BriskBard, CEF4Delphi, WebView4Delphi, WebUI4Delphi and WebUI4CSharp

Hi @salvador, great project again

On a Delphi or Lazarus project and I'm trying to catch the web_exit event when the user closes the WebUI window via the system menu (close button in the window's title bar).

Catching web_exit through a button in the JS interface works perfectly, but when the close button in the system menu is used, the event isn't triggered. I mean, If we take the sample `call_js_from_delphi`, clickng on the "Exit" html button the main form close, but closing it from system menu, the main form won't close;

How I can detect this system menu "Close" action from main Form and handle the event properly without messing process tricks?

Any advice or code snippets would be greatly appreciated

Try using IWebUIWindow.BindAllEvents and then check aEvent.EventType to see if it has the WEBUI_EVENT_DISCONNECTED value.
https://github.com/salvadordf/WebUI4Delphi/blob/348183ef5258caace9d248970ce4c060202f45ed/demos/Delphi_VCL/public_network_access/uMainForm.pas#L72

If that doesn't work try using the Window.beforeunload event in JavaScript to call the same function as the "Exit" button.

Thanks for the suggestions but I can't get it.
I log all events, I've set some others html events as well and nothing happen. The only event catched is the WEBUI_EVENT_DISCONNECTED but I think it's reliable as if you use a second window then the event is sent when closing this window, maybe I have to go deeper checking if there is some handle id attached that I could filter for not closing the app if the event isn't triggered from the main webui window.

I will post an issue on the offical repo and will report here.