[Pas2js] JS Sync/Async Limitations

[Michael Van Canneyt]

On Thu, 21 Feb 2019, Sergei Vertiev wrote:

> Hello, Mattias, thanks to you...
>
>>> I started a page for Delphians porting code to
>>> pas2js. Feel free to improve it:
>
> I read  "Asynchronous vs Waiting" article.
> This is short, but significant and true.
>
> But seems, there are no ways to overcame this "Async/vs Waiting" obstacle.
> I've tried seemed everything, before realize that ALL Async stuff starts to
> processing only AFTER we leave our (syncronious) function.

Yes.

>
> This means that we simply unable to implement some functionality in JS,
> which goes from Pas code.

Correct. It is pointless to try.

>
> Still sync operations and UI callbacks as Events works fine
> and this is quite enough for certain types of tasks.

Yes, correct. 
Basically the browser is oriented on the user experience, which means: no wait cursor...

Michael.