diff --git a/jso/apis/src/main/java/org/teavm/jso/ajax/ProgressEvent.java b/jso/apis/src/main/java/org/teavm/jso/ajax/ProgressEvent.java
new file mode 100644
index 000000000..db550953c
--- /dev/null
+++ b/jso/apis/src/main/java/org/teavm/jso/ajax/ProgressEvent.java
@@ -0,0 +1,30 @@
+/*
+ *  Copyright 2023 ihromant.
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *       http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+package org.teavm.jso.ajax;
+
+import org.teavm.jso.JSProperty;
+import org.teavm.jso.dom.events.Event;
+
+public interface ProgressEvent extends Event {
+    @JSProperty
+    boolean isLengthComputable();
+
+    @JSProperty
+    int getLoaded();
+
+    @JSProperty
+    int getTotal();
+}
diff --git a/jso/apis/src/main/java/org/teavm/jso/ajax/XMLHttpRequest.java b/jso/apis/src/main/java/org/teavm/jso/ajax/XMLHttpRequest.java
index 3edc20e97..bcecfa1b9 100644
--- a/jso/apis/src/main/java/org/teavm/jso/ajax/XMLHttpRequest.java
+++ b/jso/apis/src/main/java/org/teavm/jso/ajax/XMLHttpRequest.java
@@ -18,9 +18,12 @@ package org.teavm.jso.ajax;
 import org.teavm.jso.JSBody;
 import org.teavm.jso.JSObject;
 import org.teavm.jso.JSProperty;
+import org.teavm.jso.dom.events.Event;
+import org.teavm.jso.dom.events.EventListener;
+import org.teavm.jso.dom.events.EventTarget;
 import org.teavm.jso.dom.xml.Document;
 
-public abstract class XMLHttpRequest implements JSObject {
+public abstract class XMLHttpRequest implements JSObject, EventTarget {
     public static final int UNSET = 0;
 
     public static final int OPENED = 1;
@@ -54,6 +57,30 @@ public abstract class XMLHttpRequest implements JSObject {
     @JSProperty("onreadystatechange")
     public abstract void setOnReadyStateChange(ReadyStateChangeHandler handler);
 
+    @JSProperty("onreadystatechange")
+    public abstract void setOnReadyStateChange(EventListener<Event> handler);
+
+    @JSProperty("onabort")
+    public abstract void onAbort(EventListener<ProgressEvent> eventListener);
+
+    @JSProperty("onerror")
+    public abstract void onError(EventListener<ProgressEvent> eventListener);
+
+    @JSProperty("onload")
+    public abstract void onLoad(EventListener<ProgressEvent> eventListener);
+
+    @JSProperty("onloadstart")
+    public abstract void onLoadStart(EventListener<ProgressEvent> eventListener);
+
+    @JSProperty("onloadend")
+    public abstract void onLoadEnd(EventListener<ProgressEvent> eventListener);
+
+    @JSProperty("onprogress")
+    public abstract void onProgress(EventListener<ProgressEvent> eventListener);
+
+    @JSProperty("ontimeout")
+    public abstract void onTimeout(EventListener<ProgressEvent> eventListener);
+
     public final void onComplete(Runnable runnable) {
         setOnReadyStateChange(() -> {
             if (getReadyState() == DONE) {
diff --git a/jso/apis/src/main/java/org/teavm/jso/websocket/WebSocket.java b/jso/apis/src/main/java/org/teavm/jso/websocket/WebSocket.java
index 48079f199..b58b6c632 100644
--- a/jso/apis/src/main/java/org/teavm/jso/websocket/WebSocket.java
+++ b/jso/apis/src/main/java/org/teavm/jso/websocket/WebSocket.java
@@ -35,7 +35,7 @@ public abstract class WebSocket implements JSObject {
   public abstract void onMessage(EventListener<MessageEvent> eventListener);
 
   @JSProperty("onopen")
-  public abstract void onOpen(EventListener<MessageEvent> eventListener);
+  public abstract void onOpen(EventListener<Event> eventListener);
 
   @JSBody(params = "url", script = "return new WebSocket(url);")
   public static native WebSocket create(String url);