Async JavaScript

Types of Async Functions

Each JavaScript environment comes with its own set of async functions. Some, like setTimeout and setInterval, are ubiquitous. Others are unique to certain browsers or server-side frameworks. The async functions provided by the JavaScript environment generally fall into two categories: I/O and timing. These are the basic building blocks that you’ll use to define complex async behaviors in your applications.

I/O Functions

Node.js wasn’t created so that people could run JavaScript on the server. It was created because Ryan Dahl wanted an event-driven server framework built on a high-level language. JavaScript just happened to be the right language for the job. Why? Because the language is a perfect fit for nonblocking ...