Traditional error-handling mechanisms like try/catch blocks often fall short because they do not naturally capture errors from asynchronous callbacks or promises.

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.

At the heart of JavaScript’s asynchronous connection-handling are “promises,” which provide a new way of scheduling how your code will work with JavaScript APIs and functions.