What are higher-order functions and how do callbacks relate to them?

May 29, 2024 ... Let's take a look at some fundamental patterns, and learn how we can write resource-efficient, non-blocking code, with the built-in solutions of Node.js. The fail callback takes either a string or a JavaScript Error type. The done callback takes an argument specific to each function. Most functions (create, reply ... A callback function is a function passed as an argument to another function and is invoked after some kind of event or completion of a task. Mar 4, 2023 ...