“// ---------------------------
// Add the code - Check focus game (pause/play music)
// Adding a page visibility state handler
document.addEventListener (‘visibilitychange’, function () {
// If the page is hidden
if (document.visibilityState == ‘hidden’)
// Pause music playing on channel 1
game.getSoundManager().getMusicOnChannel(1).pause()
else
// In all other cases, we play music on 1 channel
game.getSoundManager().getMusicOnChannel(1).play();
});
// ---------------------------”