webpack.config.babel.js

var cssnext = require('postcss-cssnext');
var postcssFocus = require('postcss-focus');
var postcssReporter = require('postcss-reporter');

var cssModulesIdentName = '[name]__[local]__[hash:base64:5]';
if (process.env.NODE_ENV === 'production') {
  cssModulesIdentName = '[hash:base64]';
}

module.exports = {
  output: {
    publicPath: '/',
    libraryTarget: 'commonjs2',
  },
  resolve: {
    extensions: ['.js', '.jsx'],
    modules: [
      'client',
      'node_modules',
    ],
  },
  module: {
    rules: [
      {
        test: /\.css$/,
        exclude: /node_modules\/(?!(react-big-calendar)\/).*/,
        use: [
          {
            loader: 'style-loader',
          },
          {
            loader: 'css-loader',
            options: {
              localIdentName: cssModulesIdentName,
              modules: true,
              importLoaders: 1,
              sourceMap: true,
            },
          },
          {
            loader: 'postcss-loader',
            options: {
              plugins: () => [
                postcssFocus(),
                cssnext({
                  browsers: ['last 2 versions', 'IE > 10'],
                }),
                postcssReporter({
                  clearMessages: true,
                }),
              ],
            },
          },
        ],
      },
      {
        test: /\.jpe?g$|\.gif$|\.png$|\.svg$/i,
        use: [
          {
            loader: 'url-loader',
            options: {
              limit: 10000,
            },
          },
        ],
      },
    ],
  },
};