js实现键盘f11按下事件

document.addEventListener('keydown', function(event) {
    if (event.key === 'F11') {
        event.preventDefault(); // 阻止默认行为，例如浏览器全屏
        console.log('F11键被按下');
        // 在这里添加你希望执行的代码
        toggleFullScreen();
    }
});

function toggleFullScreen() {
    var elem = document.documentElement;
    if (!document.fullscreenElement && !document.mozFullScreenElement && !document.webkitFullscreenElement && !document.msFullscreenElement) {
        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();
        }
    }
}