in ui/js/core.js [93:103]
Metis.toggleFullScreen = function () {
if (window.screenfull !== undefined && screenfull.enabled) {
$('#toggleFullScreen').on(Metis.buttonPressedEvent, function (e) {
screenfull.toggle(window.document[0]);
$('body').toggleClass('fullScreen');
e.preventDefault();
});
} else {
$('#toggleFullScreen').addClass('hidden');
}
};