webpack.config.js

// webpack.config.js
const path = require('path')
const webpack = require('webpack')
const node_modules = path.resolve(__dirname, 'node_modules')
const pathToReact = path.resolve(node_modules, 'react/dist/react.js')

const config = {
    entry: {
        demo: [ path.resolve(__dirname, 'demo/demo.js') ],
    },
    output: {
        path: path.resolve(__dirname, 'demo/build'),
        filename: '[name].bundle.js'
    },
    resolve: {
      extensions: ['', '.js', '.jsx']
    },
    module: {
        loaders: [
            {
                test: /\.js?$/,
                exclude: /node_modules/,
                loaders: ['react-hot', 'babel']
            },
            {
                test: /\.scss$/,
                loader: "style!css!sass?outputStyle=expanded=includePaths[]=" + node_modules + "/bootstrap-sass/assets/stylesheets/"
            },
            {
                test: /\.(png|jpg|jpeg|gif|woff|woff2|eot|ttf|svg)$/,
                loader: 'url-loader?limit=100000'
            },
            {
                include: /\.json$/, loaders: ["json-loader"],
                extensions: ['', '.json', '.jsx', '.js']
            }
        ],
    }
}

module.exports = config