Hi, I created a text field page item that, when changed, set a static value on another hidden page item:

After that, i created a button that, when clicked, has a DA that show an Alert, with the following client-side condition:

Whenever i clicked the button, the alert appears:


On another application with Apex 21.2.8, the button does not execute anything if i only but de client-side conditioned Alert. On console in debug mode not even the log of the DA execution is shown in that version.
What i am not understanding? I can't use &. in client-side conditions despite the help stating that i can?
Thanks.