Asynchronous programming in JavaScript leverages features like callbacks, promises and async/await to sidestep this issue by allowing other code to run in the meantime.

To start, we’ll lay out a simple JavaScript program using promises, then we’ll refactor it to use async and await. In our example, we’ll use axios, a promise-based HTTP library.

This article introduces the three ways to handle asynchronous behavior in JavaScript. We’ll start with a look at callbacks, then I’ll introduce promises and the async and await keywords as ...