Fix #1756 Resolved thread-safe issue on server side.

diff --git a/src/lib/format/format.js b/src/lib/format/format.js
index 43cfef00a565dcb04ab28682436ce919e965b80b..33486f1d566d6712869e84fc4bc7a3de16d97b1a 100644 (file)
--- a/src/lib/format/format.js
+++ b/src/lib/format/format.js
@@ -53,7 +53,7 @@ function makeFormatFunction(format) {
     }
 
     return function (mom) {
-        var output = '';
+        var output = '', i;
         for (i = 0; i < length; i++) {
             output += array[i] instanceof Function ? array[i].call(mom, format) : array[i];
         }