Simplest config for just TS building

webpack.config.js

const { join }     = require('path');
const webpack      = require('webpack');
const DefinePlugin = webpack.DefinePlugin;

module.exports = {
    target  : 'web',
    entry   : './src/index.tsx',
    output  : {
        chunkFilename : '[id].index.js',
        filename      : 'index.js',
        path          : join(process.cwd(), 'build'),
        publicPath    : `/example/`,
    },
    devtool : 'source-map',
    watch   : true,
    resolve : { extensions : ['.tsx', '.ts', '.js'] },
    plugins : [new DefinePlugin({ 'process.env.NODE_ENV' : JSON.stringify(process.env.NODE_ENV || 'development') })],
    module  : {
        rules : [
            {
                test    : /\.tsx?$/,
                exclude : /node_modules/,
                use     : [{ loader : 'ts-loader' }],
            },
            {
                test    : /\.json$/,
                exclude : /node_modules/,
                use     : [{ loader : 'json-loader' }],
            },
        ],
    },
};