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Open Internet Explorer, at the upper right, select the Tools button, and then choose About Internet Explorer. Open Internet Explorer, at the upper right, select the Tools button, and then choose About Internet Explorer.
According to Wikipedia, IE8 only supports Javascript 1.5. So they are saying IE8 completely ignores Javascript versions 1.6, 1.7, 1.8 and 1.9.
Browser Detection with JavaScript. If you really must do it, detecting what browser someone is using is easy with JavaScript. JavaScript has a standard object called navigator that contains data about the browser being used.
This is my preferred way of doing it. It gives maximum control. (Note: Conditional statements are only supported in IE5 - 9.)
First set up your ie classes correctly
<!DOCTYPE html>
<!--[if lt IE 7]> <html class="lt-ie9 lt-ie8 lt-ie7"> <![endif]-->
<!--[if IE 7]> <html class="lt-ie9 lt-ie8"> <![endif]-->
<!--[if IE 8]> <html class="lt-ie9"> <![endif]-->
<!--[if gt IE 8]><!--> <html> <!--<![endif]-->
<head>
Then you can just use CSS to make style exceptions, or, if you require, you can add some simple JavaScript:
(function ($) {
"use strict";
// Detecting IE
var oldIE;
if ($('html').is('.lt-ie7, .lt-ie8, .lt-ie9')) {
oldIE = true;
}
if (oldIE) {
// Here's your JS for IE..
} else {
// ..And here's the full-fat code for everyone else
}
}(jQuery));
Thanks to Paul Irish.
Return IE version or if not IE return false
function isIE () {
var myNav = navigator.userAgent.toLowerCase();
return (myNav.indexOf('msie') != -1) ? parseInt(myNav.split('msie')[1]) : false;
}
Example:
if (isIE () == 8) {
// IE8 code
} else {
// Other versions IE or not IE
}
or
if (isIE () && isIE () < 9) {
// is IE version less than 9
} else {
// is IE 9 and later or not IE
}
or
if (isIE()) {
// is IE
} else {
// Other browser
}
Use conditional comments. You're trying to detect users of IE < 9 and conditional comments will work in those browsers; in other browsers (IE >= 10 and non-IE), the comments will be treated as normal HTML comments, which is what they are.
Example HTML:
<!--[if lt IE 9]>
WE DON'T LIKE YOUR BROWSER
<![endif]-->
You can also do this purely with script, if you need:
var div = document.createElement("div");
div.innerHTML = "<!--[if lt IE 9]><i></i><![endif]-->";
var isIeLessThan9 = (div.getElementsByTagName("i").length == 1);
if (isIeLessThan9) {
alert("WE DON'T LIKE YOUR BROWSER");
}
If nobody else has added an addEventLister-method and you're using the correct browser mode then you could check for IE 8 or less with
if (window.attachEvent && !window.addEventListener) {
// "bad" IE
}
Legacy Internet Explorer and attachEvent (MDN)
To detect MSIE (v6 - v7 - v8 - v9 - v10 - v11) easily :
if (navigator.userAgent.indexOf('MSIE') !== -1 || navigator.appVersion.indexOf('Trident/') > 0) {
// MSIE
}
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