var browser = {

        versions: function () {

            var u = navigator.userAgent,

                    app = navigator.appVersion;

            return {

                trident: u.indexOf('Trident') > -1, /*IE内核*/

                presto: u.indexOf('Presto') > -1, /*opera内核*/

                webKit: u.indexOf('AppleWebKit') > -1, /*苹果、谷歌内核*/

                gecko: u.indexOf('Gecko') > -1 && u.indexOf('KHTML') == -1, /*火狐内核*/

                mobile: !!u.match(/AppleWebKit.*Mobile.*/), /*是否为移动终端*/

                ios: !!u.match(/\(i[^;]+;( U;)? CPU.+Mac OS X/), /*ios终端*/

                android: u.indexOf('Android') > -1 || u.indexOf('Linux') > -1, /*android终端或者uc浏览器*/

                iPhone: u.indexOf('iPhone') > -1, /*是否为iPhone或者QQHD浏览器*/

                iPad: u.indexOf('iPad') > -1, /*是否iPad*/

                webApp: u.indexOf('Safari') == -1, /*是否web应该程序，没有头部与底部*/

                souyue: u.indexOf('souyue') > -1,

                superapp: u.indexOf('superapp') > -1,

                weixin: u.toLowerCase().indexOf('micromessenger') > -1,

                Safari: u.indexOf('Safari') > -1

            };

        }(),

        language: (navigator.browserLanguage || navigator.language).toLowerCase()

    };

    document.querySelector(".cyj-download-btn").onclick = function () {

        document.querySelector(".show-dialog").style.display = "block";

        setTimeout(function () {

            document.querySelector(".show-dialog").style.display = "none";

        },1000);

        if (browser.versions.ios) {

            window.location.href = "打开该App的连接://openApp";

            setTimeout(function () {

                window.location.href = "该App的连接地址;

                window.location.href = "该App的连接地址";

            }, 2000)

        } else if (browser.versions.android) {

            window.location.href = "打开该App的连接://openApp";

            setTimeout(function () {

                window.location.href = "该App的连接地址";

            }, 2000)

        }

    };

转自：链接：https://www.jianshu.com/p/48288466bdc2