javascript browser detect

HTML

<div id="example"></div>

JavaScript

//txt = "<p>Browser CodeName: " + navigator.appCodeName + "</p>";
//txt+= "<p>Browser Name: " + navigator.appName + "</p>";
//txt+= "<p>Browser Version: " + navigator.appVersion + "</p>";
//txt+= "<p>Cookies Enabled: " + navigator.cookieEnabled + "</p>";
//txt+= "<p>Platform: " + navigator.platform + "</p>";
//txt+= "<p>User-agent header: " + navigator.userAgent + "</p>";
 
//document.getElementById("example").innerHTML=txt;


//var detect = navigator.language;
//console.log(detect);

var userLang = window.navigator.userLanguage || window.navigator.language; 
console.log (userLang);