From ed2efab1306b394f8b7698ad572e0e6c73a80fd6 Mon Sep 17 00:00:00 2001
From: Yangfan <15234408101@163.com>
Date: Wed, 20 Jun 2018 16:02:52 +0800
Subject: [PATCH] Update uglifycss-lib.js

Remove @charset for other files, except the first one
---
 uglifycss-lib.js | 13 +++++++++++--
 1 file changed, 11 insertions(+), 2 deletions(-)

diff --git a/uglifycss-lib.js b/uglifycss-lib.js
index 19d686e..a30b46e 100644
--- a/uglifycss-lib.js
+++ b/uglifycss-lib.js
@@ -846,8 +846,17 @@ function processFiles(filenames = [], options = defaultOptions) {
         }
     })
 
-    // return concat'd results
-    return uglies.join('')
+    // Remove @charset for other files, except the first one
+    let pattern = /@charset[^;]+;/g;
+    const CHARSET_UTF8 = '@charset "utf-8;';
+    return uglies.map((item, n) => {
+        if (n === 0) {
+            let isHasCharset = uglies[0].match(pattern) || [];
+            return !isHasCharset[0] ? CHARSET_UTF8+item : item;
+        } else {
+            return item.replace(pattern, "");
+        }
+    }).join('');  // return concat'd results
 }
 
 module.exports = {