webpack.config.js

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

module.exports = {

    entry: './src/index.js',

    output: {
        path: path.join(__dirname, '/dist'),
        filename: 'bundle.js'
    },

    plugins: [
        new HTMLWebpackPlugin({
            template: './src/index.html'
        })
    ],

    module: {
        rules: [
            {
                test: /.js$/,
                exclude: /node_modules/,
                use: {
                    loader: 'babel-loader',
                    options:{
                        presets: ['@babel/preset-env', '@babel/preset-react']
                    }
                }
            },
            {
                test: /\.s[ac]ss$/i,
                use: [
                  // Creates `style` nodes from JS strings
                  'style-loader',
                  // Translates CSS into CommonJS
                  'css-loader',
                  // Compiles Sass to CSS
                  'sass-loader',
                ],
              }
        ]
    }

}