optimizing and babel

brunch-config.js

@@ -20,13 +20,24 @@ exports.modules = {
 }
 
 exports.plugins = {
+  closurecompiler: {
+  },
+  /*
   uglify: {
     mangle: false,
   },
+  */
   postcss: {
     processors: [
       require('autoprefixer')(['last 8 versions']),
       require('csswring')()
     ]
+  },
+  babel: {
+    presets: [['env', {
+      targets: {
+        browsers: ['last 2 versions', 'safari >= 7']
+      }
+    }]]
   }
 };

package.json

@@ -1,16 +1,18 @@
 {
   "dependencies": {
     "@mapbox/shelf-pack": "^3.1.0",
-    "autoprefixer": "^7.2.2",
-    "csswring": "^6.0.2",
     "fabric": "^1.7.17",
     "fabric-customise-controls": "^0.3.6",
-    "jquery": "^3.2.1",
-    "postcss-brunch": "^2.1.0"
+    "jquery": "^3.2.1"
   },
   "devDependencies": {
     "auto-reload-brunch": "^2",
+    "autoprefixer": "^7.2.2",
+    "babel-brunch": "^6.1.1",
+    "babel-preset-env": "^1.6.1",
     "brunch": "^2",
-    "uglify-js-brunch": "^2"
+    "closure-compiler-brunch": "^0.1.6",
+    "csswring": "^6.0.2",
+    "postcss-brunch": "^2.1.0"
   }
 }