webpack-config.js

module: {
    rules: [
      {
        test: /\.tsx?$/,
        exclude: /node_modules/,
        loader: 'tslint-loader',
        enforce: 'pre',
        options: {
          configFile: PATHS.configs.tslint,
          emitErrors: true,
          typeCheck: true,
          tsConfigFile: PATHS.configs.tsconfig,
        },
      },
      {
        test: /\.(s*)css$/,
        exclude: /node_modules/,
        use: ExtractTextPlugin.extract({
          fallback: {
            loader: 'style-loader',
            options: {
              sourceMap: false,
            }
          },
          use: [
            {
              loader: 'css-loader',
              options: {
                importLoaders: 2,
                localIdentName: '[name]__[hash:base64:6]',
                minimize: true,
                modules: true,
                namedExport: true,
                sourceMap: false,
              },
            },
            {
              loader: 'postcss-loader',
              options: {
                sourceMap: false,
              },
            },
            {
              loader: 'sass-loader',
              options: {
                sourceMap: false,
              },
            },
          ],
        })
      }
    ]
  }