js 实现浏览器的全屏和退出全屏

对于更多日常应用的公共类的操作方法，能够关注下小滑轮网站 http://www.feiaci.com/#/self/…

    /**
     * 全屏
    */
    let toFullScreen = () => {
        let el = document.documentElement;
        let rfs = el.requestFullScreen || el.webkitRequestFullScreen || el.mozRequestFullScreen || el.msRequestFullScreen;

        //typeof rfs != "undefined" && rfs
        if (rfs) {rfs.call(el);
        } else if (typeof window.ActiveXObject !== "undefined") {
            //for IE，这里其实就是模仿了按下键盘的 F11，使浏览器全屏
            let wscript = new ActiveXObject("WScript.Shell");
            if (wscript != null) {wscript.SendKeys("{F11}");
            }
        } else {alert("浏览器不反对全屏");
        }
    }

    /**
     * 退出全屏
    */
    let exitFullscreen = function () {
        let el = parent.document;
        let cfs = el.cancelFullScreen || el.webkitCancelFullScreen || el.mozCancelFullScreen || el.exitFullScreen;

        //typeof cfs != "undefined" && cfs
        if (cfs) {cfs.call(el);
        } else if (typeof window.ActiveXObject !== "undefined") {
            //for IE，这里和 fullScreen 雷同，模仿按下 F11 键退出全屏
            let wscript = new ActiveXObject("WScript.Shell");
            if (wscript != null) {wscript.SendKeys("{F11}");
            }
        } else {alert("切换失败, 可尝试 Esc 退出")
        }
    }