webpack.config.js

const path = require('path')
const CopyPlugin = require('copy-webpack-plugin')
const HtmpPlugin = require('html-webpack-plugin')

module.exports = {
    entry: './src/main.js',
    output: {
        filename: ('bundle.[contenthash].js'),
        path: path.resolve(__dirname, 'build'),
        clean: true,
    },
    devtool: 'source-map',
    plugins: [
        new HtmpPlugin({
            template: 'public/index.html',
        }),
        new CopyPlugin({
            patterns: [
                {
                    from: 'public',
                    globOptions: {
                        ignore: ['**/index.html'],
                    },
                },
            ],
        }),
    ],
    module: {
        rules: [
            {
                test: /\.js$/,
                exclude: /(node_modules)/,
                use: {
                    loader: 'babel-loader',
                    options: {
                        presets: ['@babel/preset-env']
                    },
                },
            },
        ],
    },
};