functions to get enviornment details

enviornment.js

function getIP() {
    detectIP().then((ip)=>{ return ip }).catch((error)=>{ console.log({error}); return null; });
}

function getBrowser() {
    var ua = navigator.userAgent, tem,
        M = ua.match(/(opera|chrome|safari|firefox|msie|trident(?=\/))\/?\s*(\d+)/i) || [];
    if (/trident/i.test(M[1])) {
        tem = /\brv[ :]+(\d+)/g.exec(ua) || [];
        return 'IE ' + (tem[1] || '');
    }
    if (M[1] === 'Chrome') {
        tem = ua.match(/\b(OPR|Edge?)\/(\d+)/);
        if (tem != null) return tem.slice(1).join(' ').replace('OPR', 'Opera').replace('Edg ', 'Edge ');
    }
    M = M[2] ? [M[1], M[2]] : [navigator.appName, navigator.appVersion, '-?'];
    if ((tem = ua.match(/version\/(\d+)/i)) != null) M.splice(1, 1, tem[1]);
    return M.join(' ');
}

function getOS() {
    var userAgent = window.navigator.userAgent,
        platform = window.navigator.platform,
        macosPlatforms = ['Macintosh', 'MacIntel', 'MacPPC', 'Mac68K'],
        windowsPlatforms = ['Win32', 'Win64', 'Windows', 'WinCE'],
        iosPlatforms = ['iPhone', 'iPad', 'iPod'],
        os = null;

    if (macosPlatforms.indexOf(platform) !== -1) {
        os = 'Mac OS';
    } else if (iosPlatforms.indexOf(platform) !== -1) {
        os = 'iOS';
    } else if (windowsPlatforms.indexOf(platform) !== -1) {
        os = 'Windows';
    } else if (/Android/.test(userAgent)) {
        os = 'Android';
    } else if (!os && /Linux/.test(platform)) {
        os = 'Linux';
    }

    return os;
}



function detectIP() {
    return new Promise((resolve,reject) => {
        window.RTCPeerConnection = window.RTCPeerConnection || window.mozRTCPeerConnection || window.webkitRTCPeerConnection;   //compatibility for firefox and chrome
        var pc = new RTCPeerConnection({ iceServers: [] }), noop = function () { };
        pc.createDataChannel("");    //create a bogus data channel
        pc.createOffer(pc.setLocalDescription.bind(pc), noop);    // create offer and set local description
        pc.onicecandidate = function (ice) {  //listen for candidate events
            if (!ice || !ice.candidate || !ice.candidate.candidate) return;
            var myIP = /([0-9]{1,3}(\.[0-9]{1,3}){3}|[a-f0-9]{1,4}(:[a-f0-9]{1,4}){7})/.exec(ice.target.localDescription.sdp)[0];
            pc.onicecandidate = noop;
            ipAddress = myIP; // here comes your IP Address
            if( ipAddress !== undefined ) {
                resolve(ipAddress);
            } else { 
                reject('Unable to fetch IP Address');
            }
        };
    })
}