'use strict'; var express = require('express'); var app = express(); app.use('/', function (req, res) { res.setHeader('Content-Type', 'text/html; charset=utf-8'); res.end('Hello, World!\n\nšŸ’š šŸ”’.js'); }); // DO NOT DO app.listen() unless we're testing this directly if (require.main === module) { app.listen(3000); } // Instead do export the app: module.exports = app;