From 731dd78677a659b7f1bbc0cd588cc03920f88e52 Mon Sep 17 00:00:00 2001
From: Ori Livneh <ori@wikimedia.org>
Date: Sun, 22 Feb 2015 17:07:36 -0800
Subject: [PATCH] Small optimization to ResourceLoader's
 canExpandStylesheetWith()

The import CSS at-rule can only go in the very top of a style sheet.
(Technically, the charset at-rule may precede it, but that rule is not valid
for style sheets that are embedded in <style> tags.) So we don't need to scan
the entire CSS text for '@import' -- we just have to make sure that the CSS
text doesn't start with it.

Change-Id: I56c2ebd55d4a7e90dde8e89e76b6d1b52ed004f8
---
 resources/src/mediawiki/mediawiki.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/resources/src/mediawiki/mediawiki.js b/resources/src/mediawiki/mediawiki.js
index 43c6422e92..90b8503266 100644
--- a/resources/src/mediawiki/mediawiki.js
+++ b/resources/src/mediawiki/mediawiki.js
@@ -777,7 +777,7 @@
 				// Makes sure that cssText containing `@import`
 				// rules will end up in a new stylesheet (as those only work when
 				// placed at the start of a stylesheet; bug 35562).
-				return cssText.indexOf( '@import' ) === -1;
+				return cssText.slice( 0, '@import'.length ) !== '@import';
 			}
 
 			/**
-- 
2.20.1