Bagaimana untuk mencari butiran sistem pengendalian menggunakan JavaScript?

JavaScript menyediakan pelbagai kaedah untuk mengakses maklumat tentang sistem pengendalian pengguna. Berikut ialah skrip komprehensif yang membolehkan anda mendapatkan maklumat terperinci tentang nama dan versi OS:

/**
 * JavaScript Client Detection
 * (C) viazenetti GmbH (Christian Ludwig)
 */
(function (window) {
    {
        var unknown = '-';

        // screen
        var screenSize = '';
        if (screen.width) {
            width = (screen.width) ? screen.width : '';
            height = (screen.height) ? screen.height : '';
            screenSize += '' + width + " x " + height;
        }

        // browser
        var nVer = navigator.appVersion;
        var nAgt = navigator.userAgent;
        var browser = navigator.appName;
        var version = '' + parseFloat(nVer);
        var nameOffset, verOffset, ix;

        // Yandex Browser
        if ((verOffset = nAgt.indexOf('YaBrowser')) != -1) {
            browser = 'Yandex';
            version = nAgt.substring(verOffset + 10);
        }
        // Samsung Browser
        else if ((verOffset = nAgt.indexOf('SamsungBrowser')) != -1) {
            browser = 'Samsung';
            version = nAgt.substring(verOffset + 15);
        }
        // UC Browser
        else if ((verOffset = nAgt.indexOf('UCBrowser')) != -1) {
            browser = 'UC Browser';
            version = nAgt.substring(verOffset + 10);
        }
        // Opera Next
        else if ((verOffset = nAgt.indexOf('OPR')) != -1) {
            browser = 'Opera';
            version = nAgt.substring(verOffset + 4);
        }
        // Opera
        else if ((verOffset = nAgt.indexOf('Opera')) != -1) {
            browser = 'Opera';
            version = nAgt.substring(verOffset + 6);
            if ((verOffset = nAgt.indexOf('Version')) != -1) {
                version = nAgt.substring(verOffset + 8);
            }
        }
        // Legacy Edge
        else if ((verOffset = nAgt.indexOf('Edge')) != -1) {
            browser = 'Microsoft Legacy Edge';
            version = nAgt.substring(verOffset + 5);
        }
        // Edge (Chromium)
        else if ((verOffset = nAgt.indexOf('Edg')) != -1) {
            browser = 'Microsoft Edge';
            version = nAgt.substring(verOffset + 4);
        }
        // MSIE
        else if ((verOffset = nAgt.indexOf('MSIE')) != -1) {
            browser = 'Microsoft Internet Explorer';
            version = nAgt.substring(verOffset + 5);
        }
        // Chrome
        else if ((verOffset = nAgt.indexOf('Chrome')) != -1) {
            browser = 'Chrome';
            version = nAgt.substring(verOffset + 7);
        }
        // Safari
        else if ((verOffset = nAgt.indexOf('Safari')) != -1) {
            browser = 'Safari';
            version = nAgt.substring(verOffset + 7);
            if ((verOffset = nAgt.indexOf('Version')) != -1) {
                version = nAgt.substring(verOffset + 8);
            }
        }
        // Firefox
        else if ((verOffset = nAgt.indexOf('Firefox')) != -1) {
            browser = 'Firefox';
            version = nAgt.substring(verOffset + 8);
        }
        // MSIE 11+
        else if (nAgt.indexOf('Trident/') != -1) {
            browser = 'Microsoft Internet Explorer';
            version = nAgt.substring(nAgt.indexOf('rv:') + 3);
        }
        // Other browsers
        else if ((nameOffset = nAgt.lastIndexOf(' ') + 1) < (verOffset = nAgt.lastIndexOf('/'))) {
            browser = nAgt.substring(nameOffset, verOffset);
            version = nAgt.substring(verOffset + 1);
            if (browser.toLowerCase() == browser.toUpperCase()) {
                browser = navigator.appName;
            }
        }
        // trim the version string
        if ((ix = version.indexOf(';')) != -1) version = version.substring(0, ix);
        if ((ix = version.indexOf(' ')) != -1) version = version.substring(0, ix);
        if ((ix = version.indexOf(')')) != -1) version = version.substring(0, ix);

        majorVersion = parseInt('' + version, 10);
        if (isNaN(majorVersion)) {
            version = '' + parseFloat(nVer);
            majorVersion = parseInt(nVer, 10);
        }

        // mobile version
        var mobile = /Mobile|mini|Fennec|Android|iP(ad|od|hone)/.test(nVer);

        // cookie
        var cookieEnabled = (navigator.cookieEnabled) ? true : false;

        if (typeof navigator.cookieEnabled == 'undefined' && !cookieEnabled) {
            document.cookie = 'testcookie';
            cookieEnabled = (document.cookie.indexOf('testcookie') != -1) ? true : false;
        }

        // system
        var os = unknown;
        var clientStrings = [
            { s: 'Windows 10', r: /(Windows 10\.0|Windows NT 10\.0)/ },
            { s: 'Windows 8.1', r: /(Windows 8\.1|Windows NT 6\.3)/ },
            { s: 'Windows 8', r: /(Windows 8|Windows NT 6\.2)/ },
            { s: 'Windows 7', r: /(Windows 7|Windows NT 6\.1)/ },
            { s: 'Windows Vista', r: /Windows NT 6\.0/ },
            { s: 'Windows Server 2003', r: /Windows NT 5\.2/ },
            { s: 'Windows XP', r: /(Windows NT 5\.1|Windows XP)/ },
            { s: 'Windows 2000', r: /(Windows NT 5\.0|Windows 2000)/ },
            { s: 'Windows ME', r: /(Win 9x 4\.90|Windows ME)/ },
            { s: 'Windows 98', r: /(Windows 98|Win98)/ },
            { s: 'Windows 95', r: /(Windows 95|Win95|Windows_95)/ },
            { s: 'Windows NT 4.0', r: /(Windows NT 4\.0|WinNT4\.0|WinNT|Windows NT)/ },
            { s: 'Windows CE', r: /Windows CE/ },
            { s: 'Windows 3.11', r: /Win16/ },
            { s: 'Android', r: /Android/ },
            { s: 'Open BSD', r: /OpenBSD/ },
            { s: 'Sun OS', r: /SunOS/ },
            { s: 'Chrome OS', r: /CrOS/ },
            { s: 'Linux', r: /(Linux|X11(?!.*CrOS))/ },
            { s: 'iOS', r: /(iPhone|iPad|iPod)/ },
            { s: 'Mac OS X', r: /Mac OS X/ },
            { s: 'Mac OS', r: /(Mac OS|MacPPC|MacIntel|Mac_PowerPC|Macintosh)/ },
            { s: 'QNX', r: /QNX/ },
            { s: 'UNIX', r: /UNIX/ },
            { s: 'BeOS', r: /BeOS/ },
            { s: 'OS/2', r: /OS\/2/ },
            { s: 'Search Bot', r: /(nuhk|Googlebot|Yammybot|Openbot|Slurp|MSNBot|Ask Jeeves\/Teoma|ia_archiver)/ }
        ];
        for (var id in clientStrings) {
            var cs = clientStrings[id];
            if (cs.r.test(nAgt)) {
                os = cs.s;
                break;
            }
        }

        var osVersion = unknown;

        if (/Windows/.test(os)) {
            osVersion = /Windows (.*)/.exec(os)[1];
            os = 'Windows';
        }

        switch (os) {
            case 'Mac OS':
            case 'Mac OS X':

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