fix(webpack): Strip all comments in css/js bundles.

frontend/CHANGELOG.md

@@ -10,8 +10,11 @@ The latest version of this document is always available in
 
 ## [Unreleased]
 
+## [3.1.3]
+- fix(webpack): Strip all comments in css/js bundles.
+
 ## [3.1.2]
-- chore(package): update webpack to version 4.17.1 ivaosthu 22.08.18 17:04
+- chore(package): update webpack to version 4.17.1
 - chore(package): move all dependencies to devDependencies as they are not used outside this module.  
 
 ## [3.1.1]

frontend/package.json

@@ -65,6 +65,7 @@
     "mini-css-extract-plugin": "^0.4.1",
     "node-sass": "^4.5.3",
     "normalize.css": "^8.0.0",
+    "optimize-css-assets-webpack-plugin": "^5.0.0",
     "prettier": "^1.8.2",
     "prop-types": "^15.6.2",
     "react": "^16.4.2",
@@ -83,6 +84,7 @@
     "sass-loader": "^7.0.1",
     "style-loader": "^0.22.0",
     "toolbox-loader": "0.0.3",
+    "uglifyjs-webpack-plugin": "^1.3.0",
     "webpack": "^4.17.1",
     "webpack-cli": "^3.1.0",
     "webpack-dev-server": "^3.1.5",

frontend/webpack.config.js

@@ -4,6 +4,8 @@
 const path = require('path');
 const webpack = require('webpack');
 const MiniCssExtractPlugin = require('mini-css-extract-plugin');
+const UglifyJsPlugin = require('uglifyjs-webpack-plugin');
+const OptimizeCssAssetsPlugin = require('optimize-css-assets-webpack-plugin');
 const devMode = process.env.NODE_ENV !== 'production';
 const mode = process.env.NODE_ENV === 'production' ? 'production' : 'development';
 const entry = ['whatwg-fetch', './src/index'];
@@ -41,6 +43,23 @@ module.exports = {
         publicPath: '/static/',
     },
 
+    optimization: {
+        minimizer: [
+            new UglifyJsPlugin({
+                uglifyOptions: {
+                    output: {
+                        comments: false
+                    },
+                },
+            }),
+            new OptimizeCssAssetsPlugin({
+                cssProcessor: require('cssnano'),
+                cssProcessorOptions: { discardComments: { removeAll: true } },
+                canPrint: true,
+            }),
+        ],
+    },
+
     module: {
         rules: [
             {