webpack.dev.js

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

const url = 'http://localhost:8080/dist/';

const config = {
  entry: './app/app.jsx',
  plugins: [
    new HtmlWebpackPlugin({
      filename: '../index.html',
      template: 'index.ejs',
    }),
  ],
  output: {
    path: path.resolve(__dirname, 'dist'),
    filename: 'app.bundle.js',
    publicPath: url,
  },
  devtool: '#eval-source-map',
  devServer: {
    contentBase: path.join(__dirname, 'dist'),
    compress: true,
    publicPath: url,
  },
  module: {
    rules: [
      {
        test: /\.(js|jsx)$/,
        use: [
          {
            loader: 'babel-loader',
            options: {
              presets: ['es2015'],
            },
          },
        ],
        exclude: /node_modules/,
      },
      {
        test: /\.scss$/,
        use: [{
          loader: 'style-loader', // creates style nodes from JS strings
        }, {
          loader: 'css-loader', // translates CSS into CommonJS
        }, {
          loader: 'sass-loader', // compiles Sass to CSS
        }],
      },
    ],
  },
  resolve: {
    extensions: ['.js', '.jsx'],
  },
  target: 'electron',
};

module.exports = config;