H5跳转应用市场

<script type="text/javascript">
    //检查是否是浏览器环境
    function checkBrowerType() {
        return navigator.userAgent.toLowerCase().indexOf('micromessenger') !== -1;
    }
    //检查手机系统是安卓还是IOS
    function checkSysType() {
        let u = navigator.userAgent;
        if (u.indexOf('Android') > -1 || u.indexOf('Linux') > -1) {
            return 'Android';
        }
        if (!!u.match(/\(i[^;]+;( U;)? CPU.+Mac OS X/)) {
            return 'IOS';
        }
    }
    function download() {
        if (checkBrowerType()) {
            alert('请在浏览器上打开')
        } else {
            //android端
            if (checkSysType() === 'Android') {
                //跳转安卓应用市场
                window.location.href = "market://details?id=应用包名";
            }
            //ios端
            if (checkSysType() === 'IOS') {
                //跳转IOS应用市场
                window.location.href = "https://itunes.apple.com/cn/app/idxxxxxxxxxx";
            }
        }
    }
</script>