webpack.config.js

const path = require('path');

const HtmlWebpackPlugin = require('html-webpack-plugin');

const ExtractTextPlugin = require("extract-text-webpack-plugin");

const HtmlWebpackPluginConfig = new HtmlWebpackPlugin({
  template: './client/index.html',
  filename: 'index.html',
  inject: 'body'
})

const extractSass = ExtractTextPlugin.extract({
  use: [{
    loader: "css-loader",
    query: {
      modules: true,
      localIdentName: '[name]__[local]___[hash:base64:5]'
    }
  }, {
    loader: "sass-loader"
  }],
  fallback: "style-loader"
})

module.exports = {
  entry: './client/index.js',
  output: {
    path: path.resolve('dist'),
    filename: 'index_bundle.js'
  },
  module: {
    loaders: [
      { test: /\.(js|jsx)$/, loader: 'babel-loader', exclude: /node_modules/ },
      { test: /\.scss/, loader: extractSass, exclude: /node_modules/ }
    ]
  },
  plugins: [
    HtmlWebpackPluginConfig,
    new ExtractTextPlugin("styles.css")
  ]
}