Node Server Port

How do you log you Node.js server port number?

Let’s say you use Node.js and start a server with:

server.listen(1337, function(){'Server listening on port ' + 1337);

Or maybe you use Express.js and something similar to this:

server.listen(app.get('port'), function(){'Server listening on port ' + app.get('port'));

It works. However, the better way is to use:


For example, for Node.js server:

server.listen(1337, function(){'Server listening on port ' + this.address().port);

This way you get the real port number which in some weird edge cases might be different from the number that you supplied to listen.

You can also use this style:

server.listen(app.get('port'), function(){'Server listening on port ' + server.address().port);

PS: You can still get advantage of the 50% super early bird ticket price for the live in-person Node.js training on March 28-29 in San Francisco, CA.

Author: Azat

Techies, entrepreneur, 20+ years in tech/IT/software/web development expert: NodeJS, JavaScript, MongoDB, Ruby on Rails, PHP, SQL, HTML, CSS. 500 Startups (batch Fall 2011) alumnus.

2 thoughts on “Node Server Port”

  1. Hi Azat,
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    Best Regards

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