minify css

* https://survivejs.com/webpack/optimizing/minifying/

1 files changed, 12 insertions, 0 deletions

diff --git a/webpack.parts.js b/webpack.parts.js
index 0ea5533..3d8503f 100644
--- a/webpack.parts.js
+++ b/webpack.parts.js
@@ -4,6 +4,8 @@ const CleanWebpackPlugin = require('clean-webpack-plugin');
 const webpack = require('webpack');
 const GitRevisionPlugin = require('git-revision-webpack-plugin');
 const UglifyWebpackPlugin = require('uglifyjs-webpack-plugin');
+const OptimizeCSSAssetsPlugin = require('optimize-css-assets-webpack-plugin');
+const cssnano = require('cssnano');
 
 exports.extractCSS = ({ include, exclude, use = [] }) => {
   const plugin = new MiniCssExtractPlugin({
@@ -115,3 +117,13 @@ exports.minifyJavaScript = () => ({
     minimizer: [new UglifyWebpackPlugin({ sourceMap: true })],
   },
 });
+
+exports.minifyCSS = ({ options }) => ({
+  plugins: [
+    new OptimizeCSSAssetsPlugin({
+      cssProcessor: cssnano,
+      cssProcessorOptions: options,
+      cssPrint: false,
+    }),
+  ]
+});