Detect Browser & OS

Detect Browser & OS.js

var e = {
    ie: function() {
        return e._populate() || this._ie;
    },
    ie64: function() {
        return e.ie() && this._win64;
    },
    firefox: function() {
        return e._populate() || this._firefox;
    },
    opera: function() {
        return e._populate() || this._opera;
    },
    safari: function() {
        return e._populate() || this._safari;
    },
    chrome: function() {
        return e._populate() || this._chrome;
    },
    windows: function() {
        return e._populate() || this._windows;
    },
    osx: function() {
        return e._populate() || this._osx;
    },
    linux: function() {
        return e._populate() || this._linux;
    },
    iphone: function() {
        return e._populate() || this._iphone;
    },
    _populated: false,
    _populate: function() {
        if (e._populated) return;
        e._populated = true;
        var i = navigator.userAgent;
        var f = /(?:MSIE.(\d+\.\d+))|(?:(?:Firefox|GranParadiso|Iceweasel).(\d+\.\d+))|(?:Opera(?:.+Version.|.)(\d+\.\d+))|(?:AppleWebKit.(\d+(?:\.\d+)?))/.exec(i);
        var h = /(Mac OS X)|(Windows)|(Linux)/.exec(i);
        var g = /\b(iPhone|iP[ao]d)/.exec(i);
        e._win64 = !!(/Win64/.exec(i));
        if (f) {
            e._ie = f[1] ? parseFloat(f[1]) : NaN;
            if (e._ie && document.documentMode) e._ie = document.documentMode;
            e._firefox = f[2] ? parseFloat(f[2]) : NaN;
            e._opera = f[3] ? parseFloat(f[3]) : NaN;
            e._safari = f[4] ? parseFloat(f[4]) : NaN;
            if (e._safari) {
                f = /(?:Chrome\/(\d+\.\d+))/.exec(i);
                e._chrome = f && f[1] ? parseFloat(f[1]) : NaN;
            } else e._chrome = NaN;
        } else e._ie = e._firefox = e._opera = e._chrome = e._safari = NaN;
        if (h) {
            if (h[1]) {
                var j = /(?:Mac OS X (\d+(?:[._]\d+)?))/.exec(i);
                e._osx = j ? parseFloat(j[1].replace('_', '.')) : true;
            } else e._osx = false;
            e._windows = !!h[2];
            e._linux = !!h[3];
        } else e._osx = e._windows = e._linux = false;
        e._iphone = g;
    }
};