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does anyone know how to check if IE 11 compatibility mode is ON when I'm on a website through javascript?
I added the url to the list compatibility view settings. But when I do
navigator.userAgent
in developer tools, it returns
Mozilla/5.0 (Windows NT 6.3; WOW64; Trident/7.0; .NET4.0E; .NET4.0C; .NET CLR 3.5.30729; .NET CLR 2.0.50727; .NET CLR 3.0.30729; InfoPath.3; rv:11.0) like Gecko
Looking at the microsoft website (http://msdn.microsoft.com/en-us/library/ie/hh869301(v=vs.85).aspx), it says
The compatible ("compatible") and browser ("MSIE") tokens have been removed.
Any help on detecting whether a page is using compatibility view via javascript would be really helpful. Thanks in advance.
544
Open Internet Explorer for the desktop, click Tools, and then click Compatibility View settings. In the Compatibility View Settings box, add the problematic website URL, and then click Add. Compatibility View is turned on for this single website, for this specific computer.
Internet Explorer 11 doesn't support JavaScript versions later than ES5. If you want to use the syntax and features of ECMAScript 2015 or later, or TypeScript, you have two options as described in this article. You can also combine these two techniques.
SOLVED
While searching for an answer to this question myself, I found this solution from Nenad Bulatovic in another thread but his response wasn't marked as the correct answer. I tested this out in IE11 and downgrading to IE5 and found that it works for IE7-IE11, which is great. I wanted to share it here in case anyone else finds it useful.
iecheck.js
function trueOrFalse() {
return true;
}
function IeVersion() {
//Set defaults
var value = {
IsIE: false,
TrueVersion: 0,
ActingVersion: 0,
CompatibilityMode: false
};
//Try to find the Trident version number
var trident = navigator.userAgent.match(/Trident\/(\d+)/);
if (trident) {
value.IsIE = true;
//Convert from the Trident version number to the IE version number
value.TrueVersion = parseInt(trident[1], 10) + 4;
}
//Try to find the MSIE number
var msie = navigator.userAgent.match(/MSIE (\d+)/);
if (msie) {
value.IsIE = true;
//Find the IE version number from the user agent string
value.ActingVersion = parseInt(msie[1]);
} else {
//Must be IE 11 in "edge" mode
value.ActingVersion = value.TrueVersion;
}
//If we have both a Trident and MSIE version number, see if they're different
if (value.IsIE && value.TrueVersion > 0 && value.ActingVersion > 0) {
//In compatibility mode if the trident number doesn't match up with the MSIE number
value.CompatibilityMode = value.TrueVersion != value.ActingVersion;
}
return value;
}
iecheck.html
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>Testing IE Compatibility Mode</title>
<script src="iecheck.js" type="text/javascript"></script>
</head>
<body>
<div id="results">Results: </div>
</br>
<script type="text/javascript">
var ie = IeVersion();
document.write("IsIE: " + ie.IsIE + "</br>");
document.write("TrueVersion: " + ie.TrueVersion + "</br>");
document.write("ActingVersion: " + ie.ActingVersion + "</br>");
document.write("CompatibilityMode: " + ie.CompatibilityMode + "</br>");
</script>
</body>
</html>
source: Detect IE10 compatibility mode
189
I wrote a JavaScript function, ie-truth, to do just this. How it works is that in IE 11 if compatibility mode is turned on, the User Agent string will contain the Trident version number for IE 11 (7.0) as well as the MSIE version number for an older version of IE (such as 7.0 for IE 7). This also applies to compatibility mode in older versions of IE.
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