- Added a hook to swap display none for width and height in browsers that do not sufficiently support get/setAttribute

src/attributes.js

@@ -446,6 +446,20 @@ if ( !jQuery.support.getSetAttribute ) {
 			return value;
 		}
 	};
+
+	// Retrieving the width/height attributes on an
+	// element with display: none returns 0 in ie6/7 (#5413)
+	jQuery.each([ "width", "height" ], function( i, name ) {
+		jQuery.attrHooks[ name ] = jQuery.extend( jQuery.attrHooks[ name ], {
+			get: function( elem ) {
+				var ret;
+				jQuery.swap( elem, { visibility: "hidden", display: "block" }, function() {
+					ret = elem.getAttribute( name );
+				});
+				return ret;
+			}
+		});
+	});
 }
 
 // Remove certain attrs if set to false

src/manipulation.js

@@ -549,7 +549,8 @@ jQuery.extend({
 
 		// Return the cloned set
 		return clone;
-},
+	},
+
 	clean: function( elems, context, fragment, scripts ) {
 		context = context || document;