Using Promise.all to collect an array of async results

In the previous recipe, we saw how to trigger multiple asynchronous functions before awaiting their results. We've also seen how well the Promise API and asyc/await operators work together. There are some situations where it is preferable to use the Promise API.

In this recipe, we'll see how to use Promise.all to collect the result of multiple asynchronous operations.

Getting ready

This recipe assumes you already have a workspace that allows you to create and run ES modules in your browser. If you don't, please see the first two chapters.

How to do it...

1. Open your command-line application and navigate to your workspace.
2. Create a new folder named 04-06-Promise-all-collect-concurrently.
3. Create three functions, checkEngines, checkFlightPlan, and checkNavigationSystem that log a message when they start and return a Promise that resolves to true if a random number is higher than a threshold after some timeout:

function checkEngines() { 
  console...