Execute java script in action listener before action

Question

Hi, I have af:commandButton on my page , in its actionListener method I call java script
which displays af:popup with two buttons, I want to execute af:commandButton's action method with some program logic in depend of which button in the af:popup is clicked. The problem is that action method is execute before my java script to show the af:popup.

Answer 1

Hi,
the reason is that the JavaScript that you execute from the ActionListener is not executed before the page (or page section) is rendered, which is in the lifecycle is then after the action method is invoked.
However, I am observing on this forum that users think of JavaScript as a silver bullet, whereas it should really be seen as second choice only. If you want to execute logic in respect to which button a user clicks, then the code should be assigned to the button and not handled by some JavaScript. If - in combination with popups - you need to use JavaScript, then have a look at using the client listener for this (af:clientListener). Idealy you use the server side af:showPopupBehavior.
As a rule of thumb: always try to go with best practices and not with the easy catch
Frank