Loading screen (CustomWebview)

Hi, I'm new to this. I am trying to ensure that while there is no Internet connection the app continues to show the loading menu until the Internet is available and the website is fully loaded. In short, the loading screen will continue until the internet is available and the website is loaded. But I can't do it HELP
prueba.aia (77.8 KB)

If the website is yours i belive you can easily add code to do that with javascript on the server side.