Remove offset dependency from css. Move curCSS and getStyles to their own modules. -39 bytes. Close gh-1360.

src/css/curCSS.js

@@ -0,0 +1,52 @@
+define([
+	"../core",
+	"./var/rnumnonpx",
+	"./var/rmargin",
+	"./var/getStyles",
+	"../css", // Circular, but needs jQuery.style
+	"../selector" // contains
+], function( jQuery, rnumnonpx, rmargin, getStyles ) {
+
+function curCSS( elem, name, computed ) {
+	var width, minWidth, maxWidth, ret,
+		style = elem.style;
+
+	computed = computed || getStyles( elem );
+
+	// Support: IE9
+	// getPropertyValue is only needed for .css('filter') in IE9, see #12537
+	ret = computed ? computed.getPropertyValue( name ) || computed[ name ] : undefined;
+
+	if ( computed ) {
+
+		if ( ret === "" && !jQuery.contains( elem.ownerDocument, elem ) ) {
+			ret = jQuery.style( elem, name );
+		}
+
+		// Support: iOS < 6
+		// A tribute to the "awesome hack by Dean Edwards"
+		// iOS < 6 (at least) returns percentage for a larger set of values, but width seems to be reliably pixels
+		// this is against the CSSOM draft spec: http://dev.w3.org/csswg/cssom/#resolved-values
+		if ( rnumnonpx.test( ret ) && rmargin.test( name ) ) {
+
+			// Remember the original values
+			width = style.width;
+			minWidth = style.minWidth;
+			maxWidth = style.maxWidth;
+
+			// Put in the new values to get a computed value out
+			style.minWidth = style.maxWidth = style.width = ret;
+			ret = computed.width;
+
+			// Revert the changed values
+			style.width = width;
+			style.minWidth = minWidth;
+			style.maxWidth = maxWidth;
+		}
+	}
+
+	return ret;
+}
+
+return curCSS;
+});

src/css/var/getStyles.js

@@ -0,0 +1,5 @@
+define(function() {
+	return function( elem ) {
+		return elem.ownerDocument.defaultView.getComputedStyle( elem, null );
+	};
+});

src/css/var/rmargin.js

@@ -0,0 +1,3 @@
+define(function() {
+	return (/^margin/);
+});

src/css/var/rnumnonpx.js

@@ -0,0 +1,5 @@
+define([
+	"../../var/pnum"
+], function( pnum ) {
+	return new RegExp( "^(" + pnum + ")(?!px)[a-z%]+$", "i" );
+});