CSS Modules and Global CSS with Webpack 1.x

app.css

/*
  This file contains non-global CSS modules
*/

@import "css/variables";
@import "css/utilities";

:global html {
  color: var(--black);
}

:global html,
:global button,
:global input,
:global textarea {
  font-family: "Helvetica Neue", "Helvetica", sans-serif;
}

:global body {
  margin: 0;
}

index.js

import 'css/vendor.global.css';
import 'css/app.css';

vendor.global.css

/*
  Include globally-scoped CSS imports in this file. This bypasses
  locally-scoped CSS modules, so all classes in this file are global.
*/
@import 'basscss';
@import 'basscss-responsive-type-scale';
@import 'quill/dist/quill.snow';
@import 'rome/dist/rome.css';

webpack.config.js

// Webpack 1.13.0
var path = require('path');
var webpack = require('webpack');
var HtmlWebpackPlugin = require('html-webpack-plugin');
var CopyWebpackPlugin = require('copy-webpack-plugin');

var env = process.env.NODE_ENV || 'development';
var isProduction = env.match(/(production|dev|qa)$/);
var cssModuleIdentName = env.match(/development|local/) ? '[path][name]---[local]---[hash:base64:5]' : '[hash:base64]';

var config = module.exports = {
  entry: [
    './src/index',
  ],
  plugins: [
    new webpack.DefinePlugin({
      'process.env': {
        NODE_ENV: JSON.stringify(isProduction ? 'production' : 'development'),
      },
    }),
  ],
  module: {
    noParse: /node_modules\/quill\/dist/,
    preLoaders: [
      {
        test: /\.jsx?$/,
        loaders: ['eslint'],
        exclude: /node_modules/,
      }
    ],
    loaders: [
      {
        test: /\.jsx?$/,
        loaders: ['babel'],
        include: [
          path.join(__dirname, 'src'),
        ],
      },
      {
        test: /\.jpe?g$|\.gif$|\.png$|\.svg$/,
        loader: 'file?name=./static/[name].[hash:8].[ext]',
        include: path.join(__dirname, 'src', 'public', 'img'),
      }
    ]
  },
  postcss: function(webpackInstance) {
    return [
      require('postcss-import')({
        addDependencyTo: webpackInstance,
        path: [
          path.join(__dirname, 'src'),
          'node_modules',
        ]
      }),
      require('postcss-cssnext')(),
      require('postcss-inline-svg')({
        path: path.join(__dirname, 'src'),
      }),
      require('postcss-svgo'),
    ];
  },
  resolve: {
    extensions: ['', '.js', '.jsx', '.css'],
    modulesDirectories: [
      path.join(__dirname, 'src'),
      'node_modules',
    ],
  },
};

if (isProduction) {
  var ExtractTextPlugin = require('extract-text-webpack-plugin');

  config.devtool = 'source-map';
  config.output = {
    path: path.join(__dirname, 'dist'),
    filename: 'static/bundle.js?v=[chunkhash:8]',
    publicPath: '/'
  };
  config.module.loaders.push({
    test: /\.css/,
    exclude: /\.global\.css$/,
    loader: ExtractTextPlugin.extract('style', 'css?modules&importLoaders=1&localIdentName=' + cssModuleIdentName + '!postcss')
  });
  config.module.loaders.push({
    test: /\.global\.css$/,
    loader: 'style!css!postcss'
  });
  config.plugins.push(
    new HtmlWebpackPlugin({
      template: 'index.html',
      minify: {
        removeComments: true,
        collapseWhitespace: true,
        removeRedundantAttributes: true,
        useShortDoctype: true,
        removeEmptyAttributes: true,
        removeStyleLinkTypeAttributes: true,
        keepClosingSlash: true,
        minifyJS: true,
        minifyCSS: true,
      }
    }),
    new webpack.optimize.OccurenceOrderPlugin(),
    new webpack.optimize.DedupePlugin(),
    new webpack.optimize.UglifyJsPlugin({
      compressor: {
        screw_ie8: true,
        warnings: false
      }
    }),
    new ExtractTextPlugin('static/styles.css?v=[contenthash:8]'),
    new CopyWebpackPlugin([
      { from: 'robots.txt' },
    ])
  );
} else {
  config.devtool = 'eval';
  config.output = {
    path: path.join(__dirname, 'dist'),
    filename: 'bundle.js',
    publicPath: '/',
  };
  config.entry.unshift(
    'webpack-dev-server/client?http://localhost:3002',
    'webpack/hot/only-dev-server',
    'react-hot-loader/patch'
  );
  config.module.loaders.push({
    test: /\.css$/,
    exclude: /\.global\.css$/,
    loader: 'style!css?modules&importLoaders=1&localIdentName=' + cssModuleIdentName + '!postcss'
  });
  config.module.loaders.push({
    test: /\.global\.css$/,
    loader: 'style!css!postcss'
  });
  config.plugins.push(
    new HtmlWebpackPlugin({
      template: 'index.html'
    }),
    new webpack.HotModuleReplacementPlugin(),
    new webpack.NoErrorsPlugin()
  );
}