[prodigal_erik]

This isn't stuff every programmer should know, it only concerns people who are trying to write complex non-blocking Javascript without async/await (which are already implemented in Babel and proposed for ES7). It also focuses on Node-only idioms which IMHO should be deprecated in favor of ES6 Promises (which Node's LTS release supports natively!)

[Illniyar]

The title of the post is just "error handling in node.js".

Probably should change the submission title.

[logicallee]

if you're not writing complex non-blocking Javascript in 2016, what are you even doing with your life? /s