How to detect IE 11 with javascript in Asp.net

Question

Hello I want to detect the Browser , IE 8 or more will be appropriate for me. For this i used following code but it fails for IE 11 . For other its detecting properly.

Answer 1

As already stated - dont do browser detection, rather do feature detection. However as I see your script is an older version of a script the circulates around here. This is the updated version that detects IE 11 aswel:

function getInternetExplorerVersion()
                            {
                                var rv = -1;
                                if (navigator.appName == 'Microsoft Internet Explorer')
                                {
                                    var ua = navigator.userAgent;
                                    var re  = new RegExp("MSIE ([0-9]{1,}[\.0-9]{0,})");
                                    if (re.exec(ua) != null)
                                        rv = parseFloat( RegExp.$1 );
                                }
                                else if (navigator.appName == 'Netscape')
                                {
                                    var ua = navigator.userAgent;
                                    var re  = new RegExp("Trident/.*rv:([0-9]{1,}[\.0-9]{0,})");
                                    if (re.exec(ua) != null)
                                        rv = parseFloat( RegExp.$1 );
                                }
                                return rv;
                            }