Clean Code in JavaScript

Event subscribing/emitting

JavaScript is a language that feels right at home when subscribing to and emitting Events. Events are incredibly common in most JavaScript programs, whether dealing with user-derived Events within the browser or server-side Events in Node.js.

There are various names used for operations relating to Events in JavaScript, so it's useful to know all of these names upfront so we're not confused when encountering them. An event is an occurrence in time that will result in the invocation of any callbacks that have been subscribed for that Event. Subscribing to an Event has many names, which all effectively mean the same thing: subscribing, registering, listening, binding, and so on. When the Event occurs, the subscribed ...