Vue Js Detect Window Version

<html>
<head>
    <script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script>
</head>
<body>
    <div id="app">
        <h3>Vue js Get Operating System Version </h3>
        Operating System: {{ os }}
    </div>
    <script type="module">
        const app = new Vue({
            el: "#app",
            computed: {
                os() {
                    if (typeof navigator === "undefined") {
                        return "Unknown OS (no navigator object)";
                    }

let userAgent = navigator.userAgent;

if (userAgent.indexOf("Windows") !== -1) {
                        return this.getWindowsOS(userAgent);
                    } else if (userAgent.indexOf("Macintosh") !== -1) {
                        return "Mac OS X";
                    } else if (userAgent.indexOf("Linux") !== -1) {
                        return "Linux";
                    } else if (userAgent.indexOf("iPhone") !== -1) {
                        return "iPhone OS";
                    } else if (userAgent.indexOf("iPad") !== -1) {
                        return "iPad OS";
                    } else if (userAgent.indexOf("Android") !== -1) {
                        return "Android OS";
                    } else {
                        return "Unknown OS";
                    }
                },
            },
            methods: {
                getWindowsOS(userAgent) {
                    if (userAgent.indexOf("Windows NT 10.") !== -1) {
                        return "Windows 10";
                    } else if (userAgent.indexOf("Windows NT 6.3") !== -1) {
                        return "Windows 8.1";
                    } else if (userAgent.indexOf("Windows NT 6.2") !== -1) {
                        return "Windows 8";
                    } else if (userAgent.indexOf("Windows NT 6.1") !== -1) {
                        return "Windows 7";
                    } else if (userAgent.indexOf("Windows NT 6.0") !== -1) {
                        return "Windows Vista";
                    } else if (userAgent.indexOf("Windows NT 5.2") !== -1) {
                        return "Windows Server 2003; Windows XP x64 Edition";
                    } else if (userAgent.indexOf("Windows NT 5.1") !== -1) {
                        return "Windows XP";
                    } else if (userAgent.indexOf("Windows NT 5.01") !== -1) {
                        return "Windows 2000, Service Pack 1 (SP1)";
                    } else if (userAgent.indexOf("Windows NT 5.0") !== -1) {
                        return "Windows 2000";
                    } else if (userAgent.indexOf("Windows NT 4.0") !== -1) {
                        return "Windows NT 4.0";
                    } else if (userAgent.indexOf("Windows 98; Win 9x 4.90") !== -1) {
                        return "Windows Millennium Edition (Windows Me)";
                    } else if (userAgent.indexOf("Windows 98") !== -1) {
                        return "Windows 98";
                    } else if (userAgent.indexOf("Windows 95") !== -1) {
                        return "Windows 95";
                    } else if (userAgent.indexOf("Windows CE") !== -1) {
                        return "Windows CE";
                    } else {
                        return "Unknown Windows version";
                    }
                },
            },

});
    </script>
</body>
</html>