Not working with below code: ``` @PWA(name = "App", shortName = "App", ena

Directory Idle Notification
1

Not working with below code:

@PWA(name = "App", shortName = "App", enableInstallPrompt = false)
@Theme(themeFolder = "app")
@CssImport(value = "./styles/example.css", themeFor = "vaadin-grid")
@PreserveOnRefresh
@Push
public class MainView extends AppLayout implements AfterNavigationObserver {

    public MainView() {
         ...
         
         IdleNotification idleNotification = new IdleNotification();
         idleNotification.setSecondsBeforeNotification(90);
         idleNotification.setMessage("Your session will expire in " +  
                                   IdleNotification.MessageFormatting.SECS_TO_TIMEOUT  
         + " seconds.");
         idleNotification.addExtendSessionButton("Extend session");
         idleNotification.addRedirectButton("Logout now", "logout");
         idleNotification.addCloseButton();
         idleNotification.setExtendSessionOnOutsideClick(false);

         UI.getCurrent().add(idleNotification);
    }
}

Unfortunatelly notification not showing. I also tried set parameters in application.properties as:

vaadin.closeIdleSessions=false
vaadin.heartbeatInterval=true
vaadin.pushMode=true

but that does not solve the problem.

Can anyone help?