Observe when something in your node app starts listening on a TCP port.
npm install on-net-listen
async_hooks behind the scenes and requires Node >=9
var onnetlisten =var http =var server = httpserver // will trigger the above listener
var emitter = onnetlisten(onlistening)
Start listening for when TCP servers start listening.
The returned event emitter emits
listening when that happens
with the address object for the tcp server that started listening.
To stop the listener do
Credit to @andreasmadsen for writing most of this module and being an async_hooks wizard
This project was kindly sponsored by nearForm.