How {async:false} works in jQuery AJAX request?

Question

I know why and how to use {async:false} in jQuery AJAX request.

But what I need is how this works synchronously? What is the magic behind this?

Answer 1

My best guess, is that when async is false, then it will wait until the readyState is set to DONE, which as defined by the W3, is:

The data transfer has been completed or something went wrong during the transfer (e.g. infinite redirects).

So basically when the request is completed, it will continue on.