js实现f11功能

// 进入全屏模式
function enterFullScreen() {
    var elem = document.documentElement;
    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();
    }
}

// 退出全屏模式
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('fullscreen-button').addEventListener('click', enterFullScreen);
document.getElementById('exit-fullscreen-button').addEventListener('click', exitFullScreen);