also use hard-source-webpack-plugin in prod

config/webpack.common.js

@@ -8,6 +8,7 @@ const webpack = require('webpack');
  */
 const WebpackAssetsManifest = require('webpack-assets-manifest');
 const LodashModuleReplacementPlugin = require('lodash-webpack-plugin');
+const HardSourceWebpackPlugin = require('hard-source-webpack-plugin');
 const helpers = require('../src/lib/util/helpers');
 
 /*
@@ -127,6 +128,14 @@ module.exports = (options) => {
       new webpack.IgnorePlugin(/^\.\/lib\/deflate\.js/, /markdown-it-plantuml/),
       new webpack.IgnorePlugin(/^\.\/locale$/, /moment$/),
 
+      new HardSourceWebpackPlugin(),
+      new HardSourceWebpackPlugin.ExcludeModulePlugin([
+        {
+          // see https://github.com/mzgoddard/hard-source-webpack-plugin/blob/master/README.md#excludemoduleplugin
+          test: /mini-css-extract-plugin[\\/]dist[\\/]loader/,
+        },
+      ]),
+
       new LodashModuleReplacementPlugin({
         flattening: true,
       }),

config/webpack.dev.js

@@ -6,7 +6,6 @@
  * Webpack Plugins
  */
 const MiniCssExtractPlugin = require('mini-css-extract-plugin');
-const HardSourceWebpackPlugin = require('hard-source-webpack-plugin');
 const { BundleAnalyzerPlugin } = require('webpack-bundle-analyzer');
 const helpers = require('../src/lib/util/helpers');
 
@@ -58,14 +57,6 @@ module.exports = require('./webpack.common')({
       filename: '[name].bundle.css',
     }),
 
-    new HardSourceWebpackPlugin(),
-    new HardSourceWebpackPlugin.ExcludeModulePlugin([
-      {
-        // see https://github.com/mzgoddard/hard-source-webpack-plugin/blob/master/README.md#excludemoduleplugin
-        test: /mini-css-extract-plugin[\\/]dist[\\/]loader/,
-      },
-    ]),
-
     new BundleAnalyzerPlugin({
       analyzerMode: ANALYZE ? 'server' : 'disabled',
     }),