webpack.config.js

const ExtractTextPlugin = require('extract-text-webpack-plugin')

module.exports = {
    target: 'electron-renderer',
    entry: './src/renderer_process/app/entry.js',
    output: {
        path: __dirname + '/src/renderer_process/build',
        publicPath: 'build/',
        filename: 'bundle.js'
    },
    module: {
        rules: [{
            exclude: /node_modules/,
            test: /\.jsx?$/,
            loader: 'babel-loader'
        },{
            test: /\.css$/,
            loader: ExtractTextPlugin.extract({
                loader: 'css-loader',
                options: {
                modules: true
                }
            })
        },{
            test: /\.(png|jpg|gif|svg)$/,
            loader: 'file-loader',
            options: {
                name: 'img/[name].[ext]'
            }
        },{
            test: /\.(woff2)$/,
            loader: 'file-loader',
            options: {
                name: 'fonts/[name].[ext]'
            }
        }]
    },
    plugins: [
        new ExtractTextPlugin({ filename: 'bundle.css' })
    ],
    resolve: {
      extensions: ['.js', '.json', '.jsx']
    }
}