Browser Detection Script

Browser Detection Script

<script>
        var browser = function() {
            // Return cached result if avalible, else get result then cache it.
            if (browser.prototype._cachedResult)
                return browser.prototype._cachedResult;

                // Opera 8.0+
                var isOpera = (!!window.opr && !!opr.addons) || !!window.opera || navigator.userAgent.indexOf(' OPR/') >= 0;

                // Firefox 1.0+
                var isFirefox = typeof InstallTrigger !== 'undefined';

                // Safari 3.0+ "[object HTMLElementConstructor]"
                var isSafari = /constructor/i.test(window.HTMLElement) || (function (p) { return p.toString() === "[object SafariRemoteNotification]"; })(!window['safari'] || safari.pushNotification);

                // Internet Explorer 6-11
                var isIE = /*cc_on!*/false || !!document.documentMode;

                // Edge 20+
                var isEdge = !isIE && !!window.StyleMedia;

                // Chrome 1+
                var isChrome = !!window.chrome && !!window.chrome.webstore;

                // Blink engine detection
                var isBlink = (isChrome || isOpera) && !!window.CSS;

                return browser.prototype._cachedResult =
                    isOpera ? 'Opera' :
                    isFirefox ? 'Firefox' :
                    isSafari ? 'Safari' :
                    isChrome ? 'Chrome' :
                    isIE ? 'IE' :
                    isEdge ? 'Edge' :
                    isBlink ? 'Blink' :
                    "Don't know";
        };

        console.log(browser());

    </script>