js 不显示地址栏

function requestFullScreen() {
  var element = document.documentElement;
  if (element.requestFullscreen) {
    element.requestFullscreen();
  } else if (element.mozRequestFullScreen) { // Firefox
    element.mozRequestFullScreen();
  } else if (element.webkitRequestFullscreen) { // Chrome, Safari and Opera
    element.webkitRequestFullscreen();
  } else if (element.msRequestFullscreen) { // IE/Edge
    element.msRequestFullscreen();
  }
}

// 调用函数进入全屏
requestFullScreen();

<meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no">

function exitFullScreen() {
  if (document.exitFullscreen) {
    document.exitFullscreen();
  } else if (document.mozCancelFullScreen) { // Firefox
    document.mozCancelFullScreen();
  } else if (document.webkitExitFullscreen) { // Chrome, Safari and Opera
    document.webkitExitFullscreen();
  } else if (document.msExitFullscreen) { // IE/Edge
    document.msExitFullscreen();
  }
}

// 绑定到按钮点击事件
document.getElementById('exitFullScreenButton').addEventListener('click', exitFullScreen);