webpack config

const base = {
  devtool: 'source-map',
  module: {
    rules: [
      {
        test: /\.(js)$/,
        include: path.join(__dirname, 'src'),
        loader: 'babel-loader',
        options: {
          cacheDirectory: '.babel-cache',
          babelrc: true,
        },
      },
      {
        test: /\.scss$/,
        include: path.join(__dirname, 'src'),
        use: ExtractTextPlugin.extract({
          fallback: 'style-loader',
          use: [
            {
              loader: 'css-loader',
              options: {
                sourceMap: true,
              },
            },
            {
              loader: 'sass-loader',
              options: {
                sourceMap: true,
              },
            },
          ],
        }),
      },
      {
        test: /\.css$/,
        loaders: ['style-loader', 'css-loader'],
      },
    ],
  },
  output: {
    filename: '[name].js',
    path: path.resolve(__dirname, 'dist'),
    libraryTarget: 'umd',
  },
  plugins: [
    // new HtmlWebpackPlugin(),
    new CaseSensitivePathsPlugin(),
    new ExtractTextPlugin('style.css'),
  ],
};