How to check if IE11 is in compatibility view using JS
Question
I'd like to check if IE11 compatibility view is enabled for the current domain. Setting compatibility view is through: Tools > Compatibility View Settings.
I know this has been asked by a few a couple of years ago but looks like the answers doesn't work anymore due to recent update on IE11.
Does anyone know an alternative way to do this?
2 answers
solution1
1 2017-10-17 05:40:31
In IE versions 8-11 You can use document.documentMode . Valid values are 5, 7 (compatibility mode), 8, 9, 10, and 11 (Edge).
Setting compatibility mode in the console changes the value directly.
Loading a page with a
<meta http-equivtag changes the valueAdding a site to compatibility mode in "Tools -> Compatibility View settings" changes the value to 7.
https://msdn.microsoft.com/en-us/library/jj676915(v=vs.85).aspx
Examples
For example if I load this page in IE11 I get documentMode of 11.
<!doctype HTML>
<body>
<p>Hello World!<p>
</body>
This page loaded in IE11 sets documentMode to 9.
<html>
<head>
<meta http-equiv="x-ua-compatible" content="IE=9"/>
</head>
<body>
<p>Hello World!<p>
</body>
</html>
solution2
0 2017-10-17 01:56:05
If you just wanting to check if you are being run in compatibility mode you can use this script.
// Create new ieUserAgent object
var ieUserAgent = {
init: function () {
// Get the user agent string
var ua = navigator.userAgent;
this.compatibilityMode = false;
// alert (ua);
if(ua.indexOf("MSIE") == -1){
this.version = 0;
return 0;
}
if(ua.indexOf("compatible") == -1){
this.compatibilityMode = false;
return 0;
}else{
this.compatibilityMode = true;
return 0;
}
}
};
// Initialize the ieUserAgent object
ieUserAgent.init();
-OR-
/** * Check if client is IE and in compatibility view * * @returns {boolean} */
function isIECompatibilityMode() {
var ua = navigator.userAgent;
if (ua.indexOf("MSIE") == -1) {
return false;
}
return (ua.indexOf("compatible") != -1); }
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