What does WaitForAjax() do?

[Silvio]

Hi,

Can you tell me what is the difference between the Method WaitForAjax() and this snippet:

browser.Manager.Wait.For (c =>
       browser.Actions.InvokeScript<bool> ("Sys.WebForms.PageRequestManager.getInstance().get_isInAsyncPostBack()") == false, false, timeout);

I always thought that WaitForAjax() should do the same, but there are situations where it doesn´t wait (long enough) but this snippet does.

Kind regards
Silvio

[Konstantin Petkov]

Hello Silvio,

You are absolutely correct - the WaitForAjax method executes pretty much the same script. There are only two differences:

1. WaitForAjax() will not throw JS error ('Sys' is undefined) in case of non-MS Ajax page.
2. WaitForAjax() also detect the jQuery AJAX requests.

My only guess is the page under test isn't consistent in the AJAX post backs, thus the behavior you notice.

Regards,
Konstantin Petkov
the Telerik team

[Silvio]

Thanks for your answer!

Kind regards