JS实现网页全屏与退出全屏

$('#alarm-fullscreen-toggler').on('click', function(e) {var element = document.documentElement;if (!$('body').hasClass("full-screen")) {$('body').addClass("full-screen");$('#alarm-fullscreen-toggler').addClass("active");if (element.requestFullscreen) {element.requestFullscreen();} else if (element.mozRequestFullScreen) {element.mozRequestFullScreen();} else if (element.webkitRequestFullscreen) {element.webkitRequestFullscreen();} else if (element.msRequestFullscreen) {element.msRequestFullscreen();}} else {$('body').removeClass("full-screen");$('#alarm-fullscreen-toggler').removeClass("active");if (document.exitFullscreen) {document.exitFullscreen();} else if (document.mozCancelFullScreen) {document.mozCancelFullScreen();} else if (document.webkitCancelFullScreen) {document.webkitCancelFullScreen();} else if (document.msExitFullscreen) {document.msExitFullscreen();}}});

全屏方法1：

var el = document.documentElement;
    var rfs = el.requestFullScreen || el.webkitRequestFullScreen || el.mozRequestFullScreen || el.msRequestFullScreen;
    if (typeof rfs != "undefined" && rfs) {
        rfs.call(el);
    } else if (typeof window.ActiveXObject != "undefined") {
        var wscript = new ActiveXObject("WScript.Shell");
        if (wscript != null) {
            wscript.SendKeys("{F11}");
        }
    }

全屏方法2：

var docElm = document.documentElement;
    //W3C  
    if (docElm.requestFullscreen) {
        docElm.requestFullscreen();
    }
        //FireFox  
    else if (docElm.mozRequestFullScreen) {
        docElm.mozRequestFullScreen();
    }
        //Chrome等  
    else if (docElm.webkitRequestFullScreen) {
        docElm.webkitRequestFullScreen();
    }
        //IE11
    else if (elem.msRequestFullscreen) {
        elem.msRequestFullscreen();
    }

退出全屏：

    if (document.exitFullscreen) {
        document.exitFullscreen();
    }
    else if (document.mozCancelFullScreen) {
        document.mozCancelFullScreen();
    }
    else if (document.webkitCancelFullScreen) {
        document.webkitCancelFullScreen();
    }
    else if (document.msExitFullscreen) {
        document.msExitFullscreen();
    }