Most API calls are asynchronous, meaning that when you call an API, you provide a callback so when the routine is done, it will call your code to continue processing.

While you might be familiar with APIs, we'll get into how they work and how they can be used in this tech project, using low-code programming to check the weather with your home lab.

Node.js offers speed and a nonblocking I/O API. Node.js was created because concurrency is difficult in many server-side programming languages, and often leads to poor performance.