Use a key name less likely to result in collisions for events on plain JS objects. Fixes bug #7150.

src/event.js

@@ -54,7 +54,10 @@ jQuery.event = {
 			return;
 		}
 
-		var events = elemData.events,
+		// Use a key less likely to result in collisions for plain JS objects.
+		// Fixes bug #7150.
+		var eventKey = elem.nodeType ? "events" : "__events__",
+			events = elemData[ eventKey ],
 			eventHandle = elemData.handle;
 			
 		if ( typeof events === "function" ) {
@@ -68,7 +71,7 @@ jQuery.event = {
 			if ( !elem.nodeType ) {
 				// On plain objects, create a fn that acts as the holder
 				// of the values to avoid JSON serialization of event data
-				elemData.events = elemData = function(){};
+				elemData[ eventKey ] = elemData = function(){};
 			}
 
 			elemData.events = events = {};
@@ -170,8 +173,9 @@ jQuery.event = {
 		}
 
 		var ret, type, fn, j, i = 0, all, namespaces, namespace, special, eventType, handleObj, origType,
+			eventKey = elem.nodeType ? "events" : "__events__",
 			elemData = jQuery.data( elem ),
-			events = elemData && elemData.events;
+			events = elemData && elemData[ eventKey ];
 
 		if ( !elemData || !events ) {
 			return;
@@ -278,7 +282,7 @@ jQuery.event = {
 				handle.elem = null;
 			}
 
-			delete elemData.events;
+			delete elemData[ eventKey ];
 			delete elemData.handle;
 
 			if ( typeof elemData === "function" ) {
@@ -346,7 +350,7 @@ jQuery.event = {
 		// Trigger the event, it is assumed that "handle" is a function
 		var handle = elem.nodeType ?
 			jQuery.data( elem, "handle" ) :
-			(jQuery.data( elem, "events" ) || {}).handle;
+			(jQuery.data( elem, "__events__" ) || {}).handle;
 
 		if ( handle ) {
 			handle.apply( elem, data );
@@ -420,7 +424,7 @@ jQuery.event = {
 
 		event.namespace = event.namespace || namespace_sort.join(".");
 
-		events = jQuery.data(this, "events");
+		events = jQuery.data(this, this.nodeType ? "events" : "__events__");
 
 		if ( typeof events === "function" ) {
 			events = events.events;
@@ -1044,7 +1048,7 @@ jQuery.each(["live", "die"], function( i, name ) {
 function liveHandler( event ) {
 	var stop, maxLevel, elems = [], selectors = [],
 		related, match, handleObj, elem, j, i, l, data, close, namespace, ret,
-		events = jQuery.data( this, "events" );
+		events = jQuery.data( this, this.nodeType ? "events" : "__events__" );
 
 	if ( typeof events === "function" ) {
 		events = events.events;

test/unit/event.js

@@ -457,7 +457,7 @@ test("bind()/trigger()/unbind() on plain object", function() {
 		ok( true, "Custom event run." );
 	});
 
-	var events = jQuery(obj).data("events");
+	var events = jQuery(obj).data("__events__");
 	ok( events, "Object has events bound." );
 	equals( typeof events, "function", "'events' expando is a function on plain objects." );
 	equals( obj.test, undefined, "Make sure that test event is not on the plain object." );