Loss of iframe input focus, how to return?

Question

JavaScript

Hello,
The problem only occurs on ios 9, Safari.
The page (html5-game) is placed in an iframe, after showing an advertisement, the iframe with the game loses input focus and does not respond to any clicks. How can I force input focus back?
window.focus() or document.getElementById('gameContainer').focus(); ?
gameContainer is the div where the game canvas is created.
Will it work, and on which element should the focus() method be called? window, gameContainer or canvas with a game?
PS I wouldn't ask the question if it was possible to test all these options, but I can only solve problems "blindly", since the problem occurs only on the customer's server.

Answer 1

Remove ads in IOS9, or to the ad support.