How to detect my browser version and operating system using JavaScript?

Question

I have tried using the code below but it only display results in Chrome and Mozilla not working in IE6.

Answer 1

For Firefox, Chrome, Opera, Internet Explorer and Safari

var ua="Mozilla/1.22 (compatible; MSIE 10.0; Windows 3.1)";
//ua = navigator.userAgent;
var b;
var browser;
if(ua.indexOf("Opera")!=-1) {

    b=browser="Opera";
}
if(ua.indexOf("Firefox")!=-1 && ua.indexOf("Opera")==-1) {
    b=browser="Firefox";
    // Opera may also contains Firefox
}
if(ua.indexOf("Chrome")!=-1) {
    b=browser="Chrome";
}
if(ua.indexOf("Safari")!=-1 && ua.indexOf("Chrome")==-1) {
    b=browser="Safari";
    // Chrome always contains Safari
}

if(ua.indexOf("MSIE")!=-1 && (ua.indexOf("Opera")==-1 && ua.indexOf("Trident")==-1)) {
    b="MSIE";
    browser="Internet Explorer";
    //user agent with MSIE and Opera or MSIE and Trident may exist.
}

if(ua.indexOf("Trident")!=-1) {
    b="Trident";
    browser="Internet Explorer";
}

// now for version


var version=ua.match(b+"[ /]+[0-9]+(.[0-9]+)*")[0];

console.log("broswer",browser);
console.log("version",version);