Webpack + React + Sass

package.json

{
  "name": "webpack-r",
  "version": "1.0.0",
  "description": "",
  "main": "main.js",
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1",
    "build": "webpack-dev-server",
    "build:prod": "webpack -p"
  },
  "author": "",
  "license": "ISC",
  "devDependencies": {
    "babel-core": "^6.25.0",
    "babel-loader": "^7.1.1",
    "babel-preset-es2015": "^6.24.1",
    "babel-preset-react": "^6.24.1",
    "css-loader": "^0.28.4",
    "extract-text-webpack-plugin": "^2.1.2",
    "node-sass": "^4.5.3",
    "sass-loader": "^6.0.6",
    "style-loader": "^0.18.2",
    "webpack": "^3.0.0",
    "webpack-dev-server": "^2.5.0"
  },
  "dependencies": {
    "react": "^15.6.1",
    "react-dom": "^15.6.1"
  }
}

webpack.config.js

/* 
 === don't forge to add style file to html ===
	<link rel="stylesheet" type="text/css" href="./dist/bundle.css">
*/

/* === quick try ===

import React from 'react';
import ReactDOM from 'react-dom';
import './main.css';

ReactDOM.render(
  <h1>Hello, world!</h1>,
  document.getElementById('root')
);

*/


var path = require('path');
var ExtractTextPlugin = require('extract-text-webpack-plugin');

var extractPlugin = new ExtractTextPlugin({
   filename: 'bundle.css'
});

module.exports = {
    entry: './main.js',
    output: {
        path: path.resolve(__dirname, 'dist'),
        filename: 'bundle.js',
        publicPath: '/dist'
    },
    module: {
        rules: [
            {
                test: /\.js$/,
                use: [
                    {
                        loader: 'babel-loader',
                        options: {
                            presets: ['es2015' ,'react']
                        }
                    }
                ]
            },
            {
                test: /\.scss$/,                    // made scss
                use: extractPlugin.extract({
                    use: ['css-loader', 'sass-loader']
                })
            }
        ]
    },
    plugins: [
        extractPlugin
    ]
};