nodejs/doc/api/synopsis.markdown

Synopsis

An example of a web server written with Node which responds with 'Hello World':

var http = require('http');

http.createServer(function (request, response) {
  response.writeHead(200, {'Content-Type': 'text/plain'});
  response.end('Hello World\n');
}).listen(8124);

console.log('Server running at http://127.0.0.1:8124/');

To run the server, put the code into a file called example.js and execute it with the node program

> node example.js
Server running at http://127.0.0.1:8124/

All of the examples in the documentation can be run similarly.