a4j:commandLink onclick return value affects behaviour

[mkuehle]

Hi,

it seems that the return value of any javascript function which is called in onclick attribute of a4j:commandLink does stop the ajax call.

In my case i need a user confirmation if user clicks on an a4j:commandLink. If the user cancel the confirmation the ajax call shouldn't be performed. If the user pushes 'OK' the confirmation dialog returns true and the a4j:commandLink should perfom the ajax call but it doesn't.

The following code

<a4j:commandLink action="#{MyBB.doit}" reRender="myComp" onclick="return confirm('Confirm it');">Delete Entry</a4j:commandLink>

It doesn't matter wich case the confirmation returns ('OK' -> true or 'Cancel' -> false) the a4j:commandLink doesn't perform the ajax call.

But also if onclick="return true;" is set the ajax call wouldn't be perfomed.

I would expect that 'return true' will perform the normal behaviour. My question is: how can i implement a user confirmation for this component?

In this example the ajax call to delete an entry should only be performed if the user will confirm this action.
Thanks for any suggestions.

[mkuehle]

I found the answer to solve this problem.

The answer ist not to return a return value if the confirmation returned true. Because if the custom javascript in onclick attribute returns a value the following javascript which is added automatically by ajax4jsf framework to submit the form wouldn't be executed (as normal behaviour if there is a return statement... ;).

So if i change the onclick javascript to the following it works like i expect it.

<a4j:commandLink action="#{MyBB.doit}" reRender="myComp" onclick="if(!confirm('Confirm it')){return false;}">Delete Entry</a4j:commandLink>

I found this solution through the "Custom Java Script together with Ajax4jsf" Example (http://livedemo.exadel.com/a4j-jsEvents/).

Maybe someone needs this information...

[sergeysmirnov]

Yes, you are right here. Actually, I answered a similar question in another thread, but missed your question. Sorry. I was very simple to answer.