Minify es6 (#61)

* remove transpilation to es5

* update webpack config

* fix tests

.babelrc

@@ -1,12 +1,10 @@
 {
   "presets": [
-    ["es2015", {"modules": false}],
     "react"
   ],
   "plugins": [
     "transform-object-rest-spread",
-    "transform-class-properties",
-    "transform-async-to-generator"
+    "transform-class-properties"
   ],
   "env": {
     "test": {

package.json

@@ -30,7 +30,6 @@
     "release": "node ./scripts/release"
   },
   "dependencies": {
-    "babel-polyfill": "^6.26.0",
     "lodash.debounce": "^4.0.8",
     "prop-types": "^15.5.10",
     "query-string": "^5.0.0",
@@ -50,10 +49,9 @@
     "babel-core": "^6.26.0",
     "babel-eslint": "^8.0.1",
     "babel-loader": "^7.1.2",
-    "babel-plugin-transform-async-to-generator": "^6.24.1",
     "babel-plugin-transform-class-properties": "^6.24.1",
+    "babel-plugin-transform-es2015-modules-commonjs": "^6.26.0",
     "babel-plugin-transform-object-rest-spread": "^6.26.0",
-    "babel-preset-es2015": "^6.24.1",
     "babel-preset-react": "^6.24.1",
     "circular-dependency-plugin": "^4.2.0",
     "codecov": "^2.3.0",
@@ -78,6 +76,7 @@
     "react-test-renderer": "^16.0.0",
     "rimraf": "^2.6.2",
     "style-loader": "^0.18.2",
+    "uglifyjs-webpack-plugin": "^1.0.0-beta.2",
     "web-ext": "^2.0.0",
     "webext-i18n": "^1.1.0",
     "webpack": "^3.5.5",

src/pages/background/index.js

@@ -1,4 +1,3 @@
-import 'babel-polyfill';
 import {LOAD_STORAGE_DATA} from 'shared/redux-consts/meta';
 import store from './redux/store';
 import './redux/ext-store'; // init redux-webext store

src/pages/popup/index.js

@@ -1,4 +1,3 @@
-import 'babel-polyfill';
 import React from 'react';
 import ReactDOM from 'react-dom';
 import {Provider} from 'react-redux';

src/pages/settings/index.js

@@ -1,4 +1,3 @@
-import 'babel-polyfill';
 import React from 'react';
 import ReactDOM from 'react-dom';
 import {Provider} from 'react-redux';

webpack/prod.js

@@ -1,4 +1,5 @@
 const webpack = require('webpack');
+const UglifyJSPlugin = require('uglifyjs-webpack-plugin');
 const ExtractTextPlugin = require('extract-text-webpack-plugin');
 const {generateHtmlPlugins} = require('./utils');
 const {
@@ -32,17 +33,7 @@ module.exports = (target) => ({
             'process.env.NODE_ENV': JSON.stringify('production'),
             __DEV__: false,
         }),
-        new webpack.optimize.UglifyJsPlugin({
-            beautify: false,
-            mangle: {
-                screw_ie8: true,
-                keep_fnames: true,
-            },
-            compress: {
-                screw_ie8: true,
-            },
-            comments: false,
-        }),
+        new UglifyJSPlugin(),
         plugins.circularDependency,
         plugins.copy,
         plugins.shell(target),