Nodejs / Express - Launching my app: express.createServer() is deprecated

Question

I downloaded a node app to test and play around with. I have googled around and found that Express is found to be a little outdated. Can someone help me to fix the implement

Answer 1

var express = require('express');
var app = express();
app.listen(your_port_number);

With the newer release of express (express 4.x), you do not need to create server. app.listen internally does that. Refer https://expressjs.com/en/4x/api.html#app.listen