webpack.config.js

const path = require('path');

module.exports = {
    mode: 'production',
    entry: "./src/BasicWorldMap.tsx",
    output: {
        path: path.resolve(__dirname, 'lib'),
        filename: 'BasicWorldMap.js',
        libraryTarget: 'commonjs2'
    },
    module: {
        rules: [
            {
                test: /\.(js|jsx)$/,
                exclude: /node_modules/,
                use: {
                    loader: "babel-loader"
                }
            },
            {
                test: /\.tsx?$/,
                use: 'ts-loader',
                exclude: /node_modules/,
            },
            {
                test: /\.css$/i,
                use: ['style-loader', 'css-loader']
            }
        ]
    },
    resolve: {
        alias: {
            'react': path.resolve(__dirname, './node_modules/react'),
            'react-dom': path.resolve(__dirname, './node_modules/react-dom'),
        }
    },
    externals: {
        react: {
            commonjs: "react",
            commonjs2: "react",
            amd: "React",
            root: "React"
        },
        "react-dom": {
            commonjs: "react-dom",
            commonjs2: "react-dom",
            amd: "ReactDOM",
            root: "ReactDOM"
        }
    }
};