Let mw.util.addCSS also return a CSSStyleSheet in IE8

The IE8 has a 'styleSheet' attribute instead of a 'sheet' attribute

Change-Id: I83fc602a43cae7d2d9be32ea6fef84bc5129dbb9

diff --git a/resources/mediawiki/mediawiki.util.js b/resources/mediawiki/mediawiki.util.js
index 259f1c8..cfc717f 100644 (file)
--- a/resources/mediawiki/mediawiki.util.js
+++ b/resources/mediawiki/mediawiki.util.js
@@ -215,7 +215,7 @@
                 */
                addCSS: function ( text ) {
                        var s = mw.loader.addStyleTag( text );
-                       return s.sheet || s;
+                       return s.sheet || s.styleSheet || s;
                },
 
                /**