Replace uglify-js with uglify-es since it supports ES6 minification #48

lib/modules/minifyJs.es6

@@ -1,4 +1,4 @@
-import uglifyJs from 'uglify-js';
+import uglifyJs from 'uglify-es';
 
 
 /** Minify JS with UglifyJS */

package.json

@@ -31,7 +31,7 @@
     "posthtml": "^0.11.3",
     "posthtml-render": "^1.1.3",
     "svgo": "^1.0.5",
-    "uglify-js": "^3.3.14"
+    "uglify-es": "^3.3.9"
   },
   "devDependencies": {
     "babel-cli": "^6.26.0",

test/modules/minifyJs.js

@@ -21,6 +21,17 @@ describe('minifyJs', () => {
         );
     });
 
+    it('should minify ES6 inside <script>', () => {
+        return init(
+            `<script>
+                const f  =  5 + 10;
+                let a = (b) => { return b * 5; };
+            </script>`,
+            '<script>const f=15;let a=t=>5*t;</script>',
+            options,
+        );
+    });
+
     it('should minify JS inside on* attributes', () => {
         return init(
             '<a href="#" onclick="return function () {};">click</a>',