webpack.config.main.js

const webpack = require('webpack');
const path = require(`path`);

var options = {
  devtool: 'source-map',
  target: 'electron-main',
  entry: './src/main.js',

  output: {
    path: __dirname + '/build/',
    publicPath: '',
    filename: 'main.js',
    sourceMapFilename: 'main.js.map',
    chunkFilename: '[id].chunk.js'
  },

  resolve: {
    extensions: ['.ts','.js','.jsx','.json', '.css', '.html']
  },
  /**
   * Disables webpack processing of __dirname and __filename.
   * If you run the bundle in node.js it falls back to these values of node.js.
   * https://github.com/webpack/webpack/issues/2010
   */
  node: {
    __dirname: false,
    __filename: false
  },

  plugins: [
    new webpack.NamedModulesPlugin()
  ],
  module: {
    rules: [
      {
        test: /\.(png|jpg|gif|icns|html)$/,
        exclude: path.resolve(__dirname, `env.json`),
        use: [
          {
            loader: 'file-loader',
            options: {
              name: '[name].[ext]'
            }
          }
        ]
      }
    ]
  }

};

module.exports = options;