However, JavaScript developers ... use callbacks take a function as a parameter, which will be called once the work completes. If you’ve ever used something like setTimeout in the browser ...

Developers use JavaScript promises to model asynchronous operations in web and server-side programs. Here's a quick look at five ways to use promises in your code. Promises are a central mechanism ...

BR><BR>Now I know this is relatively simple using a setTimeout and perhaps a global variable etc. but I just can't get my head around the logic...<BR><BR>Thanks ...