From: Bartosz Dziewoński <matma.rex@gmail.com>
Date: Fri, 2 Oct 2015 15:00:33 +0000 (+0200)
Subject: Don't clobber existing styles when adding more in IE9
X-Git-Tag: 1.31.0-rc.0~9591
X-Git-Url: http://git.cyclocoop.org/%7D%7Cconcat%7B?a=commitdiff_plain;h=b54ef9d1a05d683ca507067b8c23e5fe195b7b19;p=lhc%2Fweb%2Fwiklou.git

Don't clobber existing styles when adding more in IE9

Follow-up to c2e8f505c12ace6af42161bf9930d483b1721f2e. This was really
stupid and I feel stupid.

Bug: T114323
Change-Id: I80292083d8fd50c2e2727446e4468b6a13ad40e5
---

diff --git a/resources/src/mediawiki/mediawiki.js b/resources/src/mediawiki/mediawiki.js
index 2eecbabb4e..12d698b452 100644
--- a/resources/src/mediawiki/mediawiki.js
+++ b/resources/src/mediawiki/mediawiki.js
@@ -863,7 +863,7 @@
 			 * @param {Function} [callback]
 			 */
 			function addEmbeddedCSS( cssText, callback ) {
-				var $style, styleEl;
+				var $style, styleEl, newCssText;
 
 				function fireCallbacks() {
 					var oldCallbacks = cssCallbacks;
@@ -936,7 +936,9 @@
 								// write, dropping @media queries from the CSS text. If we read it and used its
 								// value, we would accidentally apply @media-specific styles to all media. (T108727)
 								if ( document.documentMode === 9 ) {
-									styleEl.styleSheet.cssText = $style.data( 'ResourceLoaderDynamicStyleTag' ) + cssText;
+									newCssText = $style.data( 'ResourceLoaderDynamicStyleTag' ) + cssText;
+									styleEl.styleSheet.cssText = newCssText;
+									$style.data( 'ResourceLoaderDynamicStyleTag', newCssText );
 								} else {
 									styleEl.styleSheet.cssText += cssText;
 								}