Learning Node.js Development

An async program example

So far we haven't used Node APIs, the Callback Queue, or the Event Loop. The next example will use all four (Call Stack, the Node APIs, the Callback Queue, and the Event Loop). As shown on the left-hand side of the following screenshot, we have our async example, exactly the same as we wrote it in the last section:

In this example, we will be using the Call Stack, the Node APIs, the Callback Queue, and the Event Loop. All four of these are going to come into play for our asynchronous program. Now things are going to start off as you might expect. The first thing that happens is we run the main function by adding it ...