Node.js server.listen() Method

Example

Create a server that listens on port 8080 of your computer.

When port 8080 get accessed, write "Hello World!" back as a response:

var http = require('http');
http.createServer(function (req, res) {
  res.writeHead(200, {'Content-Type': 'text/plain'});
  res.write('Hello World!');
  res.end();
}).listen(8080);

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Definition and Usage

The server.listen() method creates a listener on the specified port or path.

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Syntax

server.listen(port, hostname, backlog, callback);

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Parameter Values

Parameter	Description
port	Optional. Specifies the port we want to listen to
hostname	Optional. Specifies the IP address we want to listen to
backlog	Optional. Specifies the max length of the queue of pending connections. Default 511
callback	Optional. Specifies a function to be executed when the listener has been added

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Technical Details

Return Value:	None
Node.js Version:	0.1.90

ref : https://www.w3schools.com/nodejs/met_server_listen.asp