Modernizr Position Fixed + Transforms Combo Test

gistfile1.txt

//Test if browser supports position fixed and transforms in combination
//http://stackoverflow.com/questions/18572488/transform-doesnt-work-on-position-fixed-divs-on-android
Modernizr.addTest('fixedtransforms', function(){
  var css = '#modernizr { position: fixed; top: 0; left: 10px; width: 100%; height: 50px; -moz-transform: transformX(-20px); -ms-transform: translateX(-20px); -webkit-transform: translateX(-20px); transform: translateX(-20px); }';

  return Modernizr.testStyles(css, function(element, rule){
    //NOTE: Android gives false positives
    return navigator.userAgent.indexOf('Android 4.1') === -1 &&
           navigator.userAgent.indexOf('Android 2.') === -1 &&
           element.getBoundingClientRect().left === -10;
  });
});