name: String): Element? = noImpl
     nativeSetter fun set(name: String, value: Element): Unit = noImpl
 }
@@ -472,7 +472,7 @@ native public open class XMLDocument : Document() {
     fun load(url: String): Boolean = noImpl
 }
 
-native public trait HTMLElement : Element {
+native public interface HTMLElement : Element {
     var title: String
         get() = noImpl
         set(value) = noImpl
@@ -755,25 +755,25 @@ native public trait HTMLElement : Element {
     fun forceSpellCheck(): Unit = noImpl
 }
 
-native public trait HTMLUnknownElement : HTMLElement {
+native public interface HTMLUnknownElement : HTMLElement {
 }
 
-native public trait HTMLHtmlElement : HTMLElement {
+native public interface HTMLHtmlElement : HTMLElement {
     var version: String
         get() = noImpl
         set(value) = noImpl
 }
 
-native public trait HTMLHeadElement : HTMLElement {
+native public interface HTMLHeadElement : HTMLElement {
 }
 
-native public trait HTMLTitleElement : HTMLElement {
+native public interface HTMLTitleElement : HTMLElement {
     var text: String
         get() = noImpl
         set(value) = noImpl
 }
 
-native public trait HTMLBaseElement : HTMLElement {
+native public interface HTMLBaseElement : HTMLElement {
     var href: String
         get() = noImpl
         set(value) = noImpl
@@ -782,7 +782,7 @@ native public trait HTMLBaseElement : HTMLElement {
         set(value) = noImpl
 }
 
-native public trait HTMLLinkElement : HTMLElement {
+native public interface HTMLLinkElement : HTMLElement {
     var href: String
         get() = noImpl
         set(value) = noImpl
@@ -821,7 +821,7 @@ native public trait HTMLLinkElement : HTMLElement {
         set(value) = noImpl
 }
 
-native public trait HTMLMetaElement : HTMLElement {
+native public interface HTMLMetaElement : HTMLElement {
     var name: String
         get() = noImpl
         set(value) = noImpl
@@ -836,7 +836,7 @@ native public trait HTMLMetaElement : HTMLElement {
         set(value) = noImpl
 }
 
-native public trait HTMLStyleElement : HTMLElement {
+native public interface HTMLStyleElement : HTMLElement {
     var media: String
         get() = noImpl
         set(value) = noImpl
@@ -851,7 +851,7 @@ native public trait HTMLStyleElement : HTMLElement {
         set(value) = noImpl
 }
 
-native public trait HTMLBodyElement : HTMLElement {
+native public interface HTMLBodyElement : HTMLElement {
     var text: String
         get() = noImpl
         set(value) = noImpl
@@ -911,19 +911,19 @@ native public trait HTMLBodyElement : HTMLElement {
         set(value) = noImpl
 }
 
-native public trait HTMLHeadingElement : HTMLElement {
+native public interface HTMLHeadingElement : HTMLElement {
     var align: String
         get() = noImpl
         set(value) = noImpl
 }
 
-native public trait HTMLParagraphElement : HTMLElement {
+native public interface HTMLParagraphElement : HTMLElement {
     var align: String
         get() = noImpl
         set(value) = noImpl
 }
 
-native public trait HTMLHRElement : HTMLElement {
+native public interface HTMLHRElement : HTMLElement {
     var align: String
         get() = noImpl
         set(value) = noImpl
@@ -941,19 +941,19 @@ native public trait HTMLHRElement : HTMLElement {
         set(value) = noImpl
 }
 
-native public trait HTMLPreElement : HTMLElement {
+native public interface HTMLPreElement : HTMLElement {
     var width: Int
         get() = noImpl
         set(value) = noImpl
 }
 
-native public trait HTMLQuoteElement : HTMLElement {
+native public interface HTMLQuoteElement : HTMLElement {
     var cite: String
         get() = noImpl
         set(value) = noImpl
 }
 
-native public trait HTMLOListElement : HTMLElement {
+native public interface HTMLOListElement : HTMLElement {
     var reversed: Boolean
         get() = noImpl
         set(value) = noImpl
@@ -968,7 +968,7 @@ native public trait HTMLOListElement : HTMLElement {
         set(value) = noImpl
 }
 
-native public trait HTMLUListElement : HTMLElement {
+native public interface HTMLUListElement : HTMLElement {
     var compact: Boolean
         get() = noImpl
         set(value) = noImpl
@@ -977,7 +977,7 @@ native public trait HTMLUListElement : HTMLElement {
         set(value) = noImpl
 }
 
-native public trait HTMLLIElement : HTMLElement {
+native public interface HTMLLIElement : HTMLElement {
     var value: Int
         get() = noImpl
         set(value) = noImpl
@@ -986,19 +986,19 @@ native public trait HTMLLIElement : HTMLElement {
         set(value) = noImpl
 }
 
-native public trait HTMLDListElement : HTMLElement {
+native public interface HTMLDListElement : HTMLElement {
     var compact: Boolean
         get() = noImpl
         set(value) = noImpl
 }
 
-native public trait HTMLDivElement : HTMLElement {
+native public interface HTMLDivElement : HTMLElement {
     var align: String
         get() = noImpl
         set(value) = noImpl
 }
 
-native public trait HTMLAnchorElement : HTMLElement {
+native public interface HTMLAnchorElement : HTMLElement {
     var target: String
         get() = noImpl
         set(value) = noImpl
@@ -1040,28 +1040,28 @@ native public trait HTMLAnchorElement : HTMLElement {
         set(value) = noImpl
 }
 
-native public trait HTMLDataElement : HTMLElement {
+native public interface HTMLDataElement : HTMLElement {
     var value: String
         get() = noImpl
         set(value) = noImpl
 }
 
-native public trait HTMLTimeElement : HTMLElement {
+native public interface HTMLTimeElement : HTMLElement {
     var dateTime: String
         get() = noImpl
         set(value) = noImpl
 }
 
-native public trait HTMLSpanElement : HTMLElement {
+native public interface HTMLSpanElement : HTMLElement {
 }
 
-native public trait HTMLBRElement : HTMLElement {
+native public interface HTMLBRElement : HTMLElement {
     var clear: String
         get() = noImpl
         set(value) = noImpl
 }
 
-native public trait HTMLModElement : HTMLElement {
+native public interface HTMLModElement : HTMLElement {
     var cite: String
         get() = noImpl
         set(value) = noImpl
@@ -1070,7 +1070,7 @@ native public trait HTMLModElement : HTMLElement {
         set(value) = noImpl
 }
 
-native public trait HTMLIFrameElement : HTMLElement {
+native public interface HTMLIFrameElement : HTMLElement {
     var src: String
         get() = noImpl
         set(value) = noImpl
@@ -1122,7 +1122,7 @@ native public trait HTMLIFrameElement : HTMLElement {
     fun getSVGDocument(): Document? = noImpl
 }
 
-native public trait HTMLEmbedElement : HTMLElement {
+native public interface HTMLEmbedElement : HTMLElement {
     var src: String
         get() = noImpl
         set(value) = noImpl
@@ -1144,7 +1144,7 @@ native public trait HTMLEmbedElement : HTMLElement {
     fun getSVGDocument(): Document? = noImpl
 }
 
-native public trait HTMLObjectElement : HTMLElement {
+native public interface HTMLObjectElement : HTMLElement {
     var data: String
         get() = noImpl
         set(value) = noImpl
@@ -1220,7 +1220,7 @@ native public trait HTMLObjectElement : HTMLElement {
     fun setCustomValidity(error: String): Unit = noImpl
 }
 
-native public trait HTMLParamElement : HTMLElement {
+native public interface HTMLParamElement : HTMLElement {
     var name: String
         get() = noImpl
         set(value) = noImpl
@@ -1235,7 +1235,7 @@ native public trait HTMLParamElement : HTMLElement {
         set(value) = noImpl
 }
 
-native public trait HTMLVideoElement : HTMLMediaElement, CanvasImageSource, ImageBitmapSource {
+native public interface HTMLVideoElement : HTMLMediaElement, CanvasImageSource, ImageBitmapSource {
     var width: Int
         get() = noImpl
         set(value) = noImpl
@@ -1253,10 +1253,10 @@ native public trait HTMLVideoElement : HTMLMediaElement, CanvasImageSource, Imag
         set(value) = noImpl
 }
 
-native public trait HTMLAudioElement : HTMLMediaElement {
+native public interface HTMLAudioElement : HTMLMediaElement {
 }
 
-native public trait HTMLSourceElement : HTMLElement {
+native public interface HTMLSourceElement : HTMLElement {
     var src: String
         get() = noImpl
         set(value) = noImpl
@@ -1274,7 +1274,7 @@ native public trait HTMLSourceElement : HTMLElement {
         set(value) = noImpl
 }
 
-native public trait HTMLTrackElement : HTMLElement {
+native public interface HTMLTrackElement : HTMLElement {
     var kind: String
         get() = noImpl
         set(value) = noImpl
@@ -1305,7 +1305,7 @@ native public trait HTMLTrackElement : HTMLElement {
     }
 }
 
-native public trait HTMLMediaElement : HTMLElement {
+native public interface HTMLMediaElement : HTMLElement {
     var error: MediaError?
         get() = noImpl
         set(value) = noImpl
@@ -1414,7 +1414,7 @@ native public trait HTMLMediaElement : HTMLElement {
     }
 }
 
-native public trait MediaError {
+native public interface MediaError {
     var code: Short
         get() = noImpl
         set(value) = noImpl
@@ -1427,7 +1427,7 @@ native public trait MediaError {
     }
 }
 
-native public trait AudioTrackList : EventTarget {
+native public interface AudioTrackList : EventTarget {
     var length: Int
         get() = noImpl
         set(value) = noImpl
@@ -1444,7 +1444,7 @@ native public trait AudioTrackList : EventTarget {
     fun getTrackById(id: String): AudioTrack? = noImpl
 }
 
-native public trait AudioTrack : UnionAudioTrackOrTextTrackOrVideoTrack {
+native public interface AudioTrack : UnionAudioTrackOrTextTrackOrVideoTrack {
     var id: String
         get() = noImpl
         set(value) = noImpl
@@ -1462,7 +1462,7 @@ native public trait AudioTrack : UnionAudioTrackOrTextTrackOrVideoTrack {
         set(value) = noImpl
 }
 
-native public trait VideoTrackList : EventTarget {
+native public interface VideoTrackList : EventTarget {
     var length: Int
         get() = noImpl
         set(value) = noImpl
@@ -1482,7 +1482,7 @@ native public trait VideoTrackList : EventTarget {
     fun getTrackById(id: String): VideoTrack? = noImpl
 }
 
-native public trait VideoTrack : UnionAudioTrackOrTextTrackOrVideoTrack {
+native public interface VideoTrack : UnionAudioTrackOrTextTrackOrVideoTrack {
     var id: String
         get() = noImpl
         set(value) = noImpl
@@ -1584,7 +1584,7 @@ native public open class MediaController : EventTarget {
     fun play(): Unit = noImpl
 }
 
-native public trait TextTrackList : EventTarget {
+native public interface TextTrackList : EventTarget {
     var length: Int
         get() = noImpl
         set(value) = noImpl
@@ -1601,7 +1601,7 @@ native public trait TextTrackList : EventTarget {
     fun getTrackById(id: String): TextTrack? = noImpl
 }
 
-native public trait TextTrack : EventTarget, UnionAudioTrackOrTextTrackOrVideoTrack {
+native public interface TextTrack : EventTarget, UnionAudioTrackOrTextTrackOrVideoTrack {
     var kind: String
         get() = noImpl
         set(value) = noImpl
@@ -1633,7 +1633,7 @@ native public trait TextTrack : EventTarget, UnionAudioTrackOrTextTrackOrVideoTr
     fun removeCue(cue: TextTrackCue): Unit = noImpl
 }
 
-native public trait TextTrackCueList {
+native public interface TextTrackCueList {
     var length: Int
         get() = noImpl
         set(value) = noImpl
@@ -1641,7 +1641,7 @@ native public trait TextTrackCueList {
     fun getCueById(id: String): TextTrackCue? = noImpl
 }
 
-native public trait TextTrackCue : EventTarget {
+native public interface TextTrackCue : EventTarget {
     var track: TextTrack?
         get() = noImpl
         set(value) = noImpl
@@ -1665,7 +1665,7 @@ native public trait TextTrackCue : EventTarget {
         set(value) = noImpl
 }
 
-native public trait TimeRanges {
+native public interface TimeRanges {
     var length: Int
         get() = noImpl
         set(value) = noImpl
@@ -1683,7 +1683,7 @@ native public open class TrackEventInit : EventInit() {
     var track: UnionAudioTrackOrTextTrackOrVideoTrack?
 }
 
-native public trait HTMLMapElement : HTMLElement {
+native public interface HTMLMapElement : HTMLElement {
     var name: String
         get() = noImpl
         set(value) = noImpl
@@ -1695,7 +1695,7 @@ native public trait HTMLMapElement : HTMLElement {
         set(value) = noImpl
 }
 
-native public trait HTMLAreaElement : HTMLElement {
+native public interface HTMLAreaElement : HTMLElement {
     var alt: String
         get() = noImpl
         set(value) = noImpl
@@ -1731,7 +1731,7 @@ native public trait HTMLAreaElement : HTMLElement {
         set(value) = noImpl
 }
 
-native public trait HTMLTableElement : HTMLElement {
+native public interface HTMLTableElement : HTMLElement {
     var caption: HTMLTableCaptionElement?
         get() = noImpl
         set(value) = noImpl
@@ -1789,13 +1789,13 @@ native public trait HTMLTableElement : HTMLElement {
     fun stopSorting(): Unit = noImpl
 }
 
-native public trait HTMLTableCaptionElement : HTMLElement {
+native public interface HTMLTableCaptionElement : HTMLElement {
     var align: String
         get() = noImpl
         set(value) = noImpl
 }
 
-native public trait HTMLTableColElement : HTMLElement {
+native public interface HTMLTableColElement : HTMLElement {
     var span: Int
         get() = noImpl
         set(value) = noImpl
@@ -1816,7 +1816,7 @@ native public trait HTMLTableColElement : HTMLElement {
         set(value) = noImpl
 }
 
-native public trait HTMLTableSectionElement : HTMLElement {
+native public interface HTMLTableSectionElement : HTMLElement {
     var rows: HTMLCollection
         get() = noImpl
         set(value) = noImpl
@@ -1836,7 +1836,7 @@ native public trait HTMLTableSectionElement : HTMLElement {
     fun deleteRow(index: Int): Unit = noImpl
 }
 
-native public trait HTMLTableRowElement : HTMLElement {
+native public interface HTMLTableRowElement : HTMLElement {
     var rowIndex: Int
         get() = noImpl
         set(value) = noImpl
@@ -1865,13 +1865,13 @@ native public trait HTMLTableRowElement : HTMLElement {
     fun deleteCell(index: Int): Unit = noImpl
 }
 
-native public trait HTMLTableDataCellElement : HTMLTableCellElement {
+native public interface HTMLTableDataCellElement : HTMLTableCellElement {
     var abbr: String
         get() = noImpl
         set(value) = noImpl
 }
 
-native public trait HTMLTableHeaderCellElement : HTMLTableCellElement {
+native public interface HTMLTableHeaderCellElement : HTMLTableCellElement {
     var scope: String
         get() = noImpl
         set(value) = noImpl
@@ -1884,7 +1884,7 @@ native public trait HTMLTableHeaderCellElement : HTMLTableCellElement {
     fun sort(): Unit = noImpl
 }
 
-native public trait HTMLTableCellElement : HTMLElement {
+native public interface HTMLTableCellElement : HTMLElement {
     var colSpan: Int
         get() = noImpl
         set(value) = noImpl
@@ -1926,7 +1926,7 @@ native public trait HTMLTableCellElement : HTMLElement {
         set(value) = noImpl
 }
 
-native public trait HTMLFormElement : HTMLElement {
+native public interface HTMLFormElement : HTMLElement {
     var acceptCharset: String
         get() = noImpl
         set(value) = noImpl
@@ -1969,7 +1969,7 @@ native public trait HTMLFormElement : HTMLElement {
     fun requestAutocomplete(): Unit = noImpl
 }
 
-native public trait HTMLLabelElement : HTMLElement {
+native public interface HTMLLabelElement : HTMLElement {
     var form: HTMLFormElement?
         get() = noImpl
         set(value) = noImpl
@@ -1981,7 +1981,7 @@ native public trait HTMLLabelElement : HTMLElement {
         set(value) = noImpl
 }
 
-native public trait HTMLInputElement : HTMLElement {
+native public interface HTMLInputElement : HTMLElement {
     var accept: String
         get() = noImpl
         set(value) = noImpl
@@ -2140,7 +2140,7 @@ native public trait HTMLInputElement : HTMLElement {
     fun setSelectionRange(start: Int, end: Int, direction: String = noImpl): Unit = noImpl
 }
 
-native public trait HTMLButtonElement : HTMLElement {
+native public interface HTMLButtonElement : HTMLElement {
     var autofocus: Boolean
         get() = noImpl
         set(value) = noImpl
@@ -2194,7 +2194,7 @@ native public trait HTMLButtonElement : HTMLElement {
     fun setCustomValidity(error: String): Unit = noImpl
 }
 
-native public trait HTMLSelectElement : HTMLElement {
+native public interface HTMLSelectElement : HTMLElement {
     var autocomplete: String
         get() = noImpl
         set(value) = noImpl
@@ -2260,13 +2260,13 @@ native public trait HTMLSelectElement : HTMLElement {
     fun setCustomValidity(error: String): Unit = noImpl
 }
 
-native public trait HTMLDataListElement : HTMLElement {
+native public interface HTMLDataListElement : HTMLElement {
     var options: HTMLCollection
         get() = noImpl
         set(value) = noImpl
 }
 
-native public trait HTMLOptGroupElement : HTMLElement, UnionHTMLOptGroupElementOrHTMLOptionElement {
+native public interface HTMLOptGroupElement : HTMLElement, UnionHTMLOptGroupElementOrHTMLOptionElement {
     var disabled: Boolean
         get() = noImpl
         set(value) = noImpl
@@ -2275,7 +2275,7 @@ native public trait HTMLOptGroupElement : HTMLElement, UnionHTMLOptGroupElementO
         set(value) = noImpl
 }
 
-native public trait HTMLOptionElement : HTMLElement, UnionHTMLOptGroupElementOrHTMLOptionElement {
+native public interface HTMLOptionElement : HTMLElement, UnionHTMLOptGroupElementOrHTMLOptionElement {
     var disabled: Boolean
         get() = noImpl
         set(value) = noImpl
@@ -2302,7 +2302,7 @@ native public trait HTMLOptionElement : HTMLElement, UnionHTMLOptGroupElementOrH
         set(value) = noImpl
 }
 
-native public trait HTMLTextAreaElement : HTMLElement {
+native public interface HTMLTextAreaElement : HTMLElement {
     var autocomplete: String
         get() = noImpl
         set(value) = noImpl
@@ -2390,7 +2390,7 @@ native public trait HTMLTextAreaElement : HTMLElement {
     fun setSelectionRange(start: Int, end: Int, direction: String = noImpl): Unit = noImpl
 }
 
-native public trait HTMLKeygenElement : HTMLElement {
+native public interface HTMLKeygenElement : HTMLElement {
     var autofocus: Boolean
         get() = noImpl
         set(value) = noImpl
@@ -2429,7 +2429,7 @@ native public trait HTMLKeygenElement : HTMLElement {
     fun setCustomValidity(error: String): Unit = noImpl
 }
 
-native public trait HTMLOutputElement : HTMLElement {
+native public interface HTMLOutputElement : HTMLElement {
     var htmlFor: DOMSettableTokenList
         get() = noImpl
         set(value) = noImpl
@@ -2465,7 +2465,7 @@ native public trait HTMLOutputElement : HTMLElement {
     fun setCustomValidity(error: String): Unit = noImpl
 }
 
-native public trait HTMLProgressElement : HTMLElement {
+native public interface HTMLProgressElement : HTMLElement {
     var value: Double
         get() = noImpl
         set(value) = noImpl
@@ -2480,7 +2480,7 @@ native public trait HTMLProgressElement : HTMLElement {
         set(value) = noImpl
 }
 
-native public trait HTMLMeterElement : HTMLElement {
+native public interface HTMLMeterElement : HTMLElement {
     var value: Double
         get() = noImpl
         set(value) = noImpl
@@ -2504,7 +2504,7 @@ native public trait HTMLMeterElement : HTMLElement {
         set(value) = noImpl
 }
 
-native public trait HTMLFieldSetElement : HTMLElement {
+native public interface HTMLFieldSetElement : HTMLElement {
     var disabled: Boolean
         get() = noImpl
         set(value) = noImpl
@@ -2534,7 +2534,7 @@ native public trait HTMLFieldSetElement : HTMLElement {
     fun setCustomValidity(error: String): Unit = noImpl
 }
 
-native public trait HTMLLegendElement : HTMLElement {
+native public interface HTMLLegendElement : HTMLElement {
     var form: HTMLFormElement?
         get() = noImpl
         set(value) = noImpl
@@ -2553,7 +2553,7 @@ native public open class AutocompleteErrorEventInit : EventInit() {
     var reason: String
 }
 
-native public trait ValidityState {
+native public interface ValidityState {
     var valueMissing: Boolean
         get() = noImpl
         set(value) = noImpl
@@ -2589,13 +2589,13 @@ native public trait ValidityState {
         set(value) = noImpl
 }
 
-native public trait HTMLDetailsElement : HTMLElement {
+native public interface HTMLDetailsElement : HTMLElement {
     var open: Boolean
         get() = noImpl
         set(value) = noImpl
 }
 
-native public trait HTMLMenuElement : HTMLElement {
+native public interface HTMLMenuElement : HTMLElement {
     var type: String
         get() = noImpl
         set(value) = noImpl
@@ -2607,7 +2607,7 @@ native public trait HTMLMenuElement : HTMLElement {
         set(value) = noImpl
 }
 
-native public trait HTMLMenuItemElement : HTMLElement {
+native public interface HTMLMenuItemElement : HTMLElement {
     var type: String
         get() = noImpl
         set(value) = noImpl
@@ -2644,7 +2644,7 @@ native public open class RelatedEventInit : EventInit() {
     var relatedTarget: EventTarget?
 }
 
-native public trait HTMLDialogElement : HTMLElement {
+native public interface HTMLDialogElement : HTMLElement {
     var open: Boolean
         get() = noImpl
         set(value) = noImpl
@@ -2656,7 +2656,7 @@ native public trait HTMLDialogElement : HTMLElement {
     fun close(returnValue: String = noImpl): Unit = noImpl
 }
 
-native public trait HTMLScriptElement : HTMLElement {
+native public interface HTMLScriptElement : HTMLElement {
     var src: String
         get() = noImpl
         set(value) = noImpl
@@ -2686,13 +2686,13 @@ native public trait HTMLScriptElement : HTMLElement {
         set(value) = noImpl
 }
 
-native public trait HTMLTemplateElement : HTMLElement {
+native public interface HTMLTemplateElement : HTMLElement {
     var content: DocumentFragment
         get() = noImpl
         set(value) = noImpl
 }
 
-native public trait HTMLCanvasElement : HTMLElement, CanvasImageSource, ImageBitmapSource {
+native public interface HTMLCanvasElement : HTMLElement, CanvasImageSource, ImageBitmapSource {
     var width: Int
         get() = noImpl
         set(value) = noImpl
@@ -2707,7 +2707,7 @@ native public trait HTMLCanvasElement : HTMLElement, CanvasImageSource, ImageBit
     fun toBlob(_callback: ((File) -> Unit)?, type: String = noImpl, vararg arguments: Any?): Unit = noImpl
 }
 
-native public trait CanvasProxy : Transferable {
+native public interface CanvasProxy : Transferable {
     fun setContext(context: RenderingContext): Unit = noImpl
 }
 
@@ -2841,15 +2841,15 @@ native public open class CanvasRenderingContext2D : RenderingContext, CanvasImag
     fun ellipse(x: Double, y: Double, radiusX: Double, radiusY: Double, rotation: Double, startAngle: Double, endAngle: Double, anticlockwise: Boolean = false): Unit = noImpl
 }
 
-native public trait CanvasGradient {
+native public interface CanvasGradient {
     fun addColorStop(offset: Double, color: String): Unit = noImpl
 }
 
-native public trait CanvasPattern {
+native public interface CanvasPattern {
     fun setTransform(transform: SVGMatrix): Unit = noImpl
 }
 
-native public trait TextMetrics {
+native public interface TextMetrics {
     var width: Double
         get() = noImpl
         set(value) = noImpl
@@ -2962,13 +2962,13 @@ native public open class Path2D {
     fun ellipse(x: Double, y: Double, radiusX: Double, radiusY: Double, rotation: Double, startAngle: Double, endAngle: Double, anticlockwise: Boolean = false): Unit = noImpl
 }
 
-native public trait Touch {
+native public interface Touch {
     var region: String?
         get() = noImpl
         set(value) = noImpl
 }
 
-native public trait DataTransfer {
+native public interface DataTransfer {
     var dropEffect: String
         get() = noImpl
         set(value) = noImpl
@@ -2990,7 +2990,7 @@ native public trait DataTransfer {
     fun clearData(format: String = noImpl): Unit = noImpl
 }
 
-native public trait DataTransferItemList {
+native public interface DataTransferItemList {
     var length: Int
         get() = noImpl
         set(value) = noImpl
@@ -3001,7 +3001,7 @@ native public trait DataTransferItemList {
     fun clear(): Unit = noImpl
 }
 
-native public trait DataTransferItem {
+native public interface DataTransferItem {
     var kind: String
         get() = noImpl
         set(value) = noImpl
@@ -3022,7 +3022,7 @@ native public open class DragEventInit : MouseEventInit() {
     var dataTransfer: DataTransfer?
 }
 
-native public trait Window : EventTarget, UnionMessagePortOrWindow {
+native public interface Window : EventTarget, UnionMessagePortOrWindow {
     var caches: CacheStorage
         get() = noImpl
         set(value) = noImpl
@@ -3365,13 +3365,13 @@ native public trait Window : EventTarget, UnionMessagePortOrWindow {
     fun fetch(input: dynamic, init: RequestInit = noImpl): dynamic = noImpl
 }
 
-native public trait BarProp {
+native public interface BarProp {
     var visible: Boolean
         get() = noImpl
         set(value) = noImpl
 }
 
-native public trait History {
+native public interface History {
     var length: Int
         get() = noImpl
         set(value) = noImpl
@@ -3385,7 +3385,7 @@ native public trait History {
     fun replaceState(data: Any?, title: String, url: String? = null): Unit = noImpl
 }
 
-native public trait Location {
+native public interface Location {
     var ancestorOrigins: Array<String>
         get() = noImpl
         set(value) = noImpl
@@ -3434,7 +3434,7 @@ native public open class BeforeUnloadEvent : Event(noImpl, noImpl) {
         set(value) = noImpl
 }
 
-native public trait ApplicationCache : EventTarget {
+native public interface ApplicationCache : EventTarget {
     var status: Short
         get() = noImpl
         set(value) = noImpl
@@ -3502,7 +3502,7 @@ native public open class ErrorEventInit : EventInit() {
     var error: Any?
 }
 
-native public trait Navigator {
+native public interface Navigator {
     var serviceWorker: ServiceWorkerContainer
         get() = noImpl
         set(value) = noImpl
@@ -3559,7 +3559,7 @@ native public trait Navigator {
     fun yieldForStorageUpdates(): Unit = noImpl
 }
 
-native public trait PluginArray {
+native public interface PluginArray {
     var length: Int
         get() = noImpl
         set(value) = noImpl
@@ -3570,7 +3570,7 @@ native public trait PluginArray {
     nativeGetter fun get(name: String): Plugin? = noImpl
 }
 
-native public trait MimeTypeArray {
+native public interface MimeTypeArray {
     var length: Int
         get() = noImpl
         set(value) = noImpl
@@ -3580,7 +3580,7 @@ native public trait MimeTypeArray {
     nativeGetter fun get(name: String): MimeType? = noImpl
 }
 
-native public trait Plugin {
+native public interface Plugin {
     var name: String
         get() = noImpl
         set(value) = noImpl
@@ -3599,7 +3599,7 @@ native public trait Plugin {
     nativeGetter fun get(name: String): MimeType? = noImpl
 }
 
-native public trait MimeType {
+native public interface MimeType {
     var type: String
         get() = noImpl
         set(value) = noImpl
@@ -3614,12 +3614,12 @@ native public trait MimeType {
         set(value) = noImpl
 }
 
-native public trait External {
+native public interface External {
     fun AddSearchProvider(engineURL: String): Unit = noImpl
     fun IsSearchProviderInstalled(engineURL: String): Int = noImpl
 }
 
-native public trait ImageBitmap : CanvasImageSource, ImageBitmapSource {
+native public interface ImageBitmap : CanvasImageSource, ImageBitmapSource {
     var width: Int
         get() = noImpl
         set(value) = noImpl
@@ -3759,7 +3759,7 @@ native public open class MessageChannel {
         set(value) = noImpl
 }
 
-native public trait MessagePort : EventTarget, UnionMessagePortOrWindow, UnionMessagePortOrServiceWorker, UnionClientOrMessagePortOrServiceWorker, Transferable {
+native public interface MessagePort : EventTarget, UnionMessagePortOrWindow, UnionMessagePortOrServiceWorker, UnionClientOrMessagePortOrServiceWorker, Transferable {
     var onmessage: ((Event) -> dynamic)?
         get() = noImpl
         set(value) = noImpl
@@ -3786,7 +3786,7 @@ native public open class BroadcastChannel(channel: String) : EventTarget {
     fun close(): Unit = noImpl
 }
 
-native public trait WorkerGlobalScope : EventTarget {
+native public interface WorkerGlobalScope : EventTarget {
     var caches: CacheStorage
         get() = noImpl
         set(value) = noImpl
@@ -3826,14 +3826,14 @@ native public trait WorkerGlobalScope : EventTarget {
     fun fetch(input: dynamic, init: RequestInit = noImpl): dynamic = noImpl
 }
 
-native public trait DedicatedWorkerGlobalScope : WorkerGlobalScope {
+native public interface DedicatedWorkerGlobalScope : WorkerGlobalScope {
     var onmessage: ((Event) -> dynamic)?
         get() = noImpl
         set(value) = noImpl
     fun postMessage(message: Any?, transfer: Array<Transferable> = noImpl): Unit = noImpl
 }
 
-native public trait SharedWorkerGlobalScope : WorkerGlobalScope {
+native public interface SharedWorkerGlobalScope : WorkerGlobalScope {
     var name: String
         get() = noImpl
         set(value) = noImpl
@@ -3865,7 +3865,7 @@ native public open class SharedWorker(scriptURL: String, name: String = noImpl)
         set(value) = noImpl
 }
 
-native public trait WorkerNavigator {
+native public interface WorkerNavigator {
     var serviceWorker: ServiceWorkerContainer
         get() = noImpl
         set(value) = noImpl
@@ -3902,10 +3902,10 @@ native public trait WorkerNavigator {
     fun taintEnabled(): Boolean = noImpl
 }
 
-native public trait WorkerLocation {
+native public interface WorkerLocation {
 }
 
-native public trait Storage {
+native public interface Storage {
     var length: Int
         get() = noImpl
         set(value) = noImpl
@@ -3944,7 +3944,7 @@ native public open class StorageEventInit : EventInit() {
     var storageArea: Storage?
 }
 
-native public trait HTMLAppletElement : HTMLElement {
+native public interface HTMLAppletElement : HTMLElement {
     var align: String
         get() = noImpl
         set(value) = noImpl
@@ -3980,7 +3980,7 @@ native public trait HTMLAppletElement : HTMLElement {
         set(value) = noImpl
 }
 
-native public trait HTMLMarqueeElement : HTMLElement {
+native public interface HTMLMarqueeElement : HTMLElement {
     var behavior: String
         get() = noImpl
         set(value) = noImpl
@@ -4027,7 +4027,7 @@ native public trait HTMLMarqueeElement : HTMLElement {
     fun stop(): Unit = noImpl
 }
 
-native public trait HTMLFrameSetElement : HTMLElement {
+native public interface HTMLFrameSetElement : HTMLElement {
     var cols: String
         get() = noImpl
         set(value) = noImpl
@@ -4075,7 +4075,7 @@ native public trait HTMLFrameSetElement : HTMLElement {
         set(value) = noImpl
 }
 
-native public trait HTMLFrameElement : HTMLElement {
+native public interface HTMLFrameElement : HTMLElement {
     var name: String
         get() = noImpl
         set(value) = noImpl
@@ -4108,13 +4108,13 @@ native public trait HTMLFrameElement : HTMLElement {
         set(value) = noImpl
 }
 
-native public trait HTMLDirectoryElement : HTMLElement {
+native public interface HTMLDirectoryElement : HTMLElement {
     var compact: Boolean
         get() = noImpl
         set(value) = noImpl
 }
 
-native public trait HTMLFontElement : HTMLElement {
+native public interface HTMLFontElement : HTMLElement {
     var color: String
         get() = noImpl
         set(value) = noImpl
@@ -4126,7 +4126,7 @@ native public trait HTMLFontElement : HTMLElement {
         set(value) = noImpl
 }
 
-native public trait HTMLImageElement : HTMLElement, CanvasImageSource, ImageBitmapSource {
+native public interface HTMLImageElement : HTMLElement, CanvasImageSource, ImageBitmapSource {
     var name: String
         get() = noImpl
         set(value) = noImpl
@@ -4189,7 +4189,7 @@ native public trait HTMLImageElement : HTMLElement, CanvasImageSource, ImageBitm
         set(value) = noImpl
 }
 
-native public trait HTMLPictureElement : HTMLElement {
+native public interface HTMLPictureElement : HTMLElement {
 }
 
 native public open class EventInit {
@@ -4208,7 +4208,7 @@ native public open class CustomEventInit : EventInit() {
     var detail: Any? = null
 }
 
-native public trait NodeList {
+native public interface NodeList {
     var length: Int
         get() = noImpl
         set(value) = noImpl
@@ -4216,7 +4216,7 @@ native public trait NodeList {
     nativeGetter fun get(index: Int): Node? = noImpl
 }
 
-native public trait HTMLCollection : UnionElementOrHTMLCollection {
+native public interface HTMLCollection : UnionElementOrHTMLCollection {
     var length: Int
         get() = noImpl
         set(value) = noImpl
@@ -4242,7 +4242,7 @@ native public open class MutationObserverInit {
     var attributeFilter: Array<String>
 }
 
-native public trait MutationRecord {
+native public interface MutationRecord {
     var type: String
         get() = noImpl
         set(value) = noImpl
@@ -4272,7 +4272,7 @@ native public trait MutationRecord {
         set(value) = noImpl
 }
 
-native public trait Node : EventTarget {
+native public interface Node : EventTarget {
     var nodeType: Short
         get() = noImpl
         set(value) = noImpl
@@ -4348,7 +4348,7 @@ native public trait Node : EventTarget {
     }
 }
 
-native public trait DOMImplementation {
+native public interface DOMImplementation {
     fun createDocumentType(qualifiedName: String, publicId: String, systemId: String): DocumentType = noImpl
     fun createDocument(namespace: String?, qualifiedName: String, doctype: DocumentType? = null): XMLDocument = noImpl
     fun createHTMLDocument(title: String = noImpl): Document = noImpl
@@ -4377,7 +4377,7 @@ native public open class DocumentFragment : Node {
     fun querySelectorAll(selectors: String): NodeList = noImpl
 }
 
-native public trait DocumentType : Node {
+native public interface DocumentType : Node {
     var name: String
         get() = noImpl
         set(value) = noImpl
@@ -4393,7 +4393,7 @@ native public trait DocumentType : Node {
     fun remove(): Unit = noImpl
 }
 
-native public trait Element : Node, UnionElementOrHTMLCollection, UnionElementOrRadioNodeList, UnionElementOrMouseEvent, UnionElementOrProcessingInstruction {
+native public interface Element : Node, UnionElementOrHTMLCollection, UnionElementOrRadioNodeList, UnionElementOrMouseEvent, UnionElementOrProcessingInstruction {
     var innerHTML: String
         get() = noImpl
         set(value) = noImpl
@@ -4488,7 +4488,7 @@ native public trait Element : Node, UnionElementOrHTMLCollection, UnionElementOr
     fun remove(): Unit = noImpl
 }
 
-native public trait NamedNodeMap {
+native public interface NamedNodeMap {
     var length: Int
         get() = noImpl
         set(value) = noImpl
@@ -4503,7 +4503,7 @@ native public trait NamedNodeMap {
     fun removeNamedItemNS(namespace: String?, localName: String): Attr = noImpl
 }
 
-native public trait Attr {
+native public interface Attr {
     var namespaceURI: String?
         get() = noImpl
         set(value) = noImpl
@@ -4533,7 +4533,7 @@ native public trait Attr {
         set(value) = noImpl
 }
 
-native public trait CharacterData : Node {
+native public interface CharacterData : Node {
     var data: String
         get() = noImpl
         set(value) = noImpl
@@ -4564,7 +4564,7 @@ native public open class Text(data: String = "") : CharacterData {
     fun splitText(offset: Int): Text = noImpl
 }
 
-native public trait ProcessingInstruction : CharacterData, UnionElementOrProcessingInstruction {
+native public interface ProcessingInstruction : CharacterData, UnionElementOrProcessingInstruction {
     var target: String
         get() = noImpl
         set(value) = noImpl
@@ -4625,7 +4625,7 @@ native public open class Range {
     }
 }
 
-native public trait NodeIterator {
+native public interface NodeIterator {
     var root: Node
         get() = noImpl
         set(value) = noImpl
@@ -4646,7 +4646,7 @@ native public trait NodeIterator {
     fun detach(): Unit = noImpl
 }
 
-native public trait TreeWalker {
+native public interface TreeWalker {
     var root: Node
         get() = noImpl
         set(value) = noImpl
@@ -4668,7 +4668,7 @@ native public trait TreeWalker {
     fun nextNode(): Node? = noImpl
 }
 
-native public trait NodeFilter {
+native public interface NodeFilter {
     fun acceptNode(node: Node): Short = noImpl
 
     companion object {
@@ -4691,7 +4691,7 @@ native public trait NodeFilter {
     }
 }
 
-native public trait DOMTokenList {
+native public interface DOMTokenList {
     var length: Int
         get() = noImpl
         set(value) = noImpl
@@ -4703,13 +4703,13 @@ native public trait DOMTokenList {
     fun toggle(token: String, force: Boolean = noImpl): Boolean = noImpl
 }
 
-native public trait DOMSettableTokenList : DOMTokenList {
+native public interface DOMSettableTokenList : DOMTokenList {
     var value: String
         get() = noImpl
         set(value) = noImpl
 }
 
-native public trait Selection {
+native public interface Selection {
     var anchorNode: Node?
         get() = noImpl
         set(value) = noImpl
@@ -4768,39 +4768,39 @@ native public open class EditingInputEventInit : EventInit() {
     var value: String
 }
 
-native public marker trait UnionElementOrHTMLCollection {
+native public marker interface UnionElementOrHTMLCollection {
 }
 
-native public marker trait UnionElementOrRadioNodeList {
+native public marker interface UnionElementOrRadioNodeList {
 }
 
-native public marker trait UnionHTMLOptGroupElementOrHTMLOptionElement {
+native public marker interface UnionHTMLOptGroupElementOrHTMLOptionElement {
 }
 
-native public marker trait UnionAudioTrackOrTextTrackOrVideoTrack {
+native public marker interface UnionAudioTrackOrTextTrackOrVideoTrack {
 }
 
-native public marker trait UnionElementOrMouseEvent {
+native public marker interface UnionElementOrMouseEvent {
 }
 
-native public marker trait UnionMessagePortOrWindow {
+native public marker interface UnionMessagePortOrWindow {
 }
 
-native public marker trait UnionElementOrProcessingInstruction {
+native public marker interface UnionElementOrProcessingInstruction {
 }
 
-native public marker trait ArrayBufferView {
+native public marker interface ArrayBufferView {
 }
 
-native public marker trait Transferable {
+native public marker interface Transferable {
 }
 
-native public marker trait RenderingContext {
+native public marker interface RenderingContext {
 }
 
-native public marker trait CanvasImageSource {
+native public marker interface CanvasImageSource {
 }
 
-native public marker trait ImageBitmapSource {
+native public marker interface ImageBitmapSource {
 }
 
diff --git a/js/js.libraries/src/generated/org.w3c.dom.svg.kt b/js/js.libraries/src/generated/org.w3c.dom.svg.kt
index 5376d557cc6..ad2885cdef0 100644
--- a/js/js.libraries/src/generated/org.w3c.dom.svg.kt
+++ b/js/js.libraries/src/generated/org.w3c.dom.svg.kt
@@ -25,7 +25,7 @@ native public open class SVGDocument : Document() {
         set(value) = noImpl
 }
 
-native public trait SVGSVGElement : SVGElement, SVGTests, SVGLangSpace, SVGExternalResourcesRequired, SVGStylable, SVGLocatable, SVGFitToViewBox, SVGZoomAndPan {
+native public interface SVGSVGElement : SVGElement, SVGTests, SVGLangSpace, SVGExternalResourcesRequired, SVGStylable, SVGLocatable, SVGFitToViewBox, SVGZoomAndPan {
     var x: SVGAnimatedLength
         get() = noImpl
         set(value) = noImpl
@@ -96,22 +96,22 @@ native public trait SVGSVGElement : SVGElement, SVGTests, SVGLangSpace, SVGExter
     fun getElementById(elementId: String): Element = noImpl
 }
 
-native public trait SVGGElement : SVGElement, SVGTests, SVGLangSpace, SVGExternalResourcesRequired, SVGStylable, SVGTransformable {
+native public interface SVGGElement : SVGElement, SVGTests, SVGLangSpace, SVGExternalResourcesRequired, SVGStylable, SVGTransformable {
 }
 
-native public trait SVGDefsElement : SVGElement, SVGTests, SVGLangSpace, SVGExternalResourcesRequired, SVGStylable, SVGTransformable {
+native public interface SVGDefsElement : SVGElement, SVGTests, SVGLangSpace, SVGExternalResourcesRequired, SVGStylable, SVGTransformable {
 }
 
-native public trait SVGDescElement : SVGElement, SVGLangSpace, SVGStylable {
+native public interface SVGDescElement : SVGElement, SVGLangSpace, SVGStylable {
 }
 
-native public trait SVGTitleElement : SVGElement, SVGLangSpace, SVGStylable {
+native public interface SVGTitleElement : SVGElement, SVGLangSpace, SVGStylable {
 }
 
-native public trait SVGSymbolElement : SVGElement, SVGLangSpace, SVGExternalResourcesRequired, SVGStylable, SVGFitToViewBox {
+native public interface SVGSymbolElement : SVGElement, SVGLangSpace, SVGExternalResourcesRequired, SVGStylable, SVGFitToViewBox {
 }
 
-native public trait SVGUseElement : SVGElement, SVGURIReference, SVGTests, SVGLangSpace, SVGExternalResourcesRequired, SVGStylable, SVGTransformable {
+native public interface SVGUseElement : SVGElement, SVGURIReference, SVGTests, SVGLangSpace, SVGExternalResourcesRequired, SVGStylable, SVGTransformable {
     var x: SVGAnimatedLength
         get() = noImpl
         set(value) = noImpl
@@ -132,7 +132,7 @@ native public trait SVGUseElement : SVGElement, SVGURIReference, SVGTests, SVGLa
         set(value) = noImpl
 }
 
-native public trait SVGElementInstance : EventTarget {
+native public interface SVGElementInstance : EventTarget {
     var correspondingElement: SVGElement
         get() = noImpl
         set(value) = noImpl
@@ -159,14 +159,14 @@ native public trait SVGElementInstance : EventTarget {
         set(value) = noImpl
 }
 
-native public trait SVGElementInstanceList {
+native public interface SVGElementInstanceList {
     var length: Int
         get() = noImpl
         set(value) = noImpl
     fun item(index: Int): SVGElementInstance = noImpl
 }
 
-native public trait SVGImageElement : SVGElement, SVGURIReference, SVGTests, SVGLangSpace, SVGExternalResourcesRequired, SVGStylable, SVGTransformable {
+native public interface SVGImageElement : SVGElement, SVGURIReference, SVGTests, SVGLangSpace, SVGExternalResourcesRequired, SVGStylable, SVGTransformable {
     var x: SVGAnimatedLength
         get() = noImpl
         set(value) = noImpl
@@ -184,14 +184,14 @@ native public trait SVGImageElement : SVGElement, SVGURIReference, SVGTests, SVG
         set(value) = noImpl
 }
 
-native public trait SVGSwitchElement : SVGElement, SVGTests, SVGLangSpace, SVGExternalResourcesRequired, SVGStylable, SVGTransformable {
+native public interface SVGSwitchElement : SVGElement, SVGTests, SVGLangSpace, SVGExternalResourcesRequired, SVGStylable, SVGTransformable {
 }
 
-native public trait GetSVGDocument {
+native public interface GetSVGDocument {
     fun getSVGDocument(): SVGDocument = noImpl
 }
 
-native public trait SVGElement : Element {
+native public interface SVGElement : Element {
 //    var id: dynamic
 //        get() = noImpl
 //        set(value) = noImpl
@@ -209,7 +209,7 @@ native public trait SVGElement : Element {
         set(value) = noImpl
 }
 
-native public trait SVGAnimatedBoolean {
+native public interface SVGAnimatedBoolean {
     var baseVal: dynamic
         get() = noImpl
         set(value) = noImpl
@@ -218,7 +218,7 @@ native public trait SVGAnimatedBoolean {
         set(value) = noImpl
 }
 
-native public trait SVGAnimatedString {
+native public interface SVGAnimatedString {
     var baseVal: dynamic
         get() = noImpl
         set(value) = noImpl
@@ -227,7 +227,7 @@ native public trait SVGAnimatedString {
         set(value) = noImpl
 }
 
-native public trait SVGStringList {
+native public interface SVGStringList {
     var numberOfItems: Int
         get() = noImpl
         set(value) = noImpl
@@ -240,7 +240,7 @@ native public trait SVGStringList {
     fun appendItem(newItem: String): String = noImpl
 }
 
-native public trait SVGAnimatedEnumeration {
+native public interface SVGAnimatedEnumeration {
     var baseVal: dynamic
         get() = noImpl
         set(value) = noImpl
@@ -249,7 +249,7 @@ native public trait SVGAnimatedEnumeration {
         set(value) = noImpl
 }
 
-native public trait SVGAnimatedInteger {
+native public interface SVGAnimatedInteger {
     var baseVal: dynamic
         get() = noImpl
         set(value) = noImpl
@@ -258,13 +258,13 @@ native public trait SVGAnimatedInteger {
         set(value) = noImpl
 }
 
-native public trait SVGNumber {
+native public interface SVGNumber {
     var value: dynamic
         get() = noImpl
         set(value) = noImpl
 }
 
-native public trait SVGAnimatedNumber {
+native public interface SVGAnimatedNumber {
     var baseVal: dynamic
         get() = noImpl
         set(value) = noImpl
@@ -273,7 +273,7 @@ native public trait SVGAnimatedNumber {
         set(value) = noImpl
 }
 
-native public trait SVGNumberList {
+native public interface SVGNumberList {
     var numberOfItems: Int
         get() = noImpl
         set(value) = noImpl
@@ -286,7 +286,7 @@ native public trait SVGNumberList {
     fun appendItem(newItem: SVGNumber): SVGNumber = noImpl
 }
 
-native public trait SVGAnimatedNumberList {
+native public interface SVGAnimatedNumberList {
     var baseVal: SVGNumberList
         get() = noImpl
         set(value) = noImpl
@@ -295,7 +295,7 @@ native public trait SVGAnimatedNumberList {
         set(value) = noImpl
 }
 
-native public trait SVGLength {
+native public interface SVGLength {
     var unitType: Short
         get() = noImpl
         set(value) = noImpl
@@ -326,7 +326,7 @@ native public trait SVGLength {
     }
 }
 
-native public trait SVGAnimatedLength {
+native public interface SVGAnimatedLength {
     var baseVal: SVGLength
         get() = noImpl
         set(value) = noImpl
@@ -335,7 +335,7 @@ native public trait SVGAnimatedLength {
         set(value) = noImpl
 }
 
-native public trait SVGLengthList {
+native public interface SVGLengthList {
     var numberOfItems: Int
         get() = noImpl
         set(value) = noImpl
@@ -348,7 +348,7 @@ native public trait SVGLengthList {
     fun appendItem(newItem: SVGLength): SVGLength = noImpl
 }
 
-native public trait SVGAnimatedLengthList {
+native public interface SVGAnimatedLengthList {
     var baseVal: SVGLengthList
         get() = noImpl
         set(value) = noImpl
@@ -357,7 +357,7 @@ native public trait SVGAnimatedLengthList {
         set(value) = noImpl
 }
 
-native public trait SVGAngle {
+native public interface SVGAngle {
     var unitType: Short
         get() = noImpl
         set(value) = noImpl
@@ -382,7 +382,7 @@ native public trait SVGAngle {
     }
 }
 
-native public trait SVGAnimatedAngle {
+native public interface SVGAnimatedAngle {
     var baseVal: SVGAngle
         get() = noImpl
         set(value) = noImpl
@@ -391,7 +391,7 @@ native public trait SVGAnimatedAngle {
         set(value) = noImpl
 }
 
-native public trait SVGColor {
+native public interface SVGColor {
     var colorType: Short
         get() = noImpl
         set(value) = noImpl
@@ -413,7 +413,7 @@ native public trait SVGColor {
     }
 }
 
-native public trait SVGICCColor {
+native public interface SVGICCColor {
     var colorProfile: dynamic
         get() = noImpl
         set(value) = noImpl
@@ -422,7 +422,7 @@ native public trait SVGICCColor {
         set(value) = noImpl
 }
 
-native public trait SVGRect {
+native public interface SVGRect {
     var x: dynamic
         get() = noImpl
         set(value) = noImpl
@@ -437,7 +437,7 @@ native public trait SVGRect {
         set(value) = noImpl
 }
 
-native public trait SVGAnimatedRect {
+native public interface SVGAnimatedRect {
     var baseVal: SVGRect
         get() = noImpl
         set(value) = noImpl
@@ -446,7 +446,7 @@ native public trait SVGAnimatedRect {
         set(value) = noImpl
 }
 
-native public trait SVGUnitTypes {
+native public interface SVGUnitTypes {
 
     companion object {
         val SVG_UNIT_TYPE_UNKNOWN: Short = 0
@@ -455,11 +455,11 @@ native public trait SVGUnitTypes {
     }
 }
 
-native public trait SVGStylable {
+native public interface SVGStylable {
     fun getPresentationAttribute(name: String): dynamic = noImpl
 }
 
-native public trait SVGLocatable {
+native public interface SVGLocatable {
     var nearestViewportElement: SVGElement
         get() = noImpl
         set(value) = noImpl
@@ -472,13 +472,13 @@ native public trait SVGLocatable {
     fun getTransformToElement(element: SVGElement): SVGMatrix = noImpl
 }
 
-native public trait SVGTransformable : SVGLocatable {
+native public interface SVGTransformable : SVGLocatable {
     var transform: SVGAnimatedTransformList
         get() = noImpl
         set(value) = noImpl
 }
 
-native public trait SVGTests {
+native public interface SVGTests {
     var requiredFeatures: SVGStringList
         get() = noImpl
         set(value) = noImpl
@@ -491,7 +491,7 @@ native public trait SVGTests {
     fun hasExtension(extension: String): Boolean = noImpl
 }
 
-native public trait SVGLangSpace {
+native public interface SVGLangSpace {
     var xmllang: dynamic
         get() = noImpl
         set(value) = noImpl
@@ -500,13 +500,13 @@ native public trait SVGLangSpace {
         set(value) = noImpl
 }
 
-native public trait SVGExternalResourcesRequired {
+native public interface SVGExternalResourcesRequired {
     var externalResourcesRequired: SVGAnimatedBoolean
         get() = noImpl
         set(value) = noImpl
 }
 
-native public trait SVGFitToViewBox {
+native public interface SVGFitToViewBox {
     var viewBox: SVGAnimatedRect
         get() = noImpl
         set(value) = noImpl
@@ -515,7 +515,7 @@ native public trait SVGFitToViewBox {
         set(value) = noImpl
 }
 
-native public trait SVGZoomAndPan {
+native public interface SVGZoomAndPan {
     var zoomAndPan: dynamic
         get() = noImpl
         set(value) = noImpl
@@ -527,7 +527,7 @@ native public trait SVGZoomAndPan {
     }
 }
 
-native public trait SVGViewSpec : SVGZoomAndPan, SVGFitToViewBox {
+native public interface SVGViewSpec : SVGZoomAndPan, SVGFitToViewBox {
     var transform: SVGTransformList
         get() = noImpl
         set(value) = noImpl
@@ -548,20 +548,20 @@ native public trait SVGViewSpec : SVGZoomAndPan, SVGFitToViewBox {
         set(value) = noImpl
 }
 
-native public trait SVGURIReference {
+native public interface SVGURIReference {
     var href: SVGAnimatedString
         get() = noImpl
         set(value) = noImpl
 }
 
-native public trait SVGCSSRule : CSSRule {
+native public interface SVGCSSRule : CSSRule {
 
     companion object {
         val COLOR_PROFILE_RULE: Short = 7
     }
 }
 
-native public trait SVGRenderingIntent {
+native public interface SVGRenderingIntent {
 
     companion object {
         val RENDERING_INTENT_UNKNOWN: Short = 0
@@ -573,7 +573,7 @@ native public trait SVGRenderingIntent {
     }
 }
 
-native public trait SVGStyleElement : SVGElement, SVGLangSpace {
+native public interface SVGStyleElement : SVGElement, SVGLangSpace {
     var type: dynamic
         get() = noImpl
         set(value) = noImpl
@@ -585,7 +585,7 @@ native public trait SVGStyleElement : SVGElement, SVGLangSpace {
         set(value) = noImpl
 }
 
-native public trait SVGPoint {
+native public interface SVGPoint {
     var x: dynamic
         get() = noImpl
         set(value) = noImpl
@@ -595,7 +595,7 @@ native public trait SVGPoint {
     fun matrixTransform(matrix: SVGMatrix): SVGPoint = noImpl
 }
 
-native public trait SVGPointList {
+native public interface SVGPointList {
     var numberOfItems: Int
         get() = noImpl
         set(value) = noImpl
@@ -608,7 +608,7 @@ native public trait SVGPointList {
     fun appendItem(newItem: SVGPoint): SVGPoint = noImpl
 }
 
-native public trait SVGMatrix {
+native public interface SVGMatrix {
     var a: dynamic
         get() = noImpl
         set(value) = noImpl
@@ -640,7 +640,7 @@ native public trait SVGMatrix {
     fun skewY(angle: Float): SVGMatrix = noImpl
 }
 
-native public trait SVGTransform {
+native public interface SVGTransform {
     var type: Short
         get() = noImpl
         set(value) = noImpl
@@ -668,7 +668,7 @@ native public trait SVGTransform {
     }
 }
 
-native public trait SVGTransformList {
+native public interface SVGTransformList {
     var numberOfItems: Int
         get() = noImpl
         set(value) = noImpl
@@ -683,7 +683,7 @@ native public trait SVGTransformList {
     fun consolidate(): SVGTransform = noImpl
 }
 
-native public trait SVGAnimatedTransformList {
+native public interface SVGAnimatedTransformList {
     var baseVal: SVGTransformList
         get() = noImpl
         set(value) = noImpl
@@ -692,7 +692,7 @@ native public trait SVGAnimatedTransformList {
         set(value) = noImpl
 }
 
-native public trait SVGPreserveAspectRatio {
+native public interface SVGPreserveAspectRatio {
     var align: dynamic
         get() = noImpl
         set(value) = noImpl
@@ -718,7 +718,7 @@ native public trait SVGPreserveAspectRatio {
     }
 }
 
-native public trait SVGAnimatedPreserveAspectRatio {
+native public interface SVGAnimatedPreserveAspectRatio {
     var baseVal: SVGPreserveAspectRatio
         get() = noImpl
         set(value) = noImpl
@@ -727,7 +727,7 @@ native public trait SVGAnimatedPreserveAspectRatio {
         set(value) = noImpl
 }
 
-native public trait SVGPathSeg {
+native public interface SVGPathSeg {
     var pathSegType: Short
         get() = noImpl
         set(value) = noImpl
@@ -759,10 +759,10 @@ native public trait SVGPathSeg {
     }
 }
 
-native public trait SVGPathSegClosePath : SVGPathSeg {
+native public interface SVGPathSegClosePath : SVGPathSeg {
 }
 
-native public trait SVGPathSegMovetoAbs : SVGPathSeg {
+native public interface SVGPathSegMovetoAbs : SVGPathSeg {
     var x: dynamic
         get() = noImpl
         set(value) = noImpl
@@ -771,7 +771,7 @@ native public trait SVGPathSegMovetoAbs : SVGPathSeg {
         set(value) = noImpl
 }
 
-native public trait SVGPathSegMovetoRel : SVGPathSeg {
+native public interface SVGPathSegMovetoRel : SVGPathSeg {
     var x: dynamic
         get() = noImpl
         set(value) = noImpl
@@ -780,7 +780,7 @@ native public trait SVGPathSegMovetoRel : SVGPathSeg {
         set(value) = noImpl
 }
 
-native public trait SVGPathSegLinetoAbs : SVGPathSeg {
+native public interface SVGPathSegLinetoAbs : SVGPathSeg {
     var x: dynamic
         get() = noImpl
         set(value) = noImpl
@@ -789,7 +789,7 @@ native public trait SVGPathSegLinetoAbs : SVGPathSeg {
         set(value) = noImpl
 }
 
-native public trait SVGPathSegLinetoRel : SVGPathSeg {
+native public interface SVGPathSegLinetoRel : SVGPathSeg {
     var x: dynamic
         get() = noImpl
         set(value) = noImpl
@@ -798,7 +798,7 @@ native public trait SVGPathSegLinetoRel : SVGPathSeg {
         set(value) = noImpl
 }
 
-native public trait SVGPathSegCurvetoCubicAbs : SVGPathSeg {
+native public interface SVGPathSegCurvetoCubicAbs : SVGPathSeg {
     var x: dynamic
         get() = noImpl
         set(value) = noImpl
@@ -819,7 +819,7 @@ native public trait SVGPathSegCurvetoCubicAbs : SVGPathSeg {
         set(value) = noImpl
 }
 
-native public trait SVGPathSegCurvetoCubicRel : SVGPathSeg {
+native public interface SVGPathSegCurvetoCubicRel : SVGPathSeg {
     var x: dynamic
         get() = noImpl
         set(value) = noImpl
@@ -840,7 +840,7 @@ native public trait SVGPathSegCurvetoCubicRel : SVGPathSeg {
         set(value) = noImpl
 }
 
-native public trait SVGPathSegCurvetoQuadraticAbs : SVGPathSeg {
+native public interface SVGPathSegCurvetoQuadraticAbs : SVGPathSeg {
     var x: dynamic
         get() = noImpl
         set(value) = noImpl
@@ -855,7 +855,7 @@ native public trait SVGPathSegCurvetoQuadraticAbs : SVGPathSeg {
         set(value) = noImpl
 }
 
-native public trait SVGPathSegCurvetoQuadraticRel : SVGPathSeg {
+native public interface SVGPathSegCurvetoQuadraticRel : SVGPathSeg {
     var x: dynamic
         get() = noImpl
         set(value) = noImpl
@@ -870,7 +870,7 @@ native public trait SVGPathSegCurvetoQuadraticRel : SVGPathSeg {
         set(value) = noImpl
 }
 
-native public trait SVGPathSegArcAbs : SVGPathSeg {
+native public interface SVGPathSegArcAbs : SVGPathSeg {
     var x: dynamic
         get() = noImpl
         set(value) = noImpl
@@ -894,7 +894,7 @@ native public trait SVGPathSegArcAbs : SVGPathSeg {
         set(value) = noImpl
 }
 
-native public trait SVGPathSegArcRel : SVGPathSeg {
+native public interface SVGPathSegArcRel : SVGPathSeg {
     var x: dynamic
         get() = noImpl
         set(value) = noImpl
@@ -918,31 +918,31 @@ native public trait SVGPathSegArcRel : SVGPathSeg {
         set(value) = noImpl
 }
 
-native public trait SVGPathSegLinetoHorizontalAbs : SVGPathSeg {
+native public interface SVGPathSegLinetoHorizontalAbs : SVGPathSeg {
     var x: dynamic
         get() = noImpl
         set(value) = noImpl
 }
 
-native public trait SVGPathSegLinetoHorizontalRel : SVGPathSeg {
+native public interface SVGPathSegLinetoHorizontalRel : SVGPathSeg {
     var x: dynamic
         get() = noImpl
         set(value) = noImpl
 }
 
-native public trait SVGPathSegLinetoVerticalAbs : SVGPathSeg {
+native public interface SVGPathSegLinetoVerticalAbs : SVGPathSeg {
     var y: dynamic
         get() = noImpl
         set(value) = noImpl
 }
 
-native public trait SVGPathSegLinetoVerticalRel : SVGPathSeg {
+native public interface SVGPathSegLinetoVerticalRel : SVGPathSeg {
     var y: dynamic
         get() = noImpl
         set(value) = noImpl
 }
 
-native public trait SVGPathSegCurvetoCubicSmoothAbs : SVGPathSeg {
+native public interface SVGPathSegCurvetoCubicSmoothAbs : SVGPathSeg {
     var x: dynamic
         get() = noImpl
         set(value) = noImpl
@@ -957,7 +957,7 @@ native public trait SVGPathSegCurvetoCubicSmoothAbs : SVGPathSeg {
         set(value) = noImpl
 }
 
-native public trait SVGPathSegCurvetoCubicSmoothRel : SVGPathSeg {
+native public interface SVGPathSegCurvetoCubicSmoothRel : SVGPathSeg {
     var x: dynamic
         get() = noImpl
         set(value) = noImpl
@@ -972,7 +972,7 @@ native public trait SVGPathSegCurvetoCubicSmoothRel : SVGPathSeg {
         set(value) = noImpl
 }
 
-native public trait SVGPathSegCurvetoQuadraticSmoothAbs : SVGPathSeg {
+native public interface SVGPathSegCurvetoQuadraticSmoothAbs : SVGPathSeg {
     var x: dynamic
         get() = noImpl
         set(value) = noImpl
@@ -981,7 +981,7 @@ native public trait SVGPathSegCurvetoQuadraticSmoothAbs : SVGPathSeg {
         set(value) = noImpl
 }
 
-native public trait SVGPathSegCurvetoQuadraticSmoothRel : SVGPathSeg {
+native public interface SVGPathSegCurvetoQuadraticSmoothRel : SVGPathSeg {
     var x: dynamic
         get() = noImpl
         set(value) = noImpl
@@ -990,7 +990,7 @@ native public trait SVGPathSegCurvetoQuadraticSmoothRel : SVGPathSeg {
         set(value) = noImpl
 }
 
-native public trait SVGPathSegList {
+native public interface SVGPathSegList {
     var numberOfItems: Int
         get() = noImpl
         set(value) = noImpl
@@ -1003,7 +1003,7 @@ native public trait SVGPathSegList {
     fun appendItem(newItem: SVGPathSeg): SVGPathSeg = noImpl
 }
 
-native public trait SVGAnimatedPathData {
+native public interface SVGAnimatedPathData {
     var pathSegList: SVGPathSegList
         get() = noImpl
         set(value) = noImpl
@@ -1018,7 +1018,7 @@ native public trait SVGAnimatedPathData {
         set(value) = noImpl
 }
 
-native public trait SVGPathElement : SVGElement, SVGTests, SVGLangSpace, SVGExternalResourcesRequired, SVGStylable, SVGTransformable, SVGAnimatedPathData {
+native public interface SVGPathElement : SVGElement, SVGTests, SVGLangSpace, SVGExternalResourcesRequired, SVGStylable, SVGTransformable, SVGAnimatedPathData {
     var pathLength: SVGAnimatedNumber
         get() = noImpl
         set(value) = noImpl
@@ -1046,7 +1046,7 @@ native public trait SVGPathElement : SVGElement, SVGTests, SVGLangSpace, SVGExte
     fun createSVGPathSegCurvetoQuadraticSmoothRel(x: Float, y: Float): SVGPathSegCurvetoQuadraticSmoothRel = noImpl
 }
 
-native public trait SVGRectElement : SVGElement, SVGTests, SVGLangSpace, SVGExternalResourcesRequired, SVGStylable, SVGTransformable {
+native public interface SVGRectElement : SVGElement, SVGTests, SVGLangSpace, SVGExternalResourcesRequired, SVGStylable, SVGTransformable {
     var x: SVGAnimatedLength
         get() = noImpl
         set(value) = noImpl
@@ -1067,7 +1067,7 @@ native public trait SVGRectElement : SVGElement, SVGTests, SVGLangSpace, SVGExte
         set(value) = noImpl
 }
 
-native public trait SVGCircleElement : SVGElement, SVGTests, SVGLangSpace, SVGExternalResourcesRequired, SVGStylable, SVGTransformable {
+native public interface SVGCircleElement : SVGElement, SVGTests, SVGLangSpace, SVGExternalResourcesRequired, SVGStylable, SVGTransformable {
     var cx: SVGAnimatedLength
         get() = noImpl
         set(value) = noImpl
@@ -1079,7 +1079,7 @@ native public trait SVGCircleElement : SVGElement, SVGTests, SVGLangSpace, SVGEx
         set(value) = noImpl
 }
 
-native public trait SVGEllipseElement : SVGElement, SVGTests, SVGLangSpace, SVGExternalResourcesRequired, SVGStylable, SVGTransformable {
+native public interface SVGEllipseElement : SVGElement, SVGTests, SVGLangSpace, SVGExternalResourcesRequired, SVGStylable, SVGTransformable {
     var cx: SVGAnimatedLength
         get() = noImpl
         set(value) = noImpl
@@ -1094,7 +1094,7 @@ native public trait SVGEllipseElement : SVGElement, SVGTests, SVGLangSpace, SVGE
         set(value) = noImpl
 }
 
-native public trait SVGLineElement : SVGElement, SVGTests, SVGLangSpace, SVGExternalResourcesRequired, SVGStylable, SVGTransformable {
+native public interface SVGLineElement : SVGElement, SVGTests, SVGLangSpace, SVGExternalResourcesRequired, SVGStylable, SVGTransformable {
     var x1: SVGAnimatedLength
         get() = noImpl
         set(value) = noImpl
@@ -1109,7 +1109,7 @@ native public trait SVGLineElement : SVGElement, SVGTests, SVGLangSpace, SVGExte
         set(value) = noImpl
 }
 
-native public trait SVGAnimatedPoints {
+native public interface SVGAnimatedPoints {
     var points: SVGPointList
         get() = noImpl
         set(value) = noImpl
@@ -1118,13 +1118,13 @@ native public trait SVGAnimatedPoints {
         set(value) = noImpl
 }
 
-native public trait SVGPolylineElement : SVGElement, SVGTests, SVGLangSpace, SVGExternalResourcesRequired, SVGStylable, SVGTransformable, SVGAnimatedPoints {
+native public interface SVGPolylineElement : SVGElement, SVGTests, SVGLangSpace, SVGExternalResourcesRequired, SVGStylable, SVGTransformable, SVGAnimatedPoints {
 }
 
-native public trait SVGPolygonElement : SVGElement, SVGTests, SVGLangSpace, SVGExternalResourcesRequired, SVGStylable, SVGTransformable, SVGAnimatedPoints {
+native public interface SVGPolygonElement : SVGElement, SVGTests, SVGLangSpace, SVGExternalResourcesRequired, SVGStylable, SVGTransformable, SVGAnimatedPoints {
 }
 
-native public trait SVGTextContentElement : SVGElement, SVGTests, SVGLangSpace, SVGExternalResourcesRequired, SVGStylable {
+native public interface SVGTextContentElement : SVGElement, SVGTests, SVGLangSpace, SVGExternalResourcesRequired, SVGStylable {
     var textLength: SVGAnimatedLength
         get() = noImpl
         set(value) = noImpl
@@ -1148,7 +1148,7 @@ native public trait SVGTextContentElement : SVGElement, SVGTests, SVGLangSpace,
     }
 }
 
-native public trait SVGTextPositioningElement : SVGTextContentElement {
+native public interface SVGTextPositioningElement : SVGTextContentElement {
     var x: SVGAnimatedLengthList
         get() = noImpl
         set(value) = noImpl
@@ -1166,16 +1166,16 @@ native public trait SVGTextPositioningElement : SVGTextContentElement {
         set(value) = noImpl
 }
 
-native public trait SVGTextElement : SVGTextPositioningElement, SVGTransformable {
+native public interface SVGTextElement : SVGTextPositioningElement, SVGTransformable {
 }
 
-native public trait SVGTSpanElement : SVGTextPositioningElement {
+native public interface SVGTSpanElement : SVGTextPositioningElement {
 }
 
-native public trait SVGTRefElement : SVGTextPositioningElement, SVGURIReference {
+native public interface SVGTRefElement : SVGTextPositioningElement, SVGURIReference {
 }
 
-native public trait SVGTextPathElement : SVGTextContentElement, SVGURIReference {
+native public interface SVGTextPathElement : SVGTextContentElement, SVGURIReference {
     var startOffset: SVGAnimatedLength
         get() = noImpl
         set(value) = noImpl
@@ -1196,7 +1196,7 @@ native public trait SVGTextPathElement : SVGTextContentElement, SVGURIReference
     }
 }
 
-native public trait SVGAltGlyphElement : SVGTextPositioningElement, SVGURIReference {
+native public interface SVGAltGlyphElement : SVGTextPositioningElement, SVGURIReference {
     var glyphRef: dynamic
         get() = noImpl
         set(value) = noImpl
@@ -1205,13 +1205,13 @@ native public trait SVGAltGlyphElement : SVGTextPositioningElement, SVGURIRefere
         set(value) = noImpl
 }
 
-native public trait SVGAltGlyphDefElement : SVGElement {
+native public interface SVGAltGlyphDefElement : SVGElement {
 }
 
-native public trait SVGAltGlyphItemElement : SVGElement {
+native public interface SVGAltGlyphItemElement : SVGElement {
 }
 
-native public trait SVGGlyphRefElement : SVGElement, SVGURIReference, SVGStylable {
+native public interface SVGGlyphRefElement : SVGElement, SVGURIReference, SVGStylable {
     var glyphRef: dynamic
         get() = noImpl
         set(value) = noImpl
@@ -1232,7 +1232,7 @@ native public trait SVGGlyphRefElement : SVGElement, SVGURIReference, SVGStylabl
         set(value) = noImpl
 }
 
-native public trait SVGPaint : SVGColor {
+native public interface SVGPaint : SVGColor {
     var paintType: Short
         get() = noImpl
         set(value) = noImpl
@@ -1256,7 +1256,7 @@ native public trait SVGPaint : SVGColor {
     }
 }
 
-native public trait SVGMarkerElement : SVGElement, SVGLangSpace, SVGExternalResourcesRequired, SVGStylable, SVGFitToViewBox {
+native public interface SVGMarkerElement : SVGElement, SVGLangSpace, SVGExternalResourcesRequired, SVGStylable, SVGFitToViewBox {
     var refX: SVGAnimatedLength
         get() = noImpl
         set(value) = noImpl
@@ -1291,7 +1291,7 @@ native public trait SVGMarkerElement : SVGElement, SVGLangSpace, SVGExternalReso
     }
 }
 
-native public trait SVGColorProfileElement : SVGElement, SVGURIReference, SVGRenderingIntent {
+native public interface SVGColorProfileElement : SVGElement, SVGURIReference, SVGRenderingIntent {
     var local: String
         get() = noImpl
         set(value) = noImpl
@@ -1303,7 +1303,7 @@ native public trait SVGColorProfileElement : SVGElement, SVGURIReference, SVGRen
         set(value) = noImpl
 }
 
-native public trait SVGColorProfileRule : SVGCSSRule, SVGRenderingIntent {
+native public interface SVGColorProfileRule : SVGCSSRule, SVGRenderingIntent {
     var src: dynamic
         get() = noImpl
         set(value) = noImpl
@@ -1315,7 +1315,7 @@ native public trait SVGColorProfileRule : SVGCSSRule, SVGRenderingIntent {
         set(value) = noImpl
 }
 
-native public trait SVGGradientElement : SVGElement, SVGURIReference, SVGExternalResourcesRequired, SVGStylable, SVGUnitTypes {
+native public interface SVGGradientElement : SVGElement, SVGURIReference, SVGExternalResourcesRequired, SVGStylable, SVGUnitTypes {
     var gradientUnits: SVGAnimatedEnumeration
         get() = noImpl
         set(value) = noImpl
@@ -1334,7 +1334,7 @@ native public trait SVGGradientElement : SVGElement, SVGURIReference, SVGExterna
     }
 }
 
-native public trait SVGLinearGradientElement : SVGGradientElement {
+native public interface SVGLinearGradientElement : SVGGradientElement {
     var x1: SVGAnimatedLength
         get() = noImpl
         set(value) = noImpl
@@ -1349,7 +1349,7 @@ native public trait SVGLinearGradientElement : SVGGradientElement {
         set(value) = noImpl
 }
 
-native public trait SVGRadialGradientElement : SVGGradientElement {
+native public interface SVGRadialGradientElement : SVGGradientElement {
     var cx: SVGAnimatedLength
         get() = noImpl
         set(value) = noImpl
@@ -1367,13 +1367,13 @@ native public trait SVGRadialGradientElement : SVGGradientElement {
         set(value) = noImpl
 }
 
-native public trait SVGStopElement : SVGElement, SVGStylable {
+native public interface SVGStopElement : SVGElement, SVGStylable {
     var offset: SVGAnimatedNumber
         get() = noImpl
         set(value) = noImpl
 }
 
-native public trait SVGPatternElement : SVGElement, SVGURIReference, SVGTests, SVGLangSpace, SVGExternalResourcesRequired, SVGStylable, SVGFitToViewBox, SVGUnitTypes {
+native public interface SVGPatternElement : SVGElement, SVGURIReference, SVGTests, SVGLangSpace, SVGExternalResourcesRequired, SVGStylable, SVGFitToViewBox, SVGUnitTypes {
     var patternUnits: SVGAnimatedEnumeration
         get() = noImpl
         set(value) = noImpl
@@ -1397,13 +1397,13 @@ native public trait SVGPatternElement : SVGElement, SVGURIReference, SVGTests, S
         set(value) = noImpl
 }
 
-native public trait SVGClipPathElement : SVGElement, SVGTests, SVGLangSpace, SVGExternalResourcesRequired, SVGStylable, SVGTransformable, SVGUnitTypes {
+native public interface SVGClipPathElement : SVGElement, SVGTests, SVGLangSpace, SVGExternalResourcesRequired, SVGStylable, SVGTransformable, SVGUnitTypes {
     var clipPathUnits: SVGAnimatedEnumeration
         get() = noImpl
         set(value) = noImpl
 }
 
-native public trait SVGMaskElement : SVGElement, SVGTests, SVGLangSpace, SVGExternalResourcesRequired, SVGStylable, SVGUnitTypes {
+native public interface SVGMaskElement : SVGElement, SVGTests, SVGLangSpace, SVGExternalResourcesRequired, SVGStylable, SVGUnitTypes {
     var maskUnits: SVGAnimatedEnumeration
         get() = noImpl
         set(value) = noImpl
@@ -1424,7 +1424,7 @@ native public trait SVGMaskElement : SVGElement, SVGTests, SVGLangSpace, SVGExte
         set(value) = noImpl
 }
 
-native public trait SVGFilterElement : SVGElement, SVGURIReference, SVGLangSpace, SVGExternalResourcesRequired, SVGStylable, SVGUnitTypes {
+native public interface SVGFilterElement : SVGElement, SVGURIReference, SVGLangSpace, SVGExternalResourcesRequired, SVGStylable, SVGUnitTypes {
     var filterUnits: SVGAnimatedEnumeration
         get() = noImpl
         set(value) = noImpl
@@ -1452,7 +1452,7 @@ native public trait SVGFilterElement : SVGElement, SVGURIReference, SVGLangSpace
     fun setFilterRes(filterResX: Int, filterResY: Int): Unit = noImpl
 }
 
-native public trait SVGFilterPrimitiveStandardAttributes : SVGStylable {
+native public interface SVGFilterPrimitiveStandardAttributes : SVGStylable {
     var x: SVGAnimatedLength
         get() = noImpl
         set(value) = noImpl
@@ -1470,7 +1470,7 @@ native public trait SVGFilterPrimitiveStandardAttributes : SVGStylable {
         set(value) = noImpl
 }
 
-native public trait SVGFEBlendElement : SVGElement, SVGFilterPrimitiveStandardAttributes {
+native public interface SVGFEBlendElement : SVGElement, SVGFilterPrimitiveStandardAttributes {
     var in1: SVGAnimatedString
         get() = noImpl
         set(value) = noImpl
@@ -1491,7 +1491,7 @@ native public trait SVGFEBlendElement : SVGElement, SVGFilterPrimitiveStandardAt
     }
 }
 
-native public trait SVGFEColorMatrixElement : SVGElement, SVGFilterPrimitiveStandardAttributes {
+native public interface SVGFEColorMatrixElement : SVGElement, SVGFilterPrimitiveStandardAttributes {
     var in1: SVGAnimatedString
         get() = noImpl
         set(value) = noImpl
@@ -1511,13 +1511,13 @@ native public trait SVGFEColorMatrixElement : SVGElement, SVGFilterPrimitiveStan
     }
 }
 
-native public trait SVGFEComponentTransferElement : SVGElement, SVGFilterPrimitiveStandardAttributes {
+native public interface SVGFEComponentTransferElement : SVGElement, SVGFilterPrimitiveStandardAttributes {
     var in1: SVGAnimatedString
         get() = noImpl
         set(value) = noImpl
 }
 
-native public trait SVGComponentTransferFunctionElement : SVGElement {
+native public interface SVGComponentTransferFunctionElement : SVGElement {
     var type: SVGAnimatedEnumeration
         get() = noImpl
         set(value) = noImpl
@@ -1550,19 +1550,19 @@ native public trait SVGComponentTransferFunctionElement : SVGElement {
     }
 }
 
-native public trait SVGFEFuncRElement : SVGComponentTransferFunctionElement {
+native public interface SVGFEFuncRElement : SVGComponentTransferFunctionElement {
 }
 
-native public trait SVGFEFuncGElement : SVGComponentTransferFunctionElement {
+native public interface SVGFEFuncGElement : SVGComponentTransferFunctionElement {
 }
 
-native public trait SVGFEFuncBElement : SVGComponentTransferFunctionElement {
+native public interface SVGFEFuncBElement : SVGComponentTransferFunctionElement {
 }
 
-native public trait SVGFEFuncAElement : SVGComponentTransferFunctionElement {
+native public interface SVGFEFuncAElement : SVGComponentTransferFunctionElement {
 }
 
-native public trait SVGFECompositeElement : SVGElement, SVGFilterPrimitiveStandardAttributes {
+native public interface SVGFECompositeElement : SVGElement, SVGFilterPrimitiveStandardAttributes {
     var in1: SVGAnimatedString
         get() = noImpl
         set(value) = noImpl
@@ -1596,7 +1596,7 @@ native public trait SVGFECompositeElement : SVGElement, SVGFilterPrimitiveStanda
     }
 }
 
-native public trait SVGFEConvolveMatrixElement : SVGElement, SVGFilterPrimitiveStandardAttributes {
+native public interface SVGFEConvolveMatrixElement : SVGElement, SVGFilterPrimitiveStandardAttributes {
     var in1: SVGAnimatedString
         get() = noImpl
         set(value) = noImpl
@@ -1642,7 +1642,7 @@ native public trait SVGFEConvolveMatrixElement : SVGElement, SVGFilterPrimitiveS
     }
 }
 
-native public trait SVGFEDiffuseLightingElement : SVGElement, SVGFilterPrimitiveStandardAttributes {
+native public interface SVGFEDiffuseLightingElement : SVGElement, SVGFilterPrimitiveStandardAttributes {
     var in1: SVGAnimatedString
         get() = noImpl
         set(value) = noImpl
@@ -1660,7 +1660,7 @@ native public trait SVGFEDiffuseLightingElement : SVGElement, SVGFilterPrimitive
         set(value) = noImpl
 }
 
-native public trait SVGFEDistantLightElement : SVGElement {
+native public interface SVGFEDistantLightElement : SVGElement {
     var azimuth: SVGAnimatedNumber
         get() = noImpl
         set(value) = noImpl
@@ -1669,7 +1669,7 @@ native public trait SVGFEDistantLightElement : SVGElement {
         set(value) = noImpl
 }
 
-native public trait SVGFEPointLightElement : SVGElement {
+native public interface SVGFEPointLightElement : SVGElement {
     var x: SVGAnimatedNumber
         get() = noImpl
         set(value) = noImpl
@@ -1681,7 +1681,7 @@ native public trait SVGFEPointLightElement : SVGElement {
         set(value) = noImpl
 }
 
-native public trait SVGFESpotLightElement : SVGElement {
+native public interface SVGFESpotLightElement : SVGElement {
     var x: SVGAnimatedNumber
         get() = noImpl
         set(value) = noImpl
@@ -1708,7 +1708,7 @@ native public trait SVGFESpotLightElement : SVGElement {
         set(value) = noImpl
 }
 
-native public trait SVGFEDisplacementMapElement : SVGElement, SVGFilterPrimitiveStandardAttributes {
+native public interface SVGFEDisplacementMapElement : SVGElement, SVGFilterPrimitiveStandardAttributes {
     var in1: SVGAnimatedString
         get() = noImpl
         set(value) = noImpl
@@ -1734,10 +1734,10 @@ native public trait SVGFEDisplacementMapElement : SVGElement, SVGFilterPrimitive
     }
 }
 
-native public trait SVGFEFloodElement : SVGElement, SVGFilterPrimitiveStandardAttributes {
+native public interface SVGFEFloodElement : SVGElement, SVGFilterPrimitiveStandardAttributes {
 }
 
-native public trait SVGFEGaussianBlurElement : SVGElement, SVGFilterPrimitiveStandardAttributes {
+native public interface SVGFEGaussianBlurElement : SVGElement, SVGFilterPrimitiveStandardAttributes {
     var in1: SVGAnimatedString
         get() = noImpl
         set(value) = noImpl
@@ -1750,22 +1750,22 @@ native public trait SVGFEGaussianBlurElement : SVGElement, SVGFilterPrimitiveSta
     fun setStdDeviation(stdDeviationX: Float, stdDeviationY: Float): Unit = noImpl
 }
 
-native public trait SVGFEImageElement : SVGElement, SVGURIReference, SVGLangSpace, SVGExternalResourcesRequired, SVGFilterPrimitiveStandardAttributes {
+native public interface SVGFEImageElement : SVGElement, SVGURIReference, SVGLangSpace, SVGExternalResourcesRequired, SVGFilterPrimitiveStandardAttributes {
     var preserveAspectRatio: SVGAnimatedPreserveAspectRatio
         get() = noImpl
         set(value) = noImpl
 }
 
-native public trait SVGFEMergeElement : SVGElement, SVGFilterPrimitiveStandardAttributes {
+native public interface SVGFEMergeElement : SVGElement, SVGFilterPrimitiveStandardAttributes {
 }
 
-native public trait SVGFEMergeNodeElement : SVGElement {
+native public interface SVGFEMergeNodeElement : SVGElement {
     var in1: SVGAnimatedString
         get() = noImpl
         set(value) = noImpl
 }
 
-native public trait SVGFEMorphologyElement : SVGElement, SVGFilterPrimitiveStandardAttributes {
+native public interface SVGFEMorphologyElement : SVGElement, SVGFilterPrimitiveStandardAttributes {
     var in1: SVGAnimatedString
         get() = noImpl
         set(value) = noImpl
@@ -1786,7 +1786,7 @@ native public trait SVGFEMorphologyElement : SVGElement, SVGFilterPrimitiveStand
     }
 }
 
-native public trait SVGFEOffsetElement : SVGElement, SVGFilterPrimitiveStandardAttributes {
+native public interface SVGFEOffsetElement : SVGElement, SVGFilterPrimitiveStandardAttributes {
     var in1: SVGAnimatedString
         get() = noImpl
         set(value) = noImpl
@@ -1798,7 +1798,7 @@ native public trait SVGFEOffsetElement : SVGElement, SVGFilterPrimitiveStandardA
         set(value) = noImpl
 }
 
-native public trait SVGFESpecularLightingElement : SVGElement, SVGFilterPrimitiveStandardAttributes {
+native public interface SVGFESpecularLightingElement : SVGElement, SVGFilterPrimitiveStandardAttributes {
     var in1: SVGAnimatedString
         get() = noImpl
         set(value) = noImpl
@@ -1819,13 +1819,13 @@ native public trait SVGFESpecularLightingElement : SVGElement, SVGFilterPrimitiv
         set(value) = noImpl
 }
 
-native public trait SVGFETileElement : SVGElement, SVGFilterPrimitiveStandardAttributes {
+native public interface SVGFETileElement : SVGElement, SVGFilterPrimitiveStandardAttributes {
     var in1: SVGAnimatedString
         get() = noImpl
         set(value) = noImpl
 }
 
-native public trait SVGFETurbulenceElement : SVGElement, SVGFilterPrimitiveStandardAttributes {
+native public interface SVGFETurbulenceElement : SVGElement, SVGFilterPrimitiveStandardAttributes {
     var baseFrequencyX: SVGAnimatedNumber
         get() = noImpl
         set(value) = noImpl
@@ -1855,7 +1855,7 @@ native public trait SVGFETurbulenceElement : SVGElement, SVGFilterPrimitiveStand
     }
 }
 
-native public trait SVGCursorElement : SVGElement, SVGURIReference, SVGTests, SVGExternalResourcesRequired {
+native public interface SVGCursorElement : SVGElement, SVGURIReference, SVGTests, SVGExternalResourcesRequired {
     var x: SVGAnimatedLength
         get() = noImpl
         set(value) = noImpl
@@ -1864,19 +1864,19 @@ native public trait SVGCursorElement : SVGElement, SVGURIReference, SVGTests, SV
         set(value) = noImpl
 }
 
-native public trait SVGAElement : SVGElement, SVGURIReference, SVGTests, SVGLangSpace, SVGExternalResourcesRequired, SVGStylable, SVGTransformable {
+native public interface SVGAElement : SVGElement, SVGURIReference, SVGTests, SVGLangSpace, SVGExternalResourcesRequired, SVGStylable, SVGTransformable {
     var target: SVGAnimatedString
         get() = noImpl
         set(value) = noImpl
 }
 
-native public trait SVGViewElement : SVGElement, SVGExternalResourcesRequired, SVGFitToViewBox, SVGZoomAndPan {
+native public interface SVGViewElement : SVGElement, SVGExternalResourcesRequired, SVGFitToViewBox, SVGZoomAndPan {
     var viewTarget: SVGStringList
         get() = noImpl
         set(value) = noImpl
 }
 
-native public trait SVGScriptElement : SVGElement, SVGURIReference, SVGExternalResourcesRequired {
+native public interface SVGScriptElement : SVGElement, SVGURIReference, SVGExternalResourcesRequired {
     var type: dynamic
         get() = noImpl
         set(value) = noImpl
@@ -1900,7 +1900,7 @@ native public open class SVGZoomEvent : UIEvent(noImpl, noImpl) {
         set(value) = noImpl
 }
 
-native public trait ElementTimeControl {
+native public interface ElementTimeControl {
     fun beginElement(): Unit = noImpl
     fun beginElementAt(offset: Float): Unit = noImpl
     fun endElement(): Unit = noImpl
@@ -1917,7 +1917,7 @@ native public open class TimeEvent : Event(noImpl, noImpl) {
     fun initTimeEvent(typeArg: String, viewArg: dynamic, detailArg: Int): Unit = noImpl
 }
 
-native public trait SVGAnimationElement : SVGElement, SVGTests, SVGExternalResourcesRequired, ElementTimeControl {
+native public interface SVGAnimationElement : SVGElement, SVGTests, SVGExternalResourcesRequired, ElementTimeControl {
     var targetElement: SVGElement
         get() = noImpl
         set(value) = noImpl
@@ -1926,58 +1926,58 @@ native public trait SVGAnimationElement : SVGElement, SVGTests, SVGExternalResou
     fun getSimpleDuration(): Float = noImpl
 }
 
-native public trait SVGAnimateElement : SVGAnimationElement, SVGStylable {
+native public interface SVGAnimateElement : SVGAnimationElement, SVGStylable {
 }
 
-native public trait SVGSetElement : SVGAnimationElement {
+native public interface SVGSetElement : SVGAnimationElement {
 }
 
-native public trait SVGAnimateMotionElement : SVGAnimationElement {
+native public interface SVGAnimateMotionElement : SVGAnimationElement {
 }
 
-native public trait SVGMPathElement : SVGElement, SVGURIReference, SVGExternalResourcesRequired {
+native public interface SVGMPathElement : SVGElement, SVGURIReference, SVGExternalResourcesRequired {
 }
 
-native public trait SVGAnimateColorElement : SVGAnimationElement, SVGStylable {
+native public interface SVGAnimateColorElement : SVGAnimationElement, SVGStylable {
 }
 
-native public trait SVGAnimateTransformElement : SVGAnimationElement {
+native public interface SVGAnimateTransformElement : SVGAnimationElement {
 }
 
-native public trait SVGFontElement : SVGElement, SVGExternalResourcesRequired, SVGStylable {
+native public interface SVGFontElement : SVGElement, SVGExternalResourcesRequired, SVGStylable {
 }
 
-native public trait SVGGlyphElement : SVGElement, SVGStylable {
+native public interface SVGGlyphElement : SVGElement, SVGStylable {
 }
 
-native public trait SVGMissingGlyphElement : SVGElement, SVGStylable {
+native public interface SVGMissingGlyphElement : SVGElement, SVGStylable {
 }
 
-native public trait SVGHKernElement : SVGElement {
+native public interface SVGHKernElement : SVGElement {
 }
 
-native public trait SVGVKernElement : SVGElement {
+native public interface SVGVKernElement : SVGElement {
 }
 
-native public trait SVGFontFaceElement : SVGElement {
+native public interface SVGFontFaceElement : SVGElement {
 }
 
-native public trait SVGFontFaceSrcElement : SVGElement {
+native public interface SVGFontFaceSrcElement : SVGElement {
 }
 
-native public trait SVGFontFaceUriElement : SVGElement {
+native public interface SVGFontFaceUriElement : SVGElement {
 }
 
-native public trait SVGFontFaceFormatElement : SVGElement {
+native public interface SVGFontFaceFormatElement : SVGElement {
 }
 
-native public trait SVGFontFaceNameElement : SVGElement {
+native public interface SVGFontFaceNameElement : SVGElement {
 }
 
-native public trait SVGMetadataElement : SVGElement {
+native public interface SVGMetadataElement : SVGElement {
 }
 
-native public trait SVGForeignObjectElement : SVGElement, SVGTests, SVGLangSpace, SVGExternalResourcesRequired, SVGStylable, SVGTransformable {
+native public interface SVGForeignObjectElement : SVGElement, SVGTests, SVGLangSpace, SVGExternalResourcesRequired, SVGStylable, SVGTransformable {
     var x: SVGAnimatedLength
         get() = noImpl
         set(value) = noImpl
diff --git a/js/js.libraries/src/generated/org.w3c.files.kt b/js/js.libraries/src/generated/org.w3c.files.kt
index e187a5aff83..7a75e445002 100644
--- a/js/js.libraries/src/generated/org.w3c.files.kt
+++ b/js/js.libraries/src/generated/org.w3c.files.kt
@@ -51,7 +51,7 @@ native public open class FilePropertyBag {
     var lastModified: Long
 }
 
-native public trait FileList {
+native public interface FileList {
     var length: Int
         get() = noImpl
         set(value) = noImpl
@@ -105,6 +105,6 @@ native public open class FileReaderSync {
     fun readAsDataURL(blob: Blob): String = noImpl
 }
 
-native public trait URL {
+native public interface URL {
 }
 
diff --git a/js/js.libraries/src/generated/org.w3c.performance.kt b/js/js.libraries/src/generated/org.w3c.performance.kt
index c66a6e36697..b9adeaa62ac 100644
--- a/js/js.libraries/src/generated/org.w3c.performance.kt
+++ b/js/js.libraries/src/generated/org.w3c.performance.kt
@@ -19,7 +19,7 @@ import org.w3c.notifications.*
 import org.w3c.workers.*
 import org.w3c.xhr.*
 
-native public trait Performance {
+native public interface Performance {
     var timing: PerformanceTiming
         get() = noImpl
         set(value) = noImpl
@@ -29,7 +29,7 @@ native public trait Performance {
     fun now(): Double = noImpl
 }
 
-native public trait PerformanceTiming {
+native public interface PerformanceTiming {
     var navigationStart: Long
         get() = noImpl
         set(value) = noImpl
@@ -95,7 +95,7 @@ native public trait PerformanceTiming {
         set(value) = noImpl
 }
 
-native public trait PerformanceNavigation {
+native public interface PerformanceNavigation {
     var type: Short
         get() = noImpl
         set(value) = noImpl
diff --git a/js/js.libraries/src/generated/org.w3c.workers.kt b/js/js.libraries/src/generated/org.w3c.workers.kt
index 4aff1e44250..476998d7df1 100644
--- a/js/js.libraries/src/generated/org.w3c.workers.kt
+++ b/js/js.libraries/src/generated/org.w3c.workers.kt
@@ -19,7 +19,7 @@ import org.w3c.notifications.*
 import org.w3c.performance.*
 import org.w3c.xhr.*
 
-native public trait ServiceWorkerRegistration : EventTarget {
+native public interface ServiceWorkerRegistration : EventTarget {
     var installing: ServiceWorker?
         get() = noImpl
         set(value) = noImpl
@@ -45,7 +45,7 @@ native public trait ServiceWorkerRegistration : EventTarget {
     fun getNotifications(filter: GetNotificationOptions = noImpl): dynamic = noImpl
 }
 
-native public trait ServiceWorkerGlobalScope : WorkerGlobalScope {
+native public interface ServiceWorkerGlobalScope : WorkerGlobalScope {
     var clients: Clients
         get() = noImpl
         set(value) = noImpl
@@ -73,7 +73,7 @@ native public trait ServiceWorkerGlobalScope : WorkerGlobalScope {
     fun skipWaiting(): dynamic = noImpl
 }
 
-native public trait ServiceWorker : EventTarget, UnionMessagePortOrServiceWorker, UnionClientOrMessagePortOrServiceWorker {
+native public interface ServiceWorker : EventTarget, UnionMessagePortOrServiceWorker, UnionClientOrMessagePortOrServiceWorker {
     var scriptURL: String
         get() = noImpl
         set(value) = noImpl
@@ -92,7 +92,7 @@ native public trait ServiceWorker : EventTarget, UnionMessagePortOrServiceWorker
     fun postMessage(message: Any?, transfer: Array<Transferable> = noImpl): Unit = noImpl
 }
 
-native public trait ServiceWorkerContainer : EventTarget {
+native public interface ServiceWorkerContainer : EventTarget {
     var controller: ServiceWorker?
         get() = noImpl
         set(value) = noImpl
@@ -144,7 +144,7 @@ native public open class ServiceWorkerMessageEventInit : EventInit() {
     var ports: Array<MessagePort>
 }
 
-native public trait Client : UnionClientOrMessagePortOrServiceWorker {
+native public interface Client : UnionClientOrMessagePortOrServiceWorker {
     var url: String
         get() = noImpl
         set(value) = noImpl
@@ -157,7 +157,7 @@ native public trait Client : UnionClientOrMessagePortOrServiceWorker {
     fun postMessage(message: Any?, transfer: Array<Transferable> = noImpl): Unit = noImpl
 }
 
-native public trait WindowClient : Client {
+native public interface WindowClient : Client {
     var visibilityState: dynamic
         get() = noImpl
         set(value) = noImpl
@@ -167,7 +167,7 @@ native public trait WindowClient : Client {
     fun focus(): dynamic = noImpl
 }
 
-native public trait Clients {
+native public interface Clients {
     fun matchAll(options: ClientQueryOptions = noImpl): dynamic = noImpl
     fun openWindow(url: String): dynamic = noImpl
     fun claim(): dynamic = noImpl
@@ -231,7 +231,7 @@ native public open class ExtendableMessageEventInit : ExtendableEventInit() {
     var ports: Array<MessagePort>
 }
 
-native public trait Cache {
+native public interface Cache {
     fun match(request: dynamic, options: CacheQueryOptions = noImpl): dynamic = noImpl
     fun matchAll(request: dynamic = noImpl, options: CacheQueryOptions = noImpl): dynamic = noImpl
     fun add(request: dynamic): dynamic = noImpl
@@ -255,7 +255,7 @@ native public open class CacheBatchOperation {
     var options: CacheQueryOptions
 }
 
-native public trait CacheStorage {
+native public interface CacheStorage {
     fun match(request: dynamic, options: CacheQueryOptions = noImpl): dynamic = noImpl
     fun has(cacheName: String): dynamic = noImpl
     fun open(cacheName: String): dynamic = noImpl
@@ -266,9 +266,9 @@ native public trait CacheStorage {
 native public open class FunctionalEvent : ExtendableEvent(noImpl, noImpl) {
 }
 
-native public marker trait UnionMessagePortOrServiceWorker {
+native public marker interface UnionMessagePortOrServiceWorker {
 }
 
-native public marker trait UnionClientOrMessagePortOrServiceWorker {
+native public marker interface UnionClientOrMessagePortOrServiceWorker {
 }
 
diff --git a/js/js.libraries/src/generated/org.w3c.xhr.kt b/js/js.libraries/src/generated/org.w3c.xhr.kt
index 68dd911f80e..63cce9968ec 100644
--- a/js/js.libraries/src/generated/org.w3c.xhr.kt
+++ b/js/js.libraries/src/generated/org.w3c.xhr.kt
@@ -19,7 +19,7 @@ import org.w3c.notifications.*
 import org.w3c.performance.*
 import org.w3c.workers.*
 
-native public trait XMLHttpRequestEventTarget : EventTarget {
+native public interface XMLHttpRequestEventTarget : EventTarget {
     var onloadstart: ((Event) -> dynamic)?
         get() = noImpl
         set(value) = noImpl
@@ -43,7 +43,7 @@ native public trait XMLHttpRequestEventTarget : EventTarget {
         set(value) = noImpl
 }
 
-native public trait XMLHttpRequestUpload : XMLHttpRequestEventTarget {
+native public interface XMLHttpRequestUpload : XMLHttpRequestEventTarget {
 }
 
 native public open class XMLHttpRequest : XMLHttpRequestEventTarget {
diff --git a/libraries/tools/idl2k/src/main/kotlin/render.kt b/libraries/tools/idl2k/src/main/kotlin/render.kt
index a5794e8c719..338bfaa2c6e 100644
--- a/libraries/tools/idl2k/src/main/kotlin/render.kt
+++ b/libraries/tools/idl2k/src/main/kotlin/render.kt
@@ -87,7 +87,7 @@ fun Appendable.render(allTypes: Map<String, GenerateTraitOrClass>, typeNamesToUn
     }
     when (iface.kind) {
         GenerateDefinitionKind.CLASS -> append("open class ")
-        GenerateDefinitionKind.TRAIT -> append("trait ")
+        GenerateDefinitionKind.TRAIT -> append("interface ")
     }
 
     append(iface.name)