require().server. Require with a dot in the statement

Question

require().server. Require with a dot in the statement

                var WebSocketServer = require('websocket').server;

I came across this in some NodeJS code and I don't believe I have ever seen a require with a dot in the statement like this ever before. Is the dot perhaps loading just a portion of the websocket module or is there another meaning to it?

Thanks in advance...

node.js
module
require

Answer 1

Out of the object exported by module.exports you are taking the object referred by server key.

If you look at the code you could see that it is requiring this module