Modernizr tests for IE10 & IE11, since they removed conditional comments (and still haven't gotten browsers quite right)

ie10plus.modernizr.js

// IE10
Modernizr.addTest('ie10', function() {
  // http://stackoverflow.com/questions/9900311/how-do-i-target-only-internet-explorer-10-for-certain-situations-like-internet-e
  'use strict';
  var match = (/*@cc_on!@*/false && document.documentMode === 10);
  return match;
});


// IE11
Modernizr.addTest('ie11', function() {
  // https://en.wikipedia.org/wiki/Internet_Explorer_11
  'use strict';
  // var ua = navigator.userAgent;
  // var match = /Trident.*rv[\s:]11\./i.test(ua);
  // ('msTransform' in document.body.style)
  var match = (!!document.documentMode &&
                !document.all &&
                (!!window.matchMedia || !!window.msMatchMedia) &&
                !Modernizr.websqldatabase &&
                !Modernizr.cssreflections);
  return match;
});

Works for IE11 but not IE10 for me.

The following addition to the IE11 check will prevent it from including Microsoft Edge browser.

return match && (window.navigator.userAgent.indexOf('Edge/') == -1)

It may be cleaner to check for features, but meanwhile, this works.