Make sure that height/width getters work on hidden inputs and disconnected elements. Fixes #7225.

src/css.js

@@ -169,6 +169,10 @@ jQuery.each(["height", "width"], function( i, name ) {
 					});
 				}
 
+				if ( val < 0 || val === 0 && !jQuery.contains( elem.ownerDocument.documentElement, elem ) ) {
+					return elem.style[ name ] || "0px";
+				}
+
 				return val + "px";
 			}
 		},

test/unit/css.js

 module("css");
 
 test("css(String|Hash)", function() {
-	expect(34);
+	expect(42);
 
 	equals( jQuery('#main').css("display"), 'block', 'Check for css property "display"');
 
@@ -11,6 +11,24 @@ test("css(String|Hash)", function() {
 	jQuery('#nothiddendiv').css({display: 'block'});
 	ok( jQuery('#nothiddendiv').is(':visible'), 'Modified CSS display: Assert element is visible');
 
+	var div = jQuery( "<div>" );
+
+	equals( div.css("width"), "0px", "Width on disconnected node." );
+	equals( div.css("height"), "0px", "Height on disconnected node." );
+
+	div.css({ width: 4, height: 4 });
+
+	equals( div.css("width"), "4px", "Width on disconnected node." );
+	equals( div.css("height"), "4px", "Height on disconnected node." );
+
+	var div2 = jQuery( "<div style='display:none;'><input type='text'/><textarea/></div>").appendTo("body");
+
+	equals( div2.find("input").css("width"), "0px", "Width on hidden input." );
+	equals( div2.find("input").css("height"), "0px", "Height on hidden input." );
+
+	equals( div2.find("textarea").css("width"), "0px", "Width on hidden textarea." );
+	equals( div2.find("textarea").css("height"), "0px", "Height on hidden textarea." );
+
 	// handle negative numbers by ignoring #1599, #4216
 	jQuery('#nothiddendiv').css({ 'width': 1, 'height': 1 });