In Node.JS, by doing require('net'), do you not do require('event')?

Question

The code I'm looking at does not have "require('event')" anywhere, and yet I see this code

server.on('error', function (e) {
  if (e.code == 'EADDRINUSE') {
    console.log('Address in use, retrying...');
    setTimeout(function () {
      //server.close();
      server.listen(port);//PORT, HOST);
    }, 1000);
  }
  else{ .......

That uses "on".

And looking at this line

var net = require('net')

and this line

var server = net.createServer();

makes me think that doing require('net') already includes doing require('event').

Is this right?

Answer 1

The documentation makes it quite clear that net.Server is an EventEmitter, so EventEmitter's properties and methods (including .on()) are inherited.