js实现浏览器f11效果

function toggleFullScreen() {
  var elem = document.documentElement; // 获取文档的根元素
  if (!document.fullscreenElement) { // 判断是否已经是全屏模式
    if (elem.requestFullscreen) {
      elem.requestFullscreen();
    } else if (elem.mozRequestFullScreen) { // Firefox
      elem.mozRequestFullScreen();
    } else if (elem.webkitRequestFullscreen) { // Chrome, Safari and Opera
      elem.webkitRequestFullscreen();
    } else if (elem.msRequestFullscreen) { // IE/Edge
      elem.msRequestFullscreen();
    }
  } else {
    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();
    }
  }
}

// 绑定到按钮或其他元素上
document.getElementById('fullscreen-button').addEventListener('click', toggleFullScreen);