Node.js Design Patterns - Fourth Edition

5

Asynchronous Control Flow Patterns with Promises and Async/Await

Callbacks are the low-level building blocks of asynchronous programming in Node.js and, as such, they are one of the most important concepts that we need to master, but they are far from being developer-friendly. No wonder that, in the last chapter, we spent a significant amount of time learning various techniques to enforce callback discipline and keep our code manageable. We also learned about different control flow constructs using callbacks, and we have to acknowledge that they can be complex and verbose to the point that we needed to create higher-level abstractions to keep this complexity under control and to simplify the reuse of these patterns. A particular mention goes ...