Add Tree Shaking optimization

packages/mindplot/lang/Messages.js

@@ -0,0 +1,44 @@
+/*
+ *    Copyright [2015] [wisemapping]
+ *
+ *   Licensed under WiseMapping Public License, Version 1.0 (the "License").
+ *   It is basically the Apache License, Version 2.0 (the "License") plus the
+ *   "powered by wisemapping" text requirement on every single page;
+ *   you may not use this file except in compliance with the License.
+ *   You may obtain a copy of the license at
+ *
+ *       http://www.wisemapping.org/license
+ *
+ *   Unless required by applicable law or agreed to in writing, software
+ *   distributed under the License is distributed on an "AS IS" BASIS,
+ *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *   See the License for the specific language governing permissions and
+ *   limitations under the License.
+ */
+
+mindplot.Messages = new Class({
+    Static: {
+        init: function (locale) {
+            locale = $defined(locale) ? locale : 'en';
+            var bundle = mindplot.Messages.BUNDLES[locale];
+            if (bundle == null && locale.indexOf("_") != -1) {
+                // Try to locate without the specialization ...
+                locale = locale.substring(0, locale.indexOf("_"));
+                bundle = mindplot.Messages.BUNDLES[locale];
+            }
+            mindplot.Messages.__bundle = bundle;
+        }
+    }
+});
+
+$msg = function (key) {
+    if (!mindplot.Messages.__bundle) {
+        mindplot.Messages.init('en');
+    }
+
+    var msg = mindplot.Messages.__bundle[key];
+    return msg ? msg : key;
+};
+
+mindplot.Messages.BUNDLES = {};
+

packages/mindplot/webpack.common.js

@@ -10,6 +10,9 @@ module.exports = {
       type: 'umd',
     },
   },
+  optimization: {
+    usedExports: true,
+  },
   module: {
     rules: [
       {