Disable site when ie access in quirks mode

Question

i'm trying to disable my website when a user access the site in ie and use the quirks mode, someone know a script in php or javascript that disable or verify this case?

Thanks.

Answer 1

You can check document.compatMode and see if it matches "CSS1Compat".

var isQuirky = (document.compatMode !== 'CSS1Compat');
if (isQuirky === true) {
  alert('Your browser is rendering this page in quirks mode, and it may not display properly.');
}