Added $().data(), $().removeData(), and .bind("click!"). .data() and .removeData() handle namespaced data, .data() triggers a "set-KEY" event on all modified elements, and .bind("click!") only triggers a click (and no namespaced events).

Author: jeresig

src/core.js

@@ -477,6 +477,26 @@ jQuery.fn = jQuery.prototype = {
 	andSelf: function() {
 		return this.add( this.prevObject );
 	},
+
+	data: function( key, value ){
+		if ( value == null ) {
+			if ( this.length ) {
+				var data = jQuery.data( this[0], key );
+				return data == null ?
+					jQuery.data( this[0], key.split(".")[0] ) :
+					data;
+			}
+		} else
+			return this.trigger("set-" + key + "!", [value]).each(function(){
+				jQuery.data( this, key, value );
+			});
+	},
+
+	removeData: function( key ){
+		return this.each(function(){
+			jQuery.removeData( this, key );
+		});
+	},
 
 	domManip: function( args, table, reverse, callback ) {
 		var clone = this.length > 1, elems; 

src/event.js

@@ -169,6 +169,11 @@ jQuery.event = {
 		// Clone the incoming data, if any
 		data = jQuery.makeArray(data || []);
 
+		if ( type.indexOf("!") >= 0 ) {
+			type = type.slice(0, -1);
+			var exclusive = true;
+		}
+
 		// Handle a global trigger
 		if ( !elem ) {
 			// Only trigger if we've ever bound an event for it
@@ -191,6 +196,8 @@ jQuery.event = {
 
 			// Enforce the right trigger type
 			data[0].type = type;
+			if ( exclusive )
+				data[0].exclusive = true;
 
 			// Trigger the event
 			if ( jQuery.isFunction( jQuery.data(elem, "handle") ) )
@@ -250,7 +257,7 @@ jQuery.event = {
 			args[0].data = handler.data;
 
 			// Filter the functions by class
-			if ( !parts[1] || handler.type == parts[1] ) {
+			if ( !parts[1] && !event.exclusive || handler.type == parts[1] ) {
 				var ret = handler.apply( this, args );
 
 				if ( val !== false )

test/unit/core.js

@@ -1397,6 +1397,36 @@ test("$.data", function() {
 	ok( jQuery.data(div, "test") == "overwritten", "Check for overwritten data" );
 });
 
+test(".data()", function() {
+	expect(11);
+	var div = $("#foo");
+	ok( div.data("test") == undefined, "Check for no data exists" );
+	div.data("test", "success");
+	ok( div.data("test") == "success", "Check for added data" );
+	div.data("test", "overwritten");
+	ok( div.data("test") == "overwritten", "Check for overwritten data" );
+
+	var hits = 0;
+
+	div
+		.bind("set-test",function(){ hits += 1; })
+		.bind("set-test.foo",function(){ hits += 2; })
+
+	div.data("test.foo", "foodata");
+	ok( div.data("test") == "overwritten", "Check for original data" );
+	ok( div.data("test.foo") == "foodata", "Check for namespaced data" );
+	ok( div.data("test.bar") == "overwritten", "Check for unmatched namespace" );
+	ok( hits == 2, "Check triggered functions" );
+
+	hits = 0;
+
+	div.data("test", "overwritten2");
+	ok( div.data("test") == "overwritten2", "Check for original data" );
+	ok( div.data("test.foo") == "foodata", "Check for namespaced data" );
+	ok( div.data("test.bar") == "overwritten2", "Check for unmatched namespace" );
+	ok( hits == 1, "Check triggered functions" );
+});
+
 test("$.removeData", function() {
 	expect(1);
 	var div = $("#foo")[0];
@@ -1405,6 +1435,27 @@ test("$.removeData", function() {
 	ok( jQuery.data(div, "test") == undefined, "Check removal of data" );
 });
 
+test(".removeData()", function() {
+	expect(6);
+	var div = $("#foo");
+	div.data("test", "testing");
+	div.removeData("test");
+	ok( div.data("test") == undefined, "Check removal of data" );
+
+	div.data("test", "testing");
+	div.data("test.foo", "testing2");
+	div.removeData("test.bar");
+	ok( div.data("test.foo") == "testing2", "Make sure data is intact" );
+	ok( div.data("test") == "testing", "Make sure data is intact" );
+
+	div.removeData("test");
+	ok( div.data("test.foo") == "testing2", "Make sure data is intact" );
+	ok( div.data("test") == undefined, "Make sure data is intact" );
+
+	div.removeData("test.foo");
+	ok( div.data("test.foo") == undefined, "Make sure data is intact" );
+});
+
 test("remove()", function() {
 	expect(6);
 	$("#ap").children().remove();