diff --git a/checkstyle_suppressions.xml b/checkstyle_suppressions.xml
index b84cdfc765..201500e9cd 100644
--- a/checkstyle_suppressions.xml
+++ b/checkstyle_suppressions.xml
@@ -15,6 +15,7 @@
     <suppress checks="JavadocPackage" files=".*Test.java|StandardsMode.java|StandardsMode.java|ElementTestSource.java|BrowserStatement.java|Patch.java|BrowserVersionClassRunnerWithParameters.java|ToRunWithRealBrowsers.java|PatchedHtmlUnitKeyboard.java|CanvasRenderingContext2D2Test2.java"/>
     <suppress checks="JavadocMethod" files="HtmlDomTreeWalker.java" />
 
+    <suppress checks="LineLength" files="ArchitectureTest.java"/>
     <suppress checks="LineLength" files="BrowserVersion.java"/>
     <suppress checks="LineLength" files="JavaScriptEngine.java"/>
     <suppress checks="LineLength" files="EncodingSniffer.java"/>
diff --git a/src/main/java/org/htmlunit/javascript/host/MessagePort.java b/src/main/java/org/htmlunit/javascript/host/MessagePort.java
index 6f8adc0562..feca9f7139 100644
--- a/src/main/java/org/htmlunit/javascript/host/MessagePort.java
+++ b/src/main/java/org/htmlunit/javascript/host/MessagePort.java
@@ -18,6 +18,7 @@
 
 import org.htmlunit.Page;
 import org.htmlunit.WebWindow;
+import org.htmlunit.corejs.javascript.Function;
 import org.htmlunit.javascript.AbstractJavaScriptEngine;
 import org.htmlunit.javascript.HtmlUnitContextFactory;
 import org.htmlunit.javascript.PostponedAction;
@@ -71,7 +72,7 @@ public MessagePort(final MessagePort port) {
      * @return the value of the window's {@code onmessage} property
      */
     @JsxGetter
-    public Object getOnmessage() {
+    public Function getOnmessage() {
         return getHandlerForJavaScript(Event.TYPE_MESSAGE);
     }
 
@@ -84,7 +85,7 @@ public void setOnmessage(final Object onmessage) {
         setHandlerForJavaScript(Event.TYPE_MESSAGE, onmessage);
     }
 
-    private Object getHandlerForJavaScript(final String eventName) {
+    private Function getHandlerForJavaScript(final String eventName) {
         return getEventListenersContainer().getEventHandler(eventName);
     }
 
diff --git a/src/main/java/org/htmlunit/javascript/host/Window.java b/src/main/java/org/htmlunit/javascript/host/Window.java
index 2636fb34a4..5e3b61e085 100644
--- a/src/main/java/org/htmlunit/javascript/host/Window.java
+++ b/src/main/java/org/htmlunit/javascript/host/Window.java
@@ -1233,7 +1233,7 @@ public void scrollTo(final Scriptable x, final Scriptable y) {
      * @return the {@code onload} property
      */
     @JsxGetter
-    public Object getOnload() {
+    public Function getOnload() {
         return getEventHandler(Event.TYPE_LOAD);
     }
 
@@ -1260,7 +1260,7 @@ public void setOnblur(final Object onblur) {
      * @return the {@code onblur} property
      */
     @JsxGetter
-    public Object getOnblur() {
+    public Function getOnblur() {
         return getEventHandler(Event.TYPE_BLUR);
     }
 
@@ -1269,7 +1269,7 @@ public Object getOnblur() {
      * @return the {@code onclick} property
      */
     @JsxGetter
-    public Object getOnclick() {
+    public Function getOnclick() {
         return getEventHandler(MouseEvent.TYPE_CLICK);
     }
 
@@ -1287,7 +1287,7 @@ public void setOnclick(final Object onclick) {
      * @return the {@code ondblclick} property
      */
     @JsxGetter
-    public Object getOndblclick() {
+    public Function getOndblclick() {
         return getEventHandler(MouseEvent.TYPE_DBL_CLICK);
     }
 
@@ -1305,7 +1305,7 @@ public void setOndblclick(final Object ondblclick) {
      * @return the {@code onhashchange} property
      */
     @JsxGetter
-    public Object getOnhashchange() {
+    public Function getOnhashchange() {
         return getEventHandler(Event.TYPE_HASH_CHANGE);
     }
 
@@ -1341,7 +1341,7 @@ public void setName(final String name) {
      * @return the value of the window's {@code onbeforeunload} property
      */
     @JsxGetter
-    public Object getOnbeforeunload() {
+    public Function getOnbeforeunload() {
         return getEventHandler(Event.TYPE_BEFORE_UNLOAD);
     }
 
@@ -1359,7 +1359,7 @@ public void setOnbeforeunload(final Object onbeforeunload) {
      * @return the value of the window's {@code onerror} property
      */
     @JsxGetter
-    public Object getOnerror() {
+    public Function getOnerror() {
         return getEventHandler(Event.TYPE_ERROR);
     }
 
@@ -1377,7 +1377,7 @@ public void setOnerror(final Object onerror) {
      * @return the value of the window's {@code onmessage} property
      */
     @JsxGetter
-    public Object getOnmessage() {
+    public Function getOnmessage() {
         return getEventHandler(Event.TYPE_MESSAGE);
     }
 
@@ -1907,7 +1907,7 @@ public boolean dispatchEvent(final Event event) {
      * @return the handler
      */
     @JsxGetter
-    public Object getOnchange() {
+    public Function getOnchange() {
         return getEventHandler(Event.TYPE_CHANGE);
     }
 
@@ -1925,7 +1925,7 @@ public void setOnchange(final Object onchange) {
      * @return the handler
      */
     @JsxGetter
-    public Object getOnsubmit() {
+    public Function getOnsubmit() {
         return getEventHandler(Event.TYPE_SUBMIT);
     }
 
diff --git a/src/main/java/org/htmlunit/javascript/host/dom/Document.java b/src/main/java/org/htmlunit/javascript/host/dom/Document.java
index 38d99c9f3f..28661e4149 100644
--- a/src/main/java/org/htmlunit/javascript/host/dom/Document.java
+++ b/src/main/java/org/htmlunit/javascript/host/dom/Document.java
@@ -1344,7 +1344,7 @@ public void setOnclick(final Object handler) {
      * @return the {@code onclick} event handler for this element
      */
     @JsxGetter
-    public Object getOnclick() {
+    public Function getOnclick() {
         return getEventHandler(MouseEvent.TYPE_CLICK);
     }
 
@@ -1362,7 +1362,7 @@ public void setOndblclick(final Object handler) {
      * @return the {@code ondblclick} event handler for this element
      */
     @JsxGetter
-    public Object getOndblclick() {
+    public Function getOndblclick() {
         return getEventHandler(MouseEvent.TYPE_DBL_CLICK);
     }
 
@@ -1380,7 +1380,7 @@ public void setOnblur(final Object handler) {
      * @return the {@code onblur} event handler for this element
      */
     @JsxGetter
-    public Object getOnblur() {
+    public Function getOnblur() {
         return getEventHandler(Event.TYPE_BLUR);
     }
 
@@ -1398,7 +1398,7 @@ public void setOnfocus(final Object handler) {
      * @return the {@code onfocus} event handler for this element
      */
     @JsxGetter
-    public Object getOnfocus() {
+    public Function getOnfocus() {
         return getEventHandler(Event.TYPE_FOCUS);
     }
 
@@ -1416,7 +1416,7 @@ public void setOnkeydown(final Object handler) {
      * @return the {@code onkeydown} event handler for this element
      */
     @JsxGetter
-    public Object getOnkeydown() {
+    public Function getOnkeydown() {
         return getEventHandler(Event.TYPE_KEY_DOWN);
     }
 
@@ -1434,7 +1434,7 @@ public void setOnkeypress(final Object handler) {
      * @return the {@code onkeypress} event handler for this element
      */
     @JsxGetter
-    public Object getOnkeypress() {
+    public Function getOnkeypress() {
         return getEventHandler(Event.TYPE_KEY_PRESS);
     }
 
@@ -1452,7 +1452,7 @@ public void setOnkeyup(final Object handler) {
      * @return the {@code onkeyup} event handler for this element
      */
     @JsxGetter
-    public Object getOnkeyup() {
+    public Function getOnkeyup() {
         return getEventHandler(Event.TYPE_KEY_UP);
     }
 
@@ -1470,7 +1470,7 @@ public void setOnmousedown(final Object handler) {
      * @return the {@code onmousedown} event handler for this element
      */
     @JsxGetter
-    public Object getOnmousedown() {
+    public Function getOnmousedown() {
         return getEventHandler(MouseEvent.TYPE_MOUSE_DOWN);
     }
 
@@ -1488,7 +1488,7 @@ public void setOnmousemove(final Object handler) {
      * @return the {@code onmousemove} event handler for this element
      */
     @JsxGetter
-    public Object getOnmousemove() {
+    public Function getOnmousemove() {
         return getEventHandler(MouseEvent.TYPE_MOUSE_MOVE);
     }
 
@@ -1506,7 +1506,7 @@ public void setOnmouseout(final Object handler) {
      * @return the {@code onmouseout} event handler for this element
      */
     @JsxGetter
-    public Object getOnmouseout() {
+    public Function getOnmouseout() {
         return getEventHandler(MouseEvent.TYPE_MOUSE_OUT);
     }
 
@@ -1524,7 +1524,7 @@ public void setOnmouseover(final Object handler) {
      * @return the {@code onmouseover} event handler for this element
      */
     @JsxGetter
-    public Object getOnmouseover() {
+    public Function getOnmouseover() {
         return getEventHandler(MouseEvent.TYPE_MOUSE_OVER);
     }
 
@@ -1542,7 +1542,7 @@ public void setOnmouseup(final Object handler) {
      * @return the {@code onmouseup} event handler for this element
      */
     @JsxGetter
-    public Object getOnmouseup() {
+    public Function getOnmouseup() {
         return getEventHandler(MouseEvent.TYPE_MOUSE_UP);
     }
 
@@ -1560,7 +1560,7 @@ public void setOncontextmenu(final Object handler) {
      * @return the {@code oncontextmenu} event handler for this element
      */
     @JsxGetter
-    public Object getOncontextmenu() {
+    public Function getOncontextmenu() {
         return getEventHandler(MouseEvent.TYPE_CONTEXT_MENU);
     }
 
@@ -1578,7 +1578,7 @@ public void setOnresize(final Object handler) {
      * @return the {@code onresize} event handler for this element
      */
     @JsxGetter
-    public Object getOnresize() {
+    public Function getOnresize() {
         return getEventHandler(Event.TYPE_RESIZE);
     }
 
@@ -1596,7 +1596,7 @@ public void setOnerror(final Object handler) {
      * @return the {@code onerror} event handler for this element
      */
     @JsxGetter
-    public Object getOnerror() {
+    public Function getOnerror() {
         return getEventHandler(Event.TYPE_ERROR);
     }
 
diff --git a/src/main/java/org/htmlunit/javascript/host/html/HTMLBodyElement.java b/src/main/java/org/htmlunit/javascript/host/html/HTMLBodyElement.java
index 26d508dc79..4a54c1b128 100644
--- a/src/main/java/org/htmlunit/javascript/host/html/HTMLBodyElement.java
+++ b/src/main/java/org/htmlunit/javascript/host/html/HTMLBodyElement.java
@@ -213,7 +213,7 @@ public int getClientWidth() {
      */
     @Override
     @JsxGetter({CHROME, EDGE})
-    public Object getOnload() {
+    public Function getOnload() {
         return super.getOnload();
     }
 
@@ -240,7 +240,7 @@ public void setOnblur(final Object handler) {
      */
     @Override
     @JsxGetter({CHROME, EDGE})
-    public Object getOnblur() {
+    public Function getOnblur() {
         return super.getOnblur();
     }
 
@@ -258,7 +258,7 @@ public void setOnfocus(final Object handler) {
      */
     @Override
     @JsxGetter({CHROME, EDGE})
-    public Object getOnfocus() {
+    public Function getOnfocus() {
         return super.getOnfocus();
     }
 
@@ -276,7 +276,7 @@ public void setOnerror(final Object handler) {
      */
     @Override
     @JsxGetter({CHROME, EDGE})
-    public Object getOnerror() {
+    public Function getOnerror() {
         return super.getOnerror();
     }
 
diff --git a/src/main/java/org/htmlunit/javascript/host/html/HTMLElement.java b/src/main/java/org/htmlunit/javascript/host/html/HTMLElement.java
index 9c4587da1a..ec00dccdcc 100644
--- a/src/main/java/org/htmlunit/javascript/host/html/HTMLElement.java
+++ b/src/main/java/org/htmlunit/javascript/host/html/HTMLElement.java
@@ -1200,7 +1200,7 @@ public Function getOnchange() {
      * @return the {@code onsubmit} event handler for this element
      */
     @JsxGetter
-    public Object getOnsubmit() {
+    public Function getOnsubmit() {
         return getEventHandler(Event.TYPE_SUBMIT);
     }
 
@@ -1313,7 +1313,7 @@ public void setOnclick(final Object handler) {
      * @return the {@code onclick} event handler for this element
      */
     @JsxGetter
-    public Object getOnclick() {
+    public Function getOnclick() {
         return getEventHandler(MouseEvent.TYPE_CLICK);
     }
 
@@ -1331,7 +1331,7 @@ public void setOndblclick(final Object handler) {
      * @return the {@code ondblclick} event handler for this element
      */
     @JsxGetter
-    public Object getOndblclick() {
+    public Function getOndblclick() {
         return getEventHandler(MouseEvent.TYPE_DBL_CLICK);
     }
 
@@ -1349,7 +1349,7 @@ public void setOnblur(final Object handler) {
      * @return the {@code onblur} event handler for this element
      */
     @JsxGetter
-    public Object getOnblur() {
+    public Function getOnblur() {
         return getEventHandler(Event.TYPE_BLUR);
     }
 
@@ -1367,7 +1367,7 @@ public void setOnfocus(final Object handler) {
      * @return the {@code onfocus} event handler for this element
      */
     @JsxGetter
-    public Object getOnfocus() {
+    public Function getOnfocus() {
         return getEventHandler(Event.TYPE_FOCUS);
     }
 
@@ -1385,7 +1385,7 @@ public void setOnkeydown(final Object handler) {
      * @return the {@code onkeydown} event handler for this element
      */
     @JsxGetter
-    public Object getOnkeydown() {
+    public Function getOnkeydown() {
         return getEventHandler(Event.TYPE_KEY_DOWN);
     }
 
@@ -1403,7 +1403,7 @@ public void setOnkeypress(final Object handler) {
      * @return the {@code onkeypress} event handler for this element
      */
     @JsxGetter
-    public Object getOnkeypress() {
+    public Function getOnkeypress() {
         return getEventHandler(Event.TYPE_KEY_PRESS);
     }
 
@@ -1421,7 +1421,7 @@ public void setOnkeyup(final Object handler) {
      * @return the {@code onkeyup} event handler for this element
      */
     @JsxGetter
-    public Object getOnkeyup() {
+    public Function getOnkeyup() {
         return getEventHandler(Event.TYPE_KEY_UP);
     }
 
@@ -1439,7 +1439,7 @@ public void setOnmousedown(final Object handler) {
      * @return the {@code onmousedown} event handler for this element
      */
     @JsxGetter
-    public Object getOnmousedown() {
+    public Function getOnmousedown() {
         return getEventHandler(MouseEvent.TYPE_MOUSE_DOWN);
     }
 
@@ -1457,7 +1457,7 @@ public void setOnmousemove(final Object handler) {
      * @return the {@code onmousemove} event handler for this element
      */
     @JsxGetter
-    public Object getOnmousemove() {
+    public Function getOnmousemove() {
         return getEventHandler(MouseEvent.TYPE_MOUSE_MOVE);
     }
 
@@ -1475,7 +1475,7 @@ public void setOnmouseout(final Object handler) {
      * @return the {@code onmouseout} event handler for this element
      */
     @JsxGetter
-    public Object getOnmouseout() {
+    public Function getOnmouseout() {
         return getEventHandler(MouseEvent.TYPE_MOUSE_OUT);
     }
 
@@ -1493,7 +1493,7 @@ public void setOnmouseover(final Object handler) {
      * @return the {@code onmouseover} event handler for this element
      */
     @JsxGetter
-    public Object getOnmouseover() {
+    public Function getOnmouseover() {
         return getEventHandler(MouseEvent.TYPE_MOUSE_OVER);
     }
 
@@ -1511,7 +1511,7 @@ public void setOnmouseup(final Object handler) {
      * @return the {@code onmouseup} event handler for this element
      */
     @JsxGetter
-    public Object getOnmouseup() {
+    public Function getOnmouseup() {
         return getEventHandler(MouseEvent.TYPE_MOUSE_UP);
     }
 
@@ -1529,7 +1529,7 @@ public void setOncontextmenu(final Object handler) {
      * @return the {@code oncontextmenu} event handler for this element
      */
     @JsxGetter
-    public Object getOncontextmenu() {
+    public Function getOncontextmenu() {
         return getEventHandler(MouseEvent.TYPE_CONTEXT_MENU);
     }
 
@@ -1565,7 +1565,7 @@ public void setOnerror(final Object handler) {
      * @return the {@code onerror} event handler for this element
      */
     @JsxGetter
-    public Object getOnerror() {
+    public Function getOnerror() {
         return getEventHandler(Event.TYPE_ERROR);
     }
 
@@ -1956,7 +1956,7 @@ public void setOninvalid(final Object oninvalid) {
      * @return the {@code onload} event handler for this element
      */
     @JsxGetter
-    public Object getOnload() {
+    public Function getOnload() {
         if (this instanceof HTMLBodyElement) {
             return getWindow().getEventHandler(Event.TYPE_LOAD);
         }
diff --git a/src/main/java/org/htmlunit/javascript/host/worker/Worker.java b/src/main/java/org/htmlunit/javascript/host/worker/Worker.java
index 78f56bd2f4..eedf4e15f1 100644
--- a/src/main/java/org/htmlunit/javascript/host/worker/Worker.java
+++ b/src/main/java/org/htmlunit/javascript/host/worker/Worker.java
@@ -123,7 +123,7 @@ public void setOnmessage(final Object onmessage) {
      * @return the handler
      */
     @JsxGetter
-    public Object getOnmessage() {
+    public Function getOnmessage() {
         return getEventListenersContainer().getEventHandler(Event.TYPE_MESSAGE);
     }
 }
diff --git a/src/test/java/org/htmlunit/archunit/ArchitectureTest.java b/src/test/java/org/htmlunit/archunit/ArchitectureTest.java
index b13ef7fea9..d03538e3c8 100644
--- a/src/test/java/org/htmlunit/archunit/ArchitectureTest.java
+++ b/src/test/java/org/htmlunit/archunit/ArchitectureTest.java
@@ -24,6 +24,7 @@
 import java.util.function.Supplier;
 
 import org.apache.commons.lang3.StringUtils;
+import org.htmlunit.corejs.javascript.Scriptable;
 import org.htmlunit.javascript.configuration.JsxClass;
 import org.htmlunit.javascript.configuration.JsxClasses;
 import org.htmlunit.javascript.configuration.JsxConstant;
@@ -34,6 +35,7 @@
 import org.junit.runner.RunWith;
 
 import com.tngtech.archunit.base.DescribedPredicate;
+import com.tngtech.archunit.core.domain.JavaClass;
 import com.tngtech.archunit.core.domain.JavaMethod;
 import com.tngtech.archunit.core.domain.JavaModifier;
 import com.tngtech.archunit.core.importer.ImportOption;
@@ -119,6 +121,16 @@ public class ArchitectureTest {
             .andShould().haveModifier(JavaModifier.STATIC)
             .andShould().haveModifier(JavaModifier.FINAL);
 
+    /**
+     * Every JsxConstant should be a string, int, or long.
+     */
+    @ArchTest
+    public static final ArchRule jsxConstantType = fields()
+            .that().areAnnotatedWith(JsxConstant.class)
+            .should().haveRawType(String.class)
+            .orShould().haveRawType("int")
+            .orShould().haveRawType("long");
+
     /**
      * JsxGetter/Setter/Functions are always in the javascript package.
      */
@@ -144,25 +156,230 @@ public class ArchitectureTest {
             .should().beDeclaredInClassesThat().areAnnotatedWith(JsxClass.class)
             .orShould().beDeclaredInClassesThat().areAnnotatedWith(JsxClasses.class);
 
-    /**
-     * JsxConstants should not defined as short.
-     */
-    @ArchTest
-    public static final ArchRule jsxConstantReturnType = fields()
-            .that().areAnnotatedWith(JsxConstant.class)
-            .should().notHaveRawType("short")
-            .andShould().notHaveRawType("float");
+    private static final DescribedPredicate<? super JavaClass> isAssignableToScriptable =
+            new DescribedPredicate<JavaClass>("@is not assignable to Scriptable") {
+                @Override
+                public boolean test(final JavaClass javaClass) {
+                    return javaClass.isAssignableTo(Scriptable.class);
+                }
+            };
 
     /**
-     * JsxGetter/Setter/Functions should not return a short.
+     * JsxGetter should only return Scriptable's.
      */
     @ArchTest
-    public static final ArchRule jsxAnnotationReturnType = methods()
-            .that().areAnnotatedWith(JsxGetter.class)
-                    .or().areAnnotatedWith(JsxSetter.class)
-                    .or().areAnnotatedWith(JsxFunction.class)
-            .should().notHaveRawReturnType("short")
-            .andShould().notHaveRawReturnType("float");
+    public static final ArchRule jsxGetterReturnType = methods()
+            .that()
+                .areAnnotatedWith(JsxGetter.class)
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.History.getState()")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.MimeType.getEnabledPlugin()")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.Navigator.getDoNotTrack()")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.Navigator.getMimeTypes()")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.Navigator.getPlugins()")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.URL.getOrigin()")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.Window.getClientInformation()")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.Window.getControllers()")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.Window.getEvent()")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.Window.getFrames_js()")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.Window.getIsSecureContext()")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.Window.getLength()")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.Window.getOffscreenBuffering()")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.Window.getOpener()")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.Window.getParent()")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.Window.getSelf()")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.Window.getTop()")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.canvas.CanvasRenderingContext2D.getFillStyle()")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.canvas.CanvasRenderingContext2D.getGlobalAlpha()")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.canvas.CanvasRenderingContext2D.getLineWidth()")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.canvas.CanvasRenderingContext2D.getStrokeStyle()")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.css.CSSStyleDeclaration.getZIndex()")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.dom.AbstractRange.getEndContainer()")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.dom.AbstractRange.getStartContainer()")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.dom.CharacterData.getData()")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.dom.DOMException.getCode()")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.dom.DOMException.getFilename()")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.dom.DOMException.getLineNumber()")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.dom.DOMException.getMessage()")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.dom.Document.getActiveElement()")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.dom.Document.getAnchors()")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.dom.Document.getApplets()")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.dom.Document.getDefaultView()")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.dom.Document.getEmbeds()")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.dom.Document.getForms()")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.dom.Document.getHead()")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.dom.Document.getImages()")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.dom.Document.getLinks()")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.dom.Document.getPlugins()")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.dom.Document.getScripts()")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.dom.Node.getParentNode()")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.dom.NodeIterator.getFilter()")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.dom.Range.getCommonAncestorContainer()")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.dom.TreeWalker.getFilter()")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.dom.XPathResult.getNumberValue()")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.draganddrop.DataTransferItem.getKind()")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.draganddrop.DataTransferItem.getType()")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.event.BeforeUnloadEvent.getReturnValue()")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.event.CustomEvent.getDetail()")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.event.Event.getComposed()")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.event.Event.getReturnValue()")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.event.Event.getSrcElement()")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.event.Event.getTarget()")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.event.HashChangeEvent.getNewURL()")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.event.HashChangeEvent.getOldURL()")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.event.InputEvent.getData()")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.event.InputEvent.getInputType()")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.event.MessageEvent.getData()")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.event.MessageEvent.getPorts()")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.event.PointerEvent.getAltitudeAngle()")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.event.PointerEvent.getAzimuthAngle()")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.event.PointerEvent.getPressure()")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.event.PopStateEvent.getState()")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.event.ProgressEvent.getLoaded()")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.event.TextEvent.getData()")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.event.UIEvent.getView()")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.file.FileReader.getResult()")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.geo.GeolocationCoordinates.getAccuracy()")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.geo.GeolocationCoordinates.getLatitude()")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.geo.GeolocationCoordinates.getLongitude()")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.html.HTMLButtonElement.getValue()")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.html.HTMLDataListElement.getOptions()")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.html.HTMLElement.getOffsetParent_js()")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.html.HTMLInputElement.getFiles()")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.html.HTMLInputElement.getSelectionEnd()")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.html.HTMLInputElement.getSelectionStart()")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.html.HTMLMeterElement.getHigh()")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.html.HTMLMeterElement.getLow()")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.html.HTMLMeterElement.getMax()")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.html.HTMLMeterElement.getMin()")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.html.HTMLMeterElement.getOptimum()")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.html.HTMLMeterElement.getValue()")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.html.HTMLPreElement.getWidth_js()")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.html.HTMLProgressElement.getMax()")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.html.HTMLProgressElement.getValue()")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.html.HTMLTableElement.getCaption()")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.html.HTMLTableElement.getTBodies()")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.html.HTMLTableElement.getTFoot()")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.html.HTMLTableElement.getTHead()")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.html.HTMLTableRowElement.getCells()")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.html.HTMLTextAreaElement.getMaxLength()")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.html.HTMLTextAreaElement.getMinLength()")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.html.HTMLTitleElement.getText()")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.html.RowContainer.getRows()")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.media.AudioParam.getDefaultValue()")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.media.AudioParam.getMaxValue()")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.media.AudioParam.getMinValue()")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.media.AudioParam.getValue()")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.network.NetworkInformation.getDownlink()")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.svg.SVGMatrix.getA()")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.svg.SVGMatrix.getB()")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.svg.SVGMatrix.getC()")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.svg.SVGMatrix.getD()")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.svg.SVGMatrix.getE()")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.svg.SVGMatrix.getF()")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.svg.SVGRect.getHeight()")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.svg.SVGRect.getWidth()")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.svg.SVGRect.getX()")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.svg.SVGRect.getY()")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.worker.DedicatedWorkerGlobalScope.getSelf()")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.xml.XMLHttpRequest.getResponse()")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.xml.XMLHttpRequest.getResponseXML()")
+
+            .should().haveRawReturnType(String.class)
+            .orShould().haveRawReturnType("int")
+            .orShould().haveRawReturnType("long")
+            .orShould().haveRawReturnType("boolean")
+            .orShould().haveRawReturnType(isAssignableToScriptable);
+
+    /**
+     * JsxFunctions should only return Scriptable's.
+     */
+    @ArchTest
+    public static final ArchRule jsxFunctionReturnType = methods()
+            .that()
+                .areAnnotatedWith(JsxFunction.class)
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.Element.insertAdjacentElement(java.lang.String, java.lang.Object)")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.External.isSearchProviderInstalled()")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.FontFaceSet.load(java.lang.String, java.lang.String)")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.SimpleArray.item(int)")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.SimpleArray.namedItem(java.lang.String)")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.Storage.getItem(java.lang.String)")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.URLSearchParams.entries()")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.URLSearchParams.keys()")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.URLSearchParams.values()")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.Window.setInterval(org.htmlunit.corejs.javascript.Context, org.htmlunit.corejs.javascript.Scriptable, org.htmlunit.corejs.javascript.Scriptable, [Ljava.lang.Object;, org.htmlunit.corejs.javascript.Function)")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.Window.setTimeout(org.htmlunit.corejs.javascript.Context, org.htmlunit.corejs.javascript.Scriptable, org.htmlunit.corejs.javascript.Scriptable, [Ljava.lang.Object;, org.htmlunit.corejs.javascript.Function)")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.canvas.IntersectionObserver.takeRecords()")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.crypto.SubtleCrypto.decrypt()")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.crypto.SubtleCrypto.deriveBits()")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.crypto.SubtleCrypto.deriveKey()")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.crypto.SubtleCrypto.digest()")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.crypto.SubtleCrypto.encrypt()")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.crypto.SubtleCrypto.exportKey()")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.crypto.SubtleCrypto.generateKey()")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.crypto.SubtleCrypto.importKey()")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.crypto.SubtleCrypto.sign()")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.crypto.SubtleCrypto.unwrapKey()")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.crypto.SubtleCrypto.verify()")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.crypto.SubtleCrypto.wrapKey()")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.css.CSSRuleList.item(int)")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.css.StyleSheetList.item(int)")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.dom.DOMTokenList.item(int)")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.dom.Document.adoptNode(org.htmlunit.javascript.host.dom.Node)")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.dom.Document.createCDATASection(java.lang.String)")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.dom.Document.createComment(java.lang.String)")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.dom.Document.createDocumentFragment()")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.dom.Document.createElement(java.lang.String)")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.dom.Document.createElementNS(java.lang.String, java.lang.String)")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.dom.Document.createProcessingInstruction(java.lang.String, java.lang.String)")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.dom.Document.createTextNode(java.lang.String)")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.dom.Document.createTreeWalker(org.htmlunit.javascript.host.dom.Node, double, org.htmlunit.corejs.javascript.Scriptable, boolean)")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.dom.Document.elementFromPoint(int, int)")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.dom.Document.getElementsByTagNameNS(java.lang.Object, java.lang.String)")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.dom.Node.appendChild(java.lang.Object)")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.dom.Node.cloneNode(boolean)")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.dom.Node.getRootNode()")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.dom.Node.insertBefore(org.htmlunit.corejs.javascript.Context, org.htmlunit.corejs.javascript.Scriptable, org.htmlunit.corejs.javascript.Scriptable, [Ljava.lang.Object;, org.htmlunit.corejs.javascript.Function)")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.dom.Node.removeChild(java.lang.Object)")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.dom.Node.replaceChild(java.lang.Object, java.lang.Object)")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.dom.NodeList.item(java.lang.Object)")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.dom.Range.cloneRange()")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.dom.Range.compareBoundaryPoints(int, org.htmlunit.javascript.host.dom.Range)")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.dom.Text.splitText(int)")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.file.Blob.arrayBuffer()")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.file.Blob.text()")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.html.HTMLCanvasElement.getContext(java.lang.String)")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.html.HTMLCollection.item(java.lang.Object)")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.html.HTMLCollection.namedItem(java.lang.String)")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.html.HTMLDocument.open(java.lang.Object, java.lang.Object, java.lang.Object, java.lang.Object)")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.html.HTMLFormControlsCollection.namedItem(java.lang.String)")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.html.HTMLMediaElement.play()")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.html.HTMLOptionsCollection.item(int)")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.html.HTMLSelectElement.item(int)")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.html.HTMLTableElement.createCaption()")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.html.HTMLTableElement.createTBody()")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.html.HTMLTableElement.createTFoot()")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.html.HTMLTableElement.createTHead()")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.html.HTMLTableRowElement.insertCell(java.lang.Object)")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.html.RowContainer.insertRow(java.lang.Object)")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.intl.V8BreakIterator.resolvedOptions()")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.media.BaseAudioContext.decodeAudioData(org.htmlunit.corejs.javascript.typedarrays.NativeArrayBuffer, org.htmlunit.corejs.javascript.Function, org.htmlunit.corejs.javascript.Function)")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.media.MediaDevices.getUserMedia()")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.performance.Performance.now()")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.performance.PerformanceNavigation.toJSON()")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.svg.SVGPathElement.getTotalLength()")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.svg.SVGTextContentElement.getComputedTextLength()")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.worker.DedicatedWorkerGlobalScope.setInterval(org.htmlunit.corejs.javascript.Context, org.htmlunit.corejs.javascript.Scriptable, org.htmlunit.corejs.javascript.Scriptable, [Ljava.lang.Object;, org.htmlunit.corejs.javascript.Function)")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.worker.DedicatedWorkerGlobalScope.setTimeout(org.htmlunit.corejs.javascript.Context, org.htmlunit.corejs.javascript.Scriptable, org.htmlunit.corejs.javascript.Scriptable, [Ljava.lang.Object;, org.htmlunit.corejs.javascript.Function)")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.xml.FormData.keys()")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.xml.FormData.values()")
+                .and().doNotHaveFullName("org.htmlunit.javascript.host.xml.XSLTProcessor.getParameter(java.lang.String, java.lang.String)")
+
+            .should().haveRawReturnType(String.class)
+            .orShould().haveRawReturnType("int")
+            .orShould().haveRawReturnType("long")
+            .orShould().haveRawReturnType("boolean")
+            .orShould().haveRawReturnType("void")
+            .orShould().haveRawReturnType(isAssignableToScriptable);
 
     /**
      * JsxConstructor should not used for constructors.