bigbluebutton-Github/bigbluebutton-html5/imports/ui/components/nav-bar/settings-dropdown/service.js

toggleFullScreen = () => {
  let element = document.documentElement;

  if (document.fullscreenElement
    || document.webkitFullscreenElement
    || document.mozFullScreenElement
    || document.msFullscreenElement) {

    if (document.exitFullscreen) {
      document.exitFullscreen();
    } else if (document.mozCancelFullScreen) {
      document.mozCancelFullScreen();
    } else if (document.webkitExitFullscreen) {
      document.webkitExitFullscreen();
    }

    // If the page is not currently fullscreen, make fullscreen
  } else {
    if (element.requestFullscreen) {
      element.requestFullscreen();
    } else if (element.mozRequestFullScreen) {
      element.mozRequestFullScreen();
    } else if (element.webkitRequestFullscreen) {
      element.webkitRequestFullscreen();
      element.webkitRequestFullScreen(Element.ALLOW_KEYBOARD_INPUT);
    } else if (element.msRequestFullscreen) {
      element.msRequestFullscreen();
    }
  }
};

export {
  toggleFullScreen,
};