detect IE version irrespective of compatibility mode and emulation

Handy script to detect IE version irrespective of compatibility mode and emulation

// detect IE
var IEversion = detectIE();

if (IEversion !== false) {
document.getElementById(‘result’).innerHTML = ‘IE ‘ + IEversion;
} else {
document.getElementById(‘result’).innerHTML = ‘NOT IE’;
}

// add details to debug result
document.getElementById(‘details’).innerHTML = window.navigator.userAgent;

/**

  • detect IE
  • returns version of IE or false, if browser is not Internet Explorer

*/
function detectIE() {
var ua = window.navigator.userAgent;

// test values
// IE 10
//ua = ‘Mozilla/5.0 (compatible; MSIE 10.0; Windows NT 6.2; Trident/6.0)’;
// IE 11
//ua = ‘Mozilla/5.0 (Windows NT 6.3; Trident/7.0; rv:11.0) like Gecko’;
// IE 12
//ua = ‘Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/39.0.2171.71 Safari/537.36 Edge/12.0’;

var msie = ua.indexOf(‘MSIE ‘);
if (msie > 0) {
// IE 10 or older => return version number
return parseInt(ua.substring(msie + 5, ua.indexOf(‘.’, msie)), 10);
}

var trident = ua.indexOf(‘Trident/’);
if (trident > 0) {
// IE 11 => return version number
var rv = ua.indexOf(‘rv:’);
return parseInt(ua.substring(rv + 3, ua.indexOf(‘.’, rv)), 10);
}

var edge = ua.indexOf(‘Edge/’);
if (edge > 0) {
// IE 12 => return version number
return parseInt(ua.substring(edge + 5, ua.indexOf(‘.’, edge)), 10);
}

// other browser
return false;
}

Advertisements