Working with fullscreen

fullscreen.js

var body = document.body;

if (body.requestFullScreen) {
  body.requestFullScreen();
} else if (body.mozRequestFullScreen) {
  body.mozRequestFullScreen();
} else if (body.webkitRequestFullScreen) {
  body.webkitRequestFullScreen();
}

if (document.cancelFullScreen) {
  document.cancelFullScreen();
} else if (document.mozCancelFullScreen) {
  document.mozCancelFullScreen();
} else if (document.webkitCancelFullScreen) {
  document.webkitCancelFullScreen();
}

$(document).on("fullscreenchange", callback);
$(document).on("webkitfullscreenchange", callback);
$(document).on("mozfullscreenchange", callback);