diff --git a/extends.js b/extends.js
index 26634e09b5..8a24f1cbd9 100644
--- a/extends.js
+++ b/extends.js
@@ -1,9 +1,9 @@
 /* extends.js
 
 	Purpose:
-		
+
 	Description:
-		
+
 	History:
 		1:02 PM 2023/8/21, Created by jumperchen
 
@@ -18,8 +18,9 @@ var extendStatics = function(d, b) {
 
 // refer tslib#__extends
 export default function (d, b) {
+	const len = Object.keys(d.prototype).length; // Potix: Jumper Chen adds to support `$supers(foo.Bar, 'bind_')`
 	extendStatics(d, b);
 	function __() { this.constructor = d; }
 	d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
-	d.prototype._$super = d.name == '$subclass$' && b.prototype._$super ? b.prototype._$super : b.prototype; // Potix: Jumper Chen adds to support `$supers(foo.Bar, 'bind_')`
+	d.prototype._$super = len === 0 && b.prototype._$super ? b.prototype._$super : b.prototype; // Potix: Jumper Chen adds to support `$supers(foo.Bar, 'bind_')`
 }
\ No newline at end of file
diff --git a/zkdoc/release-note b/zkdoc/release-note
index 7018d0b23d..5c329e4eb1 100644
--- a/zkdoc/release-note
+++ b/zkdoc/release-note
@@ -15,6 +15,7 @@ ZK 10.1.0
   ZK-5703: Debug messages shouldn't be created if debug is disabled, may cause side effects
   ZK-5716: Errorbox contains inline script
   ZK-5787: aria-hidden elements do not contain focusable elements
+  ZK-5743: clicking menuitem fires 2 onClick events in mobile browser
 
 * Upgrade Notes
   + Remove Htmls.encodeJavaScript(), Strings.encodeJavaScript(), Strings.escape() with Strings.ESCAPE_JAVASCRIPT, and replace them with OWASP Java Encoder APIs instead.
diff --git a/zktest/src/main/webapp/test2/B101-ZK-5743-zk.xml b/zktest/src/main/webapp/test2/B101-ZK-5743-zk.xml
new file mode 100644
index 0000000000..0dba55dc88
--- /dev/null
+++ b/zktest/src/main/webapp/test2/B101-ZK-5743-zk.xml
@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<zk>
+	<client-config>
+		<debug-js>false</debug-js>
+	</client-config>
+
+	<library-property>
+		<name>org.zkoss.zkmax.tablet.ui.disabled</name>
+		<value>false</value>
+	</library-property>
+</zk>
\ No newline at end of file
diff --git a/zktest/src/main/webapp/test2/B101-ZK-5743.zul b/zktest/src/main/webapp/test2/B101-ZK-5743.zul
new file mode 100644
index 0000000000..6ef0d0d9cf
--- /dev/null
+++ b/zktest/src/main/webapp/test2/B101-ZK-5743.zul
@@ -0,0 +1,25 @@
+<?xml version="1.0" encoding="UTF-8"?>
+
+<!--
+B101-ZK-5743.zul
+
+	Purpose:
+
+	Description:
+
+	History:
+		2024/9/13, Created by jumperchen
+
+Copyright (C) 2024 Potix Corporation. All Rights Reserved.
+
+-->
+<zk>
+	<div>
+		<label multiline="true">
+			Clicking menuitem fires 2 onClick events in mobile browser (if disabled debug-js in zk.xml)
+		</label>
+		<menubar autodrop="true">
+			<menuitem onClick="Clients.log(event.toString())" iconSclass="z-icon-cog" label="menuitem1"/>
+		</menubar>
+	</div>
+</zk>
\ No newline at end of file
diff --git a/zktest/src/main/webapp/test2/config.properties b/zktest/src/main/webapp/test2/config.properties
index d38e1ccd7d..127d594b3c 100644
--- a/zktest/src/main/webapp/test2/config.properties
+++ b/zktest/src/main/webapp/test2/config.properties
@@ -3134,6 +3134,7 @@ B90-ZK-4431.zul=A,E,Multislider
 ##zats##B101-ZK-5696.zul=A,E,NestedShadow,ServerMVVM,ForEach,Differ
 ##zats##B101-ZK-5716.zul=A,E,CSP,Security,Content-Security-Policy,Unsafe-inline
 ##zats##B101-ZK-5787.zul=A,E,WCAG,Accessibility,Focus,Tabindex,Aria-hidden
+##zats##B101-ZK-5743.zul=A,E,Compressed,JS,Debug-JS,TabletUI,Mobile,onClick
 
 ##
 # Features - 3.0.x version
diff --git a/zktest/src/test/java/org/zkoss/zktest/zats/test2/B101_ZK_5743Test.java b/zktest/src/test/java/org/zkoss/zktest/zats/test2/B101_ZK_5743Test.java
new file mode 100644
index 0000000000..8393f1b511
--- /dev/null
+++ b/zktest/src/test/java/org/zkoss/zktest/zats/test2/B101_ZK_5743Test.java
@@ -0,0 +1,51 @@
+/* B101_ZK_5743Test.java
+
+	Purpose:
+
+	Description:
+
+	History:
+		12:17 PM 2024/9/13, Created by jumperchen
+
+Copyright (C) 2024 Potix Corporation. All Rights Reserved.
+*/
+package org.zkoss.zktest.zats.test2;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+import java.util.Collections;
+
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.RegisterExtension;
+import org.openqa.selenium.chrome.ChromeOptions;
+
+import org.zkoss.test.webdriver.ExternalZkXml;
+import org.zkoss.test.webdriver.ForkJVMTestOnly;
+import org.zkoss.test.webdriver.WebDriverTestCase;
+
+/**
+ * @author jumperchen
+ */
+@ForkJVMTestOnly
+public class B101_ZK_5743Test extends WebDriverTestCase {
+
+	@RegisterExtension
+	public static final ExternalZkXml CONFIG = new ExternalZkXml(
+			B101_ZK_5743Test.class);
+
+	@Override
+	protected ChromeOptions getWebDriverOptions() {
+		return super.getWebDriverOptions()
+				.setExperimentalOption("mobileEmulation", Collections.singletonMap("deviceName", "iPad"));
+	}
+
+	@Test
+	public void test() {
+		connect();
+		click(jq("@menuitem"));
+		waitResponse();
+		String zkLog = getZKLog();
+		long count = zkLog.split("onClick").length - 1;
+		assertEquals(1, count);
+	}
+}