Resolving errors in asynchronous code

There are several ways to handle errors in your asynchronous code. In this recipe, you will see a few examples of dealing with errors, both using the then() callback and the async/await pattern.

Getting ready

In order to follow along with this recipe:

• If you followed along with any of the previous recipes in this chapter, you'll only need to edit the existing project. Otherwise, create a new app with the starting code available at https://github.com/PacktPublishing/Flutter-Cookbook/tree/master/chapter_07.

How to do it...

We are going to divide this section into two sub-sections. In the first section, we will deal with the errors by using the then() callback function and in the second section, we will deal with those errors using the async/await pattern.

Dealing with errors using the then() callback:

The most obvious way to catch errors in a then() callback is using the catchError callback. To do so, follow these steps:

• Add the following...