Get browser version of IE using Javascript

Question

I am using the following code to get the version of IE in a system.

    var browser = navigator.appName;
    var b_version = navigator.appVersion;
    var version = parseFloat(b_version);
    alert(version);

But the version always get is 4 in IE^ and IE7. How can I get the exact version?

score 7 · Answer 1 · answered Dec 18 '09 at 05:27

You got 4 because of navigator.appVersion strings starts with 4.0 like this.

4.0 (compatible; MSIE 6.0; Windows NT 5.0; ...)

If you do like this, you will get MSIE 6.0 for above case

alert(navigator.appVersion.match(/MSIE [\d.]+/))

If you only want 6.0 you could do like

alert(navigator.appVersion.match(/MSIE ([\d.]+)/)[1])

Avi Flax · Accepted Answer · 2010-02-07T16:42:06.110

4

It's generally not a good idea to use version detection — in fact, even browser detection isn't recommended! Instead, try object detection.

edited Feb 07 '10 at 16:42

answered Dec 18 '09 at 05:14

Avi Flax

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Its really a good technique. But is there any performance issues?? – Sauron Dec 18 '09 at 06:06
I'm pretty sure there are not. This is, as I understand it, a "best practice". – Avi Flax Dec 18 '09 at 18:18
And it's certainly faster than anything involving regular expressions, and probably string slicing too. – Avi Flax Dec 18 '09 at 18:18

score 2 · Answer 3 · edited May 23 '17 at 11:58

2

The below function isIE returns IE version if IE is detected else returns FALSE

function isIE () {
  var myNav = navigator.userAgent.toLowerCase();
  return (myNav.indexOf('msie') != -1) ? parseInt(myNav.split('msie')[1]) : false;
}

This is based on the answer here by weroro.

edited May 23 '17 at 11:58

Community

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answered Jun 25 '13 at 13:24

Binod Kalathil

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score -2 · Answer 4 · answered Dec 18 '09 at 05:13

Try something like this:

<script language="javascript">
        Event.observe(window, 'load', function() {
            var el = $("browserName");
            var BO = detectBrowser();
            if(BO.ie6){
                el.innerHTML = "<b>We do not support IE6. Please click <a href=\"http://www.microsoft.com/windows/downloads/ie/getitnow.mspx\">here</a> to upgrade.</b>";
            }else{
                el.innerHTML = "<b>Thank You for not running IE6.</b>";
            }
        });
</script>

Where from the 'Event.observe'? – Sauron Dec 18 '09 at 05:17 — Sauron, Dec 18 '09 at 05:17

Get browser version of IE using Javascript

4 Answers4

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