webpack.prod.js

const merge = require("webpack-merge");
const HtmlWebpackPlugin = require("html-webpack-plugin");
const webpack = require("webpack");
const UglifyJSPlugin = require("uglifyjs-webpack-plugin");
const common = require("./webpack.common.js");
const ExtractTextPlugin = require("extract-text-webpack-plugin");
const postcssCssnext = require("postcss-cssnext");

module.exports = merge(common, {
  module: {
    rules: [
      {
        test: /\.css$/,
        exclude: /node_modules/,
        use: ExtractTextPlugin.extract({
          fallback: "style-loader",
          use: [
            {
              loader: "css-loader",
              options: {
                importLoaders: 1,
                modules: true,
                localIdentName: "[name]__[local]__[hash:base64:5]",
                minimize: true
              }
            },
            {
              loader: "postcss-loader",
              options: {
                ident: "postcss",
                plugins: () => [
                  postcssCssnext({
                    features: {
                      autoprefixer: {
                        browsers: ["> 1%", "last 2 versions"]
                      }
                    }
                  })
                ]
              }
            }
          ]
        })
      },
      {
        test: /\.svg$/,
        use: [
          {
            loader: "url-loader"
          }
        ]
      }
    ]
  },
  plugins: [
    new HtmlWebpackPlugin({
      template: __dirname + "/src/index.html",
      inject: "body"
    }),
    new UglifyJSPlugin(),
    new webpack.optimize.ModuleConcatenationPlugin(),
    new ExtractTextPlugin("styles.css")
  ]
});