From 660e79ffe99da64f495191c609b1c37addfd70ff Mon Sep 17 00:00:00 2001
From: Jakub Pawlowicz <contact@jakubpawlowicz.com>
Date: Sat, 2 Aug 2014 10:41:12 +0100
Subject: [PATCH] Refixes #325 - invalid charset declarations.

* All incorrect, non-lowercase charsets are being now removed.
* Removes stripping @IMPORT declarations.
---
 History.md        | 1 +
 lib/clean.js      | 4 +++-
 test/unit-test.js | 4 ++++
 3 files changed, 8 insertions(+), 1 deletion(-)

diff --git a/History.md b/History.md
index 8db3e3da..c3c79b34 100644
--- a/History.md
+++ b/History.md
@@ -3,6 +3,7 @@
 
 * Fixed issue with tokenizer removing first selector after an unknown @ rule.
 * Fixed issue [#329](https://github.com/GoalSmashers/clean-css/issues/329) - font shorthands incorrectly processed.
+* Refixed issue [#325](https://github.com/GoalSmashers/clean-css/issues/325) - invalid charset declarations.
 
 [2.2.11 / 2014-07-28](https://github.com/GoalSmashers/clean-css/compare/v2.2.10...v2.2.11)
 ==================
diff --git a/lib/clean.js b/lib/clean.js
index 88434137..704c2d8d 100644
--- a/lib/clean.js
+++ b/lib/clean.js
@@ -190,7 +190,9 @@ var minify = function(data, callback) {
   });
 
   // remove invalid special declarations
-  replace(/@(?:IMPORT|CHARSET) [^;]+;/g, '');
+  replace(/@charset [^;]+;/ig, function (match) {
+    return match.indexOf('@charset') > -1 ? match : '';
+  });
 
   // whitespace inside attribute selectors brackets
   replace(/\[([^\]]+)\]/g, function(match) {
diff --git a/test/unit-test.js b/test/unit-test.js
index accc8b16..fc5ba6bd 100644
--- a/test/unit-test.js
+++ b/test/unit-test.js
@@ -225,6 +225,10 @@ vows.describe('clean-units').addBatch({
     'uppercase charset': [
       "@CHARSET 'utf-8';h1{color:red}",
       'h1{color:red}'
+    ],
+    'mixed case charset': [
+      "@chArSET 'utf-8';h1{color:red}",
+      'h1{color:red}'
     ]
   }, { keepBreaks: true }),
   'line breaks and important comments': cssContext({
-- 
2.34.1