Strategies for handling asynchronous information
We manage data asynchronously in different forms, such as consuming data from a backend API, a typical operation in our daily development workflow, or reading contents from the local file system. We always consume data over HTTP, such as when authenticating users by sending credentials to an authentication service. We also use HTTP when fetching the latest posts in our favorite social network application.
Modern mobile devices have introduced a unique way of consuming remote services. They defer requests and response consumption until mobile connectivity is available. Responsivity and availability have become a big deal.
Although internet connections are high-speed nowadays, response time is always involved when serving such information. Thus, as we will see in this section, we put in place mechanisms to handle the state of our applications transparently for the end user.
Shifting from callback hell to promises
Sometimes...
