Thank you very much for the detailed answers.
I wanted to use it to display a message on an iframe that you need an internet connection and it set visibility to the loading animation to invisible. Right now if you are offline iframe shows an error with black text on black background and the loafing anim is showing forever.
And to change a svg icon if online/offline which displays server status.
Some actions / expressions for iframe would be handy. Like a trigger when loading is complete, or a way to get what URL or code is shown in the iframe. Ashley
Or a loading progress to show a timeout message after x sec.