Event listener HTML element generated after iframe load

Yes, the fullscreen element’s ID is “fullscreen”. This element’s inside the parent HTML containing the iframe for my app

I need puzzle variables’ values to be changed before app loads whenever parent html’s element with fullscreen event listener/function is clicked on, and back to original after fullscreen is exited before app loads.

So how do I change puzzles’ variable values before app loads via parent html’s element with fullscreen event , and back to default after fullscreen is exited before app loads?

• This reply was modified 1 hour, 27 minutes ago by c4cc.
• This reply was modified 1 hour, 27 minutes ago by c4cc.