X-Git-Url: http://git.asbjorn.biz/?a=blobdiff_plain;f=src%2Fdata.js;h=c3530c835f731a7d34336c53affa4cb39557832d;hb=f5d4bf8920868c2d1f88cc4f3bfcf85c0b566b2e;hp=31cdc121e9284bd19a89347e0df250634e704711;hpb=8a5df39045292397a06d08b4fab2ad29819b5d44;p=jquery.git

diff --git a/src/data.js b/src/data.js
index 31cdc12..c3530c8 100644
--- a/src/data.js
+++ b/src/data.js
@@ -9,7 +9,7 @@ jQuery.extend({
 	// Please use with caution
 	uuid: 0,
 
-	// Unique for each copy of jQuery on the page	
+	// Unique for each copy of jQuery on the page
 	expando: "jQuery" + jQuery.now(),
 
 	// The following elements throw uncatchable exceptions if you
@@ -21,6 +21,10 @@ jQuery.extend({
 		"applet": true
 	},
 
+	hasData: function( elem ) {
+		return !elem.nodeType || (!!elem[ jQuery.expando ] && !jQuery.isEmptyObject(jQuery.cache[ elem[jQuery.expando] ]));
+	},
+
 	data: function( elem, name, data ) {
 		if ( !jQuery.acceptData( elem ) ) {
 			return;
@@ -134,19 +138,21 @@ jQuery.extend({
 
 jQuery.fn.extend({
 	data: function( key, value ) {
-		if ( typeof key === "undefined" ) {
-			var data = null;
+		var data = null;
 
+		if ( typeof key === "undefined" ) {
 			if ( this.length ) {
-				var attr = this[0].attributes, name;
 				data = jQuery.data( this[0] );
 
-				for ( var i = 0, l = attr.length; i < l; i++ ) {
-					name = attr[i].name;
+				if ( this[0].nodeType === 1 ) {
+					var attr = this[0].attributes, name;
+					for ( var i = 0, l = attr.length; i < l; i++ ) {
+						name = attr[i].name;
 
-					if ( name.indexOf( "data-" ) === 0 ) {
-						name = name.substr( 5 );
-						dataAttr( this[0], name, data[ name ] );
+						if ( name.indexOf( "data-" ) === 0 ) {
+							name = name.substr( 5 );
+							dataAttr( this[0], name, data[ name ] );
+						}
 					}
 				}
 			}
@@ -163,7 +169,7 @@ jQuery.fn.extend({
 		parts[1] = parts[1] ? "." + parts[1] : "";
 
 		if ( value === undefined ) {
-			var data = this.triggerHandler("getData" + parts[1] + "!", [parts[0]]);
+			data = this.triggerHandler("getData" + parts[1] + "!", [parts[0]]);
 
 			// Try to fetch any internally stored data first
 			if ( data === undefined && this.length ) {
@@ -177,7 +183,8 @@ jQuery.fn.extend({
 
 		} else {
 			return this.each(function() {
-				var $this = jQuery( this ), args = [ parts[0], value ];
+				var $this = jQuery( this ),
+					args = [ parts[0], value ];
 
 				$this.triggerHandler( "setData" + parts[1] + "!", args );
 				jQuery.data( this, key, value );