How to Detect Internet Explorer (Ie) and Microsoft Edge Using JavaScript

How can I detect Internet Explorer (IE) and Microsoft Edge using JavaScript?

I don't know why, but I'm not seeing "Edge" in the userAgent like everyone else is talking about, so I had to take another route that may help some people.

Instead of looking at the navigator.userAgent, I looked at navigator.appName to distinguish if it was IE<=10 or IE11 and Edge. IE11 and Edge use the appName of "Netscape", while every other iteration uses "Microsoft Internet Explorer".

After we determine that the browser is either IE11 or Edge, I then looked to navigator.appVersion. I noticed that in IE11 the string was rather long with a lot of information inside of it. I arbitrarily picked out the word "Trident", which is definitely not in the navigator.appVersion for Edge. Testing for this word allowed me to distinguish the two.

Below is a function that will return a numerical value of which Internet Explorer the user is on. If on Microsoft Edge it returns the number 12.

Good luck and I hope this helps!

function Check_Version(){
    var rv = -1; // Return value assumes failure.

    if (navigator.appName == 'Microsoft Internet Explorer'){

       var ua = navigator.userAgent,
           re  = new RegExp("MSIE ([0-9]{1,}[\\.0-9]{0,})");

       if (re.exec(ua) !== null){
         rv = parseFloat( RegExp.$1 );
       }
    }
    else if(navigator.appName == "Netscape"){                       
       /// in IE 11 the navigator.appVersion says 'trident'
       /// in Edge the navigator.appVersion does not say trident
       if(navigator.appVersion.indexOf('Trident') === -1) rv = 12;
       else rv = 11;
    }       

    return rv;          
}

How do I detect IE and Edge browser?

I doubt you really need to detect the browser. But here it is anyway (don't really need to use a library):

// detect IE8 and above, and edge
if (document.documentMode || /Edge/.test(navigator.userAgent)) {
    alert('Hello Microsoft User!');
}

Check if user is using IE

Use below JavaScript method :

function msieversion() 
{
    var ua = window.navigator.userAgent;
    var msie = ua.indexOf("MSIE ");

    if (msie > 0) // If Internet Explorer, return version number
    {
        alert(parseInt(ua.substring(msie + 5, ua.indexOf(".", msie))));
    }
    else  // If another browser, return 0
    {
        alert('otherbrowser');
    }

    return false;
}

You may find the details on below Microsoft support site :

How to determine browser version from script

Update : (IE 11 support)

function msieversion() {

    var ua = window.navigator.userAgent;
    var msie = ua.indexOf("MSIE ");

    if (msie > 0 || !!navigator.userAgent.match(/Trident.*rv\:11\./))  // If Internet Explorer, return version number
    {
        alert(parseInt(ua.substring(msie + 5, ua.indexOf(".", msie))));
    }
    else  // If another browser, return 0
    {
        alert('otherbrowser');
    }

    return false;
}

Detecting browser in Edge IE mode

Ok, thank you. I also found out that Internet Options in Win 10 is in Control Panel (not exclusive to IE). It looks to be the IE options interface but in a more generalized scope (so if you have IE Mode within Edge window, these should apply). It appears that zone-specific stuff like Initialize and script ActiveX controls not marked as safe for scripting can be set here. I tested these out and they do apply to IE

How to detect IE/Edge using javascript?

You can use this custom script to detect IE/Edge:

if (/MSIE 10/i.test(navigator.userAgent)) {
   // this is internet explorer 10
   window.alert('isIE10');
}

if(/MSIE 9/i.test(navigator.userAgent) || /rv:11.0/i.test(navigator.userAgent)){
    // this is internet explorer 9 and 11
    window.location = 'pages/core/ie.htm';
}

if (/Edge\/12./i.test(navigator.userAgent)){
   // this is Microsoft Edge
   window.alert('Microsoft Edge');
}

Check out this page for the latest IE and Edge user agent strings: https://msdn.microsoft.com/en-us/library/hh869301%28v=vs.85%29.aspx

How to detect Safari, Chrome, IE, Firefox and Opera browsers?

Googling for browser reliable detection often results in checking the User agent string. This method is not reliable, because it's trivial to spoof this value.

I've written a method to detect browsers by duck-typing.

Only use the browser detection method if it's truly necessary, such as showing browser-specific instructions to install an extension. Use feature detection when possible.

Demo: https://jsfiddle.net/6spj1059/

// 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'] || (typeof safari !== 'undefined' && window['safari'].pushNotification));

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

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

// Chrome 1 - 79
var isChrome = !!window.chrome && (!!window.chrome.webstore || !!window.chrome.runtime);

// Edge (based on chromium) detection
var isEdgeChromium = isChrome && (navigator.userAgent.indexOf("Edg") != -1);

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

var output = 'Detecting browsers by ducktyping:<hr>';
output += 'isFirefox: ' + isFirefox + '<br>';
output += 'isChrome: ' + isChrome + '<br>';
output += 'isSafari: ' + isSafari + '<br>';
output += 'isOpera: ' + isOpera + '<br>';
output += 'isIE: ' + isIE + '<br>';
output += 'isEdge: ' + isEdge + '<br>';
output += 'isEdgeChromium: ' + isEdgeChromium + '<br>';
output += 'isBlink: ' + isBlink + '<br>';
document.body.innerHTML = output;

Block visitors from internet explorer or microsoft edge

First of all, I don't recommend using that on your website. if there is some functionality that doesn't support this browser you can show a notification or popup telling the user to switch his browser to get a better experiment.

but if you see that is the better solution you can check this code example from here to check the user browser:

 let userAgent = navigator.userAgent;
 let browserName;
 
 if(userAgent.match(/chrome|chromium|crios/i)){
     browserName = "chrome";
   }else if(userAgent.match(/firefox|fxios/i)){
     browserName = "firefox";
   }  else if(userAgent.match(/safari/i)){
     browserName = "safari";
   }else if(userAgent.match(/opr\//i)){
     browserName = "opera";
   } else if(userAgent.match(/edg/i)){
     browserName = "edge";
   }else{
     browserName="No browser detection";
   }
 
  document.querySelector("h1").innerText="You are using "+ browserName +" browser";         

And this for redirect to another page:

window.location.replace("http://www.EXAMPLE.com");

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