webpack.config.js

const path = require('path');
// const webpack = require('webpack');
const HtmlWebpackPlugin = require('html-webpack-plugin');
const ExtractTextPlugin = require('extract-text-webpack-plugin');

module.exports = {
  entry: [path.resolve(__dirname, './src/index.js')],
  target: 'electron-renderer',
  output: {
    path: path.resolve(__dirname, './build'),
    filename: 'bundle.js',
  },
  module: {
    loaders: [
      {
        test: /\.js$/,
        exclude: /node_modules/,
        loader: 'babel-loader',
        query: {
          presets: ['es2015', 'react', 'stage-1', 'stage-3'],
          plugins: ['transform-decorators-legacy', 'transform-class-properties'],
        },
      },
      { test: /\.css$/,
        loader: ExtractTextPlugin.extract({
          fallbackLoader: 'style-loader',
          loader: 'css-loader!postcss-loader',
        }),
      },
    ],
  },
  plugins: [
    new ExtractTextPlugin('style.css'),
    new HtmlWebpackPlugin({
      title: 'test',
      filename: 'index.html',
    }),
  ],
};