webpack.build.config.js

const webpack = require('webpack');
const path = require('path');
const HtmlWebpackPlugin = require('html-webpack-plugin');
const MiniCssExtractPlugin = require('mini-css-extract-plugin');

// Any directories you will be adding code/files into, need to be added to this array so webpack will pick them up
const defaultInclude = path.resolve(__dirname, 'src');

module.exports = {
	module: {
		rules: [
			{
				test: /\.scss$/,
				use: [
					MiniCssExtractPlugin.loader,
					'css-loader',
					'sass-loader'
				],
				include: defaultInclude
			},
			{
				test: /\.js?$/,
				use: [
						{
								loader: 'babel-loader',
								options: {
										presets: ['env', 'metal-jsx'],
								}
						}
				],
				include: defaultInclude
			},
			{
				test: /\.(jpe?g|png|gif)$/,
				use: [{ loader: 'file-loader?name=img/[name]__[hash:base64:5].[ext]' }],
				include: defaultInclude
			},
			{
				test: /\.(eot|svg|ttf|woff|woff2)$/,
				use: [{ loader: 'file-loader?name=font/[name]__[hash:base64:5].[ext]' }],
				include: defaultInclude
			}
		]
	},
	target: 'electron-renderer',
	plugins: [
		new HtmlWebpackPlugin(),
		new MiniCssExtractPlugin({
			// Options similar to the same options in webpackOptions.output
			// both options are optional
			filename: 'bundle.css',
			chunkFilename: '[id].css'
		}),
		new webpack.DefinePlugin({
			'process.env.NODE_ENV': JSON.stringify('production')
		})
	],
	stats: {
		colors: true,
		children: false,
		chunks: false,
		modules: false
	}
};