Allow only IE 11 and other browsers but not any of the lower versions of IE starting IE 10

Question

With the code below, I'm unable to alert users to using only IE11 and any other browser but not lower versions of IE starting IE 10. How can I refine my jQuery to achieve it?

jQuery(document).ready(function($){
var isIE11 = !!window.MSInputMethodContext && !!document.documentMode;
// true on IE11
// false on Edge and other IEs/browsers.        filters.hide();
// Objective: Allow only IE 11 and other browsers like Edge, Chrome, Safar, firefox so on,
// but never all lower versions of IE starting IE 10.
if (isIE11 === FALSE) {
  alert("Your web browser is out of date. Please complete this form using an approved browser, 
  such as Edge, Chrome, Safari, or Firefox.");
}

});