only adding alias when present

Author: weaverryan

lib/config-generator.js

@@ -73,11 +73,13 @@ class ConfigGenerator {
 
         config.resolve = {
             extensions: ['.js', '.jsx', '.vue'],
-            alias: {
-                'vue$': 'vue/dist/vue.esm.js',
-            }
+            alias: {}
         };
 
+        if (this.webpackConfig.useVueLoader) {
+            config.resolve.alias['vue$'] = 'vue/dist/vue.esm.js';
+        }
+
         return config;
     }