webpack.config.js

const path = require('path');

module.exports = {
    entry: './src/index.js',
    output: {
        path: path.resolve(__dirname, 'dist'),
        filename: 'bundle.js',
        library: 'Replay',
        libraryTarget: 'window',
    },
    module: {
        rules: [
            {
                test: /\.png$/,
                include: [
                    path.resolve(__dirname, 'src'),
                ],
                exclude: /node_modules/,
                use: [
                    {
                        loader: 'file-loader',
                        options: {
                            publicPath: '../dist',
                        },
                    },
                ],
            },
            {
                test: /\.js$/,
                include: [
                    path.resolve(__dirname, 'src'),
                ],
                exclude: /node_modules/,
                use: {
                    loader: 'babel-loader',
                    options: {
                        presets: ['@babel/preset-env'],
                        plugins: ['@babel/plugin-proposal-class-properties'],
                    },
                },
            },
        ],
    },
    devtool: 'source-map',
    mode: 'development',
};