Brim is the name given to a technique widely adopted by the web industry to workaround issues with Safari's address bar UI intruding into the screen during game play. It allows the user to swipe up to dismiss the browser UI and return the game to full screen.
The BBC now implements a platform-wide Brim solution, which lives on our CAGE environment. As a result, this starter pack no longer includes any code or examples relating to Brim. When your game is uploaded to the BBC environment Brim will automatically be applied on relevant devices.