NodeJs catch unhandled error happens in async methods

[Evgen]

Originally I would like to ask a question about how to create robuts web server based on Node.js. However, that could be a very large and ambiguous question. So I break it to small and concrete question or chanllenge that I am facing when creating a robuts web server.So, one of the chanllenge I am facing is how to catch all unhandled errors in Node.js? I want to do this becasue I do not want any unhandled error stops Node.js from running which results in web server down.The solution comes to mind is to put the server running code block in a try-catch block to catch all unhandled errors. however, this is not working if any error happens from an async method. For example my web server could look like below code:\[code\]var fs = require('fs');var http = require('http');try { // Here is my main web server, it could happen errors by adding // more and more modules and functionalities to my server. // I need to catch all unhandled errors to prevent server from crashing // So, I put my whole server running in a try-catch block, but any error from // an async method could not be caught! http.createServer(function(req, res) { throw Error("An unhandled error happens!"); }).listen(1234);}catch (e){ console.log("An unhandled error caught!")}console.log('Server is listening to port 1234');\[/code\]So, am I on the correct direction of error handling to make sure server no stopping? or there is some other mechanism to make server recover from an error?